DC Power Supply - produktinfo.conrad.com
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1. benzine benzene toluene xylene acetone or similar solvents Do not use H Adjust VR402 until the 3A GPS 33038 4302 2 5A GPS 4251 and 1A abrasive cleaners on any portion of the instrument GPS 4303 OVERLOAD indicator light 5 CH4 Supply Adjustment A Connect the multimeter across the output terminals of the CH4 SUPPLY to read output voltage and adjust VR603 to obtain a reading of 8 15V GPS 4302 4303 4251 on the multimeter B Set the supply VOLTAGE control to maximum fully clockwise set output off by adjusting the trimmer potentiometer VR803 from the CH4 voltage indicator circuit board located on the meter or A D converter board for a reading of rate voltage on the CH4 C Turn VR601 on the main master circuit board located on the right side of the supply fully counterclockwise D Set output on by adjusting VR902 so that the CH4 meter also reads rating amps E Connect a variable load load must be rated to handle a power of at least 30W across the output terminals and connect the multimeter to read the output current then adjust the load on the multimeter to show an output current at 1 20A 24 25 MULTI OUTPUT POWER SUPPLY USER MANUAL Fig 6 1 Adjustment Location 262. B Set the CH1 supply VOLTAGE and CURRENT controls to minimum fully counterclockwise C Connect the multimeter across the CH1 supply output terminals and measure the output current D Set the CH1 supply VOLTAGE control to midrange and adjust the CURRENT control to obtain an output current of rating amps read on the multimeter Do not change the CURRENT control setting after this step E Engaged both Tracking mode switches both switches in so that the power supply is in the parallel operating mode F Set the CH2 supply CURRENT control to maximum fully clockwise and set the VOLTAGE control to midrange G Set output on by adjusting the trimmer potentiometer VR502 on the circuit board located on the right side of the supply to obtain an output current of double rating amps on the multimeter 4 CH3 Supply Adjustment A Connect the multimeter across the output terminals of the CH3 supply to read output voltage and adjust the VR403 to obtain reading of 2 2 5 2V GPS 4302 4303 3 6V GPS 4251 and fixed 5V GPS 3303 on the multimeter B Set the supply VOLTAGE control to maximum fully clockwise set output off by adjusting trimmer potentiometer VR203 on the CH3 voltage indicator circuit board located on the meter or A D converter board for a reading of rate voltage on the CH3 invalid for GPS 3303 C Turn VR401 on the main master circuit board located on the right side of the supply fully counterclockwise 23 MULTI O
3. Outout Voltage range 4 Output current 2 8 CH4 Output Specifications 1 Regulation 2 Ripple amp Noise 3 Outout Voltage range 3 digits panel meterx2 0 5 Red LED display 3 digits panel meter x 2 0 5 Green LED display OUT ONX0 5 of rdg 2 digits OUT OFF 0 5 of rdg 8 digits When the output of the GPS 2303 is set to OFF its voltage meter and current meter can not preview 99 9V of full scale 9 994 of full scale Line regulations 5mV load regulations 15mV S2mVrms GPS 4302 4303 2 2 5 2V 18 continuous adjustment GPS 3303 fixed 5 V 18 continuous adjustment GPS 4251 3 6V 18 continuous adjustment 3A for GPS 3303 amp 4302 1A for GPS 4303 2 5A for GPS 4251 Line regulations 5mV load regulations 10mV iS 2mVrms GPS 4302 4303 4251 8 15V48 continuous adjustment MULTI OUTPUT POWER SUPPLY 4 Output current USER MANUAL 1A MULTI OUTPUT POWER SUPPLY USER MANUAL 2 9 Insulation Between chassis and output terminal 20MQ 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 an rectifier filter pre regulator and reference voltage source a main regulator circuit consisting of the main rectifier and filter a series regulator a current comparator a voltage comparator a reference voltage amplifier and a relay control circ
