Copyright Amprobe 2005
DMIII MultiTest
User’s Manual
AMPROBE
DMIII MULTITEST
EN-1
INDEX
1. SAFETY PRECAUTIONS AND PROCEDURES .......................................................................................... 4
1.1. Forwards .................................................................................................................................................................. 4
1.2. Preliminary Instruction ............................................................................................................................................. 4
1.3. During Use ............................................................................................................................................................... 5
1.4. After Use .................................................................................................................................................................. 5
2. GENERAL DESCRIPTION ........................................................................................................................... 6
2.1. Introduction .............................................................................................................................................................. 6
2.2. Functions ................................................................................................................................................................. 6
3. PREPARATION FOR USE ........................................................................................................................... 7
3.1. Initial Control ............................................................................................................................................................ 7
3.2. Power Supply ........................................................................................................................................................... 7
3.3. Calibration ................................................................................................................................................................ 8
3.4. Storage .................................................................................................................................................................... 8
4. INSTRUMENT DESCRIPTION ..................................................................................................................... 9
4.1. Display Description ................................................................................................................................................ 10
4.2. Initial Screen .......................................................................................................................................................... 10
4.3. Backlight function ................................................................................................................................................... 10
5. INITIAL SETTINGS ......................................................................................................................................11
5.1. How To Adjust The Contrast .................................................................................................................................. 11
5.2. How To Set Date And Time ................................................................................................................................... 11
5.3. How To Set The Language .................................................................................................................................... 11
5.4. How To Adjust The Country ................................................................................................................................... 11
5.5. RESET ................................................................................................................................................................... 12
6. SAFETY TEST FUNCTIONS .......................................................................................................................13
6.1. LOW: Continuity Test with 200mA Test Current ................................................................................................. 13
6.1.1. Calibrating the test leads ("CAL" Mode) ..........................................................................................................................14
6.1.2. Measurement Procedure .................................................................................................................................................16
6.1.3. Results of "AUTO" mode .................................................................................................................................................17
6.1.4. Results of "RT+" and "RT-" modes ..................................................................................................................................17
6.1.5. "AUTO", RT+", "RT-" faulty cases ....................................................................................................................................19
6.2. INSULATION TEST: Insulation Resistance Measurement ....................................................................................... 21
6.2.1. Measurement Procedure .................................................................................................................................................21
6.2.2. Results of "MAN" mode ...................................................................................................................................................23
6.2.3. Results of "TMR" mode ....................................................................................................................................................24
6.2.4. "MAN" and "TIMER" mode faulty cases ...........................................................................................................................25
6.3. : Phase Sequence Indicator ............................................................................................................................. 26
6.3.1. Measurement procedure and results of " " mode .......................................................................................................26
6.3.2. Faulty Cases ............................................................................................................................................................28
6.4. GROUND TEST: Soil Resistance and Resistivity Measurements ......................................................................... 30
6.4.1. Measurement procedure and results of "2-W"and "3-W" mode .......................................................................................30
6.4.2. Measurement procedure and results of "" mode .........................................................................................................32
6.4.3. "2-W", "3-W" and "" faulty cases ..................................................................................................................................34
7. POWER QUALITY .......................................................................................................................................36
7.1. Basic Setting: ANALYZER CONFIG ...................................................................................................................... 37
7.1.1. Type of electrical system under test ................................................................................................................................37
7.1.2. How to set the fundamental frequency ............................................................................................................................37
7.1.3. How to set the Clamp Type..............................................................................................................................................38
7.1.4. How to set the current range............................................................................................................................................38
7.1.5. How to set the value of the transformer voltage ratio (TV RATIO) ..................................................................................38
7.1.6. How to enable/disable the password ...............................................................................................................................38
7.2. Basic Setting: RECORDER CONFIG..................................................................................................................... 39
7.3. POWER QUALITY FUNCTIONS ........................................................................................................................... 46
AMPROBE
DMIII MULTITEST
EN-2
7.4. "VOLTAGE" function .............................................................................................................................................. 47
7.4.1. Symbols ...........................................................................................................................................................................47
7.4.2. "METER" mode ................................................................................................................................................................48
7.4.3. "HARM" mode ..................................................................................................................................................................49
7.4.4. "WAVE" mode ..................................................................................................................................................................51
7.5. "CURRENT" function ............................................................................................................................................. 52
7.5.1. Symbols ...........................................................................................................................................................................52
7.5.2. “METER" mode ................................................................................................................................................................53
7.5.3. “HARM" mode ..................................................................................................................................................................54
7.5.4. "WAVE" mode ..................................................................................................................................................................56
7.6. "POWER" function ................................................................................................................................................. 57
7.6.1. Symbols ...........................................................................................................................................................................57
7.6.2. "METER" mode ................................................................................................................................................................58
7.6.3. "WAVE" mode ..................................................................................................................................................................60
7.7. "ENERGY" function ................................................................................................................................................ 61
7.7.1. Symbols ...........................................................................................................................................................................61
7.7.2. "METER" mode ................................................................................................................................................................62
8. MEASURING PROCEDURES .....................................................................................................................63
8.1. Using the instrument in a single-phase system ...................................................................................................... 63
8.2. Using the Instrument in a three-phase 4-wire system ............................................................................................ 64
8.3. Using the Instrument in a three-phase 3-wire system ............................................................................................ 65
9. SAVING RESULTS ......................................................................................................................................67
9.1. Saving Safety Test Results .................................................................................................................................... 67
9.2. Saving Displayed Values of POWER QUALITY Function ...................................................................................... 67
10. RECORDINGS .............................................................................................................................................68
10.1. Start A Recording ................................................................................................................................................... 68
10.2. During A Recording ................................................................................................................................................ 70
10.2.1. MENU key ........................................................................................................................................................................70
10.2.2. Rotary Switch during a recording .....................................................................................................................................71
10.3. Stopping a Recording / Energy Measurement ....................................................................................................... 71
11. INSTRUMENT'S MEMORY .........................................................................................................................72
11.1. SAFETY TEST MEMORY ...................................................................................................................................... 72
11.2. ANALYZER MEMORY ........................................................................................................................................... 73
12. CONNECTING THE INSTRUMENT TO A PC .............................................................................................74
13. MAINTENANCE...........................................................................................................................................75
13.1. General Instruction ................................................................................................................................................. 75
13.2. Battery Replacement ............................................................................................................................................. 75
13.3. Instrument Cleaning ............................................................................................................................................... 75
14. TECHNICAL SPECIFICATIONS .................................................................................................................76
14.1. Technical Features ................................................................................................................................................ 76
14.1.1. Safety Test functions .......................................................................................................................................................76
14.1.2. POWER QUALITY function .............................................................................................................................................77
14.2. Standards .............................................................................................................................................................. 78
14.2.1. General ............................................................................................................................................................................78
14.2.2. Safety Test .......................................................................................................................................................................78
14.2.3. POWER QUALITY ...........................................................................................................................................................78
14.3. General Specifications ........................................................................................................................................... 79
14.3.1. Mechanical Data ..............................................................................................................................................................79
14.3.2. Power supply ...................................................................................................................................................................79
14.3.3. Display .............................................................................................................................................................................79
14.3.4. Memory ............................................................................................................................................................................79
14.4. ENVIRONMENT .................................................................................................................................................... 79
14.5. ACCESSORIES ..................................................................................................................................................... 80
15. SERVICE .....................................................................................................................................................81
15.1. WARRANTY CONDITIONS ................................................................................................................................... 81
15.2. SERVICE ............................................................................................................................................................... 81
16. PRACTICAL REPORTS FOR ELECTRICAL TESTS .................................................................................82
AMPROBE
DMIII MULTITEST
EN-3
16.1. Continuity Test On Protective Conductors ............................................................................................................. 82
16.2. Check of the Circuit Separation ............................................................................................................................. 83
16.3. Measurement Of Floor Insulation Resistance In Medical Rooms Cei 64-4 ............................................................ 86
16.4. Ground Resistance Measurement ......................................................................................................................... 88
16.5. Ground Resistivity Measurement ........................................................................................................................... 89
16.6. Voltage Anomalies (Voltage Sag and Surge) ......................................................................................................... 91
16.7. Voltage and current Harmonics ............................................................................................................................. 91
16.7.1. Theory ..............................................................................................................................................................................91
16.7.2. Limit values for harmonics ...............................................................................................................................................93
16.7.3. Presence of harmonics: causes .......................................................................................................................................93
16.7.4. Presence of harmonics: consequences ...........................................................................................................................94
16.8. Power and Power Factor definition ........................................................................................................................ 94
16.8.1. Conventions on powers and power factors ......................................................................................................................96
16.8.2. 3 Phase 3 Wire System ...................................................................................................................................................97
16.9. Measuring Method: outlines ................................................................................................................................... 98
16.9.1. Integration periods ...........................................................................................................................................................98
16.9.2. Power factor calculations .................................................................................................................................................98
16.9.3. Voltage Anomalies and Periods Analysis comparison .....................................................................................................98
17. APPENDIX 1 – MESSAGES DISPLAYED ................................................................................................100
18. APPENDIX 2 – RECORDABLE PARAMETERS: SYMBOLS ...................................................................101
Release EN 1.00 of the 31/06/2005
AMPROBE
DMIII MULTITEST
EN-4
1. SAFETY PRECAUTIONS AND PROCEDURES
1.1. FORWARDS
This instrument conforms to the safety standards EN61557 and EN 61010-1 relating to
electronic measuring instruments.
WARNING
For your own safety as well as that of the instrument you are recommended
to follow the procedures described in this instruction manual and carefully
read all the notes preceded by the symbol .
Strictly adhere to the following instructions before and during measurements:
Do not measure voltage or current in wet or dusty places;
Do not measure in presence of gas, explosive materials or combustibles;
Do not touch the circuit under test if no measurement is being taken;
Do not touch exposed metal parts, unused terminals, circuits and so on;
Do not effect any measurement in case of unusual conditions of the instrument such as
deformation, breakage, leakage of substances, absence of display reading etc;
Do not use the External power supply adapter (code DMT-EXTPS) if you notice
deformation, or breakage in the case, in the wire or in the plugs;
Pay careful attention when measuring voltages exceeding 25V in particular places
(building yards, swimming pools, etc.) and 50V in ordinary places because of the risk of
electric shock;
Use only cables and accessories approved by Amprobe;
The following symbols are used in this manual:
Caution: refer to the instructions in this manual; improper use may damage the
apparatus or its components.
AC Voltage or Current.
Unidirectional pulsating Voltage or Current.
Rotary switch of the instrument.
1.2. PRELIMINARY INSTRUCTION
This instrument has been designed for use in environments with a pollution level 2 and
up to (and no more than) 2000 meters altitude.
It can be used for Safety Test on Installation with Over voltage Category III 300V~
(phase to earth) and for voltage and current measurements on installations with over
voltage category III 600 V~ phase-to-phase / 300 V~ phase to earth or CATII 350 V
phase to earth.
AMPROBE
DMIII MULTITEST
EN-5
Please keep to the usual safety standards aimed at:
Protecting against dangerous currents;
Protecting the instrument against incorrect operations.
Only the accessories supplied with the instrument guarantee compliance with the
safety standards. Accordingly, they must be in good conditions and, if necessary, they
must be replaced with identical models.
Do not take measurements on circuits exceeding the specified current and voltage
limits.
Before connecting cables, alligator clips and clamps to the circuit under test, make sure
that the right function has been selected.
Do not take any measurements under environmental conditions beyond the limits
specified in paragraph 14.4.
Check that batteries are not weak and are installed correctly.
Before connecting test leads to the circuit under test, check that rotary switch position
is correct.
1.3. DURING USE
Please read the following recommendations carefully and instructions:
WARNING
Non-compliance with the Warnings and/or Instructions may damage the
apparatus and/or its components or injure the operator.
Before selecting any function disconnect the test leads from the circuit under test.
When the instrument is connected to the circuit under test do not touch any unused
terminal.
Avoid taking resistance measurements in the presence of external voltages; even
though the instrument is protected, a high voltage may cause malfunctions.
When measuring current, other currents located near the leads may affect the
measuring accuracy.
When measuring current, always position the wire in the middle of the jaws in order to
obtain the highest accuracy.
A measured value remains constant if the "HOLD" function is active. Should you notice
that the measured value remains unchanged, disable the “HOLD” function.
WARNING
The symbol " " shows the battery charge: When it is completely black the
batteries are full charged, while the " " symbol indicates weak batteries.
When the batteries are too low to execute a test, the instrument will show a
warning message.
In this case, interrupt testing and replace batteries, following the procedure
described in paragraph 13.2. The instrument is capable of keeping the data
stored even though batteries are not installed. The Instrument Date and
Time settings aren't lost if you change the batteries within 24hours.
1.4. AFTER USE
After use, turn off the instrument by pressing & holding ON/OFF for a few seconds.
Remove batteries when the apparatus remains unused for long periods. Please follow
the storage instructions described at paragraph 14.4.
AMPROBE
DMIII MULTITEST
EN-6
2. GENERAL DESCRIPTION
2.1. INTRODUCTION
Dear Customer, we thank you for your patronage. The instrument you have just purchased
will grant you accurate and reliable measurements provided that it is used according to the
present manual’s instructions.
The instrument was designed to grant the user the utmost safety conditions thanks to a
new concept assuring double insulation and over voltage category III.
2.2. FUNCTIONS
The instrument is able to perform the following tests:
LOW: Continuity Test of Protection and Equalising conductors with a test
current higher than 200mA and open circuit voltage ranging from 4V to
24V.
INSULATION TEST: Measurement of insulation resistance with DC test voltage 50V, 100V,
250V, 500V or 1000V.
: Indication of phase rotation sequence
GROUND TEST Measurement of Ground Resistance and Resistivity using Earth rods.
POWER QUALITY: The Instrument allows the following operations:
Display in real time the electrical parameters of a single-phase
and three-phase systems and the harmonic analysis of voltage
and current.
Conduct a direct Energy measurement (without memorizing).
Memorize (by pressing the SAVE key) the sampled values of the
Parameters present at instrument input generating a "Smp" record
inside instrument memory. It will be possible to analyze the
memorized data ONLY by transferring it to a PC.
Record simultaneously (pressing the START key after a proper
set up): RMS values of voltages, currents, corresponding
harmonics, active, reactive and apparent powers, power factors
and cos, active, reactive and apparent energies, voltage
anomalies (voltage sag and surge) with 10ms resolution. It will be
possible to analyze the recorded data ONLY by transferring
them to a PC.
WARNING
Please note the difference between memorize and record. These terms
will be used repeatedly in this manual. Please focus on their definitions and
distinctions.
AMPROBE
DMIII MULTITEST
EN-7
3. PREPARATION FOR USE
3.1. INITIAL CONTROL
This instrument has been checked mechanically and electrically prior to shipment.
Care has been taken to ensure that the instrument reaches you under safe conditions.
You are recommended, however, to carry out a rapid check to detect any possible
damage, which might have been caused during transport. Should this be the case,
immediately contact Amprobe.
Also, check that the packaging contains all the parts listed under paragraph 14.5. In case
of discrepancies contact the dealer.
In case you have to send the instrument back please follow the instructions reported in
paragraph 15.
3.2. POWER SUPPLY
The instrument can be powered by:
6 batteries 1.5V AA series located in the compartment on the back of the instrument
(not included in the package). For battery life see paragraph 14.3.2.
An external power supply adapter (code DMT-EXTPS) to be used only for
POWER QUALITY functions. We recommend that you use only DMT-EXTPS
Amprobe Power Supply adapter.
For your own safety you’re not able to use the external power supply adapter during
Safety Test (LOW, INSULATION TEST, ,GROUND TEST rotary Switch positions).
If you press the START button the Instrument will show the message " REMOVE
POWER".
The symbol shows the battery charge: If it is completely "black" the batteries are
fully charged, while the symbol indicates weak batteries. When the batteries are too
low to execute the test the instrument will show a warning message. In this case interrupt
testing and replace the batteries following the procedure described in paragraph 13.2. The
instrument is capable of keeping the data stored even though batteries are not installed.
The Instrument Date and Time settings aren't lost if you change the batteries within
24hours.
AMPROBE
DMIII MULTITEST
EN-8
WARNING
For recordings (POWER QUALITY function) ALWAYS use the external
power supply adapter (code DMT-EXTPS) even the instrument allows the
operator to perform a recording using internal batteries. If during a recording
the external power supply adapter is de-energized, the instrument will
continue the recording using the internal battery power until the batteries
are exhausted (the data stored up to the point the instrument shuts down
won’t get lost). Because of this we recommend you ALWAYS insert a new
set of batteries before a long recording.
The instrument uses sophisticated algorithms to prolong the battery life. Specifically:
The instrument switches OFF the backlight Automatically after 5 seconds.
If the instrument is displaying in real time (and the external power supply adapter is not
connected), after about 5 minutes from the last key press or switch rotation the
instrument turns off automatically ("AUTOPOWER OFF" procedure).
If the instrument is recording or is measuring energy (and the external power supply is
not connected), after about 5 minutes from the last key press or switch rotation the
instrument starts a special procedure to save the batteries ("ECONOMY MODE"): the
instrument keeps recording but the display is turned off.
3.3. CALIBRATION
The instrument fulfils the technical specifications listed in this manual. The performance of
the specifications is guaranteed for one year.
3.4. STORAGE
In order to maintain the accuracy of the measurements, after a period of storage in
extreme environmental conditions, wait the necessary time for the apparatus to return to
normal operating conditions (see environmental specifications listed in paragraph 14.4).
AMPROBE
DMIII MULTITEST
EN-9
4. INSTRUMENT DESCRIPTION
SAVE
F1 F3 F4
F2
HOLD
ENTER
MENU ESC
START
STOP
1
2
3
LEGEND:
1. Display
2. Function Keys
3. Rotary switch
Front panel of the Instrument
Multifunction Keys.
ON/OFF and backlight key. Press it for few seconds to switch OFF the
instrument, press it briefly to activate the backlight function.
This key starts (and stops) the measurements.
This key saves the result displayed.
This key has 2 functions: it is the confirmation key inside the
configuration menu and it freezes the displayed results using the
POWER QUALITY function.
This key opens the General Configuration Menu.
This key cancels modification in the configuration menus or the selected
working modes.
F1
START
STOP
HOLD
ENTER
MENU
F2
F4
F3
ON/OFF
SAVE
ESC
AMPROBE
DMIII MULTITEST
EN-10
4.1. DISPLAY DESCRIPTION
The display is a graphic module with a resolution of 128 x 128 pixels
The first line of the display shows date and time. If not correct, you can set the exact ones
according to the procedure described at paragraph 5.2.
On the top right corner of the display you can always see the battery indicator and, if the
external power supply adapter (code DMT-EXTPS) is connected, the corresponding
symbol.
LOW 05.06.01
27.09.00 17:35:12
----
R+ R-
---- ----
---mA ---mA
AUTO 0.11
SINGLE PHASE
VOLTAGE
V1 = 230.2 V
Vpk1 = 325.5 V
ThdV = 0.0 %
freq = 50.0 Hz
FUNC
CAL
HARM
WAVE
These symbols will be omitted in the following illustrations.
4.2. INITIAL SCREEN
When turning on the instrument by pressing ON/OFF, this screen will appear for a few
seconds:
DMIII
Multitest
AMPROBE
SN:00000000 V: X.XX
BAUD RATE 57600
Here you can see:
Serial number of the instrument (SN.:)
Firmware software release (V.X.XX:)
Transmission speed through serial RS232 (Baud Rate)
4.3. BACKLIGHT FUNCTION
When the instrument is turned on, pressing, briefly, the ON/OFF button, the backlight will
be enabled. The light will be automatically turned off after 5 seconds.
If the batteries are too low the instrument will automatically disable the backlight function.
