DC POWER SUPPLY GPR-MIDDLE SERIES (ANALOG / DIGITAL TYPE) SAFETY TERMS AND SYMBOLS These terms may appear in this manual or on the product: WARNING. Warning statements identify condition or practices that could result in injury or loss of life. CAUTION. Caution statements identify conditions or practies that could result in damage to this product or other property. The following symbols may appear in this manual or on the product: A & A DANGER DANGER ATTENTION Protective Equipotentiality High Voltage Hot Surface refer to Manual Conductor Terminal 82PR-30600M ICONTENTS SECTION PAGE 1. INTRODUCTION 2.0. cc et ee ee tee meee ee eee eee eee ee eee eee eee tees 1 2. SPECIFICATIONS 2.0... ccc ce cette eee ee ete eens Mckee cence ences nen enees 2 2-1 General... ee ee be ee eee ee eee ee eee ee tenn ens 2 * 2-2 Constant Voltage Operation .. 0. ee eee ee ete eee eee ee tte wee ees 3 2-3. Constant Current Operation ............00005 Ce te eee ee ete ee eee eee eee eee 3 24 Indicator Meter... 0... ee ee ee ee eee eee eee eee eee e eee ne 3 2-5 Insulation 2... ee ee ee ee eee eee eee etn eee ee ee eee eens 4 3. THEORY OF OPERATION, .. 0.0... cc ccc cc ce cee ee ete te eee eee eee eee eet t tent e ones 4 4. PANEL CONTROLS AND INDICATORS. ........ 0.0.0 cece eee te eee tenet cece ee eee sees 6 4-1 FrontPanel . 0.0... oc ee ee ee ee ee ee ee eect ne ee eee tee eee net nee ee 6 4-2 RearPanel.. 0... 0.0 cee ec ee ee ee eens eee ee eee ee eee eee ee tenes 6 5. OPERATION INSTRUCTIONS, .. 0... cc ccc ce ee ce eee eee ee etre eee e ence eee ene teeee 10 5-1 Precaution. 2.0... ee ee ee ee eee eee et ete e eee nee eee ee eee ened eee 10 5-2 Setting Current Limit. 2... 0. ce ee ee net eee ete eee ees bene eae 10 5-3 Constant Voltage/Constant Current Characteristic. ... eee tenet eee 10 54 OperationMode ... 20.0... 00. ee ee ee ee eee eee eee eee eee nent eens 11 6. MAINTANCE... 0.0... 2c eee ee eee ee tenet nes ee eee eee eee eee nee eens 13 6-1 Fuse Replacement.................. ee ee ee ee eee ee ee ee eee ee 13 6-2 Line Voltage Conversion. 0. ee eee ene ee eee eee eee e eee 13 6-3 Adjustments ...............00-. eee eee eee ee eee eee nee 13 6-4 Cleaning1. INTRODUCTION The regulated DC power supply have been designed to provide the most often required in the laboratory, schools and production lines. The output voltage is continuously adjustable between O to rating voltage in one range by means of a coarse and fine potentionmeter, the ioad current may have any value from 0 to rating current and adjusted by means of a coarse and fine potentionmeter. Both outputs can accurately read on voltmeter and ammeter. Both stability and ripple are extremety good to meet the requirements of modern circuit design. The unit can be used as either constant voltage or current source. The various operation mode are described in more detail in the Operation Instruc- | tion section. | For applications when outputs greater than rating V is need, the unit can be connected up in series. | For applications in audio production lines, the continuous or dynamic load internal selectable.2. SPECIFICATIONS 2-1 General Main supply 100V/120V/220V/240V + 10 % 50/60 Hz (Switch selectable} Rating, dimension and weight see Table 2-1. Table 2-1 Max. Rating Input Rating FUSE Type and Rating Weight MODEL Volts (V) Amps (A) Watts VA 100V/120V 220V/240V (Kg) GPR-1810H/1810HD 18 10 390 480 T 8A 250V T 4A 250V 11.5 GPR- 3060/3060D 30 6 360 450 |}T 6A 250V |T 3A 250V 11.5 GPR- 6030/6030D 60 3 360 450 |T 6A 250V | T 3A 250V 11.5 Dimensions: 255 (W) x 145 (H) x 335 (D): mm Operation Mode Single Operation, Series Operation Operation Environment Indoor use Altitude up to 2000m Installation Category Il Pollution degree 2 Operation Temperature & OC to 40C, < 80% Humidity Storage Temperature & -10C to 70C, < 70% Humidity Accessories Test Lead GTL-105 (current < 4A)... eens x1 GTL-104 (4A<currents10A) Operation Manual... eee terest ee eres eter eeeteeets x12.2 (1) (2) (3) (4) (5) 2-3 (1) {2) (3) 24 (1) (2) Constant Voltage Operation Output voltage ranges o-rating