4. use of the CH1 and CH2 supplies only when they are used independently from each other When used in the independent operating mode the operation controls of the two power supplies are completely independent and either supply can be used individually or both can be used simultaneously A Disengage both Tracking mode switches both switches out so that the power supply is in the independent operating mode B Adjust Voltage control and Current control to the desired output voltage and current C Turn off the power supply and the equipment to be powered during hook up D Connect the positive polarity of the device being powered to the red terminal of the power supply E Connect the negative polarity of the device being powered to the black terminal of the power supply F Fig 5 2 illustrates the connection procedure Power Supply Fig 5 2 Independent Operation 14 terminal of the CH2 supply output is internally connected to the negative black terminal of the CH1 supply In the series tracking mode the maximum output voltage of both CH1 and CH2 supplies can be simultaneously varied with one control The maximum CH2 supply voltage is automatically set to the same as the CH1 supply by using the CH1 VOLTAGE controls A Set the power supplies to the Tracking series mode by engaging the left Tracking switch and release the right Tracking switch WARNING Voltage more than 60V DC has a lethal shock haz
5. 303 Select CH1 or CH3 output voltage or current invalid for GPS 23038 3303 Select CH2 or CH4 output voltage or current invalid for GPS 23038 3303 MULTI OUTPUT POWER SUPPLY 14 Overload Indicator 15 CV amp CC Indicator 16 CV amp CC Indicator 17 Overload Indicator 18 Output Indicator 19 output terminal 20 output terminal 21 output terminal 22 output terminal 23 GND terminal 24 output terminal 25 output terminal 26 output terminal 27 output terminal 28 Output switches USER MANUAL Lights when CH3 output load is larger than rating value invalid for GPS 2303 The CV light green light is on when the CH1 supply is in the constant voltage operation or when both the CH1 and CH2 supplies are in the constant voltage operation in either series or parallel tracking mode The CC light red light is on when the CH1 supply is in the constant current operation The CV light green light is on when the CH2 supply is in the constant voltage operation The CC light red light is on when the CH2 supply is in the constant current operation or in parallel tracking mode Lights when CH4 output load is larger than rating value invalid for GPS 2303 amp 3303 Switch the light on Positive polarity output terminal for the CH3 supply invalid for GPS 2303 Negative polarity output terminal for the CH3 supply invalid for GPS 2303 Positive pol
6. AR OLTAGE ae ay a P P E 4 in E TH ISS NE LS LS PA IS e E y Figure 3 1 Block Diagram e 600000 000 OOO E Fig 4 1 Front Panel 14 OM 00 ye e SS OY MULTI OUTPUT POWER SUPPLY USER MANUAL Fig 4 2 Real Panel MULTI OUTPUT POWER SUPPLY 4 1 Front Panel 1 Power switch 2 Meter V 3 Meter A 4 Meter V 5 Meter A 6 Voltage Control 7 Current Control 8 Voltage Control 9 Current Control 10 Voltage Control 11 Voltage Control 12 CH1 CH3 selects switch 13 CH2 CH4 selects switch USER MANUAL ON OFF the power input Indicated the CH1 or CH3 output voltage Indicates the CH1 or CH3 output current Indicates the CH2 or CH4 output voltage Indicates the CH2 or CH4 output current Adjust the output voltage of the CH1 supply and as the adjustment control for the maximum output voltage of the CH2 supply when either parallel or series tracking operation Adjust the output current of the CH1 supply and as the adjustment control for the maximum output current of the CH2 supply when either parallel or series tracking operation Adjust the output voltage of the CH2 supply when in independent operation Adjust the output current of the CH2 supply Adjust the output voltage of the CH3 supply invalid for GPS 2303 amp 3303 Adjust the output voltage of the CH4 supply invalid for GPS 23038 3
7. DC Power Supply GPS 2303 3303 4303 4302 4251 Multi Output USER MANUAL GW INSTEK PART NO 82PS 23030MD MULTI OUTPUT POWER SUPPLY USER MANUAL ISO 9001 CERTIFIED MANUFACTURER GUIMNSTEK This manual contains proprietary information which is protected by copyrights All rights are reserved No part of this manual may be photocopied reproduced or translated to another language without prior written consent of Good Wil company The information in this manual was correct at the time of printing However Good Will continues to improve products and reserves the rights to change specification equipment and maintenance procedures at any time without notice Good Will Instrument Co Ltd No 7 1 J hongsing Rd Tucheng City Taipei County 236 Taiwan Declaration of Conformity We GOOD WILL INSTRUMENT CO LTD No 7 1 Jhongsing Rd Tucheng City Taipei County 236 Taiwan ii MULTI OUTPUT POWER SUPPLY USER MANUAL GOOD WILL INSTRUMENT SUZHOU CO LTD No 69 Lushan Road Suzhou New District Jiangsu China declares that the below mentioned products GPS 2303 3303 4303 4302 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 31 EEC 93 68 EEC and Low Voltage Equipment Directive 73 23 EEC For the evaluation regarding the Electromagnetic Compatibility and Low Voltage Eq