AMPROBE
DMIII MULTITEST
EN-11
5. INITIAL SETTINGS
By pressing the MENU key the following screen will be displayed:
It’s not possible to enter the MENU during a recording or a Real Time Energy
measurement. Pressing this button during a recording will display the main recording
parameters (see paragraph 10.2).
5.1. HOW TO ADJUST THE CONTRAST
By pressing the multifunction keys F1 and F2, position the cursor on the CONTRAST item
and then press the ENTER key.
By pressing the multifunction keys F3 and F4, adjust the contrast (higher values
correspond to a higher contrast while lower values correspond to a lower contrast) and
press the ENTER key to SAVE the change or press ESC to quit the modification.
This setting will remain unchanged after turning off the instrument.
5.2. HOW TO SET DATE AND TIME
By pressing the multifunction keys F1 and F2, position the cursor on the DATE&TIME item
and then press the ENTER key.
The time is expressed as hh:mm (2 digit for hours, 2 digit for minutes) military time.
Press the ENTER key to SAVE the change or press ESC to quit the modification.
This setting will remain unchanged after turning off the instrument.
5.3. HOW TO SET THE LANGUAGE
By pressing the multifunction keys F1 and F2, position the cursor on the LANGUAGE (EN)
or LINGUA (IT) item and confirm it by pressing the ENTER key.
By pressing the multifunction keys F1 and F2, position the cursor on the desired language
and press the ENTER key to SAVE the change or press ESC to cancel the modification.
This setting will remain unchanged after turning off the instrument.
5.4. HOW TO ADJUST THE COUNTRY
By pressing the multifunction keys F1 and F2, position the cursor on the COUNTRY item
and confirm it by pressing the ENTER key. By pressing the multifunction keys F1 and F1,
select the Country among the following possibilities:
UE_m: European Countries: Distance setting in "meter" for Resistivity measurement
Date format DD/MM/YY
US_m: United States: Distance setting in "meter" for Resistivity measurement
Date format MM/DD/YY
US_ft: United States: Distance setting in "feet" for Resistivity measurement
Date format MM/DD/YY
Press the ENTER key to SAVE the change or press ESC to quit the modification.
This setting will remain unchanged after turning off the instrument.
MENU GENERAL
SAFETY TEST MEMORY
ANALYZER MEMORY
RESET
ANALYZER CONFIG
RECORDER CONFIG
CONTRAST
DATE&TIME
LANGUAGE
COUNTRY
AMPROBE
DMIII MULTITEST
EN-12
5.5. RESET
This option re-establishes the default settings of the instrument.
ANALYZER CONFIG:
Type of electrical equipment: Three Phase 4 wires
Frequency: not modified
Clamp full scale: not modified
Clamp type: not modified
Transforming ratio of voltmetric transformers: 1
Password: disabled
RECORDER CONFIG:
Start: manual (the recording is started
at 00 sec mark on clock after pressing
START/STOP)
Stop: manual
Integration period: 15min
Recording of harmonics: ON
Recording of voltage anomalies (sags and surges): ON
Voltage reference for detection of sags and surges: 110V
Upper limit for detection of sags and surges: 6%
Lower limit for detection of sags and surges: 10%
Selected voltages: V1, V2, V3
Selected voltage harmonics: THD, 01, 03, 05, 07
Selected currents: I1, I2, I3, IN
Selected current harmonics: THD, 01, 03, 05, 07
CO-GENERATION: OFF
Selected powers, Pf and cos: Pt, P1, P2, P3
Qti, Q1i, Q2i, Q3i
Qtc, Q1c, Q2c, Q3c
St, S1, S2, S3
Pft, Pf1, Pf2, Pf3
dpft, dpf1, dpf2, dpf3
Energies: Eat, Ea1, Ea2, Ea3
Erit, Eri1, Eri2, Eri3
Erct, Erc1, Erc2, Erc3
Est, Es1, Es2, Es3
The RESET command will not erase the instrument’s memory.
AMPROBE
DMIII MULTITEST
EN-13
6. SAFETY TEST FUNCTIONS
6.1. LOW: CONTINUITY TEST WITH 200mA TEST CURRENT
The measurement is taken according to EN 61557-2 and VDE 0413 part 4.
WARNING
Before carrying out the continuity test be sure that there is no voltage at the ends
of the conductor under test.
Turn the rotary knob to the LOW position.
This key allows the operator to select one of the following measuring modes:
AUTO mode (the instrument carries out two measurements with reversed
polarity and displays their average value). This mode is recommended
for the continuity test.
RT+ mode (measurement with positive polarity and the ability to set the
duration time of the test). In this case the operator can set a measuring
time long enough to permit them to move the protective conductors while
the instrument is carrying out the test so as to detect any bad
connections.
RT- mode (measurement with negative polarity and the ability to set the
duration time of the test). In this case the operator can set a measuring
time long enough to permit him to move the protective conductors while
the instrument is carrying out the test so as to detect any bad connection.
This key permits the operator to perform a calibration (compensation for the
resistance of the cables used for the measurement).
N.B. If the resistance is lower than 5 (including the resistance of the calibration) the
continuity test is executed by the instrument with a test current higher than 200mA.
If the resistance is higher than 5 the continuity test is executed by the instrument
with a current lower than 200mA.
We recommend that you check the calibration of the test leads before executing a
measurement according to next paragraph.
AMPROBE
DMIII MULTITEST
EN-14
6.1.1. Calibrating the test leads ("CAL" Mode)
1. Connect the black and yellow test leads to T1 and T4 input terminals
respectively.
T1 T2 T3 T4
I1 I2 I3
(V1) (V2) (V3)
(COM)
Connection of instrument terminals during calibration procedure.
2. If the test leads supplied with the instrument are not long enough for the
measurement you can extend the black cable.
3. Short-circuit the measuring cable ends making sure that the conductive parts of the
alligator clips make good contact with each other (see previous picture).
4. Press the F2 key. The instrument performs the calibration.
WARNING
Never disconnect the test leads when the message "MEASURING" is
displayed.
LOW 05.06.01
A numerical value
----
R+ R-
---- ----
---mA ---mA
AUTO 0.11
in this field means
that the instrument
has been
calibrated; this
value remains on
the display for
any further
measurement
even though the
unit is switched off
and on again.
FUNC
CAL
5. At the end of the test the result is stored and used as OFFSET (that is to say
that it is subtracted from any continuity test carried out) for all the
subsequent measurements.
Note: The instrument performs the calibration only if the resistance of the test leads is
lower than 5.
AMPROBE
DMIII MULTITEST
EN-15
TEST LEADS Before each measurement always assure that the
calibration is for the cables in use. During a
continuity test, if the resistance value free of
calibration (that is the resistance value less the
calibration offset value) is negative, the symbol
is displayed. Probably the calibration resistance
value stored in the instrument memory is not for
the cables in use, therefore a new calibration must
be performed.
6.1.1.1. Procedure to reset test leads calibration parameters
To cancel calibration
parameters it is
necessary to perform a
calibration procedure
with a resistance of
test leads higher than
5 (for example with
open test leads). When
a cancellation is effected
the screen to the right
is displayed temporarily.
LOW 05.06.01
Message >99.9:
means that the
instrument detected a
resistance higher
than 5 therefore it
will proceed with
Reset procedure.
>99.9
R+ R-
---- ----
---mA ---mA
AUTO 0.11
FUNC
CAL
AMPROBE
DMIII MULTITEST
EN-16
6.1.2. Measurement Procedure
1. Select the desired mode using the F1 key.
2. Connect the black and yellow test leads to T1 and T4 input terminals
respectively
T1 T2 T3 T4
I1 I2 I3
(V1) (V2) (V3)
(COM)
Connection of the test leads during LOW test.
3. If the cables supplied with the instrument are not long enough for the measurement
you can extend the black cable.
4. Short-circuit the test leads making sure that the conductive parts of the alligator clips
make a good contact to each other. Press the START key. If the display doesn't
show 0.00 repeat the test leads calibration (see paragraph 6.1.1).
5. Connect the instrument terminals to the ends of the conductor under test (see
previous picture).
6. If the mode "RT+" or "RT-" was selected use the F3, F4 keys to set the
duration of the test.
7. Press the START key. The instrument will execute the measurement. In RT+/RT-
(Timer mode) you can press START key again if you want to stop the test before the
duration set is expired.
ATTENTION
Never disconnect the test leads when the message "Measuring" is
displayed.
START
STOP
AMPROBE
DMIII MULTITEST
EN-17
6.1.3. Results of "AUTO" mode
At the end of the test, if
the average resistance
value Ravg is lower
than 5 the instrument
emits a double sound
signal indicating the
positive outcome of
the test and displays a
screen similar to the
screen to the right.
LOW 05.06.01
Average resistance value
(Ravg)
1.05
R+ R-
1.07 1.03
219mA 219mA
AUTO 0.11
Resistance values and
corresponding test currents
obtained after exchanging
the polarities of test leads
FUNC
CAL
The displayed result can be stored by pressing the SAVE key twice (refer to
paragraph 9.1).
6.1.4. Results of "RT+" and "RT-" modes
If a resistance value
RT+ or RT- lower than
5 is detected, the
instrument emits a
double sound signal
indicating the positive
outcome of the test
displays a screen similar
to the screen to the
right.
LOW 05.06.01
Max Resistance value of
R+ or R-.
1.07
219mA
RT+ 0.11 TIME: 10s
Test current
Duration of the Test
FUNC
CAL
Note: We recommend the use of alligator clips and to assure the alligator clips make good
contact with the conductor under test. Indeed, in this test the instrument gives as a
final result the maximum measured value of R+ or R- and using test leads instead of
alligator clips could give you faulty results due to faulty contact between the test leads
and conductor under test
The displayed result can be stored by pressing the SAVE key twice (refer to
paragraph 9.1).
AMPROBE
DMIII MULTITEST
EN-18
AMPROBE
DMIII MULTITEST
EN-19
6.1.5. "AUTO", RT+", "RT-" faulty cases
If the instrument detect
the External Power
supply adapter
connected to instrument
will show the message
displayed to the right.
LOW 05.06.01
-
.- -
R+ R-
--- ---
---mA ---mA
REMOVE POWER
AUTO 0.11
Disconnect the External
Power Supply Adapter
FUNC
CAL
If the terminal voltage is
higher than 15V, the
instrument does not
perform the test and
displays the screen to
the right for 5 seconds.
LOW 05.06.01
-.- -
R+ R-
-.-- -.--
---mA ---mA
VOLT IN INPUT
AUTO 0.11
ATTENTION: the test was
not performed because of
voltage at the terminal
ends.
FUNC
CAL
In the case that:
RCALIBRATION>RMEASURED
the instrument displays
the screen to the right.
LOW 05.06.01
0.00
R+ R-
0.00 0.00
219mA 219mA
CAL > RES
AUTO 0.11
ATTENTION:
RCALIBRATION >RMEASURED
FUNC
CAL
AMPROBE
DMIII MULTITEST
EN-20
THE PREVIOUS RESULTS CAN'T BE SAVED.
If the value of
Resistance is higher
than 5 (but lower than
99.9) the instrument
emits a long beep and
displays a screen similar
to the screen to the right
LOW 05.06.01
Resistance value higher
than 5
5.17
R+ R-
5.17 5.17
209mA 209mA
AUTO 0.11
Test current
FUNC
CAL
The displayed result can be stored pressing the SAVE key twice (refer to
paragraph 9.1).
If the value of
Resistance is higher
than 99.9 the
instrument emits a long
beep and displays the
screen to the right.
LOW 05.06.01
Resistance value higher
than 99.9
> 99.9
R+ R-
-.-- -.--
---mA ---mA
AUTO 0.11
ATTENTION: Value of
Resistance Out of Range
FUNC
CAL
The displayed result can be stored pressing the SAVE key twice (refer to
paragraph 9.1).
AMPROBE
DMIII MULTITEST
EN-21
6.2. INSULATION TEST: INSULATION RESISTANCE MEASUREMENT
The measurements comply with IEC 61557-2 and VDE 0413 part 1.
ATTENTION
Before performing an insulation test make sure that the circuit under test is
not energised and all the loads are disconnected.
Turn the rotary knob to the INSULATION TEST position.
The F1 key allows the operator to select one of the following measuring
modes:
MAN mode (Manual mode) Recommended test.
TMR mode (Timer mode: test duration depends on the selected interval
from 10 to 999 seconds). This test can be executed when the test
required a defined duration.
6.2.1. Measurement Procedure
1. Select the desired mode using the F1 key.
2. Connect the test leads to the instrument input terminals T1 and T4 respectively,
M
T1 T2 T3 T4
I1 I2 I3
(V1) (V2) (V3)
(COM)
Example: insulation measurement between phase and
earth in an electrical installation using untied cables.
3. If the cables supplied with the instrument are not long enough for the measurement
you can extend the black cable.
4. Connect the instrument terminals to the object that is to be submitted to the
insulation test after de-energizing the circuit under test and all the relative
loads (see previous picture).
5. By means of F2 select the test voltage suitable for the type of test to be
performed (see Table1). The values to be selected are:
50V (test on telecommunication system)
100V
250V
500V
1000V
AMPROBE
DMIII MULTITEST
EN-22
Standard
Brief description
Test voltage
Maximum limit value
CEI 64-8/6
Systems SELV or PELV
Systems up to 500V (Civil installations)
Systems over 500V
250VDC
500VDC
1000VDC
> 0.250M
> 0.500M
> 1.0M
CEI 64-8/4
Floor and wall insulation in civil installations
Floor and wall insulation in systems over 500V
500VDC
1000VDC
> 50k (se V<500V)
> 100k (se V>500V)
EN60439
Electrical panel boards 230/400V
500VDC
> 230k
EN60204
Electrical equipment of machines
500VDC
> 1M
CEI 64-4
Floor insulation in medical rooms
500VDC
<1M (if the floor is at least 1 year old)
<100M (if the floor is at least 1year old)
Table1: Table reporting the test voltage and the corresponding limit values for
few Guidelines.
Rated voltage selected
for the test
RMAX = Maximum resistance
value
50VDC
99.9M
100VDC
199.9M
250VDC
499M
500VDC
999M
1000VDC
1999M
Table2: Table of maximum resistance values which can be measured under M
mode depending on the rated voltage selected.
6. If the "TMR" mode was selected use the F3, F4 keys to set the duration time of
the test:
ATTENTION
Never disconnect the test leads from the circuit under test when the
message "MEASURING" is being displayed, as the circuit under test may
remain charged at a dangerous voltage. The instrument has an internal
"safety resistor" which is connect to output terminal before the end of the
test in order to discharge the parasite capacities of the installation.
7. Press the START key.
The instrument will start the test.
MAN Mode: The test will take 4 seconds (maximum). If you keep
the START key pressed longer than 4 seconds the test
continues until the key is released.
TMR mode: The test will take the time set. If you want to stop
the test when it's running, press the START/STOP key again.
START
STOP
AMPROBE
DMIII MULTITEST
EN-23
6.2.2. Results of "MAN" mode
At the end of the test if
the insulation
resistance is lower
than RMAX (see Table2)
and the instrument
generates the
Nominal test Voltage,
the instrument emits a
double beep,
indicating the positive
outcome of the test
and displays a screen
similar to the screen to
the right.
M 05.06.01
Insulation Resistance
1.07 M
514V 15s
MAN 500V
Voltage during the Test
Duration of the Test
Test mode
Test voltage set
FUNC
VNOM
In order to evaluate the test you must compare the result with the limits indicated in the
Guidelines (see Table1).
The displayed result can be stored pressing the SAVE key twice (according to
paragraph 9.1).
If the Insulation
resistance is higher
than RMAX (see Table2),
the instrument emits a
double beep at the end
of the test indicating
the positive outcome
of the test and displays
one screen similar to the
screen to the right.
M 05.06.01
Maximum resistance value
which can be measured
(999 is displayed if a
rated voltage of 500V was
selected, see Table2).
> 999 M
523V 15s
MAN 500V
The symbol ">" means that
the resistance value is
higher than RMAX .
Test duration
FUNC
VNOM
The displayed result can be stored by pressing the SAVE key twice (refer to
paragraph 9.1).
AMPROBE
DMIII MULTITEST
EN-24
6.2.3. Results of "TMR" mode
At the end of the test if
the Insulation
resistance is lower
than RMAX (see Table2)
and the instrument
generated the
Nominal test Voltage,
the instrument emits a
double beep
indicating the positive
outcome of the test
and displays a screen
similar to the screen to
the right.
M 05.06.01
Insulation Resistance
1.07 M
514V 15s
TMR 500V TIME:60s
Voltage during the Test
Duration of the Test
Test mode
FUNC
VNOM
The displayed result can be stored by pressing the SAVE key twice (according to
paragraph 9.1).
If the Insulation
resistance is higher
than RMAX (see Table2),
the instrument emits a
double beep at the end
of the test indicating
the positive outcome
of the test and displays
a screen similar to the
screen to the right.
M 05.06.01
Maximum resistance value
that can be measured
(999 is displayed if a
rated voltage of 500V was
selected, see Table2).
> 999 M
523V 15s
TMR 500V TIME:60s
The symbol ">" means that
the resistance value is
higher than RMAX .
Test duration
FUNC
VNOM
The displayed result can be stored pressing the SAVE key twice (according to
paragraph 9.1).
AMPROBE
DMIII MULTITEST
EN-25
6.2.4. "MAN" and "TIMER" mode faulty cases
If the instrument
detects the External
Power supply adapter
the instrument will
show the message
displayed to the right.
M 05.06.01
-.- -
M
---V 15s
REMOVE POWER
MAN 500V
Disconnect the External
Power Supply Adapter
FUNC
VNOM
If the instrument
detects a Voltage
between the input
terminals higher than
15V, the instrument
does not perform the
test and displays the
screen to the right for
5 seconds.
M 05.06.01
-.-
- M
---V 15s
VOLT IN INPUT
MAN 500V
ATTENTION: the test can't be
executed. Check that the circuit is
not energized.
FUNC
VNOM
This result can't be saved
If the instrument can't
generate the Nominal
Test Voltage it will
emit a long beep and
displays a screen
similar to the screen
to the right.
M 05.06.01
Insulation Resistance
1.17
M
107V 15s
MAN 500V
ATTENTION: the test of
resistance RISO was taken at a
voltage value lower than the
set rated voltage. Low
insulation case. This case
occurs under low insulation
conditions or in the presence of
capacitance on the installation.
FUNC
VNOM
Test Duration
AMPROBE
DMIII MULTITEST
EN-26
The displayed result can be stored by pressing the SAVE key twice (refer to
paragraph 9.1).
6.3. : PHASE SEQUENCE INDICATOR
Turn the rotary knob to the position.
6.3.1. Measurement procedure and results of " " mode
1. Connect the Black, Red and Blue connectors of the split cables to their
corresponding input terminals of the instrument T1, T2, T3.
L1
L3
T1 T2 T3 T4
I1 I2 I3
(V1) (V2) (V3)
(COM)
Instrument connection for Phase Sequence Detection in a 400V three-phase system
2. Press the START key to execute a test.
At the end of the test
the instrument emits a
double beep
indicating that the test
has correctly
terminated and
displays the values to
the right.
LOOP 05.06.01
Phase Sequence OK
123
FRQ=60.0HZ V1-2=115V
V2-3=113V V3-1=114V
OK
Value of the Phase to Phase
Voltage
Working mode
This result can be stored pressing the SAVE key twice (refer to paragraph 9.1).
AMPROBE
DMIII MULTITEST
EN-27
AMPROBE
DMIII MULTITEST
EN-28
6.3.2. Faulty Cases
In the " " mode, if a
Phase-to-Phase voltage
is lower than 100V, the
instrument displays the
screen to the right.
LOOP 05.06.01
-
- -
FRQ =60.0HZ V1-2=111V
V2-3= 0 V V3-1= 0V
LOW VOLTAGE T
PHASE ROTATION
Phase "T2 Voltage is lower
than 100V
In the " " mode, if the
instrument detects two
phases connected
together it displays the
screen to the right.