voltage continuously adjustable. Voltage regulation line regulation<0.01%+3mV load regulation <0.01%+5mV load regulation<0.02%+5mV (210A) Recovery time < 100 us. (50% load change, minimum load 0.5A) Ripple & Noise < 1mV rms (5Hz~1MHz) Temperature coefficient <300PPM/C Constant Current Operation Output current range 0 to rating current continuously adjustable. Current regulation line regulation < 0.2%+3mA load regulation < 0.2%+3mA Ripple current < 3mA rms Indicator Meter Digital Type Display: 3% Digits 0.5" Red LED Disptay. Accuracy: +(0.5% of rdg + 2 digits) Voltage range: 19.99V of full scale (rating voltage <18V). 199.9V of full scale (rating voltage =>20V) Current range: 1.999A of full scale (rating current <2A). 19.99A of full scale (rating current >2A). Analog Type Meter: Voltmeter and Ammeter each one Class: 2.5 Dimensions: 60x80 m/m2-5 Insulation Between chassis and output terminal 20M2Q or above (DC 500V) Between chassis and AC cord 30MQ or above (DC 500V) 3. THEORY OF OPERATION The power supply consists of an AC input circuit and transformer, a bias supply consisting of a rectifier and filter and reference voltage source, a main regulator circuit consisting of the main retifier and filter, a series regulator, a current com- parator, a voltage comparator, a reference voltage amplifier, tag a instant over load prote~*ion circuit and a relay control circuit. The circuit element are several of integrated circuit (U201, U202, U203, U204, U101). The circuit arrangement is shown in block diagram from Fig. 1. The circuit is discussed with reference to the block diagram Function Description. Single phase input power is applied to transformer through the input circuit. Auxiliary rectifier 0102A~D provides a bias voltage filtered by capactor C103, C104 for the preregulator U101,Q101, Q102, that provides a regulator voltage for element of action. The main retifier, a full wave bridge rectifier, provides the power which is filtered by capacitor C101, C102 and then regulated via a series regulator and deliver to the output. U204 acted as a current limter. When current is over predominate rating, it acted and decreased the current. U201 provides a reference voltage for U202, U204. U202 is a invertor amplifier, U204 is a comparator amplifier. Its may be made comparator for reference voltage and detector feedback voltage, and then deliver to Q201, Q202, this time output voltage is calibrated. 0204 is instant over load protection circuit, Q204 turn on when voice response load adds at instant. It controls Q201 current magnitude of |, makes output current limited. , The relay control circuit provides limited power dissipation in series regulator. ~ 4 -ac INPUT Aux REP eRENCE RECTINIER vOLTaGe ANG PiLTER TRANSFORMER Bounce D102A~D,U101 rien URo4 9101, Q10z Main Rear OA CURRENT een AMPLISIER RECTIFIER CONTROL COMPARATOR ATE pees. o208 oz01,a202 AND FILTER Q@301 a3z202 u20a Da, D204, , 80101, C104, 9303,a3048,0308, C102 R101 AL301,RAL302 senes a REGULATOR > 7 O203 , Ra2s ~ REreneNce VOLTAGE INSTANT Oe aan COmMPaRATOR oven /OAG AMPLIF! Ueos PROTECTION uaoe . a204 L Fig. 1 Block Diagram4. PANEL CONTROLS AND INDICATORS 4-1. Front panel 1) CV indicator (2) CC indicator (3) Voltage coarse (4) Voltage fine (6) Current coarse oO OIBNIE Current fine + output terminal GND terminal "" output terminal Voltmeter Ammeter Power contrul (BVO Who 4-2. Rear panel 13) Fuse holder 44) Power cord 45 HI-LO switch 46 AC selects switch lights when the power turn on and constant voltage operation. lights when this unit in constant current operation. for the coarse adjustment of the output voltage. for the fine adjustment of the output voltage. for the coarse adjustment of the output current. for the fine adjustment of the output current. positive polarity. (Red) Earth and chassis ground (green). negative polarity. (Black) indicates the output voltage (Digital pane! meter or Analog meter} indicates the output current (Digital panel meter or analog meter) on/off switch. HI position selects high voltage range (120V, 240V AC inputs), LO