8. UTPUT POWER SUPPLY MULTI OUTPUT POWER SUPPLY USER MANUAL USER MANUAL D Set output on by adjusting VR702 so that the CH3 meter also reads rating amps invalid for GPS 3303 F Slowly adjust VR602 clockwise until the output voltage read from the E Connect a variable load load must be rated to handle a power of at least multimeter drops to 5nV 6mV start current limit point 30W across the output terminals and connect the multimeter to read the G Connect a variable load across the output terminals and connect the output current then adjust the load on the multimeter to show an output multimeter to read the output current then adjust the load on the current at 3 25A for GPS 33038 4302 1 20A for GPS 4303 and 2 75A multimeter to show an output current at 1 10A for GPS 4251 H Adjust VR602 until the 1 10A OVERLOAD indicator first lights F Slowly adjust VR402 clockwise until the output voltage read from the multimeter drops 5mV to 6mV start current limit point 6 4 Cleaning G Connect a variable load across the output terminals and connect the To clean the power supply use a soft cloth dampened in a solution of mild multimeter to read the output current then adjust the load on the detergent and water Do not spray cleaner directly onto the instrument since it multimeter to show an output current at 3 15A for GPS 3303 amp 4302 may leak into the cabinet and cause damage Do not use chemicals containing 1 10A for GPS 4303 and 2 65A for GPS 4251
9. ains constant as the load increases up until the point where the present current limit is reached At that point the output current becomes constant and the output voltage drops in proportion to further increases in load The 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 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 13 MULTI OUTPUT POWER SUPPLY MULTI OUTPUT POWER SUPPLY USER MANUAL USER MANUAL 5 4 Operation Mode 2 Series Tracking Operation 1 Independent Operation When the series tracking mode of operation is selected the position Red The CH1 and CH2 supplies each provide a 0 to rating volts output at up to rating amps This procedure covers the
10. arallel and both the maximum current and voltage are set using the CH1 controls The CH1 and CH2 output can be used as two individual but tracking power supplies or just the CH1 output can be used as a O to rating voltage supply with a O to double rating current capability 4 2 Real Panel 31 Fuse holder 32 Power socket 33 AC selects switch Selects to permit operation from 100 120 220 or 230VAC amp 34 HI LO switch 35 Cooling Fan 50 60Hz line voltage by using 34 HI LO switch HI position selects high voltage range 120 230V AC inputs LO position selects low voltage range 100 220V AC inputs Ventilates the hot air out to prevent output stage from thermo shock and improves the temperature coefficient 11 MULTI OUTPUT POWER SUPPLY USER MANUAL 5 OPERATION INSTRUCTION 5 1 Precaution 1 AC input AC input should be within the range of line voltage 10 230V 10 6 50 60Hz WARNING To avoid electrical shock the power cord protective grounding conductor must be connected to ground cordon secteur doit imp rativement tre reli la terre 2 Installation Avoid using the supply in a place where ambient temperature exceeds 40 C 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 40 C 3 Output voltage overshoot Voltag