LOOP 05.06.01
-
- -
FRQ =60.0HZ V1-2=107V
V2-3= 0 V V3-1=107V
PHASE DOUBLED
PHASE ROTATION
Two phases are connected
together.
THE PREVIOUS RESULTS CANNOT BE SAVED.
In the mode, if the
voltage of one or more
phase is too low, one or
more phases has a low
voltage the instrument
will show a screen
similar to the along side
displayed.
LOOP 05.06.01
Phase Sequence not
correct
123
FRQ =60.0HZ V1-2=391V
V2-3= 0V V3-1= 0V
NOT CORRECT
Message “LOW Voltage
Phase T”: means that
Phase T has a low voltage
value. Similar message for
Phase R and S.
AMPROBE
DMIII MULTITEST
EN-30
6.4. GROUND TEST: SOIL RESISTANCE AND RESISTIVITY MEASUREMENTS
Turn the rotary knob to the GROUND TEST position.
The F1 key permits to select one of the following measuring modes (which
can be shown cyclically when pressing the key):
Mode "2-W" (the instrument measures the resistance between 2 points).
Mode "3-W" (the instrument measures the resistance using two auxiliary
earth rods).
Mode "" (the instrument measures the ground resistivity).
ATTENTION
Never disconnect the test leads from the circuit under test when the message
"MEASURING" is displayed
6.4.1. Measurement procedure and results of "2-W"and "3-W" mode
1. Select "2-W" or "3-W" Ground measurement mode by means of the F1 key.
2. Connect the Black, Red, Blue and Yellow cables to the corresponding input terminals
of the instrument T1, T2, T3, T4 (see possible connections in the following pictures).
1
3
N
T1 T2 T3 T4
I1 I2 I3
(V1) (V2) (V3)
(COM)
Connection for 3 point Earth resistance
measurement
11
33
NN
Transf
T1 T2 T3 T4
I1 I2 I3
(V1) (V2) (V3)
(COM)
Connection for 2 point Earth Resistance
measurement
1
3
N
T1 T2 T3 T4
I1 I2 I3
(V1) (V2) (V3)
(COM)
Connection for measuring the resistance between an extraneous conductive part and the earth system
3. Press the START key. The instrument starts the test.
STA R T
STOP
AMPROBE
DMIII MULTITEST
EN-31
At the end of the test
the instrument emits a
double beep indicating
that the test is
correctly terminated
and displays the values
to the right.
EARTH 05.06.01
Ground Resistance value
expressed in .
0.77
Vd= 1V
Test:04
RAVG=0.74
3-W
Voltage value of electrical
noise
Number of Test
Average Value of Ground
Resistance calculated over
the Number of Test
displayed.
FUNC
CLR
"3 Point" Working mode
4. The instrument will show automatically the average value of the Ground resistance
calculate over the tests performed. Press F2 to RESET this value and the number of
Test.
This result can be stored by pressing the SAVE key twice (refer to paragraph 9.1).
AMPROBE
DMIII MULTITEST
EN-32
6.4.2. Measurement procedure and results of "" mode
1. Select measurement mode by means of the F1 key.
2. Select the distance d between the earth rods by means the F3 and F4 keys.
The Distance measuring unit comply with Country setting (see par. 5.4).
3. Connect the 4 Black, Red, Blue and Yellow connectors of the single cables in the
corresponding input terminals of the instrument T1, T2, T3, T4.
dd d d
T1 T2 T3 T4
I1 I2 I3
(V1) (V2) (V3)
(COM)
Instrument connection for Earth resistivity measurement
4. Press the START key. The instrument starts the test.
At the end of the test
the instrument emits a
double beep
indicating that the
test is correctly
terminated and
displays the values to
the right.
EARTH 05.06.01
Ground Resistivity value
expressed in m.
1.77 m
Vd= 1V
Test:04
AVG=0.74
DIST= 2m
Voltage value of electrical
noise
Number of Test
Average Value of Ground
Resistivity calculated over the
Number of Test displayed.
FUNC
CLR
"" Working mode
5. The instrument will show automatically the Average value of the Ground Resistivity
calculate over the tests performed. Press F2 to RESET this value and the number of
Test.
This result can be stored by pressing the SAVE key twice (refer to paragraph 9.1).
STA R T
STOP
AMPROBE
DMIII MULTITEST
EN-33
AMPROBE
DMIII MULTITEST
EN-34
6.4.3. "2-W", "3-W" and "" faulty cases
If the instrument detects
the External Power
supply adapter
connected to instrument
will show the message
displayed to the right.
EARTH 05.06.01
-
- -
Vd= ---V
Test:04
RAVG=0.74
REMOVE POWER
3-W
Disconnect the External
Power Supply Adapter
FUNC
CLR
If the Instrument detect
a voltage values higher
than 5V the instrument
will shows the screen
displayed to the right.
EARTH 05.06.01
Warning symbol: Voltage
noise in input.
-
- -
Vd= 230V
Test:04
RAVG=0.74
VOLT IN INPUT
3-W
FUNC
CLR
The message "Rc
high" indicates that the
instrument can't
produce the minimum
current necessary for
measurement. Check
that the terminals are
correctly connected
and the Auxiliary earth
rod connected to T4
(yellow conductor) has
not been inserted in a
pebbly or poorly
conductive ground. If
necessary pour some
water around the rod.
EARTH 05.06.01
-
- -
Vd= 1V
Test:04
RAVG=0.74
Rc HIGH
3-W
Message "Rc": Check
Auxiliary Earth rods.
FUNC
CLR
AMPROBE
DMIII MULTITEST
EN-35
THE PREVIOUS RESULTS CANNOT BE SAVED.
If the Instrument
detects a Resistance
value higher than
1999, the instrument
will show the screen to
the right.
EARTH 05.06.01
Message ">1999" means that
the resistance value is higher
than the maximum
measurable.
> 1999
Vd= 1V
Test:04
RAVG=0.74
3-W
FUNC
CLR
This result can be stored pressing the SAVE key twice (refer to paragraph 9.1).
If the Instrument
detects a Resistivity
value higher than
1999km, the
instrument will show
the screen to the right.
EARTH 05.06.01
Message ">1999" means that
the resistivity value is higher
than the maximum
measurable.
>
1999km
Vd= 1V
Test:04
AVG=0.74km
DIST=5m
FUNC
CLR
This result can be stored pressing the SAVE key twice (refer to paragraph 9.1).
AMPROBE
DMIII MULTITEST
EN-36
7. POWER QUALITY
This function allows the following operations:
display in real time the electrical parameters of a single phase system or a three
phase system (with and without neutral wire) and the harmonic analysis of voltage and
current.
conduct a direct Energy measurement (without memorizing).
memorize (pressing SAVE key) the sampled values of the Parameters present at
instrument input generating a "Smp" record inside instrument memory. It will be
possible to analyse the memorized data ONLY by transferring it to a PC.
record simultaneously (pressing the START key after a proper setting): RMS values
of voltage, current, corresponding harmonics, active, reactive and apparent powers,
power factors and cos, active, reactive and apparent energies, voltage anomalies
(voltage sag and surge) with 10ms resolution. It will be possible to analyse the
recorded data ONLY by transferring them to a PC.
It's fundamental the Instrument settings correspond to the Installation type under test and
accessories is use. For this we recommend you to check instrument's setting before
execute an ANALYSIS measurement.
Select the POWER QUALITY rotary switch position. By pressing the MENU key the
following screen will be displayed:
MENU GENERAL
SAFETY TEST MEMORY
ANALYZER MEMORY
RESET
ANALYZER CONFIG
RECORDER CONFIG
CONTRAST
DATE&TIME
LANGUAGE
COUNTRY
It’s not possible to enter the MENU during a recording or a Real Time Energy
measurement.
Generally to check instrument's settings you must check "ANALYZER CONFIG" and
"RECORDER CONFIG" items.
AMPROBE
DMIII MULTITEST
EN-37
7.1. BASIC SETTING: ANALYZER CONFIG
Place the rotary switch in the POWER QUALITY position, press the MENU key, using the
F1/F2 keys select the ANALYZER CONFIG item and press the ENTER Key.
The following page will be displayed:
ANALYZER CONFIG
SYSTEM :3PH4W
FREQUENCY:60HZ
CURRENT RANGE:1000A
CLAMP TYPE: FlexINT
TV RATIO:0001
PASSWORD:OFF
+
-
This page of setting can be confirmed by pressing the ENTER key or cancelled by
pressing the ESC key.
7.1.1. Type of electrical system under test
This parameter allows to select the type of electrical system under test among the
following configurations:
SINGLE: single-phase system
3PH3W: 3-wire system (three-phase system without neutral)
3PH4W: 4-wire system (three-phase system with neutral)
The connections to the instrument inputs will have to comply with the selected type of
system.
Position the cursor on the corresponding word by pressing the multifunction keys F1 and
F2 and set the desired value by pressing the multifunction keys F3 and F4.
7.1.2. How to set the fundamental frequency
Position the cursor on the corresponding word by pressing the multifunction keys F1 and
F2 and select the network frequency between the possible values 50Hz and 60Hz by
pressing the multifunction keys F3 and F4. This parameter is important ONLY if the input
voltage is not sufficient to recognise the value of the frequency (for example, only the
clamps for the current measurement are connected). In this case the instrument generates
an internal synchronism equal to the value of the set frequency.
AMPROBE
DMIII MULTITEST
EN-38
7.1.3. How to set the Clamp Type
The value of this parameter must be always equal to the type of clamp being used.
Three types of clamps are available:
STD: STANDARD clamps or current transformers
FlexEXT: FLEXIBLE clamps with EXTERNAL power supply.
FlexINT: FLEXIBLE clamps AM-Flex33 (coils directly connected to the
instrument inputs). These clamps allow 1000A and 3000A range.
Set the desired value by pressing the multifunction keys F3 and F4.
7.1.4. How to set the current range
Position the cursor on the corresponding word by pressing the multifunction keys F1 and
F2 and set the desired value by pressing the multifunction keys F3 and F4.
For STD and FlexEXT the value of this parameter must be always equal to the full scale
of the current clamp used to take the measurement. In case multi-scale clamp is used,
the value of this parameter must be equal to the scale selected on the clamp.
For FlexINT (AM-Flex33) only two ranges are available: 1000A and 3000A.
7.1.5. How to set the value of the transformer voltage ratio (TV RATIO)
The instrument can also be interfaced with step-down transformers in the equipment under
test: it can display the value of he voltages present on the primary winding of these
transformers. To do this it will be necessary to set the value of the transformers’ windings
ratio from 2:1 to 3000:1. The default is set at 1:1 for measurements of none transformer
systems.
Select “TV RATIO” in the ANALYZER CONFIG menu. Set the desired value by pressing
the multifunction keys F3 and F4.
7.1.6. How to enable/disable the password
The instrument is provided with a protective routine to avoid the risk of being disturbed or
interrupted during a recording or an energy measurement. Once a recording or a direct
energy measurement has been started (with the option “PASSWORD” enabled), after
about 3 minutes from the last key pressure or switch rotation it won’t be possible to press
START/STOP to stop the recording, “PASSWORD” will be displayed and it will be
necessary to insert the password.
In order to insert the password (which is not changeable), press the multifunction keys in
the following sequence (within 10 seconds):
F1, F4, F3, F2
If you wait more than about 10 seconds the display will return to the meter mode and the
instrument will continue recording. If you insert a wrong password the message “Password
error” will be displayed under “PASSWORD”. After a few seconds the display will return to
meter mode and the instrument will continue recording. In order to enable/disable this
option the correct password will have to be entered. The display will return to meter mode
and START/STOP will have to be pressed again to stop the recording. You will then need
to re-enter the “ANALYZER CONFIG” menu and scroll up or down to the item
“PASSWORD: ON” using the multifunction keys F1 and F2. Then turn the password off by
pressing the multifunction keys F3 and F4.
AMPROBE
DMIII MULTITEST
EN-39
7.2. BASIC SETTING: RECORDER CONFIG
Place the rotary switch in the POWER QUALITY position, press the MENU key, using the
F1/F2 keys select the RECORDER CONFIG item and press the ENTER Key.
This option allows you to check and eventually modify the recording parameters and the
selected parameters (up to a maximum of 62+Frequency). If the number of selected
values exceeds 63 the message "too many param" will be displayed. The RECORDER
CONFIG mode is divided into 4 separate sub-pages:
1st page: This page allows you to set the START/ STOP mode (AUTO or MANUAL),
the START and STOP time if AUTO mode is selected, the Integration
Period value, the Enabling/Disabling of Voltage Anomalies detection, the
Enabling/Disabling of Harmonics detection. Press ENTER to confirm the
settings and pass to the following page.
Press ESC to leave the Menu without modifying the existing parameters.
2nd page: This page is devoted to the settings relevant to the VOLTAGE recording.
Press ENTER to confirm the settings and pass to the following page.
Press ESC to leave this page without modifying the existing parameters.
From this page you can enter the sub-page “Harmonics” which permits to
select the voltage harmonics to be recorded.
Press ENTER to confirm the settings and leave the “Menu Harmonics".
Press ESC to leave the "Menu Harmonics" without modifying the existing
parameters.
3rd page: This page is devoted to the settings relevant to the CURRENT recording.
Press ENTER to confirm the settings and pass to the following page.
Press ESC to leave this page without modifying the existing parameters.
From this page you can enter the sub-page “Harmonics” which permits to
select the current harmonics to be recorded.
Press ENTER to confirm the settings and leave the “Menu Harmonics".
Press ESC to leave the "Menu Harmonics" without modifying the existing
parameters.
4th page: Menu composed of two sub-pages devoted to the selection of the
POWERS and ENERGIES to be recorded. From this page you can enter
the sub-page “POWER” and “ENERGY” which permits to select the
parameters to be recorded.
Selecting the active powers for the recording, the corresponding active
energies will be automatically selected.
Selecting the reactive powers for the recording, the corresponding reactive
energies will be selected.
Press ENTER to leave this page confirming the modifications made.
Press ESC to leave the "Menu" without modifying the existing parameters.
The various pages of the "RECORDER CONFIG" can be schematised as follows:
AMPROBE
DMIII MULTITEST
EN-40
1st Page of the RECORDER
CONFIG MENU
Example of 2nd page with ANOM
flag enabled
Example of sub-page
"VOLTAGE HARMONICS"
RECORDER CONFIG
START
MANU
STOP
MANU
INT. PERIOD: 15min
HARM REC: ON
ANOM REC: ON
+
-
ENTER
RECORDER CONFIG
VOLTAGE HARMONICS
Thd DC 01 02 03 04
05 06 07 08 09 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30 31 32
33 34 35 36 37 38 39
40 41 42 43 44 45 46
47 48 49
+
-
Use the multifunction keys F1, F2
to position the cursor on the
desired word and use the
multifunction keys F3 / F4 to modify
the value.
Press ENTER to confirm this page
and proceed inside the Menu the
Menu keeping the settings made.
Press ESC to leave this page
without modifying the existing
parameters.
Use the multifunction keys F1,
F2 to position the cursor on the
desired voltage harmonic and
use the multifunction keys F3 /
F4 to select / deselect (it’s
selected if highlighted in
black).
Press ENTER to confirm this
page.
Press ESC to leave the Menu
without modifying the existing
settings.
The instrument will record the
values of the selected
harmonics corresponding to
the voltages selected in one of
the two pages of the Menu
previously illustrated.
ENTER
MENU
To Select MANUAL or AUTOMATIC
start/stop mode, place the cursor on
MANU or AUTO using the
multifunction key F1 or F2 and select
the desired mode using F3 or F4.
If you want to change Voltage Harm. Selection place the
cursor on the corresponding “Pg” symbol then Press F3
Use the multifunction keys
F1, F2 to position the cursor
on the desired symbol and
use the multifunction keys
F3 / F4 to select / deselect
the desired parameter (it’s
selected if marked in black).
Press ENTER to confirm and
leave the Menu keeping the
settings made.
Press ESC to leave this
page without modifying the
existing parameters.
RECORDER CONFIG
VOLTAGE:
V1 V2 V3
V12 V23 V31
HARM. REC:Pg (ON)
Vref P-N: 110V
LIM+: 06% (116.6V)
LIM-: 10% (99.0V)
+
-
AMPROBE
DMIII MULTITEST
EN-41
Example of 3rd page
Example of sub-page
"CURRENT HARMONICS"
ENTER
RECORDER CONFIG
CURRENT HARMONICS
Thd DC 01 02 03 04
05 06 07 08 09 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30 31 32
33 34 35 36 37 38 39
40 41 42 43 44 45 46
47 48 49
+
-
Use the multifunction keys F1,
F2 to position the cursor on the
desired current harmonic and
use the multifunction keys F3 /
F4 to select / deselect (it’s
selected if marked in black).
Press ENTER to confirm this
page.
Press ESC to leave this page
without modifying the existing
settings.
The instrument will record the
values of the selected harmonics
corresponding to the currents
selected in one of the two pages
of the Menu previously
illustrated.
ENTER
From 2nd page
of RECORDER CONFIG MENU
Use the multifunction keys
F1, F2 to position the
cursor on the desired
word and use the
multifunction keys F3 / F4
to modify the value or
select / deselect the
desired parameter (it’s
selected if marked in
black).
Press ENTER to confirm.
Press ESC to leave the
Menu without modifying
the existing settings.
If you want to change Current Harm. Selection place
Cursor on the corresponding “Pg” symbol then Press F3
RECORDER CONFIG
CURRENT:
I1 I2 I3 IN
HARM. REC:Pg (ON)
+
-
AMPROBE
DMIII MULTITEST
EN-42
Example of 4th page
Example of POWER sub-page
Selecting the active powers for the recording, the corresponding active energies will be
automatically selected.
Selecting the reactive powers for the recording, the corresponding reactive energies will be
selected.
RECORDER CONFIG
CO-GENERATION:ON
POWER:Pg
ENERGY:Pg
+
-
ENTER
From 3rd page
of RECORDER CONFIG MENU
ENTER
In order to select the POWER to be recorded use the
multifunction keys F1, F2 to position the cursor on the
corresponding “Pg” Symbol and then press F3
RECORDER CONFIG
Pt P1 P2 P3
Qti Q1i Q2i Q3i
Qtc Q1c Q2c Q3c
St S1 S2 S3
Pft Pf1 Pf2 Pf3
dPft dPf1 dPf2 dPf3
+
-
AMPROBE
DMIII MULTITEST
EN-43
Example of 4th page
Example of ENERGY sub-page
in single-phase mode
Selecting/deselecting the active energies for the recording, the corresponding active powers will
be automatically selected/deselected.
Selecting/deselecting the reactive energies for the recording, the corresponding reactive powers
will be selected/deselected
Selecting/deselecting the reactive energies for the recording, the corresponding reactive powers
will be selected/deselected.
RECORDER CONFIG
CO-GENERATION:ON
POWER:Pg
ENERGY:Pg
+
-
ENTER
From 3rd page
of RECORDER CONFIG MENU
ENTER
In order to select the ENERGIES to be recorded use the
multifunction keys F1, F2 to position the cursor on the
corresponding “Pg” Symbol and then press F3
RECORDER CONFIG
Eat Ea1 Ea2 Ea3
Erit Eri1 Eri2 Eri3
Erct Erc1 Erc2 Erc3
Est Es1 Es2 Es3
+
-
AMPROBE
DMIII MULTITEST
EN-44
Symbols
Description
Advised settings
START:MAN
The recording of all the selected parameters will start at 00
seconds after pressing START/STOP (see paragraph 10).
STOP:MAN
The recording of all the selected parameters will be interrupted
manually by pressing START/STOP (see paragraph 10).
START:AUTO
STOP:AUTO
The recording of all the selected values will be started /
interrupted at the set dates and times. In order to start the
recording the user will have to press START/STOP to set the
instrument in Stand-by mode until the start date and time
previously set (see paragraph 10).