position selects low voltage range (100V, 220V AC inputs). With 45) HI-LO switch selects to permit operation from 100, 120, 220 or 240V AC, 50/60HZ line voltage.P79 & LABORATORY DC POWER SUPPLY GW INSTEK GPR-6030D IO 0) 6 U0 COARSE COARSE CURRENT C. v. VOLTAGE O~60V, O~ 3A 12 6 5)(9) (8) (7)C4 3 Fig. 4-1 Front Panel (Digital Type) -7-Y PO LABORATORY DC POWER SUPPLY GW INSTEK GPR-3060 CURRENT 12 6 COARSE COARSE VOLTAGE 53)(9) (8) (7)(4 3 Fig. 4-2 Front Panel (Analog Type) -B-MB AC LINE SELECT Mj Lay \ oe a 100V | a 220V 120V | =e 240V Se @ @ UNE | FUSE | FREQ [| POWER toov | 76.34 v2av | 2sov | sour | 36 4S0VA 220v {T3.15A] SCH2 | yyy 240v | 250v Nd AC REGULATION. (J COMPLIANCE WITH ENGIO10-1 FIG. 4-3. REAR PANEL -9- Cor5. OPERATION INSTRUCTIONS 5-1 Precaution (1) AC input AC input should be within the range of line voltage + 10% 50/60Hz. WARNING. To avold electrical shock, the power cord protective grounding conductor must be connected to ground. (2) Installation Avoid using the supply in a place where the ambient temperature exceeds 40C. The heat sink located at the rear of the supply must have sufficient air space for radiation. CAUTION. To avoid damaging the power supply, don't use it in a place where ambient temperature exceeds 40C. (3) Output voltage overshoot Voltage between output terminals never exceeds the preset value when the power is turned on or off. 5-2 Setting Current Limit (1) Determine the maximum safe current for the device to be powered. (2) Temporarily short the (+) and () terminals of the power supply together with a test lead. (3) Rotate the COARSE VOLTAGE control away from zero sufficiently for the CC indicator to light. (4) Adjust the CURRENT control for the desired current limit. Read the current value on the Ammeter. (5) The current limit (overload protection) has now been preset. Do not change the CURRENT control setting after this step. (6) Remove the short between the (+) and () terminals and hook up for constant voltage operation. 5-3 Constant Voltage/Constant Current Characteristic The working characteristic of this series Power Supplies is cailed a constant voltage/constant current automatic cross- over type. This permits continuous transition from constant current to constant voltage modes in response to the load change. The intersectior. of constant volatge and constant current modes is called the crossover point. Fig. 5-1 shows the relationship between this crossover point and the load. For example, if the load is such that the power supply is operating in the constant voltage mode, a regulated output voltage is provided. The output voltage remains constant as the load increases, up until the point where the preset current limit is reached, At that point, the output current becomes constant and the output voltage drops in proportion to further - 10 -increases in load. The crossover point is indicated by the front panel LED indicators. The crossover point is reached when the CV indicator goes off and the CC indicator comes on. Vo MAX Constant Current , Range To Max > 4 > ~# > + NN r S crossover Point 4 Output P eae, Voltage Rai v Output Current Fig. 5-1 Constant Voltage/Constant Current Characteristic. Similarly, crossover from the constant current to the constant voltage mode automatically occurs from a decrease in load. A good example of this would be seen when charging a 12-volt battery. Initially, the open circuit voltage of the power supply may be preset for 13.8 volts. A low battery will place a heavy load on the supply and it will operate in the constant current mode, which may be adjusted for a 1 amp charging rate. As the battery becomes charged, and its voltage approaches 13.8 volts, its load decreases to the point where it no longer demands the full 1 amp charging rate. This is the crossover point where the power supply goes into the constant voltage mode. 5-4 Operation Mode / (1) Single Operation Use the supply as it is for single operation.