11. ard to the user Be careful when connecting power supplies in series to achieve voltages higher than 60V DC total or 60V DC between any connection and earth ground Note Simultaneously metering of both current and voltage can be obtained in the mode of operation setting one of the displays for current metering and one for voltage metering In this case the output voltage across the two supplies is actually double the displayed value For example if the CH1 display is set for voltage metering and the CH2 display for current metering the output voltage across the CH1 positive red terminal and the CH2 negative black terminal would be double the reading on the CH1 LED Display since both supplies are putting out the same voltage The actual output current would be the value read from the CH2 LED Display since the two supplies are wired in series current flowing through each supply must be equal B Set the CH2 CURRENT control to the full clockwise position The maximum current is set by using the CHI CURREN control Follow the instructions for Setting current Limit select CH1 or CH2 supply independently by using the CH1 CURRENT control Note Because the supplies are being used in series either CURRENT control can be used to set maximum current If desired the CH1 CURRENT control can be rotated fully clockwise and the CH2 CURRENT control can be used to 15 MULTI OUTPUT POWER SUPPLY USER MANUAL adjust the max
12. arity output terminal for the CH1 supply Negative polarity output terminal for the CH1 supply Earth and chassis ground Positive polarity output terminal for the CH2 supply Negative polarity output terminal for the CH2 supply Positive polarity output terminal for the CH4 supply invalid for GPS 2303 amp 3303 Negative polarity output terminal for the CH4 supply invalid for GPS 2303 amp 3303 ON OFF the output 10 MULTI OUTPUT POWER SUPPLY 29 TRACKING amp Mode Switch 30 USER MANUAL Two push button switches that select Independent mode series tracking mode or parallel tracking mode as follows a When both switches are disengaged out the unit is in the Independent mode and the CH1 and CH2 power supplies are completely independent from each other When the left switch is engaged in and the right switch is disengaged out the unit is in the Tracking series mode maximum voltage of both supplies is set using the CHI VOLTAGE controls voltage at output terminals of the CH2 supply tracks the voltage at the output terminals of the CH1 SUPPLY Also in this mode of operation the positive terminal Red of the CH2 supply is connected to the negative terminal Black of the CH1 supply to allow the two supplies to be used as a 0 to double rating voltage supply When both switches are engaged in the unit is in the Tracking Parallel mode the CH1 and CH2 supplies are wired together in p
13. cococononcocncnnononoconoco 3 2 9 InsulatioN ooococococococononcnnccnnocococorocococococcncccononos 4 THEORY OF OPERATION occcoccccocococococoncncncononcnnonicnnans 4 PANEL CONTROLS AND INDICATORS 6 A 1 Front Panel ct sccctesescsacscaaecccecvacecedcovecsssecesacteadcetecses 8 4 2 Real Panelscicscsccscvsascccwssssevcesceecsaces casscssececsccuscseces sess 10 OPERATION INSTRUCTION csscecccsscssscececescsseseeees 11 E sc acess ves snes css casevie RI OTE 11 5 2 Setting Current Limit ooooooococononononcnncconocuncconacanonos 11 5 3 Constant Voltage Constant Current Characteristic 12 5 4 Operation Mod e cscscscccscccscccscscscsccscsescscsccsees 13 MAINTENANCE caninin in A E once nen ceras 19 6 1 Fuse Replacement ccccecsccccscsccscsccscescscsccscscees 19 6 2 Line Voltage Conversion scscccscscscscccscscececescees 19 AN AAA A 20 6 4 Cleaning ccceccceccccscccsccccccccceceseccscsesssceseseessens 24 V SAFETY TERMS AND SYMBOLS Please take a moment to review these safety terms and symbols which may appear in this manual or on Equipment to prevent damage to the Function Generators FO WARNING Warning statements identify condition or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property DANGER High V