INT. PERIOD
The value of this parameter determines how many seconds
the values of all the selected parameters will be memorized.
Available choices:
5sec, 10sec, 30sec, 1min, 2min 5min, 10min, 15min, 60min.
15min
HARM REC.
ON = the instrument will record the values of the selected
voltage and current harmonics corresponding to the
voltages and currents selected in the corresponding
pages “Voltage” and “Current”.
Example: If the following Parameters are selected:
a) Phase Voltage 1 and 2, Thd, Harmonics 1,3,5.
b) Phase Current 2 and 3, Thd, Harmonics 3,5,7.
The instrument will record:
a) The Phase Voltage 1 and 2, Thd and Harmonics 1,3,5
of the Phase Voltage 1 and 2 while it will not record
anything about Phase Voltage 3
b) The Phase Current 2 and 3, Thd and Harmonics 3,5,7
of the Phase Current 2 and 3 while it will not record
nothing about Phase Current 1
OFF = the instrument will not record any voltage or current
harmonic selected
ANOM REC.
ON = the Instrument will record Voltage Sag and Surge (see
paragraph 16.6)
OFF = the instrument will not record any voltage Sag and
Surge
V1, V2, V3
V12, V23 or V32,
V31
RMS value of the voltage of phase 1, phase 2, phase 3
respectively, values of the phase-to-phase voltages 1-2, 2-3 or
3-2 and 3-1.
Single phase: V1
3 wires V12 V32 V31
4 wires V1, V2, V3
Thd, DC, 01...49
Voltage Total Harmonic Distortion, DC Component, 01..49
Harmonics respectively
Thd,01,03,05,07
Vref
(only if ANOM. REC
flag has been set
ON)
RMS reference value for Voltage used in Voltage Anomalies
detection (Voltage Sag and Surge). The Reference is:
a) Voltage Phase to Neutral for Single Phase and 4 wires
three phase system
b) Voltage Phase to Phase for 3 wires three phase system
Single phase: 110V
3 wires: 480V
4 wires 277V
LIM+, LIM-
(only if ANOM. REC
flag has been set
ON)
High and Low Voltage Percent threshold used in Voltage
Anomalies detection (Voltage Sag and Surge).
Example: Three Phase System 4 wires.
Vref = 110, LIM+= 6%, LIM-=10% =>
High Lim = 121.0V, Low Lim = 99.0V
The Instrument will detect a voltage Anomalies if the RMS
Voltage Values (calculated every 10ms) beyond the above
calculated thresholds (see paragraph 16.6).
+6% / -10%
I1, I2, I3, IN
RMS value of the current of phase 1, phase 2, phase 3 and of
the neutral respectively.
Single phase: I1
3 wires: I1, I2, I3
4 wires I1, I2, I3, IN
Thd, DC, 01..49
Current Total Harmonic Distortion, DC Component, 01..49
Harmonics respectively
Thd,01,03,05,07
AMPROBE
DMIII MULTITEST
EN-45
CO-GENERATION
ON = the instrument is able to face situations of CO-
GENERATION of electrical equipment (that is, the
equipment under test is able to generate energy besides
absorbing it). Accordingly, the instrument will record the
powers and energies both absorbed and generated (see
paragraph 16.8.1). If this flag is enabled the maximum
number of parameters which can be selected decrease
to 38.
OFF = the instrument will record ONLY the powers and
energies absorbed.
Pt, P1, P2, P3,
P12, P32
Values of the active power (total, of phase1, phase2 and phase3)
(only for 3 wires measurement) value of the power measured
by the Wattmeter 1-2 and 3-2 respectively
Single phase: P1
3 wires: Pt
4 wires Pt, P1, P2, P3
Qti, Q1i, Q2i, Q3i,
Q12i, Q32i
Values of the inductive reactive power (total, of phase 1,
phase 2, phase 3)
(only for 3 wires measurement) value of the reactive inductive
power measured by the VAR meters 1-2 and 3-2 respectively
Single phase: Q1i Q1c
3 wires: Qti Qtc
4 wires Qti Q1i Q2i,
Q3i
Qtc Q1c Q2c, Q3c
Qtc, Q1c, Q2c, Q3c,
Q12c, Q32c
Values of the capacitive reactive power (total, of phase 1,
phase 2, phase 3)
(only for 3 wires measurement) value of the reactive capacitive
power measured by the VA meters 1-2 and 3-2 respectively
St, S1, S2, S3, S12,
S32
Values of the apparent power (total, of phase1, phase2,
phase3)
(only for 3 wires measurement) value of the power measured
by the VA meters 1-2 and 3-2 respectively
Single phase: S1
3 wires: St
4 wires St, S1, S2, S3
Pft, Pf1, Pf2, Pf3
Values of the power factors (total, of phase 1, phase 2 and
phase 3 respectively)
Single phase: Pf1 dPf1
3w: Pft dPft
4w: Pft Pf1 Pf2 Pf3
dPft dPf1 dPf2 dPf3
dpft, dpf1, dpf2, dpf3
Values of the cos (total, of phase 1, phase 2 and phase 3
respectively)
Eat, Ea1, Ea2, Ea3
Values of the active energy (total, of phase1, phase2 and
phase3)
Single phase: Ea1
3 wires: Eat
4 wires Eat Ea1 Ea2
Ea3
Erit, Eri1, Eri2, Eri3
Values of the inductive reactive energy (total, of phase 1,
phase 2 and phase 3)
Single phase: Eri1
Erc1
3 wires: Erit Erct
4 wires Erit Eri1 Eri2
Eri3 Erct Erc1 Erc2
Erc3
Erct, Erc1, Erc2, Erc3
Values of the capacitive reactive energy (total, of phase 1,
phase 2, phase 3)
Est, Es1, Es2, Es3
Values of the Apparent Energy (total, of phase1, phase2 and
phase3)
Single phase: Es1
3 wires: Est
4 wires Est Es1 Es2
Es3
The value of the network frequency is automatically selected if at least one phase voltage (for the
single-phase mode or the 4 wires three phase mode) or at least one phase-to-phase voltage (for the 3
wires three phase mode) is selected.
The symbols "i" and "c" stand for reactive powers (Q), power factors (Pf) and cos (dpf) inductive and
capacitive respectively.
Selecting a power factor (Pf) or a cos (dPf) for the recording automatically their inductive value and their
capacitive value will be recorded separately.
For eventual messages displayed see appendix 1 – MESSAGES DISPLAYED.
AMPROBE
DMIII MULTITEST
EN-46
7.3. POWER QUALITY FUNCTIONS
For a simple usage, the main working mode of the POWER QUALITY function
can be selected by means of F3 and F4.
"VOLTAGE" function: to be used to display voltages and corresponding
harmonics (see paragraph 7.4)
"CURRENT" function: to be used to display currens and corresponding
harmonics (see paragraph 7.5)
"POWER" function: it permits to display all the parameters measurable by
the instrument: voltages, currents, active, reactive and
apparent powers, power factors, cos and energies (see
paragraph 7.6)
"ENERGY" function: to be used to display active, reactive and apparent power,
power factor, cos and energy (see paragraph 7.7)
More practically, we may schematise the right procedure of use the POWER QUALITY
function as follows:
1. Check and eventually modify the "ANALYZER CONFIG" settings of the instrument
2. Using F3 and F4, select the type of measurement to be taken
3. Connect the instrument to the electrical system to be tested
4. Evaluate the values of the parameters under test
5. If you want to record:
a) Decide what to record
b) Press MENU and check if the "RECORDER CONFIG" settings meet your
requirements
6. Connect the External Power Supply adapter.
7. Start the recording by pressing START/STOP.
AMPROBE
DMIII MULTITEST
EN-47
7.4. "VOLTAGE" FUNCTION
This function permits to display in real time the RMS value of AC/DC voltage, the peak and
Thd values of the 3 phase voltages, the waveform and the harmonic spectrum of the 3
phase voltages.
7.4.1. Symbols
The VOLTAGE position has three working modes:
METER
WAVE
HARM
These modes will be described in detail in the next paragraphs. The used symbols are
described below:
Symbol
Description
V1, V2, V3
RMS value of voltage (phase 1, phase 2, phase 3 respectively)
V12, V23 or V32,
V31
RMS value of phase to phase voltage
Vpk1, Vpk2, Vpk3,
Vpk12, Vpk32
peak value of voltage (phase 1, phase 2, phase 3 and phase-to-
phase voltage 12 and 32 respectively)
h01 h49
Harmonic 01 Harmonic 49
ThdV
Factor of total harmonic distortion of voltage
freq
Network frequency
Phseq
Phase sequence indicator
"123" correct
"132" inverted
"023" null voltage on black wire
"103" null voltage on red wire
"120" null voltage on blue wire
"100" null voltages on red and blue wires
"020" null voltages on black and blue wires
"003" null voltages on black and red wires
Tab. 1: Symbols used in VOLTAGE function
AMPROBE
DMIII MULTITEST
EN-48
7.4.2. "METER" mode
By selecting this function the instrument selects automatically the METER mode
corresponding to one of the screens below according to the settings made as per
paragraph 7.1.
27.09.00 17:35:12
27.09.00 17:35:12
27.09.00 17:35:12
SINGLE PHASE
VOLTAGE
V1 = 230.2 V
Vpk1 = 325.5 V
ThdV = 0.0 %
freq = 50.0 Hz
VOLTAGE
V12 = 384.2 V
V32 = 385.4 V
V31 = 383.7 V
freq = 50.0 Hz
VOLTAGE
V1 = 230.2 V
V2 = 230.5 V
V3 = 230.6 V
V12 = 384.2 V
V23 = 385.4 V
V31 = 383.7 V
freq = 50.0 Hz
Phseq = 123
HARM.
WAVE
PG-
PG+
HARM.
WAVE
PG-
PG+
HARM.
WAVE
PG-
PG+
Example of screen in
single-phase mode
Example of screen in “3-
wire” three-phase mode
Example of screen in “4-
wire” three-phase mode
The symbols used are described in Tab. 1.
For eventual messages displayed see appendix 1 – MESSAGES DISPLAYED.
Following keys are active:
F1: to pass to "HARMONIC" mode (see paragraph 7.4.3)
F2: to pass to "WAVE" mode (see paragraph 7.4.4)
F3/F4: to pass to previous/next function respectively
SAVE: to save in the instrument memory a record of “Smp” type containing
the instantaneous values of voltage and current present at the
instrument inputs. This function is disabled during a recording
ENTER/HOLD: to enable/disable the HOLD function (updating interruption) of
displayed data. All previous functions remain however available.
When the HOLD function is activated, the word HOLD is displayed.
When this function is enabled it’s not possible to record nor perform
energy measurements. This function is disabled during a recording or
an energy measurement
MENU: to enter the MENU mode and change the instrument settings (see
paragraph 7.1 and 7.2). It’s not possible to enter the configuration
MENU during a recording or an energy measurement
START/STOP: to record selected parameters according to the instrument’s settings
AMPROBE
DMIII MULTITEST
EN-49
7.4.3. "HARM" mode
By selecting the HARM mode one of the screens below will be displayed according to the
settings made. The screens show the harmonics of the phase or phase-to-phase voltage.
Example of screen in
single-phase system
Example of screen in “3-
wire” three-phase system
Example of screen in “4-
wire” three-phase system
The symbols used are described in Tab. 1.
For eventual messages displayed see appendix 1 – MESSAGES DISPLAYED.
The displayed histograms represent the harmonic content of the voltage under test. The
value of the first harmonic h01 (fundamental at 50Hz) is not represented in scale along
with the other harmonics in order to maximize the display of the latter. In case both voltage
and current are connected to the instrument inputs, eventual negative values of harmonics
(therefore represented under the horizontal axis), indicate that such voltage harmonics are
“generated” by the load.
Following keys are active:
F3, F4: to move the cursor of the selected harmonic leftwards and rightwards
respectively. At the same time the values related to the order no. of
the selected harmonic and to the corresponding absolute and relative
values (calculated on the basis of the fundamental) are updated
F1 (only for three-phase mode): to display the values of the harmonics of
the other voltages available. The voltage displayed is indicated above
the F3 key
F2: to display the page of the harmonics h01 h24 (symbol h24) or the
page of the harmonics h25 h49 (symbol h49)
ESC: to return back to METER mode (see paragraph 7.4.2)
SAVE: to save in the instrument memory a record of “Smp” type and the
instantaneous values of voltage and current present at the instrument
inputs. This function is disabled during a recording
ENTER/HOLD: to enable/disable the HOLD function (updating interruption) of
displayed data. All previous functions remain however available. When
the HOLD function is activated, the word HOLD is displayed. When
this function is enabled it’s not possible to record nor perform energy
27.09.00
17:35:12
V1 = 230.2 V
h03 = 10.2 V
h03 = 4.3 %
ThdV = 11.0 %
h49
27.09.00
17:35:12
V12 = 400.2 V
h03 = 14.2 V
h03 = 3.5 %
ThdV = 11.0 %
ChgP
h49
27.09.00
17:35:12
V1 = 230.2 V
h03 = 10.2 V
h03 = 4.3 %
ThdV = 11.0 %
ChgP
h49
AMPROBE
DMIII MULTITEST
EN-50
measurements. This function is disabled during a recording or an
energy measurement
MENU: to enter the MENU mode and change the instrument settings (see
paragraph 7.1 and 7.2). It’s not possible to enter the configuration
MENU during a recording or an energy measurement
START/STOP: to record selected parameters according to the instrument’s settings
AMPROBE
DMIII MULTITEST
EN-51
7.4.4. "WAVE" mode
By selecting the WAVE mode one of the screens below will be displayed according to the
settings made as per paragraph 7.1. The screens show the waveform of the phase or
phase-to-phase voltage.
Example of screen in
single-phase system
Example of screen in “3-
wire” three-phase system
Example of screen in “4-
wire” three-phase system
The symbols used are described in Tab. 1.
For eventual messages displayed see appendix 1 – MESSAGES DISPLAYED.
Following keys are active:
F1: (only for three-phase mode): to display the values corresponding to
the following phase
ESC: to return back to METER mode (see paragraph 7.4.2)
SAVE: to save in the instrument memory a record of “Smp” type containing
the instantaneous values of voltage and current present at the
instrument inputs. This function is disabled during a recording
ENTER/HOLD: to enable/disable the HOLD function (updating interruption) of
displayed data. All previous functions remain however available.
When the HOLD function is activated, the word HOLD is displayed.
When this function is enabled it’s not possible to record nor perform
energy measurements. This function is disabled during a recording or
an energy measurement
MENU: to enter the MENU mode and change the instrument settings (see
paragraph 7.1 and 7.2). It’s not possible to enter the configuration
MENU during a recording or an energy measurement
START/STOP: to record selected parameters according to the instrument’s settings
27.09.00 17:35:12
V1 = 230.2 V
Vpk1 = 325.5 V
freq = 50.0 Hz
V
=
27.09.00 17:35:12
5:12
V12 = 400.2 V
Vpk12= 565.5 V
freq = 50.0 Hz
ChgP
27.09.00 17:35:12
V1 = 230.2 V
Vpk1 = 325.5 V
freq = 50.0 Hz
ChgP
AMPROBE
DMIII MULTITEST
EN-52
7.5. "CURRENT" FUNCTION
This function permits to display in real time the RMS value of AC/DC currents, the peak
and Thdl value of the 3 phase currents, the waveform and the harmonic spectrum of the 3
phase currents.
7.5.1. Symbols
The CURRENT position has three working modes:
METER
WAVE
HARM
These modes will be described in detail in the next paragraphs.
The symbols used are described below:
Symbol
Description
I1, I2, I3
RMS value of current (phase 1, phase 2, phase 3 respectively)
IN
RMS value of current on neutral
Ipk1, Ipk2, Ipk3
Peak value of current (phase 1, phase 2, phase 3 respectively)
h01 h49
Harmonic 01 harmonic 49
ThdI
Total harmonic distortion factor of current
freq
Network frequency
Tab. 2: Symbols used in the CURRENT function
AMPROBE
DMIII MULTITEST
EN-53
7.5.2. “METER" mode
By selecting this function the instrument selects automatically the METER mode
corresponding to one of the screens below according to the settings made as per
paragraph 7.1.
27.09.00 17:35:12
27.09.00 17:35:12
27.09.00 17:35:12
SINGLE PHASE
CURRENT
I1 = 30.21 A
Ipk1 = 49.53 A
ThdI = 23.06 %
freq = 50.0 Hz
CURRENT
I1 = 30.21 A
I2 = 23.53 A
I3 = 23.06 A
freq = 50.0 Hz
CURRENT
I1 = 30.21 A
I2 = 23.53 A
I3 = 23.06 A
IN = 8.4 A
freq = 50.0 Hz
HARM.
WAVE
PG-
PG+
HARM.
WAVE
PG-
PG+
HARM.
WAVE
PG-
PG+
Example of screen in
single-phase mode
Example of screen in “3-
wire” three-phase mode
Example of screen in “4-
wire” three-phase mode
The symbols used are described in Tab. 2.
For eventual messages displayed see appendix 1 – MESSAGES DISPLAYED.
Following keys are active:
F1: to pass to "HARMONIC" mode (see paragraph 7.5.3)
F2: to pass to "WAVE" mode (see paragraph 7.5.4)
F3/F4: to pass to previous/next function respectively
SAVE: to save in the instrument memory a record of “Smp” type containing
the instantaneous values of voltage and current present at the
instrument inputs. This function is disabled during a recording
ENTER/HOLD: to enable/disable the HOLD function (updating interruption) of
displayed data. All previous functions remain however available. When
the HOLD function is activated, the word HOLD is displayed. When
this function is enabled it’s not possible to record nor perform energy
measurements. This function is disabled during a recording or an
energy measurement.
MENU: to enter the MENU mode and change the instrument settings (see
paragraph 7.1 and 7.2). It’s not possible to enter the configuration
MENU during a recording or an energy measurement
START/STOP: to record selected parameters according to the instrument’s settings
AMPROBE
DMIII MULTITEST
EN-54
7.5.3. “HARM" mode
By selecting the HARM mode one of the screens below will be displayed according to the
settings made. The screens show the harmonics of the phase currents.
Example of screen in
single-phase mode
Example of screen in “3-
wire” or “4-wire” three-
phase mode
The symbols used are described in Tab. 2.
For eventual messages displayed see appendix 1 – MESSAGES DISPLAYED.
The displayed histograms represent the harmonic content of the current under test. The
value of the first harmonic h01 (primary at 50Hz) is not represented in scale along with the
other harmonics in order to maximise the display of the latter. In case both voltage and
current are connected to the instrument inputs, eventual negative values (therefore
represented under the horizontal axis), indicate that such current harmonics are
“generated” by the load.
Following keys are active:
F3, F4: to move the cursor of the selected harmonic leftwards and rightwards
respectively. At the same time the values related to the order no. of
the selected harmonic and to the corresponding absolute and relative
values (calculated on the basis of the fundamental) are updated
F1 (only for three-phase mode): to display the values of the harmonics of
the other voltages available. The voltage displayed is indicated above
the F3 key
F2: to display the page of the harmonics h01 h24 (h24 symbol) or the
page of the harmonics h25 h49 (h49 symbol)
ESC: to return back to METER mode (see paragraph 7.5.2)
SAVE: to store in the instrument memory a record of “Smp” type and the
instantaneous values of voltage and current present at the instrument
inputs. This function is disabled during a recording
ENTER/HOLD: to enable/disable the HOLD function (updating interruption) of
displayed data. All previous functions remain however available. When
the HOLD function is activated, the word HOLD is displayed. When
27.09.00 17:35:12
I1 = 230.2 A
h03 = 10.2 A
h03 = 4.3 %
ThdI = 11.0 %
h49
27.09.00 17:35:12
I1 = 230.2 A
h03 = 10.2 A
h03 = 4.3 %
ThdI = 11.0 %
ChgP
h49
AMPROBE
DMIII MULTITEST
EN-55
this function is enabled it’s not possible to record nor perform energy
measurements. This function is disabled during a recording or an
energy measurement
MENU: to enter the MENU mode and change the instrument settings (see
paragraph 7.1 and 7.2). It’s not possible to enter the configuration
MENU during a recording or an energy measurement
START/STOP: to record selected parameters according to the instrument’s settings
AMPROBE
DMIII MULTITEST
EN-56
7.5.4. "WAVE" mode
By selecting the WAVE mode one of the screens below will be displayed according to the
settings made. The screens show the waveform of the phase currents.