(2) Set Power switch to OFF position. Make sure that line voltage is correct for the input power voltage. Piug power cord into the power outlet. Set Power switch to ON position. Adjust Voltage and Current contro! to the desired output voltage and current. Connect the external load to the output binding posts. Make sure both + and terminals are connected correctly. Series Operation Two power supplies may be connected in series to provide higher voltage and rating current output. See Fig. 5-2 for the connection scheme. When connected in series, the VOLTAGE controls of each power supply exercise control over a 0 to rating range. Add the two voltmeter readings together to determine the total output voltage, or an external voltmeter may be con- nected across the load. Load current may be monitored from either supply; the readings will be identical since they are connected in series. Also, since the supplies are connected in series, it is only necessary to set the current limit on one of the supplies: the other may be set for maximum. MMGOOB D> +@- POWER SUPPLY CONNECTED [oad L_| POWER. SUPPLY - Fig. 5-2 Connecting Two Power Supplies in Series: -~12-6. MAINTENANCE WARNING The following instructions are for use by qualified personnel only. To avoid electrical shock, do not perform any servicing other than contained in the operating instructions unless you are qualified to do so. 6-1 Fuse Replacement If the fuse blows, the CV or CC indicators will not light and the power supply will not operate. The fuse should not normally open unless a problem has developed in the unit. Try to determine and correct the cause of the blown fuse, then replace only with a fuse of the correct rating and type. The fuse is located on the rear panel (see Fig. 4-3). A WARNING. For continued fire protection. Replace fuse only with 250V fuse of the specified type and rating, and disconnect the power cord before replacing fuse. 6-2 Line Voltage Conversion The primary winding of the power transformer is tapped to permit operation from 100, 120, 220, or 240 VAC, 50/60 Hz line voltage. Conversion from one tine voltage to another is done by change AC selects switch as shown in Fig. 4-3. The rear panel identifies the line voltage to which the unit was factory setted. To convert to a different line voltage, perform the following procedure: (1) Make sure the power cord is unplugged. (2) Change the AC selects switch to the desired line voltage position. (3) A change in line voltage may also require a corresponding change of fuse value. Install the correct fuse value ag listed on rear panel. 6-3. Adjustments This unit was accurately adjusted at the factory before shipment. Readjustment is recommended only if repairs have been made in a circuit affecting adjustment accuracy, or if you have a reason to believe the unit is out of adjustment. How- ever, adjustments should be attempted only if a multimeter with an accuracy of +0.1% dcv or better is available (GOOD WILL Model GDM- 8135 or equivalent),(1) (2) If readjustment is required, use the following procedure. Locations of the adjustments are shown in Fig. 6-1 and FIG. 6-2. Adjustment of the Rating Voltage A. TTAMNMGONM>DP OMMIOOD Connect an accurate (40.1%) external multimeter to measure the de voltage at output terminals of the power supply. Set the COARSE and FINE VOLTAGE controls to minimum (fully counterclockwise). Adjust trimmer pot VR 204 for a reading of 0 volts on. the multimeter. Turn the COARSE and FINE VOLTAGE controls to maximum (fully clockwise). Adjust trimmer pot VR201 for a reading of rate volts x1.05 on the multimeter. Set the COARSE and FINE VOLTAGE controls for a reading of rate volts on the multimeter. Adjust trimmer pot VR207 (VR201 digital type) for a reading of rate volts on the volt meter (Digital Panel meter, digital type) of the power supply. djustment of the Rating Current Set the CURRENT control to minimum (fully counterclockwise). Connect the external multimeter to measure de current at the output terminals of the power supply. Set the COARSE and FINE CURRENT controls to minimum (fully counterclockwise). Adjust trimmer pot VR301 for reading of 0 amps on the multimeter. Set the COARSE and FINE VOLTAGE controls to a centered position. Setting and turn the COARSE and FINE CURRENT controls to maximum (fully clockwise). Adjust trimmer pot VR205 for a reading of rate amps x 1.05 on the multimeter. Readjust the CURRENT control for a reading of rate amps on the multimeter. Adjust trimmer pot VR208 (VR202 digital type) to calibrate the Ammeter (Digital panel meter, digital type) of the power supply for the same reading as the multimeter. 