14. d and Radiated Emissions EN 55011 1991 A1 1997 A2 1998 Electrostatic Discharge EN 61000 4 2 1995 Voltage Dips Interrupts EN 61000 4 11 1994 Safety Low Voltage Equipment Directive 73 23 EEC amp amended by 93 68 EEC Current Harmonic EN 61000 3 2 1995 A1 1998 A2 1998 A14 2000 Radiated Immunity EN 61000 4 3 1996 A 1 1998 Voltage Fluctuation EN 61000 3 3 1995 Electrical Fast Transients EN 61000 4 4 1995 EN 61010 1 2001 TEC 61010 1 2001 111 Surge Immunity EN 61000 4 5 1995 Conducted Susceptibility EN 61000 4 6 1996 O Safety Voltage Dips Interrupts EN 61000 4 11 1994 Low Voltage Equipment Directive 73 23 EEC amp amended by 93 68 EEC EN 61010 1 1993 A2 1995 TEC 1010 1 1990 A2 1995 SECTION PAGE 1 2 INTRODUCTION is cerernico macerar is 1 SPECIFICATIONG cscsccscsccccccscscecsccscscscssccessesssees 2 2 1 Gener all isis ver scevesegscn cece oad isu edite abri nn case cd sc bica id eee slides 2 2 2 Operation MOde cscscccccscccscccscscsceccscscssscseecees 2 2 3 Constant Voltage Operation scsccceecsceecscecceoees 2 2 4 Constant Current Operation c ccccccsceccececcscescsces 3 2 5 Tracking MoOde ooocococococononcncoconocononccnccccccccccoroconosos 3 2 60 RR OO T O 3 2 7 CH3 Output Specification oooooorocococoncocncncononoconono 3 2 8 CH4 Output Specification oooooo
15. e 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 VOLTAGE control away from zero sufficiently for the CC indicator to light 4 Set the meter selection switch to A position to select the current metering mode 5 Adjust the CURRENT control for the desired current limit Read the current value on the Ammeter 6 The current limit overload protection has now been preset Do not change the CURRENT control setting after this step 7 Remove the short between the and terminals and hook up for constant voltage operation MULTI OUTPUT POWER SUPPLY USER MANUAL 5 3 Constant Voltage Constant Current Characteristics The working characteristic of these series Power Supplies is called a constant voltage constant current automatic crossover type This permits continuous transition from constant current to constant voltage modes in response to the load change The intersection of constant voltage 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 rem
16. e for audio power Amplifier application Normal setting to OFF position MULTI OUTPUT POWER SUPPLY USER MANUAL 2 SPECIFICATIONS 2 1 General Main Supply switch selectable Operation Environment Storage Temperature amp Humidity 100V 120V 220V 10 230V 10 6 50 60Hz Indoor use Altitude up to 2000m Ambient temperature 0 C to 40 C Relative humidity 80 maximum Installation category II Pollution degree 2 10 C to 70 C 70 maximum Accessories Operation Manual X Table 2 1 REPLACED FUSE TYPE RATES INPUT TEST LEAD MODEL n Current 4AS Independent Series Para 100V 120V 220V 230V WATTS VA lt 3A Current lt 10A 0 30VX 60V 30V T6A GPS 2303 0 3AX 3A 6A 250V T3A 250V 350 450 0 2 0 30VX 60V 30V T6 3A GPS 3303 0 3A 3A I6A 250V T3 15A 250V 420 550 1 2 0 30VX 60V 30V T6 3A GPS 4303 0 3A50 3A I6A 250V T3 15A 250V 420 550 2 2 0 30V X2 60V 30V TSA GPS 4302 0 2450 2A lA 250V T3A 250V 320 420 2 2 0 25V4X2 50V 25V T2 5A GPS 4251 0 0 5A 105A 1A 250V T1 25A 250V 150 185 4 0 Dimensions 255 W x145 H gt 65 D m m Weight kg 7 0 kg 2 2 Operation Mode 1 Independent 2 Series 3 Parallel 2 3 Constant Voltage Operation 1 Output voltage range 2 Regulation Two independent outputs and CH3 2 2 5 2V output for GPS 4302 4303 3 6V output for GPS 4251 Fixed 5V for GPS 3303 CH4 8 15V output f
17. e master supply such as drift or ripple will cause an equal percentage change in the outputs of both the supplies Each power supply except CH3 for GPS 3303 and CH4 for GPS 4302 amp 4303 amp 4251 is a completely transistorized well regulated constant voltage constant current supply that will provide full rated output voltage at the maximum output current or can be continuously adjusted throughout the output range The front panel current controls can be used to establish the output current limit overload or short circuit when the supply is used as a constant voltage source independent or tracking modes and the voltage controls can be used to establish the voltage limit ceiling when the supply is used as a constant current source independent mode only The supply will automatically cross over from constant voltage to constant current operation current limited operation in the tracking mode Each power supply CH1 CH4 has its own front panel meter that can measure output voltage or current One power supply may be used as a CH1 supply controlling one CH2 supplies furnishing various voltage or current for a system When operate with the front panel mode switch in the tracking position the instrument is automatically internally connected in auto tracking configuration For audio production line the continuous or dynamic load can be internally selected When the connector J111 amp J309 is connected to ON position the unit is suitabl