Example of screen in
single-phase mode
Example of screen in “3-
wire” or “4-wire” three-
phase mode
The symbols used are described in Tab. 2.
For eventual messages displayed see appendix 1 – MESSAGES DISPLAYED.
Following keys are active:
F1: (only for three-phase mode): to display the values related to the
following phase
ESC: to return back to METER mode (see paragraph 7.5.2)
SAVE: to save in the instrument memory a record of “Smp” type containing
the instantaneous values of voltage and current present at the
instrument inputs. This function is disabled during a recording
ENTER/HOLD: to enable/disable the HOLD function (updating interruption) of
displayed data. All previous functions remain however available. When
the HOLD function is activated, the word HOLD is displayed. When
this function is enabled it’s not possible to record nor perform energy
measurements. This function is disabled during a recording or an
energy measurement
MENU: to enter in the MENU mode and change the instrument settings (see
paragraph 7.1 and 7.2). It’s not possible to enter the configuration
MENU during a recording or an energy measurement
START/STOP: to record selected parameters according to the instrument’s settings
27.09.00 17:35:12
I1 = 230.2 A
Ipk1 = 325.5 A
freq = 50.0 Hz
27.09.00 17:35:12
I2 = 400.2 A
Ipk2 = 565.5 A
freq = 50.0 Hz
ChgP
AMPROBE
DMIII MULTITEST
EN-57
7.6. "POWER" FUNCTION
This function permits to display in real time the RMS value of AC/DC voltage, the peak and
ThdV value of the 3 phase voltages, the waveform of the 3 phase voltages, the RMS value
of AC/DC currents, the peak and Thdl of the 3 phase currents and the waveform of the 3
phase currents. Furthermore, the instrument calculates and displays the value of phase
and total active powers, the value of phase and total reactive and capacitive powers, the
value of phase and total power factors and cos.
7.6.1. Symbols
The position POWER has two working modes:
METER
WAVE
For voltage and current harmonics see paragraphs 7.4.3 and 7.5.3 respectively.
These modes will be described in detail in the next paragraphs.
The symbols used are described below:
Symbol
Description
V1, V2, V3
RMS value of voltage (phase 1, phase 2, phase 3 respectively)
V12, V23, V32, V31
RMS value of phase to phase voltages
freq
Network frequency
Phseq
Phase sequence indicator
"123" correct
"132" inverted
"023" null voltage on black wire
"103" null voltage on red wire
"120" null voltage on blue wire
"100" null voltages on red and blue wires
"020" null voltages on black and blue wires
"003" null voltages on black and red wires
I1, I2, I3
RMS value of current (phase 1, phase 2, phase 3 respectively)
IN
RMS value of current of neutral
Pt, P1, P2, P3
Values of active power (total, phase 1, phase 2, phase 3 respectively)
P12, P32
(only for 3-wire measurement) value of power measured by Wattmeter 1-2 and 3-2
respectively
Qt, Q1, Q2, Q3
Values of reactive power (total, phase 1, phase 2, phase 3 respectively)
Q12, Q32
(only for 3-wire measurement) Value of power measured by VAR meter Va1-2 and
3-2 respectively
St, S1, S2, S3
Values of apparent power (total, phase 1, phase 2, phase 3 respectively)
S12, S32
(only for 3-wire measurement) Value of power measured by VA meter Va1-2 and 3-
2 respectively
Pft, pf1, pf2, pf3
Values of power factors (total, phase 1, phase 2, phase 3 respectively)
dPft, dpf1, dpf2, dpf3
Value of the cos (total, phase 1, phase 2, phase 3 respectively)
Ead, Pd
Values of total active energy and active power on demand respectively
Esd, Sd
Values of total apparent energy and apparent power on demand respectively
Tab. 3: Symbols used in the POWER function
The symbols "i" and "c" stand for reactive powers (Q), power factors (Pf) and cos (dpf),
inductive and capacitive respectively.
AMPROBE
DMIII MULTITEST
EN-58
7.6.2. "METER" mode
By selecting this function the instrument selects automatically the METER mode
corresponding to one of the screens below according to the settings made as per
paragraph 7.1.
27.09.00 17:35:12
27.09.00 17:35:12
27.09.00 17:35:12
SINGLE PHASE
POWER
V1 = 230.0 V
I1 = 145.3 A
P1 = 32.91 kW
Q1 = 5.767 kVAR
S1 = 33.41 kVA
pf1 = 0.99 i
dpf1 = 0.99 i
POWER
THREE WIRE
Pt = 64.19 kW
Qt = 10.99 kVAR
St = 65.12 kVA
pft = 0.99 i
dpft = 1.00 i
POWER
THREE PHASE
Pt = 135.8 kW
Qt = 24.59 kVAR
St = 138.0 kVA
pft = 0.98 i
dpft = 1.00 i
Phseq= 123
WAVE
PG-
PG+
ChgP
WAVE
PG-
PG+
ChgP
WAVE
PG-
PG+
Example of screen in
single-phase mode
Example of screen in “3-
wire” three-phase mode
Example of screen in “4-
wire” three-phase mode
The symbols used are described in Tab. 3.
For eventual messages displayed see appendix 1 – MESSAGES DISPLAYED.
Following keys are active:
F2: to pass to "WAVE" mode (see paragraph 7.6.3).
F1: (only for three-phase measurement) to display the previous or the
following screen. On the basis of the settings made as per paragraph
7.1 following screens are displayed cyclically:
Three-phase 3 wires: total three-phase values, Wattmeter phases 1-2 and 2-3 values, peak demand
Three-phase 4 wires: total three-phase values, phase1, phase2 and phase3 values, peak demand
F3/F4: to pass to previous/next function respectively
SAVE: to save in the instrument memory a record of “Smp” type and the
instantaneous values of voltage and current present at the instrument
inputs. This function is disabled during a recording
ENTER/HOLD: to enable/disable the HOLD function (updating interruption) of
displayed data. All previous functions remain however available. When
the HOLD function is activated, the word HOLD is displayed. When
this function is enabled it’s not possible to record nor perform energy
measurements. This function is disabled during a recording or an
energy measurement
MENU: to enter the MENU mode and change the instrument settings (see
paragraph 7.1 and 7.2). It’s not possible to enter the configuration
MENU during a recording or an energy measurement
START/STOP: to record selected parameters according to the instrument’s settings
AMPROBE
DMIII MULTITEST
EN-59
7.6.2.1. PEAK ENERGY DEMAND
In three-phase systems, by selecting the POWER function and pressing F1 thrice you can
reach the “Peak Demand” mode. This mode shows the values corresponding to the
recording being performed or to the last performed recording (if no recording is being
performed).
The “Peak Demand” screen shows the max average value of active Power (and the
corresponding energy) or max average value of apparent power (and the corresponding
energy) measured during the last (or running) recording. The average value is evaluated
with reference to the integration period set for the recording. This screen also shows the
corresponding active energy and the corresponding peak date and time.
27.09.00 17:35:12
27.09.00 17:35:12
PEAK DEMAND
THREE PHASE
Ead = 98.36 kWh
Pd = 24.59 kW
Peak Date
25.09.00 17:00
Int Period: 15min
Rec n: 06
PEAK DEMAND
THREE PHASE
Esd = 120.84 kVAh
Sd = 30.21 kVA
Peak Date
25.09.00 18:15
Int Period: 15min
Rec n: 06
ChgP
Wh
PG-
PG+
ChgP
VAh
PG-
PG+
Example of “PEAK ENERGY DEMAND” screen
F1: to display the previous or the following screen. On the basis of the
settings made as per paragraph 7.1 following screens are displayed
cyclically:
Three-phase 3 wires: total three-phase values, Wattmeter phases 1-2 and 2-3 values, peak demand
Three-phase 4 wires: total three-phase values, phase1, phase2 and phase3 values, peak demand
F3: to show active power and active energy values
F4: to show apparent power and apparent energy values
SAVE: to save in the instrument memory a record of “Smp” type and the
instantaneous values of voltage and current present at the instrument
inputs. This function is disabled during a recording
ENTER/HOLD: to enable/disable the HOLD function (updating interruption) of
displayed data. All previous functions remain however available. When
the HOLD function is activated, the word HOLD is displayed. When
this function is enabled it’s not possible to record nor perform energy
measurements. This function is disabled during a recording or an
energy measurement
MENU: to enter the MENU mode and change the instrument settings (see
paragraph 7.1 and 7.2). It’s not possible to enter the configuration
MENU during a recording or an energy measurement
START/STOP: to record selected parameters according to the instrument’s settings
AMPROBE
DMIII MULTITEST
EN-60
7.6.3. "WAVE" mode
By selecting the WAVE mode one of the screens below will be displayed according to the
settings made as per paragraph 7.1. The screens show the waveform of phase currents
and phase (or phase-to-phase) voltage.
Example of screen in
single-phase mode
Example of screen in “3-
wire” three-phase mode
Example of screen in “4-
wire” three-phase mode
The symbols used are described in Tab. 3.
For eventual messages displayed see appendix 1 – MESSAGES DISPLAYED.
Following keys are active:
F1: (only for three-phase mode): to display the values related to the
following phase. On the basis of the settings made as per paragraph
7.1 following screens are displayed cyclically:
3 wires three-phase: values of Wattmeter 1-2, values of
Wattmeter 2-3
4 wires three-phase: values of phase 1, phase 2 and phase 3
ESC: to return back to METER mode (see paragraph 7.6.2)
SAVE: to save in the instrument memory a record of “Smp” type containing
the instantaneous values of voltage and current present at the
instrument inputs. This function is disabled during a recording
ENTER/HOLD: to enable/disable the HOLD function (updating interruption) of
displayed data. All previous functions remain however available. When
the HOLD function is activated, the word HOLD is displayed. When
this function is enabled it’s not possible to record nor perform energy
measurements. This function is disabled during a recording or an
energy measurement
MENU: to enter the MENU mode and change the instrument settings (see
paragraph 7.1 and 7.2). It’s not possible to enter the configuration
MENU during a recording or an energy measurement
START/STOP: to record selected parameters according to the instrument’s settings
27.09.00 17:35:12
V1 = 229.7 V
I1 = 132.0 A
pf1 = 0.98 i
27.09.00 17:35:12
V12 = 379.9 V
I1 = 132.0 A
ChgP
27.09.00 17:35:12
V1 = 229.7 V
I1 = 132.0 A
pf1 = 0.98 i
ChgP
AMPROBE
DMIII MULTITEST
EN-61
7.7. "ENERGY" FUNCTION
This function permits to display the values of phase and total active powers, phase and
total capacitive and inductive reactive powers, power factors and phase and total cos.
Furthermore, the instrument is able to measure directly (see 7.7.2) the values of phase
and total active energies and the values of phase and total capacitive and inductive
reactive energies.
7.7.1. Symbols
The position ENERGY has one working mode:
METER
This mode will be described in detail in the next paragraphs.
The symbols used are described below:
Symbol
Description
Pt, P1, P2, P3
Values of active power (total, phase 1, phase 2, phase 3 respectively)
P12, P32
(only for 3-wire measurement) Value of power measured by Wattmeter 1-2 and 3-2
respectively
Qt, Q1, Q2, Q3
Values of reactive power (total, phase 1, phase 2, phase 3 respectively)
Q12, Q32
(only for 3-wire measurement) Value of power measured by VARmeter 1-2 and 3-2
respectively
St, S1, S2, S3
Values of the apparent power (total, phase 1, phase 2, phase 3 respectively)
S12, S32
(only for 3-wire measurement) Value of power measured by VAmeter 1-2 and 3-2
respectively
Eat, Ea1, Ea2, Ea3
Values of active energy (total, phase 1, phase 2, phase 3 respectively)
Erit, Eri1, Eri2, Eri3
Values of inductive reactive energy (total, phase 1, phase 2, phase 3 respectively)
Erct, Erc1, Erc2, Erc3
Values of capacitive reactive Energy (total, phase 1, phase 2, phase 3 respectively)
Est, Es1, Es2, Es3
Values of apparent energy (total, phase 1, phase 2, phase 3 respectively)
Tab. 4: Symbols used in the ENERGY function
The symbols "i" and "c" stand for reactive powers (Q) and energies (Er), inductive and
capacitive respectively.
AMPROBE
DMIII MULTITEST
EN-62
7.7.2. "METER" mode
By selecting this function the instrument selects automatically the METER mode
corresponding to one of the screens below according to the settings made as per
paragraph 7.1.
27.09.00 17:35:12
27.09.00 17:35:12
27.09.00 17:35:12
ENERGY
SINGLE PHASE
Ea1 = 0.000 kWh
Erc1 = 0.000 kVARh
Eri1 = 0.000 kVARh
Es1 = 0.000 kVAh
P1 = 36.38 kW
Q1 = 6.375 kVAR
S1 = 36.94 kVA
Meas Time: 00:00:00
ENERGY
THREE PHASE
Eat = 0.000 kWh
Erct = 0.000 kVARh
Erit = 0.000 kVARh
Est = 0.000 kVAh
Pt = 36.38 kW
Qt = 6.375 kVAR
St = 36.94 kVA
Meas Time: 00:00:00
ENERGY
THREE PHASE
Eat = 0.000 kWh
Erct = 0.000 kVARh
Erit = 0.000 kVARh
Est = 0.000 kVAh
Pt = 167.7 kW
Qt = 30.47 kVAR
St = 170.4 kVA
Meas Time: 00:00:00
Meas
PG-
PG+
Meas
PG-
PG+
ChgP
Meas
PG-
PG+
Example of screen in
single-phase mode
Example of screen in “3-
wire” three-phase mode
Example of screen in “4-
wire” three-phase mode
The symbols used are described in Tab. 4.
For eventual messages displayed see appendix 1 – MESSAGES DISPLAYED.
Following keys are active:
F2: to start / stop immediately a direct energy measurement. The energy
counters will start increasing proportionally to the active power
absorbed by the load.
The results obtained cannot be memorised.
If the active power is negative the counters will not increase.
F1: (only for 4-wire measurement) to display the following screen. On the
basis of the settings made as per paragraph 7.1 following screens are
displayed cyclically:
total three-phase values, values of phase 1, phase 2 and phase 3
F3/F4: to pass to previous/next function respectively
SAVE: to save in the instrument memory a record of “Smp” type containing
the instantaneous values of voltage and current present at the
instrument inputs. This function is disabled during a recording
ENTER/HOLD: to enable/disable the HOLD function (updating interruption) of
displayed data. All previous functions remain however available.
When the HOLD function is activated, the word HOLD is displayed.
When this function is enabled it’s not possible to record nor perform
energy measurements. This function is disabled during a recording or
an energy measurement
MENU: to enter the MENU mode and change the instrument settings (see
paragraph 7.1 and 7.2). It’s not possible to enter the configuration
MENU during a recording or an energy measurement
START/STOP: to record selected parameters according to the instrument’s settings
AMPROBE
DMIII MULTITEST
EN-63
8. MEASURING PROCEDURES
8.1. USING THE INSTRUMENT IN A SINGLE-PHASE SYSTEM
CAUTION
The maximum voltage between V1 and COM inputs is 600 V~ (CATII) /
350V~ phase – earth or 600V~ (CATIII) / 300 V~ phase to earth.
Do not measure voltages exceeding the limits prescribed by this manual.
Should you exceed the voltage limits you could damage the instrument
and/or its components or endanger your safety.
Phase
Neutral
I1
T1 T2 T3 T4
I1 I2 I3
(V1) (V2) (V3)
(COM)
Instrument connection in a single-phase system
1. Check, and if needed modify, the basic settings of the instrument (see paragraphs 7.1
and 7.2). Particularly, the single-phase mode must be set.
2. Rotate the switch to the position corresponding to the type of analysis desired.
3. Connect the phase and neutral voltage wires respecting the connections shown in the
picture.
4. If you want to measure current and power, connect the clamp meter to the phase
conductor respecting the specifications shown on the clamp and the connections
shown in the picture.
In case of doubt, select the position POWER and check if the active power P is
positive. If it’s negative, remove current transducer from the wire and reconnect it so
the transducer label faces the opposite direction.
5. Apply voltage to the electrical equipment under test (if previously shut off for the
instrument connection).
6. The values of the available electrical parameters will be displayed on the display of the
instrument. For further details see the paragraph relevant to the position of the switch.
7. You can press HOLD to interrupt the updating in real time of the displayed values.
8. If you want to record:
a) Check, and if needed modify, the values of the basic parameters (see paragraphs
7.1 and 7.2).
b) Check, and if needed modify, the recording parameters by pressing MENU (see the
paragraph corresponding to the position of the rotary switch selected).
c) To start the recording press START (see paragraph 10.1).
AMPROBE
DMIII MULTITEST
EN-64
8.2. USING THE INSTRUMENT IN A THREE-PHASE 4-WIRE SYSTEM
CAUTION
The maximum voltage between V1, V2, V3, COM inputs is 600 V~ (CATII) /
350V~ phase to earth or 600V~ (CATIII) / 300 V~ phase to earth.
Do not measure voltages exceeding the limits prescribed by this manual.
Should you exceed the voltage limits you could damage the instrument
and/or its components or endanger your own safety.
L1
L2
L3
N
I1 I2 I3
T1 T2 T3 T4
I1 I2 I3
(V1) (V2) (V3)
(COM)
Instrument connection in a three phase 4-wire system
1. Check, and if needed modify, the basic settings of the instrument (see paragraphs 7.1
and 7.2). Particularly, the 3PH4W mode must be set.
2. Rotate the switch to the position corresponding to the type of analysis desired.
3. Connect the phase and neutral voltage wires following the connections shown in the
picture above.
4. To measure current and power, connect the clamp meter to the phase conductor
following the specifications shown on the clamp and the connections shown in the
picture above. In case of doubts select the position POWER and, connecting one
clamp a time, check if:
a) the phase sequence is correct (see paragraph 7.4.2).
b) the active power P of each phase is positive. If it’s negative, remove current transducer
from the wire and reconnect it so the transducer label faces the opposite direction.
c) the value of the Pf of each phase is not excessively low (typically it’s not lower than
0.4). In case the Pf is lower than 0.4, check if the phase voltage is associated to the
right clamp meter (for example the voltage of phase 1 must be associated to the
clamp meter no. 1).
5. Apply voltage to the electrical equipment under test (if previously shut off for the
instrument connection).
6. The values of the available electrical parameters will be displayed. For further details
see the paragraph relevant to the position of the switch.
7. You can press HOLD to interrupt the real time updating of the displayed values.
8. If you want to record:
a) Check and modify the values of the basic parameters (see paragraphs 7.1 and 7.2).
b) Check and, if needed, modify the recording parameters by pressing MENU (see the
paragraph corresponding to the position of the rotary switch selected).
c) To start the recording press START (see paragraph 10.1).
AMPROBE
DMIII MULTITEST
EN-65
8.3. USING THE INSTRUMENT IN A THREE-PHASE 3-WIRE SYSTEM
CAUTION
The maximum voltage between V1, V2, V3 inputs is 600 V~ (CATII) /
350V~ phase to earth or 600V~ (CATIII) / 300 V~ phase to earth.
Do not measure voltages exceeding the limits prescribed by this manual.