6.4 Cleaning To clean the power supply,use a soft cloth dampened in a solution of mild detergent and water. Do not spray cleaner directly onto the instrument, since it may leak into the cabinet and cause damage. Do not use chemicals containing benzine, benzene, toluene, xylene, acetone, or similar solvents. Do not use abrasive cleaners on any portion of the instrument. - 14 -U601 D ve FIG. 6-1 - 15 - U201 VR201901r +3 vSTTH 3 8 9 eStZye 2 g z3 TSCTY 13 - IS&ay RL302 2 RL3O1 VR201 VR205 AAD = FIG. 6-2 - 16 -FOR UNITED KINGDOM NOTE This lead/appliance must only be wired by competent persons WARNING THIS APPLIANCE MUST BE EARTHED IMPORTANT The wires in this lead are coloured in accordance with the following code: Green/ Yellow: Earth Blue: Neutral Brown: Live(Phase) As the colours of the wires in main leads may not correspond with the colours marking identified in your plug/appliance, proceed as follows: . The wire which is coloured Green & Yellow must be connected to the Earth terminal marked with the letter E or by the earth symbol + or coloured Green or Green & Yellow. The wire which is coloured Blue must be connected to the terminal which is marked with the letter Nor coloured Blue or Black. The wire which is cotoured Brown must be connected to the terminal marked with the letter L or P or coloured Brown or Red. . if in doubt, consult the instructions provided with the equipment or contact the supplier. This cable/appliance should be protected by a suitably rated and approved HBC mains fuse : refer to the rating information on the equipment and/or user instructions for details. As a guide, cable of 0.75mm 2 should be protected by a 3A or 5A fuse. Larger conductors would normally require 13A types, depending on the connection method used. , Any moulded mains connector that requires removal/replacement must be destroyed by removal of any fuse & fuse carrier and disposed of immediately, as a plug with bared wires is hazardous if engaged in a live socket. Any re-wiring must be carried out in accordance with the information detailed on this tabel.EC Declaration of Conformity We GOOD WILL INSTRUMENT CO., LTD. No.7-1, Jhongsing Road, Tucheng City, Taipei County 236, Taiwan GOOD WILL INSTRUMENT (SUZHOU) CO., LTD. No. 69 Lushan Road, Suzhou New District Jiangsu, China Declare that the below mentioned products GPR-1810H, GPR-1810HD, GPR-3060, GPR-3060D, GPR-6030, GPR-6030D are herewith confirmed to comply with the requirements set out in the Council Directive on the approximation of the Law of Member States relating to Electromagnetic Compatibility (89/336/EEC,92/3 1/EEC,93/68/EEC)and Low Voltage Equipment Directive(73/23/EEC, 93/68/EEC). For the evaluation regarding the Electromagnetic Compatibility and Low Voltage Equipment Directive, the following standards were applied: EN 61326-1:Electrical equipment for measurement, control and laboratory use EMC requirements(1997+A1:1998) Conducted Emission | EN 55022 class B (1994) Electrostatic Discharge |IEC 1000-4-2 (1995) Radiated Emission EN 55011 class B (1991) Radiated Immunity IEC 1000-4-3 (1995) Current Harmonics EN 61060-3-2 (1996) | Electrical Fast Transients ; IEC 1000-4-4 (1995) Voltage Fluctuations {EN 61000-3-3 (1995) |Surge Immunity IEC 1000-4-5 (1995) socecesecneescnnes fo cesereeens | crcencoott Conducted Susceptibility |EN 61000-4-6 | (1996) Power Frequency Magnetic Field EN 61000-4-8 | (1993) srcresccencncntees fmencereres | mececsnees Voltage Dip/Interruption |EN 61000-4-11| (1994) Low Voltage Directive 73/23/EEC & 93/68/EEC Low Voltage Directive |[IEC/EN 61010-1:2001 ee ee eH