Features and Benefits
PH-100A tachometer incorporates the latest microprocessor technology and offers:
xMultiple measurement types: total revolutions (rev); revolutions per minute (rpm); surface
speed: m/min, y/min, in/min, ft/min; and length: meters, yards, feet and inches.
xCompact, pocket-size design
x14 reading memory: minimum, maximum, final, 10 selectable measurements and an average of
memory measurements, up to ten.
xEnergy-saving design allows long battery life and continuous operation.
xThe tachometer automatically converts between units of measurements by pressing the UNIT
button.
Important Safety Instructions
xRead entire instruction manual before using this tachometer.
xBe sure to store this manual in a safe place.
xWhen using the master wheel, do not use an extension shaft as the wheel may come off of the
shaft and cause damage or injury.
xAlthough the tachometer is able to achieve higher measurements than what is listed, the master
wheel has a maximum speed limitation of 1500 m/min (for safety reasons).
Display
M
N
O
P
(1) POWER switch: Turns the tachometer on and records measurements.
(2) Display section: Displays measurements
(3) UNIT switch: Selects the type of measurement to be made
(4) MEM switch: Stores and cycles through memory.
(5) Cone adapter (Not shown): Used for Contact rpm and rev measurements
(6) Funnel adapter (Not shown): Used for Contact rpm and rev measurements.
(7) 6" Circumference Wheel (Not shown): Used for Contact surface speed and length measurements.
Dimensions
Standard Accessories
Description Dimension Drawing
Cone Adapter, Standard D =12.5mm
Funnel Adapter, Standard D = 12.5mm
Master Wheel FPM (6” cir) D = 48.53mm
NO
M
P
M Low battery display: When the battery is weak, "LO BAT" will flash.
N Tachometer's display: Displays measuring units.
O Max/Min display: Displays minimum and maximum value.
P Main display: 5 digit LCD displays measurement readings
Operation
Contact measurements
Measuring rotation speed using the cone or funnel-shaped contact probe.
1. Select the cone or funnel adapter and slide it onto the end of the shaft. Align the notch in the
cone/funnel adapter with the alignment pin on the shaft.
2. Press the POWER button on the side of the tachometer, the LCD display will turn on.
3. Select "RPM" or "REV" depending on whether you wish to measure revolutions per minute or
total number of revolutions by pressing the UNIT button.
4. Press and hold down the POWER button to start measuring.
5. Bring the contact probe into contact with the object to be measured by touching the contact
probe slowly to the center of the rotating object. Note: If the measuring range of the tachometer
is exceeded, "OVR" will appear on the tachometer's display.
6. Press and hold the POWER button to take another measurement.
7. To convert the units of measurements between ranges, simply press the UNIT button.
8. The POWER will automatically turn off after five minutes if there are no additional
measurements made.
Caution: When a high-speed rotating object is measured for hours using a cone or funnel-shaped
contact probe the surface of the probe in contact with the object may become very hot.
Measuring surface speed and distance using the master 6" circumference wheel.
1. Attach the 6" circumference wheel to the contact shaft insuring that the alignment pin on the
shaft is securely aligned with the notch of the 6" circumference wheel.
2. Press the POWER button on the side at the tachometer, the LCD display will turn on.
3. Select meters/minute [m/M], yards/minute [Y/M], inches/minute [I/M], feet/minute [F/M],
meters [m], yards [YRd], inch [IN], or feet [FT] depending on which units you wish to measure
by pressing the UNIT button.
4. Bring the 6" circumference wheel into contact with the object to be measured by slowly
touching the contact wheel to the moving object.
5. Press and hold down the POWER button to start measuring.
6. Release the POWER button to stop measuring.
7. To convert the units of measurements between ranges, simply press the UNIT button.
Caution: When making surface speed or distance measurements, insure that the 6" circumference
wheel's perimeter is parallel to the object to be measured. Do not push the wheel against the object
with great force.
Note: When using the master wheel, accuracy can be affected as much as 0.4% of reading.
MEMORY FUNCTION
This tachometer's memory capabilities include minimum, maximum, last measurement, 10
selectable measurements and an average of the memory measurements.
1. Minimum, maximum and last measurements are recorded automatically by the tachometer.
2. Ten selectable measurements can be programmed into memory by pressing the MEM button
while the POWER button is fully depressed (M1, M2, M3, … M10).
3. The average value of sequentially stored memory, up to ten, can be viewed by pressing the
memory button.
Note: if the memory button (MEM) is not selected while the POWER button is pressed the
measurement will not be recorded into its memory location, The memory will be recorded
automatically into memory if the measurement made is the maximum, minimum or last
measurement.
To delete stored memories do one of the following:
1. Press the MEM button for five seconds or more. All memory will be erased after [CCCCC] is
displayed.
2. Changing the units of measurements and then making additional measurements.
3. Memory will be automatically erased if the TACHOMETER turns off automatically after five
minutes.
BATTERY REPLACEMENT
When "LO BAT" flashes on the display, replace the batteries with new ones.
To replace the batteries, slide the battery cover located on th e rear of the tachometer. Remove the
old batteries and insert three new batteries while observing proper polarity. Replace the rear cover
of the tachometer (dispose of old batteries properly).
Notes:
1. Do not mix old and new batteries.
2. When replacing the batteries, use AA batteries.
3. The Tachometer may be damaged if liquid leaks from the batteries. This may happen if the
batteries are left inside the tachometer's enclosure for long periods of time. Remove the batteries
after using the tachometer, and store them in the carrying case.
Troubleshooting
No Display:
xConfirm that the POWER button is operating properly.
xConfirm that the batteries are functioning properly and that they are inserted into the tachometer
with correct polarity.
Specifications
Model PH-100A
Display 5 digit 12 mm height LCD
Revolutions per Minute (rpm) 1.0 - 25,000
(m/min) 0.1 - 3,809.8
(yards/min) 0.1 - 4,166.4
(inch/min) 3 - 99,999
Surface Speed
(Using 6" Wheel)
(feet/min) 0.2 - 12,499
(m) 0.01 - 99,999
(yards) 0.01 - 99,999
(feet) 0.1 - 99,999
Length
(Using 6" Wheel)
(inch) 1 - 99,999
Total number of revolutions (rev) 0.1 - 99,999
Measuring Accuracy Revolution 1.0 - 599.9 rpm: ±1 rpm, 600 - 25,000 rpm: ±0.006% and ±0.5 digit
Surface Speed, Length 0.4% and ±1 digit
Memory function 14 readings are stored in memory and retained for 5 minutes
(Last, Max., Min., Average, and 10 selectable measurements)
Update Time 1 second
Detection Optical coupler, 20 pulses per revolution
Auto POWER Off function 5 minutes
Batteries Included 3 AA 1.5V
Low Battery Indicator Flashing "LO BAT" display
Over Range Indicator Flashing "OVR" display
Operating Temperature 0 - 45ºC
Construction ABS resin
Outside dimensions 122.5 mm L x 64 mm W x 31.5 mm H
Weight 0.37 lb (170 g)(including batteries)
Accessories Carrying Case, Cone Adapter, Funnel Adapter, Master Wheel (6" cir.),
Certificate of calibration, Operation Instructions
Manufactured by
䣐䣋䣆䣇䣅䢯䣕䣊䣋䣏䣒䣑䢢䣅䣑䣔䣒䣑䣔䣃䣖䣋䣑䣐䢢
1 Terada, Kohtari, Nagaokakyo-city, Kyoto, 617-0833 Japan
Phone: +81-(0)75-958-3608 Fax: +81-(0)75-958-3647