Should you exceed the voltage limits you could damage the instrument
and/or its components or endanger your own safety.
L1
L2
L3
N
I1 I2 I3
T1 T2 T3 T4
I1 I2 I3
(V1) (V2) (V3)
(COM)
Instrument connection in a three-phase 3-wire system
CAUTION
Please note that in this case the Yellow cable is connected with the red
cable on phase 2.
Note: The connection of Clamp 2 isn’t necessary for Power measurement.
1. Check, and if needed modify, the basic settings of the instrument (see paragraphs 7.1
and 7.2). Particularly, the 3 wires mode must be set.
2. Rotate the switch to the position corresponding to the type of analysis desired.
3. Connect the phase and neutral voltage wires following the connections shown in the
picture above.
4. To measure current and power, connect the clamp to the phase conductor following the
specifications shown on the clamp and the connections shown in the picture above. In
case of doubts set temporarily the 3PH3W mode, select the POWER position,
connect the yellow wire of the instrument to earth and, connecting one clamp a time,
check if:
a) The phase sequence is correct (see paragraph 7.4.2).
b) The active power P of each phase is positive. If negative, turn the clamp of the
phase in question.
c) The value of the Pf of each phase is excessively low (typically it’s not lower than
0.4). If the Pf is lower than 0.4, check if the phase voltage is associated to the right
clamp meter (ex. the voltage of phase 1 must be associated to the clamp n. 1).
AMPROBE
DMIII MULTITEST
EN-66
d) After checking, and if needed modifying, the connection of the instrument to the
equipment re-set the 3 wires mode and the connections shown in the picure above
(yellow and red wires together).
5. Energize the electrical equipment under test.
6. The values of the available electrical parameters will be displayed of the instrument.
For further details see the paragraph relevant to the position of the switch.
7. You can press HOLD to interrupt the updating in real time of the displayed values.
8. If you want to record:
a) Check and modify the values of the basic parameters (see paragraphs 7.1 and 7.2).
b) Check and eventually modify the recording parameters by pressing MENU (see the
paragraph corresponding to the position of the rotary switch selected).
c) To start the recording press START (see paragraph 10.1).
AMPROBE
DMIII MULTITEST
EN-67
9. SAVING RESULTS
The SAVE button can be used to store the displayed results related to the rotary switch
position:
SAFETY TEST (LOW, Insulation Test, Phase sequence, Ground Test): pressing this
key the instrument will store the displayed result generating a corresponding record in
the SAFETY TEST MEMORY (see paragraph 11.1)
POWER QUALITY: pressing this key the instrument will store the displayed result
generating a "Smp" record in the ANALYZER MEMORY (see paragraph 11.2)
Please note that Saving results is different from recording.
9.1. SAVING SAFETY TEST RESULTS
After a SAFETY TEST (LOW, Insulation Test, Phase sequence, Ground Test) the user
can press the SAVE button to store the displayed result.
The REMINDER
PLACE parameter
isn't related to
Measurement Order
Number and can
help the user to
remind the place
where he performed
the measurement.
05.06.01
SAVE IN LOC. 006
OK? (SAVE/ESC)
REMINDER PLACE:009
Memory Location
REMINDER PARAMETER
The following keys are available:
F3, F4: to adjust the REMINDER PLACE.
SAVE: to store the test result associating to the actual REMINDER PLACE
ESC: to quit this mode without saving.
9.2. SAVING DISPLAYED VALUES OF POWER QUALITY FUNCTION
During a Real Time measurement (in POWER QUALITY function) if the user press the
SAVE button, a "Smp" record will be generate in the "ANALYZER MEMORY". This file
contains the Voltage and Current values present at instrument's input when the user
pressed the SAVE key.
Downloading these values to a PC (using the management Software) the Power, Energy,
Harmonics, etc values can be calculated and displayed as well.
AMPROBE
DMIII MULTITEST
EN-68
10. RECORDINGS
10.1. START A RECORDING
The recording function is available only for POWER QUALITY rotary switch position.
As you can read in the paragraph 7.2, a recording can be started manually or
automatically. Therefore, after setting all the parameters and leaving the Menu, the
instrument will start to record:
MANUALLY: the recording will start when Instrument time reach the “00” seconds
value after pressing START/STOP.
AUTOMATICALLY: If the operator has pressed START/STOP the instrument will
remain in stand-by until the date and time previously set, then the recording will start.
While if the operator doesn’t press START/STOP the recording will never start.
CAUTION
For recordings we recommend to use the external power supply
adapter (code DMT-EXTPS) even the instrument allows the operator to
perform a recording using internal batteries.
If you press Start a recording without the external power supply adapter (code DMT-
EXTPS) the instrument will display a warning message “No ext supply”. Press START
key again to run the recording or press ESC to quit.
If during a recording the external power supply adapter (code DMT-EXTPS) is de-
energised, the instrument will continue the recording using the internal battery power until
the batteries are exhausted (the data stored until the definitive turning off won’t get lost).
For this we recommend you ALWAYS insert a new set of batteries before a long
recording.
The instrument uses sophisticated algorithms to prolong the battery life. Particularly:
The instrument switches OFF the backlight Automatically after 5 seconds.
If the Battery level is too low the Backlight function will be disabled.
If the instrument is just displaying in real time (and the external power supply is not
connected), after about 5 minutes from the last key pressure or switch rotation the
instrument turns off automatically ("AUTOPOWER OFF" function).
If the instrument is recording or is measuring energy (and the external power supply is
not connected), after about 5 minutes from the last key pressure or switch rotation the
instrument starts a special procedure to save the batteries ("ECONOMY MODE"): the
instrument keeps recording but the display is turned off.
Before starting a recording the operator should first evaluate the state of the equipment,
decide what to record and set the instrument accordingly.
In order to facilitate this task we have decided to supply the instrument pre-set with
a general configuration which should fit most cases.
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DMIII MULTITEST
EN-69
The chosen configuration is the following (for POWER QUALITY function)
ANALYZER CONFIG:
Frequency: 60Hz
Full scale of the clamps: 1000A
Transforming ratio of voltmetric transformers: 1
Type of electrical equipment: 4 wires
Password: enabled
RECORDER CONFIG:
Start: Manual (the recording is started
at 00 sec mark on clock after pressing
the START/STOP key)
Stop: Manual
Integration period: 15min
Recording of harmonics: ON
Recording of Sag and Surge: ON
Voltage Reference for Sag and Surge detection: 110V
Upper Limit for Sag and Surge detection: 6%
Lower Limit for Sag and Surge detection: 10%
Selected voltages: V1, V2, V3
Selected voltage harmonics: Thd, 01, 03, 05, 07
Selected currents: I1, I2, I3, IN
Selected current harmonics: Thd, 01, 03, 05, 07
CO-GENERATION: OFF
Powers, Pf and cos selected: Pt, P1, P2, P3
Qti, Q1i, Q2i, Q3i
Qtc, Q1c, Q2c, Q3c
St, S1, S2, S3
Pft, Pf1, Pf2, Pf3
dpft, dpf1, dpf2, dpf3
Energies: Eat, Ea1, Ea2, Ea3
Erit, Eri1, Eri2, Eri3
Erct, Erc1, Erc2, Erc3
Est, Es1, Es2, Es3
If the user changed the instrument’s settings can quickly resume the above configuration
using the RESET option (see paragraph 5.5).
By pressing START/STOP the recording of the selected parameters is started according to
the settings made in the MENU (see paragraphs 7.1 and 7.2). The rotary switch position
doesn’t affect the recording setting.
The instrument will Start the recording when the Time reach hh:mm:00sec (MAN mode) or
when the START Date and Time (see paragraphs 7.1 and 7.2) will be reached. Before of
that the instrument will display the message “ Please wait… ”.
As the default value of the integration periods is set at 15 minutes the instrument will store
data in the temporary memory for 15 minutes. Afterwards the instrument will elaborate the
results saved in the temporary memory and will save the result of this elaboration (min,
avg, and max values) in the definitive memory. Therefore, if an integration period of 15
minutes has been set, the recording will continue for about 15 minutes before producing a
series of recorded values. If the recording is interrupted before the selected integration
period has completely elapsed the data stored in the temporary memory will not be
AMPROBE
DMIII MULTITEST
EN-70
elaborated and the corresponding series of values won’t be transferred to the definitive
memory.
10.2. DURING A RECORDING
If during a recording the external power supply is de-energised, the instrument will
continue the recording using the internal battery power until the batteries are exhausted
(the data stored up to the point the instrument shuts down won’t get lost). For this we
recommend you ALWAYS insert a new set of batteries before a long recording.
The instrument uses sophisticated algorithms to prolong the battery life. Particularly if the
instrument is recording or is measuring energy (and the external power supply is not
connected), after about 5 minutes from the last key pressure or switch rotation the
instrument starts a special procedure to save the batteries ("ECONOMY MODE"): the
instrument keeps recording but the display is turned off.
During a recording the following are disabled:
AUTOPOWER OFF function
ON/OFF key
HOLD key
SAVE key
10.2.1. MENU key
If you press press the MENU key during a recording the following screen will appear:
INFO REC n XX
START
09.18.01 11:35
STOP
13.18.01 12:00
INT PERIOD: 15min
REC PERIODS:00004
REC TIME:139d.02h
HARM REC: (ON)
ANOM REC: (ON)
N ANOMALIES: 00000
Recording
Recording
This page includes:
1. START Date and Time
2. STOP Date and Time (or Manual).
3. Integration Period
4. Actual Number of Elapsed Integration Periods
5. Actual Recording Time
6. Status of Harmonic Flag
7. Status of Voltage Anomalies Flag
8. Number of Voltage anomalies occurred during the recording
AMPROBE
DMIII MULTITEST
EN-71
10.2.2. Rotary Switch during a recording
If You move the rotary switch during a recording the following screen will appear:
Recording
Recording
This page means that a recording is running but the actual rotary switch position doesn't
correspond to this.
The instrument will continue to record.
10.3. STOPPING A RECORDING / ENERGY MEASUREMENT
The instrument uses a protective routine to avoid the risk of being disturbed or interrupted
during a recording or an energy measurement. Once a recording or a direct energy
measurement (see paragraph 7.7.2) has been started (with the option PASSWORD
enabled), after about 3 minutes from the last key pressure or switch rotation it won’t be
sufficient to press START/STOP (if a recording is running) or F2 (if an energy measuring is
running) to stop the recording, it will be necessary to insert the password.
In order to insert the password (which is not changeable), press the multifunction keys in
the following sequence (within 10 seconds):
F1, F4, F3, F2
In order to enable/disable this option see paragraph 7.1.
If a wrong password is inserted, the instrument will display an error message and will
repeat the request.
If no key is pressed after about 10 seconds the instrument returns back to the original
screen.
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DMIII MULTITEST
EN-72
11. INSTRUMENT'S MEMORY
By pressing the MENU key the following screen will be displayed:
MENU GENERAL
SAFETY TEST MEMORY
ANALYZER MEMORY
RESET
ANALYZER CONFIG
RECORDER CONFIG
CONTRAST
DATE&TIME
LANGUAGE
COUNTRY
It’s not possible to enter the MENU during a recording or a Real Time Energy
measurement.
11.1. SAFETY TEST MEMORY
Selecting the SAFET YEST MEMORY item and pressing ENTER the instrument display
the following screen:
SAFETY TEST MEMORY
MEM TYPE PLACE
001 LOW 003
002 EARTH 003
003 M 004
TOT:003 FREE:996
LAST
ALL
Example of SAFETY TEST
MEMORY screen
MEM: Order Number of the mesurement
TYPE: Measurement TYPE
PLACE: Mnemonic parameter associated by User to Measurement
TOT: Total Number of Measurement
FREE: Available Memory Location
Following keys are enabled:
F1, F2: (to select the Measurement).
F3: to cancel the last recording effected.
F4: to cancel all the recordings effected.
ENTER: to see the measurement results of the selected test
ESC: to quit this mode
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DMIII MULTITEST
EN-73
11.2. ANALYZER MEMORY
This option permits you to display:
The present content of the instrument memory
The size of the memorised data
The residual space available for future recordings (expressed in days and hours)
All the stored data can be displayed and analyzed only downloading them into a PC
with the operating software.
After selecting “ANALYZER MEMORY” from the Main Menu the screen below will be
displayed
ANALYZER MEMORY
01 Smp 02.01 01:23
02 Rec 02.01-02.01
03 R&a 02.01-02.01
04 Rec 02.01-02.01
05 R&a 02.01-02.01
06 Rec 04.01-05.01
DATA SIZE:0.11Mb
REC TIME: 0d.06h
LAST
ALL
Example of ANALYZER
MEMORY screen
Rec: recordings effected with respective Start and Stop dates expressed in the
format “day.month” (start) – “day.month” (stop) without Voltage Sag and Surge
detection.
R&a: recordings effected with respective Start and Stop dates expressed in the
format “day.month” (start) – “day.month” (stop) with Voltage Anomalies (Sag
and Surge) detection .
Smp: values of the samples of voltage and current stored by pressing SAVE.
DATA SIZE: dimensions of the data saved in the instrument memory.
REC TIME: amount of memory available, calculated on the basis of the parameters
selected for recording, therefore the most complete one (expressed in the format
“days.hours”) to make recordings.
The maximum quantity of Rec + R&a + Smp which can be contained by the instrument is 35.
Following keys are enabled:
F1, F2: (only if the quantity of Rec+R&a+Smp is higher than 7) to run over all the
recordings stored in the instrument memory.
F3: to cancel the last recording effected.
F4: to cancel all the recordings effected.
ESC: to quit this mode
AMPROBE
DMIII MULTITEST
EN-74
12. CONNECTING THE INSTRUMENT TO A PC
In order to connect the instrument to a PC you must connect the Optical serial cable code
C2001 shipped with the instrument to a PC COM port.
The available transmission speeds are the following:
9600, 19200, 57600 (default value)
The value of the transmission speed (Baud Rate) is displayed on the initial screen
(immediately after turning on the instrument, see paragraph 4.2). The value of this
parameter can be modified only with the management software.
For download instructions please refer to software help file.
In order to transfer the memorized data from the instrument to the PC the following
procedure must be followed (after Sw installation):
1. Switch ON the instrument and wait that Initial screen disappears (the rotary
Switch position isn't relevant).
2. Connect the Optical serial output of the instrument to the serial output of the PC
through the Original C2001 serial cable
3. Run the program
4. Select the "Download" command
5. Refer to software help ON Line for further instructions.
AMPROBE
DMIII MULTITEST
EN-75
13. MAINTENANCE
13.1. GENERAL INSTRUCTION
1. The tester you have purchased is a precision instrument. Strictly follow the instructions
for use and storage reported in this manual to avoid any possible damage or danger
during use.
2. Do not use this tester under unfavourable conditions of high temperature or humidity.
Do not expose to direct sunlight.
3. Be sure to turn off the tester after use. If the instrument is not to be used for a long
period you are recommended to remove batteries to avoid acid leakage which may
damage the internal circuits of the instrument.
13.2. BATTERY REPLACEMENT
The symbol shows the battery charge: If it is completely "black" the battery are full
charge, while the t symbol indicate weak batteries. When the batteries are too low to
execute the test the instrument will show a warning message.
In the case interrupt testing and replace batteries according the following the procedure.
The instrument is capable of keeping the data stored even though batteries are not
installed. The Instrument Date and Time settings aren't lost if you change the batteries
within 24hours.
ATTENTION
Only skilled technicians can perform this operation. Before replacing batteries
make sure that all test leads have been disconnected from input terminals.
1. Switch OFF the instrument.
2. Remove all the test leads from the input terminals.
3. Unscrew the fixing screws from the battery compartment cover and remove it.
4. Remove all batteries replacing them with 6 new ones of the same type (1.5V – LR6 –
AA – AM3 – MN 1500) respecting the polarity signs.
5. Fix the screws on the battery compartment cover. Then put the holster on.
13.3. INSTRUMENT CLEANING
Use a soft dry cloth to clean the instrument. Never use wet cloths, solvents, water, etc.
AMPROBE
DMIII MULTITEST
EN-76
14. TECHNICAL SPECIFICATIONS
14.1. TECHNICAL FEATURES
Accuracy is indicated as [% of reading + number of digits]. It refers to the following
atmospheric conditions: a temperature of 23°C ± 5°C with a relative humidity < 60%.
14.1.1. Safety Test functions
LOW: 200mA CONTINUITY TEST (AUTO, RT+, RT- MODE)
Range []
Resolution []
Accuracy(*)
0.01 9.99
10.0 99.9
0.01
0.1
(2% Reading + 2 digit)
(*) After Test leads calibration
Test Current > 200mA DC per R5 (Test leads included)
Resolution for Test current: 1mA
Open Circuit Voltage 4V V0 24V
INSULATION TEST
Test Voltage [V]
Range [M]
Resolution [M]
Accuracy
50
0.01 9.99
0.01
(2% Reading + 2 digit)
10.0 49.9
0.1
50.0 99.9
0.1
(5% Reading + 2 digit)
100
0.01 9.99
0.01
(2% Reading + 2 digit)
10.0 99.9
0.1
100.0 199.9
0.1
(5% Reading + 2 digit)
250
0.01 9.99
0.01
(2% Reading + 2 digit)
10.0 199.9
0.1
200 249
1
250 499
1
(5% Reading + 2 digit)
500
0.01 9.99
0.01
(2% Reading + 2 digit)
10.0 199.9
0.1
200 499
1
500 999
1
(5% Reading + 2 digit)
1000
0.01 9.99
0.01
(2% Reading + 2 digit)
10.0 199.9
0.1
200 999
1
1000 1999
1
(5% Reading + 2 digit)
Open circuit Test Voltage <1.3 x Nominal Test Voltage
Short Circuit Current <6.0mA with 500V Test Voltage
Nominal Test Current 500V >2.2mA with 230k
other >1mA with 1k*Vnom
FREQUENCY MEASUREMENT
Range [Hz]
Resolution [Hz]
Accuracy
47.0 63.6
0.1
(0.1%Reading+1 digit)
RCD and LOOP function are active only for 50Hz 0,5Hz frequency
PHASE ROTATION : VOLTAGE MEASUREMENT
Range [V]
Resolution [V]
Accuracy
0 460V
1
(3%Reading + 2digit)
GROUND TEST: RESISTANCE MEASUREMENT WITH EARTH RODS
Range RE []
Resolution []
Accuracy
0.01 – 19.99
20.0 – 199.9
200 - 1999
0.01
0.1
1
(5% Reading + 3 digit)
Test Current <10mA – 77.5Hz
Open circuit Test Voltage <20V RMS
GROUND TEST: RESISTIVITY MEASUREMENT
Range
Resolution
Accuracy
0.60 19.99 m
20.0 199.9m
200 1999m
2.00 99.99km
100.0 125.6km(*)
0.01 m
0.1m
1 m
0.01 km
0.1 km
(5% Reading + 3 digit)
(*) setting distance = 10m
Test Current <10mA – 77.5Hz
Open circuit Test Voltage <20V RMS
AMPROBE
DMIII MULTITEST
EN-77
14.1.2. POWER QUALITY function
VOLTAGE MEASUREMENT – (AUTORANGE)
Range [V]
Resolution [V]
Accuracy
Input Impedance
15 310V
0.2V
(0.5% Reading+2digit)
300k (Phase-Neutral)
300k (Phase-Phase)
310 600V
0.4V
VOLTAGE SAG AND SURGE DETECTION –(MANUAL RANGE)
Range [V]
Resolution
(Voltage)
Resolution
(Time)
Accuracy
(Voltage)
Accuracy (rif. 50Hz)
(Time)
Input Impedance
15 310V
0.2V
10ms (½ period)
(1.0% Reading+2digit)
10ms (½ period)
300k (Phase-Neutral)
300k (Phase-Phase)
30 600V
0.4V
CURRENT MEASUREMENT – STD & FlexEXTclamps
Range [V]
Resolution [mV]
Accuracy
Input Impedance
Overload Protection
0.0050.26V
0.1
(0.5% Reading+2digit)
200k
5V
0.261V
0.4
(*): Example: with a 1000A/1V full scale clamp , the instrument detect only current higher than 5A
CURRENT MEASUREMENT – FlexINT clamp – 1000A Range
Current Range
Input Voltage Range
Resolution
Accuracy
Input Impedance
Overload
Protection
5.00 20.00A
425V 1.7mV
0.850V
(4.0%rdg + 8.5V)
9.166k
5V
20.00 99.99A
1.7mV 8.499mV
0.850V
(1.0% rdg + 8.5V)
100.0 999.9A
8.5mV 84.99mV
8.5V
(1.0% rdg + 85V)
CURRENT MEASUREMENT – FlexINT clamp – 3000A Range
Current Range
Input Voltage Range
Resolution
Accuracy
Input Impedance
Overload
Protection
15.00 99.99A
1.27mV 8.499mV
0.850V
(1.0% rdg + 8.5V)
9.7k
5V
100.0 270.0A
8.5mV 22.75mV
8.5V
(1.0% rdg + 42.5uV
270.0 999.9A
22.75mV 84.99mV
8.5V
(1.0% rdg + 85uV)
1.00 3.00kA
85mV 255mV
850V
(0.5% rdg + 8.5mV)
POWER MEASUREMENT – (AUTORANGE)
Quantity
Range
Accuracy
Resolution
ACTIVE POWER
0 999.9W
1 999.9kW
1 999.9MW
1000 9999MW
(1.0%Reading+2digit)
0.1W
0.1kW
0.1MW
1MW
REACTIVE POWER
0 999.9VAR
1 999.9kVAR
1 999.9MVAR
1000 9999MVAR
0.1VAR
0.1kVAR
0.1MVAR
1MVAR
APPARENT POWER
0 999.9VA,
1 999.9kVA,
1 999.9MVA
1000 9999MVA
0.1VA
0.1kVA
0.1MVA
1MVA
ACTIVE ENERGY
(Classe2 EN61036)
0 999.9Wh,
1 999.9kWh,
1 999.9MWh
1000 9999MWh
0.1Wh
0.1kWh
0.1MWh
1MWh
REACTIVE ENERGY
(Classe3 IEC1268)
0 999.9VARh,
1 999.9kVARh,
1 999.9MVARh
1000 9999MVARh
0.1VARh
0.1kVARh
0.1MVARh
1MVARh
Cos MEASUREMENT
Cos
Resolution
Accuracy [°]
1.00 – 0.80
0.01
0.6
0.80 - 0.50
0.7
0.50 – 0.20
1.0
VOLTANGE AND CURRENT HARMONICS MEASUREMENT
Range
Accuracy
Resolution
DC – 25H
(5% + 2 digit)
0.1V / 0.1A
26H – 33H
(10% + 2 digit)
34H – 49H
(15% + 2 digit)
Harmonics values are null under fixed threshold:
- DC: its values is null if it is < 2%of Fundamental or is <2% of Full Scale clamp
- 1st Current Harmonic: its values is null if it is < 0.2% Full Scale clamp
- 2nd 49th : its values is null if it is < 0.5% of fundamental or is < 0.1% of Full Scale clamp
AMPROBE
DMIII MULTITEST
EN-78
14.2. STANDARDS
14.2.1. General
Safety EN 61010-1 + A2 (1997)
Protection classification Class 2 - Double Insulation
Pollution degree 2
Degree of Protection: IP50
Over-Voltage Category CAT II 600V~ / 350V~ (phase –earth)
CAT III 600V~ / 300V~ (phase –earth)
Usage: Indoor; max height 2000m
EMC EN61326-1 (1997) + A1 (1998)
The Instrument comply with European Guidelines for CE mark
14.2.2. Safety Test
LOW (200mA): IEC 61557-4
INSULATION TEST IEC 61557-2
PHASE SEQUENCE: IEC 61557-7
GROUND TEST: IEC 61557-5
14.2.3. POWER QUALITY
Voltage Sag and Surge EN50160
Alternating Current Static Watt-hour meters for Active Energy EN61036 (CLASS 2)
Alternating Current Static VAR-hour meters for Reactive Energy IEC1268 (CLASS 3)
AMPROBE
DMIII MULTITEST
EN-79
14.3. GENERAL SPECIFICATIONS
14.3.1. Mechanical Data
Dimensions 225 (L)x165 (W) x 105 (H)mm
Weight 1,2Kg approx
14.3.2. Power supply
Batteries 6 x 1.5-LR6-AA-AM3-MN 1500
Battery Life: LOW: ~ 800 test
INSULATION TEST: ~ 500 test
GROUND TEST: ~ 1000 test
PHASE SEQUENCE: ~ 1000 test
POWER QUALITY (recording): ~20 hours
External Power Supply Adapter Code DMT-EXTPS
(only for POWER QUALITY function)
14.3.3. Display
Display Type Graphic with Backlight
Resolution 128x128
Visible Area 73mmx73mm
14.3.4. Memory
Safety Test Memory 999 measurement
POWER QUALITY: 2MByte (with 63 channels select and
Integration Period = 15min ->more than 30
days).
14.4. ENVIRONMENT
Reference Temperature 23° 5°C
Working Temperature Range 0° 40°C
Working Humidity < 80%
Storage Humidity Range -10 60°C
Storage Humidity < 80%
AMPROBE
DMIII MULTITEST
EN-80
14.5. ACCESSORIES
Standard accessories
Description Code
Set with 4 cables (2m), 4 alligator clips, 2 test leads MTL-VOLT
Set with 4 cables (banana-banana) and 4 earth rods MTL-EARTH
Clamp 1000A diameter 54 mm - cable 2m DM-CT-HTA
Flexible Clamp 1000A/3000A - cable 2m AM-Flex33
External Power Supply Adapter DMT-EXTPS
Management Software www.amprobe.com
(Download Suite)
RS232 Optical-Serial Cable C-2001
Carrying Case HW1254A
User's Manual www.amprobe.com
AMPROBE
DMIII MULTITEST
EN-81
15. SERVICE
15.1. WARRANTY CONDITIONS
Congratulations! Your new instrument has been quality crafted according to quality
standards and contains quality components and workmanship. It has been inspected for
proper operation of all of its functions and tested by qualified factory technicians according
to the long-established standards of our company.
Your instrument has a limited warranty against defective materials and/or workmanship for
one year from the date of purchase provided that, in the opinion of the factory, the
instrument has not been tampered with or taken apart.
Should your instrument fail due to defective materials, and/or workmanship during
this one year period, a no charge repair or replacement will be made to the original
purchaser. Please have your dated bill of sale, which must identify the instrument
model number and serial number and call the number listed below:
Repair Department
ATP – Amprobe, TIF, Promax
Miramar, FL
Phone: 954-499-5400
800-327-5060
Fax: 954-499-5454
Website: www.amprobe.com
Please obtain an RMA number before returning product for repair.
Outside the U.S.A. the local representative will assist you. Above limited warranty covers
repair and replacement of instrument only and no other obligation is stated or implied.
15.2. SERVICE
If the instrument does not operate properly, before contacting the after-sales service check
cables as well as test leads and replace them if necessary.
Should the instrument still operate improperly check that the operation procedure is correct
and conforms with the instructions given in this manual.
If the instrument is to be returned to the after-sales service or to a dealer transportation
costs are on the customer’s behalf. Shipment shall be however agreed upon.
A report must always be enclosed to a rejected product stating the reasons of its return.
To ship the instrument use only the original packaging material; any damage that may be
due to no-original packing shall be charged to the customer.
AMPROBE
DMIII MULTITEST
EN-82
16. PRACTICAL REPORTS FOR ELECTRICAL TESTS
16.1. Continuity Test On Protective Conductors
PURPOSE OF THE TEST
Check the continuity of: protective conductors (PE), main equalising potential
conductors (EQP), secondary equalising potential
conductors (EQS) in TT and TN-S systems.
neutral conductors having functions of protective
conductors (PEN) in TN-C system.
NOTE: This test is to be preceded by a visual check verifying the existence of yellow-
green protective and equalizing potential conductors as well as compliance of
the sections used with the standards’ requirements.
INSTALLATION PARTS TO BE CHECKED
AMPROBE
AMPROBE
Examples for continuity measurement on conductors
Connect one of the
test lead to the
external mass (in
this case the water
pipe) and the other
to the earth
installation using
for example the
protective
conductor of the
closest FM socket.
Connect one of the
test lead to the
protective
conductor of the
FM socket and the
other to the
equalizing potential
node of the earth
installation.
AMPROBE
DMIII MULTITEST
EN-83
Check the continuity among:
a) Earth poles of all the plugs and earth collector or node.
b) Earth terminals of class I instruments (Boiler etc.) and earth collector or node.
c) Main external masses (water, gas pipes etc.) and earth collector or node.
d) Auxiliary external masses to the earth terminal.
ALLOWABLE VALUES
The standards CEI 64-8/6 do not give any indication on the maximum resistance values
that cannot be overcome, in order to be able to declare the positive outcome of the
continuity test.
The standard CEI 64-8/6 simply requires that the instrument in use warn the operator if
the test was not carried out with a current of at least 0.2 A and an open circuit
voltage ranging from 4 V to 24 V.
The resistance values can be calculated according to the sections and lengths of the
conductors under test, anyway if the instrument detects values of some ohm the test
can be considered as passed.
16.2. Check of the Circuit Separation
PURPOSE OF THE TEST
The test, to be effected in case the protection is realized through separation (64-8/6
612.4, SELV or PELV or electrical separation), shall check that the insulation resistance
measured according to the indications below (depending on the separation type)
complies with the limits reported in the table relative to the insulation measurements.
INSTALLATIONPARTS TO BE CHECKED
SELV system (Safety Extra Low Voltage):
Measure the resistance between the active parts of the circuit under test
(separate) and the active parts of the other circuits.
Measure the resistance between the active parts of the circuit under test
(separate) and the ground.
The resistance shall not be lower than 0.25M with a test voltage of 250VDC.
PELV system (Protective Extra Low Voltage):
Measure the resistance between the active parts of the circuit under test
(separate) and the active parts of the other circuits.
The resistance shall not be lower than 0.25M with a test voltage of 250VDC.
Electrical separation:
Measure the resistance between the active parts of the circuit under test
(separate) and the active parts of the other circuits.
Measure the resistance between the active parts of the circuit under test
(separate) and the ground.
The resistance shall not be lower than 0.5M with a test voltage of 500VDC and
1M with a test voltage of 1000VDC.
Presa FM alla quale è collegato
l'utilizzatore. Collegare uno dei puntali
all'alveolo centrale (PE) della presa FM.
AMPROBE
DMIII MULTITEST
EN-84
EXAMPLE OF CHECKING THE SEPARATION AMONG ELECTRICAL CIRCUITS
...And among those
other circuits
...Earth
installation
Between the active
parts of the
separated circuit...
AMPROBE
Measurement of separation among the installation circuits
Insulation or safety transformer making
the separation among the circuits.
Test among the
active parts.
Connect a test
lead of the
instrument to one
of the two
conductors of the
separate circuit
and the other to
one of the
conductors of a
no separate
circuit.
Test between
the active parts
and the earth.
Connect a test
lead of the
instrument to one
of the two
conductors of the
separate circuit
and the other to
the equalising
potential node.
This test is to be
effected only for
SELV circuits or
with electrical
separation.
AMPROBE
DMIII MULTITEST
EN-85
ALLOWABLE VALUES
The test result is positive when the insulation resistance indicates values higher or
equal to those indicated in the table reported in the section relative to insulation tests.
Notes:
SELV system: is a system of category zero or very low safety voltage featured by:
Power supply: autonomous source (ex. batteries, small generator) or safety (ex.
safety transformer).
Protection separation to other electrical systems (double or reinforced insulation or
a metal screen connected to the ground).
There are no earthed points (insulated from the ground).
PELV system: is a system of category zero or very low safety voltage featured by:
Power supply: autonomous source (ex. batteries, small generator) or safety (ex.
safety transformer).
Protection separation to other electrical systems (double or reinforced insulation or
a metal screen connected to the ground).
There are earthed points (not insulated from the ground).
Electrical separation: is a system featured by:
Power supply: insulation transformer or autonomous source with equivalent
features (ex. generator).
Protection separation to other electrical systems (insulation not lower than that of
the insulation transformer).
Protection separation to the ground (insulation not lower than that of the insulation
transformer).
AMPROBE
DMIII MULTITEST
EN-86
16.3. Measurement Of Floor Insulation Resistance In Medical Rooms Cei 64-4
PURPOSE OF THE TEST
Check that the floor is made of material whose insulation resistance complies with the
requirements of the standards CEI 64-4 (3.05.03).
INSTALLATION PARTS TO BE CHECKED
The test shall be effected between:
a) Two electrodes whose distance to each other shall be one meter.
b) One electrode on the floor and the equalising potential node.
AMPROBE
Measurements of floor insulation resistance in medical rooms
The electrodes shall consist of a plate having a surface of 20 cm2, weight equal to
approx. 1 Kg (10N), and a humid absorbing paper ( or humid thin cotton cloth) with
the same surface placed between the metal plate and the floor.
The insulation resistance is represented, both for the measurements indicated in "a"
and for the measurements indicated in "b", by the average of 5 or more tests
effected in different positions at a distance higher than 1 m away from grounded
objects.
Test a):
Connect one test lead of
the instrument to the
equalising potential node
and the other to one of
the electrodes placed on
the floor at a distance
higher than one meter
away from earthed
objects.
Test b):
Connect the instrument
test leads to the
electrodes placed on the
floor at a reciprocal
distance of one meter.
AMPROBE
DMIII MULTITEST
EN-87
ALLOWABLE VALUES
The maximum values of the calculated resistance are the following:
- 1 M
for measurements effected on a new floor.
- 100 M
for the periodical tests effected after the first year after the floor
construction and for the periodical check every 4 year.
All the values shall be registered on a protocol of the initial tests (64-4 5.1.02) and, for
the periodical controls, on the register of periodical tests (64-4 5.2.02).
AMPROBE
DMIII MULTITEST
EN-88
16.4. Ground Resistance Measurement
PURPOSE OF THE TEST
Check if the Automatic protection is coordinated with the ground resistance value. It is not
possible to assume a ground resistance value as reference limit when controlling the test
result, while it is necessary to check every time that the co-ordination complies with the
requirements of the standards.
INSTALLATION PARTS TO BE CHECKED
The ground installation under working conditions. The check is to be effected without
disconnecting the earth plates.
Method for small earth plant
Let current circulate between the earth rod and a current probe positioned at a distance
corresponding to fivefold the diagonal of the area delimiting the earth equipment. Position
the voltage probe at half-way between the earth rod and the current probe, then measure
the voltage between the two.
Black
Green Blue
Red
Use several rods in parallel and moisten
the surrounding ground if the instrument
does not manage to supply the current
necessary to perform the test because
of an high earth resistance.
Ground resistance measurement for small Ground plant
Method for big Ground plant
Also this procedure is based on the voltamperometric method, but it’s mainly used when
it’s difficult to position the auxiliary current rod at a distance corresponding to fivefold the
diagonal of the area of the earth equipment. Position the current probe at a distance equal
to the diagonal of the area of the earth equipment. To make sure that the voltage probe is
positioned outside the area affected by the rod under test, take more measurements, first
positioning the voltage probe at half-way between the rod and the current probe, then
moving the probe both towards the earth rod and towards the current probe.
Black
Green Blue
Red
Use several rods in parallel and moisten
the surrounding ground if the instrument
does not manage to supply the current
necessary to perform the test because
of an high earth resistance.
AMPROBE
DMIII MULTITEST
EN-89
16.5. Ground Resistivity Measurement
PURPOSE OF THE TEST
This test analyzes the resistivity value of the ground in order to define the type of rods to
use.
EQUIPMENT PARTS TO BE TESTED
For the resistivity test admissible values do not exist. The various values measured by
positioning the rods at growing distances “a” must be quoted in a graph. According to the
resulting curve, suitable rods will be chosen. The test result can be affected by metal parts
buried underground (e.g. pipes, cables or other rods), in case of doubts take a second
measurement positioning the rods at an equal distance "a", but rotating their axis by 90°.
Black
Black
Blue
Blue
Green
Green
Red
Red
a
a a
a
a
a
90°
The resistivity value is calculated with the following formula:
=2aR
Where: = specific resistivity of the ground
a= distance between the rods (m)
R= resistance measured by the instrument ()
2° measurement:
compared to the previous
measurement the rods are
rotated by 90°.
1° measurement:
the rods are positioned
at a distance “a”
AMPROBE
DMIII MULTITEST
EN-90
The measuring method allows the operator to
define the specific resistance up to the depth
corresponding approximately to the distance
“a” between the rods. If you increase the
distance “a” you can reach deeper ground
layers and check the ground homogeneity.
After several measurements, at growing
distances “a”, you can trace a profile like the
following ones, after which the most suitable
rod is chosen:
Curve1: as decreases only in depth, it’s
possible to use only a rod in depth.
Curve2: as decreases only until the depth
A, it’s not useful to increase the depth of the
rod beyond A.
Curve3: even at an increased depth, does
not decrease, therefore a ring rod must be
used.
APPROXIMATE EVALUATION OF THE CONTRIBUTION OF INTENTIONAL RODS (64-
12 2.4.1)
The resistance of a rod Rd can be calculated with the following formulas ( = medium
resistivity of the ground).
a) Resistance of a vertical rod
Rd = / L
L= length of the element touching the ground
b) Resistance of an horizontal rod
Rd = 2 / L
L= length of the element touching the ground
c) Resistance of linked elements
The resistance of a complex system with more elements in parallel is always higher
than the resistance that could result from a simple calculation of elements in parallel,
especially if those elements are close and therefore interactive. For this reason, in
case of a linked system the following formula is quicker and more effective than the
calculation of the single horizontal and vertical elements:
Rd = / 4r
r= radius of the circle which circumscribes the link.
1
2
3
Earth rods distances "a" (m)
Resistivity (m)
AMPROBE
DMIII MULTITEST
EN-91
16.6. VOLTAGE ANOMALIES (VOLTAGE SAG AND SURGE)
The Multitest 2000 is able to record as voltage anomalies all those rms values, calculated
every 10ms, beyond the percent thresholds of Voltage Reference (Vref) set during the
programming from 3% to 30 % (with step of 1%).
The Reference must be set to:
Nominal Voltage Phase to Neutral: for Single Phase and 4 wires three phase system
Nominal Voltage Phase to Phase: for 3 wires three phase system
Example1: Three Phase System 3 wires.
Vref = 400V, LIM+= 6%, LIM-=10% =>
High Lim = 400 x (1+6/100) = 424,0V
Low Lim = 400 x (1-10/100) = 360
Example2: Three Phase System 4 wires.
Vref = 230V, LIM+= 6%, LIM-=10% =>
High Lim = 230 x (1+6/100) = 243,08V
Low Lim = 230 x (1-10/100) = 207,0V
The instrument will detect Voltage Anomalies if the RMS Voltage Values (calculated every
10ms) beyond the above calculated thresholds. These limits remain unchanged
throughout the recording period.
When a Voltage anomaly occurs the instrument records:
The number corresponding to the phase where the anomaly occurred.
The “direction” of the anomaly: “Surge” and “Sag” identify respectively voltage drops
(Sag) and peaks (Surge).
The date and time of the beginning of the event in the form day, month, year, hour,
minutes, seconds, hundredths of second.
The duration of the event, in seconds with a resolution of 10ms.
The minimum (or maximum) value of voltage during the event.
16.7. VOLTAGE AND CURRENT HARMONICS
16.7.1. Theory
Any periodical non-sine wave can be represented as a sum of sinusoidal waves having
each a frequency that corresponds to an entire multiple of the fundamental, according to
the relation:
)tsin(VVv(t) kk
1k k0
(1)
where:
V0 = Average value of v(t)
V1 = Amplitude of the fundamental of v(t)
Vk = Amplitude of the kth harmonic of v(t)
AMPROBE
DMIII MULTITEST
EN-92
LEGENDA:
1. Fundamental
2. Third Harmonic
3. Distorted Waveform
Effect of the sum of 2 multiple frequencies.
In the mains voltage, the fundamental has a frequency of 60 Hz, the second harmonic has
a frequency of 120 Hz, the third harmonic has a frequency of 180 Hz and so on. Harmonic
distortion is a constant problem and should not be confused with short events such as
sags, surges or fluctuations.
It can be noted that in (1) the index of the sigma is from 1 to the infinite. What happens in
reality is that a signal does not have an unlimited number of harmonics: a number always
exists after which the harmonics value is negligible. The EN 50160 standard recommends
stopping the index in the expression (1) in correspondence of the 40th harmonic.
A fundamental element to detect the presence of harmonics is THD defined as:
1
40
2
2
V
V
THDv hh
This index takes all the harmonics into account. The higher it is, the more distorted the
waveform gets.
AMPROBE
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EN-93
16.7.2. Limit values for harmonics
EN-50160 fixes the limits for the harmonic voltages, which can be introduced into the
network by the power supplier. In normal conditions, during whatever period of a week,
95% if the RMS value of each harmonic voltage, mediated on 10 minutes, will have to be
less than or equal to the values stated in the following table.
The total harmonic distortion (THD) of the supply voltage (including all the harmonics up to
40th order) must be less than or equal to 8%.
Odd harmonics
Even harmonics
Not multiple of 3
Multiple of 3
Order h
Relative voltage %Max
Order h
Relative voltage % Max
Order h
Relative voltage % Max
5
6
3
5
2
2
7
5
9
1,5
4
1
11
3,5
15
0,5
6..24
0,5
13
3
21
0,5
17
2
19
1,5
23
1,5
25
1,5
These limits, theoretically applicable only for the supplier of electric energy, provide
however a series of reference values within which the harmonics introduced into the
network by the users must be contained.
16.7.3. Presence of harmonics: causes
Any apparatus that alters the sine wave or uses only a part of such a wave causes
distortions to the sine wave and therefore harmonics.
All current signals result in some way virtually distorted. The most common situation is the
harmonic distortion caused by non-linear loads such as electric household appliances,
personal computers or speed control units for motors. Harmonic distortion causes
significant currents at frequencies that are odd multiples of the fundamental frequency.
Harmonic currents affect considerably the neutral wire of electric installations.
In most countries, the mains power is three-phase 50/60Hz with delta primary and star
secondary transformers. The secondary generally provides 230V AC from phase to neutral
and 400V AC from phase to phase. Balancing the loads on each phase has always
represented a headache for electrical systems designers.
Until some ten years ago, in a well-balanced system, the vectorial sum of the currents in
the neutral was zero or quite low (given the difficulty of obtaining a perfect balance). The
devices were incandescent lights, small motors and other devices that presented linear
loads. The result was an essentially sinusoidal current in each phase and a low current on
the neutral at a frequency of 50/60Hz.
“Modern” devices such as TV sets, fluorescent lights, video machines and microwave
ovens normally draw current for only a fraction of each cycle thus causing non-linear loads
and subsequent non-linear currents. All this generates odd harmonics of the 50/60Hz line
frequency. For this reason, the current in the transformers of the distribution boxes
contains only a 50Hz (or 60Hz) component but also a 150Hz (or 180Hz) component, a
50Hz (or 300Hz) component and other significant components of harmonic up to 750Hz
(or 900Hz) and higher.
The vectorial sum of the currents in a well-balanced system that feeds non-linear loads
may still be quite low. However, the sum does not eliminate all current harmonics. The odd
multiples of the third harmonic (called “TRIPLENS”) are added together in the neutral and
can cause overheating even with balanced loads.
AMPROBE
DMIII MULTITEST
EN-94
16.7.4. Presence of harmonics: consequences
In general, even harmonics, i.e. the 2nd, 4th etc., do not cause problems. Triple harmonics,
odd multiples of three, are added on the neutral (instead of cancelling each other) thus
creating a condition of overheating of the wire, which is extremely dangerous.
Designers should take into consideration the three issues given below when designing a
power distribution system that will contain harmonic current:
The neutral wire must be of sufficient gauge.
The distribution transformer must have an additional cooling system to continue
operating at its rated capacity when not suited to the harmonics. This is necessary
because the harmonic current in the neutral wire of the secondary circuit circulates in
the delta-connected primary circuit. This circulating harmonic current heats up the
transformer.
Phase harmonic currents are reflected on the primary circuit and continue back to the
power source. This can cause distortion of the voltage wave so that any power factor
correction capacitors on the line can be easily overloaded.
The 5th and the 11th harmonic contrast the current flow through the motors making its
operation harder and shortening their average life.
In general, the higher the ordinal harmonic number, the smaller its energy is and therefore
the impact it will have on the devices (except for transformers).
16.8. POWER AND POWER FACTOR DEFINITION
In a standard electric installation powered by three sine voltages the following is defined:
Phase Active Power:
(n=1,2,3)
)cos(IVP nnnNn
Phase Apparent Power:
(n=1,2,3)
nnNnIVS
Phase Reactive Power:
(n=1,2,3)
22 nnn PSQ
Phase Power Factor:
(n=1,2,3)
n
n
n
FS
P
P
Total Active Power:
321 PPPPTOT
Total Reactive Power:
321 QQQQTOT
Total Apparent Power:
22 TOTTOTTOT QPS
Total Power Factor:
TOT
TOT
TOT
FS
P
P
where:
VnN = RMS value of voltage between phase n and Neutral.
In = RMS value of n phase current.
fn= Phase displacement angle between voltage and current of n phase.
AMPROBE
DMIII MULTITEST
EN-95
In presence of distorted voltages and currents the previous relations vary as follows:
Phase Active Power:
(n=1,2,3)
)(IVP n
k
n
k
n
k
k
n
cos
0
Phase Apparent Power:
(n=1,2,3)
nnNnIVS
Phase Reactive Power:
(n=1,2,3)
22 nnn PSQ
Phase Power Factor:
(n=1,2,3)
n
n
n
FS
P
P
Distorted Power Factor
(n=1,2,3)
dPFn=cosf1n= phase displacement between the
fundamentals of voltage and
current of n phase
Total Active Power:
321 PPPPTOT
Total Reactive Power:
321 QQQQTOT
Total Apparent Power:
22 TOTTOTTOT QPS
Total Power Factor:
TOT
TOT
TOT
FS
P
P
where:
Vkn = RMS value of kth voltage harmonic between n phase and Neutral.
Ikn = RMS value of kth current harmonic of n phase.
fkn= Phase displacement angle between kth voltage harmonic and kth current harmonic of
n phase.
Note:
It is to be noted that the expression of the phase Reactive Power with non sine waveforms,
would be wrong. To understand this, it may be useful to consider that both the presence of
harmonics and the presence of reactive power produce, among other effects, an increase
of line power losses due to the increased current RMS value. With the above given relation
the increasing of power losses due to harmonics is added to that introduced by the
presence of reactive power. In effect, even if the two phenomena contribute together to the
increase of power losses in line, it is not true in general that these causes of the power
losses are in phase between each other and therefore that can be added one to the other
mathematically.
The above given relation is justified by the relative simplicity of calculation of the same and
by the relative discrepancy between the values obtained using this relation and the true
value.
It is to be noted moreover, how in case of an electric installation with harmonics, another
parameter called distorted Power Factor (dPF) is defined. In practice, this parameter
represents the theoretical limit value that can be reached for Power Factor if all the
harmonics could be eliminated from the electric installation.
AMPROBE
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EN-96
16.8.1. Conventions on powers and power factors
As for the recognition of the type of reactive power, of the type of power factor and of the
direction of the active power, the below conventions must be applied. The stated angles
are those of phase-displacement of the current compared to the voltage (for example, in
the first panel the current is in advance from 0° to 90° compared to the voltage):
Equipment under test = Inductive Generator
Equipment under test = Capacitive Load
90°
180°
P+ = 0
Pfc+ = -1
Pfi+ = -1
Qc+ = 0
Qi+ = 0
P - = P
Pfc - = -1
Pfi - = Pf
Qc- = 0
Qi - = Q
P+ = P
Pfc+ = Pf
Pfi+ = -1
Qc+ = Q
Qi+ = 0
P - = 0
Pfc - = -1
Pfi - = -1
Qc- = 0
Qi - = 0
0°
P+ = 0
Pfc+ = -1
Pfi+ = -1
Qc+ = 0
Qi+ = 0
P - = P
Pfc - = Pf
Pfi - = -1
Qc- = Q
Qi - = 0
P+ = P
Pfc+ = -1
Pfi+ = Pf
Qc+ = 0
Qi+ = Q
P - = 0
Pfc - = -1
Pfi - = -1
Qc- = 0
Qi - = 0
270°
Equipment under test = Capacitive Generator
Equipment under test = Inductive Load
where:
Symbol
Significance
Remarks
P+
Value of the active power +
Positive parameter
(user)
Pfc+
Capacitive power factor +
Pfi+
Inductive power factor +
Qc+
Value of the capacitive reactive power +
Qi+
Value of the inductive reactive power +
P-
Value of the active power -
Negative parameter
(generator)
Pfc-
Capacitive power factor -
Pfi-
Inductive power factor -
Qc-
Value of the capacitive reactive power -
Qi-
Value of the inductive reactive power -
Value
Significance
P
The active power (positive or negative) is defined in the panel and therefore acquires the value
of the active power in that moment.
Q
The reactive power (inductive or capacitive, positive or negative) is defined in the panel and
therefore acquires the value of the reactive power in that moment.
Pf
The power factor (inductive or capacitive, positive or negative) is defined in the panel and
therefore acquires the value of the power factor in that moment.
0
The active power (positive or negative) or the reactive power (inductive or capacitive, positive
or negative) is NOT defined in the panel and therefore acquires a null value.
-1
The power factor (inductive or capacitive, positive or negative) is NOT defined in the panel.
AMPROBE
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16.8.2. 3 Phase 3 Wire System
In the electrical systems distributed without neutral, the phase voltages and the power
factors and phase cos lose importance. Only the phase-to-phase voltages, the phase
currents and the total powers remain defined.
Phase 1
Phase 2
Phase 3
W 1-2 VAR 1-2
W 3-2 VAR 3-2
Three-phase
Equipment
In this case the potential of one of the three phases (for example, phase 2) is taken on as
reference potential. The total values of the active, reactive and apparent power are
expressed as sum of the indications of the couples of Wattmeters, VARmeters and
VAmeters.
2
2321
2
2321
2321
2321
VARVARWWS
VARVARQ
WWP
TOT
TOT
TOT
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16.9. MEASURING METHOD: OUTLINES
The instrument is able to measure: voltages, currents, active powers, inductive and
capacitive reactive powers, apparent powers, inductive and capacitive power factors,
analogic or impulse parameters. All these parameters are analyzed in a digital way: for
each phase (voltage and current), 6 x 128 samples are acquired on a module of 16 x
20ms, repeated for the three phases.
16.9.1. Integration periods
The storage of all the data would require a huge memory capacity.
Therefore we’ve tried to find out a storage method that compresses the information to be
memorized, while providing significant data.
The chosen method is that of integration: after a certain period called “integration period”,
which can be set from 5 seconds to 60 minutes (3600sec), the instrument extracts from
the sampled values the following data:
Minimum value of the parameter during the integration period (harmonics excluded)
Medium value of the parameter (intended as arithmetic average of all the values
registered during the integration period)
Maximum value of the parameter during the integration period (harmonics excluded)
Only this information (repeated for each parameter to be memorised) is saved in the
memory along with starting time and date of the integration period.
Once these data are memorized, the instrument restarts to take measurements for a new
period.
16.9.2. Power factor calculations
According to the standards in force, the medium power factor can’t be calculated as
average of the instantaneous power factors. It must be obtained from the medium values
of active and reactive power.
Each single medium power factor (of phase or total) is therefore calculated, at the end of
each integration period, on the medium value of the corresponding powers independently
on the fact that they must be registered or not.
Besides, for a better analysis of the type of load present on the line and in order to have
terms of comparison when studying the invoicing of the low cos, the values of inductive
and capacitive cos are treated as independent parameters.
16.9.3. Voltage Anomalies and Periods Analysis comparison
If You want to compare Voltage Anomaly and Periods Analysis results You should note that::
1. Voltage anomalies calculate RMS values over 10ms time while Periods Analysis
calculate MAX, MIN, RMS value over a module of 16 waveforms (16 x 16.66ms =
0.266ms). This generally implicates different values between Voltage Anomalies and
Periods Analysis results because the "Integration" time is different.
Example:
Integration Time = 60sec
If Your signal consists of 3600 waveforms (7200 half waveforms) and only the first half
waveform reach 246,6V while 7199 half waveforms stay at 240.6V You will get:
Voltage anomaly = 246.6V
Max of Periods analysis = 240.79V
AVG of Periods analysis = 240.6008V
MIN of Periods analysis = 240.6V
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2. The Voltage anomalies routine "starts" a Voltage anomaly if the RMS value (calculated
over 10ms) is over/under the High/low Threshold and "stops" it when the RMS value
(calculated over 10ms) is under/over the High/low Threshold +/- 3% of Threshold
(where 3% is a fixed percentual of High / Low threshold which introduces an hysterisis
between "Start" and "Stop" voltage values).
Example: Vref =230V +/- 6% -->
High Threshold for start = 243.8, High Threshold for stop: = 243.8 - 7.3 = 236.5V.
Low Threshold for start = 216.2, Low Threshold for stop: = 216.2 + 6.5 = 222.7V.
3. The voltage anomalies routine informs you about:
a. Starting time of the Voltage anomaly
b. Duration
c. Extreme RMS value (calculated over 10ms) during the whole Voltage anomaly.
Example: a voltage anomaly of
Extreme= 246.6V
Duration =20244,09s
means that:
i): during 20244,09s the RMS voltage value reached 246,6 for 10ms
ii): during 20244,09s the RMS voltage value (calculate over 10ms) was over 236.5V
(High Threshold for stop)
4. Both Voltage anomalies routine and Periods routines have an accuracy of +/- (0.5% rdg
+ 2dgt). As the routines, the calculation, rounding, etc are different in order to compare
the results, You should consider a double global uncertainty. So theoretically a nominal
voltage of 245.2V could become:
a. 246,6V (245.2 + 1.433) measured by Voltage Anomalies routine
b. 243.7V (245.2 - 1.433) measured by Periods Analysis routine.
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17. APPENDIX 1 – MESSAGES DISPLAYED
Message
Description
Advices
AUTONOM:
Available memory autonomy for the recording which is
being effected
CLEAR ALL? (Enter)
The operator is trying to cancel all the recordings effected
Press ESC in order not to cancel the whole
memory, press ENTER to confirm
CLEAR LAST? (Enter)
The operator is trying to cancel the last recording effected
Press ESC in order not to cancel the last
recording, press ENTER to confirm
Data saved
The data have been saved
DATA SIZE:
Dimensions of the stored data
HOLD
By pressing the proper key, the HOLD function has been
activated
Press HOLD again to disable this function
Password:
A recording has been started and at least 5 minutes have
passed from the last activity of the instrument (see
paragraph 7.1.6).
Insert the password:
F1, F4, F3, F2
Invalid date
The inserted date is not correct
Check the inserted date
Energy Measuring
The instrument is taking an energy measurement
Press F1 to stop it
Memory Full
The memory of the instrument is full
Cancel some recordings after transferring
them to a PC
No ext supply!
A recording has been started without connecting the
external power supply (optional code A0051)
Verify it you really want to start the recording
without the external power supply. In that
case press START again.
No parameter sel
A recording has been started without selecting any value to
be recorded
Press START/STOP and select at least a
value entering the MENU
No Phase selected
Voltage and/or current harmonics have been selected and
the corresponding flag has been enabled (HARMONICS
ON) but no phase voltage or current has been selected
Select at least one phase voltage and/or
current
PASSWORD ERROR
The inserted password is wrong (see paragraph 10.3).
Check the password
PASSWORD OK
The inserted password is correct
Please wait
The instrument is waiting for the recording to be started
(see paragraph 10.1)
Recording
The instrument is recording (see paragraph 10.2)
Too many param
More than 63 parameters have been selected (harmonics
included) or More than 38 parameters with CO-
GENERATION Flag enabled
Deselect some values
Too many records
The quantity of recorded data + Smp exceeds the
maximum allowed (35)
Cancel some recordings after transferring
them to a PC
No Unit selected
ERR: SEQ
The Phase Sequence isn’t correct.
Check the Phase Sequence connection.
ERR: P-
The active powers shown on the right side of the message
are negative
If there isn’t a situation of co-generation
check if the clamps are properly connected
ERR: SEQ & P-
The active powers shown on the right side of the message
are negative and the Phase Sequence isn’t correct.
If there isn’t a situation of co-generation
check if the clamps are properly connected /
check the Phase Sequence connection.
ERR: CONNECTION
The instrument has detected a wrong connection to
Voltage inputs
Check the Voltage connections
Error Vref
The user set a Voltage reference not compatible with
voltage at instrument’s input.
Check Voltage Reference set in “CONFIG
RECORDER”
ERR: SYNC
The System Frequency is out of range
Check the System Frequency, check setting
in ANALYZER CONFIG.
Error1 Error 5
Contact assistance
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18. APPENDIX 2 – RECORDABLE PARAMETERS: SYMBOLS
Symbol
Description
V1, V2, V3
RMS value of the voltage of phase 1, phase 2, phase 3 respectively
V12, V23 V31
Value of phase to phase voltages
I1, I2, I3
RMS value of the current of phase 1, phase 2, phase 3 respectively
IN
RMS value of the current of the neutral
DC
Continuous component of voltage or current
h01 h49
Harmonic 01 Harmonic 49 of voltage or current
ThdV
Factor of total harmonic distortion of the voltage (see paragraph 16.7)
ThdI
Factor of total harmonic distortion of the current (see paragraph 16.7)
Pt, P1, P2, P3
Values of the total active power, of phase 1, phase 2, phase 3 respectively
P12, P32
(only for 3 wires measurement) Value of the power measured by the Wattmeter 1-2
and 3-2 respectively (see paragraph 16.8.2).
Qt, Q1, Q2, Q3
Values of the total reactive power, of phase 1, phase 2, phase 3 respectively
Q12, Q32
(only for 3 wires measurement) Value of the power measured by the VARmeter 1-2
and 3-2 respectively (see paragraph 16.8.2).
St, S1, S2, S3
Values of the total apparent power, of phase 1, phase 2, phase 3 respectively
S12, S32
(only for 3 wires measurement) Value of the power measured by the VAmeter 1-2
and 3-2 respectively (see paragraph 16.8.2).
Pft, pf1, pf2, pf3
Value of the total power factors, power factors of phase 1, phase 2, phase 3
respectively
dPft, dpf1, dpf2, dpf3
Values of the total cos, of phase 1, phase 2, phase 3 respectively
Eat, Ea1, Ea2, Ea3
Values of the total active energy, of phase 1, phase 2, phase 3 respectively
Erit, Eri1, Eri2, Eri3
Values of the total inductive reactive Energy, of phase 1, phase 2, phase 3
respectively
Erct, Erc1, Erc2, Erc3
Values of the total capacitive reactive Energy, of phase 1, phase 2, phase 3
respectively
Est, Es1, Es2, Es3
Values of the total Apparent Energy, of phase 1, phase 2, phase 3 respectively
Miramar, FL
Phone: 954-499-5400
Fax: 954-499-5454
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