18. es to the Tracking Parallel mode by engaging both Tracking switches B Output voltage will now be read from the CH1 VOLTAGE display Output current is exactly double the value read from the CHI CURRENT display because each supply is providing the same amount of current C Because both voltage and current of the CH2 supply track the CH1 supply the maximum current and voltage are set by using the CH1 controls Using the CH1 supply output jacks follow the instructions for Setting Current Limit 5 2 Section Remember that the actual current output at the CH1 supply output jack is double the reading on the CH2 indicator meter D Adjust the output voltage to the desired level by using the CH1 VOLTAGE controls E Turn off the power supply and the equipment to be powered during hook up F Connect the positive polarity of the device being powered to the red terminal of the CH1 power supply G Connect the negative polarity of the device being powered to the black terminal of the CH1 power supply The configuration is shown as Fig 5 5 Power Supply Fig 5 5 Parallel Tracking Operation 17 MULTI OUTPUT POWER SUPPLY USER MANUAL 4 CH3 Power Supply Operation The CH3 supply provides 2 2 5 2V GPS 4302 4303 and 3 6V GPS 4251 DC output with 3 amps GPS 33038 4302 1 amp GPS 4303 and 2 5 amp GPS 4251 current capacity The supply is ideal for us with TTL circuits GPS 3303 5V Fixed A Turn off the power supply a
19. imum current value Because current through the two supplies must be equal when they are being used in series the lowest CURRENT control setting will set the maximum output current C Adjust the output voltage to the desired level by using the CH1 VOLTAGE controls D Turn off the power supply and the equipment to be powered during hook up E If single supply operation is desired this allows the power supply to be used as twice the voltage and rating current simply by using the negative black terminal of the CH2 supply and the positive red terminal of the CH1 supply the configuration as shown in Fig 5 3 Power Supply Fig 5 3 Single Supply F If the chassis or common of the equipment being powered is separated from both the positive and negative polarity power inputs the output of the CH2 negative supply tracking the output of the CH1 positive supply the configuration as shown in Fig 5 4 Power Supply Fig 5 4 Positive and Negative Supply 16 MULTI OUTPUT POWER SUPPLY USER MANUAL 3 Parallel Tracking Operation In the parallel tracking mode of operation both supplies are strapped together in parallel This allows for a rating voltage supply with a double rating current capability Only the CH1 output terminals are used for parallel tracking operation In the parallel tracking mode the CH2 supply output voltage and current track the CH1 supply output voltage and current A Set the power suppli
20. justed 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 The recommended calibration device is a multimeter with an accuracy of 0 1 DCV or better GOOD WILL model GDM 8145 or equivalent If readjustment is required use the following procedure The location of the adjustments is shown in Fig 6 1 1 Independent Adjustment A Disengage both Tracking mode switches both switches out so that the power supply is in the independent operating mode B Connect a 4 1 2 digital multimeter with an accuracy of 0 1 DCV to measure the DC voltage at the output terminals of the CH1 CH2 supply C Set the CHI CH2 VOLTAGE control to maximum fully clockwise D Adjust trimmer potentiometer VR101 CH1 VR301 CH2 on the circuit board located on the right side of the supply for a reading as close to rating voltage 1 05 on the multimeter as possible E Set output on by adjusting the trimmer potentiometer VR801 CH2 VR201 CH1 from the CH1 CH2 voltage indicator circuit board located on the meter or A D converter board for a reading of rate voltage X1 05 on the CH1 CH2 F Set output off by adjusting trimmer potentiometer VR802 CH2 VR202 CH1 from the CH1 CH2 voltage indicator circuit board located on the meter or A D converter board for a reading of rate voltage on the CH1 CH2 invalid f
21. lacement must be destroyed by removal of any fuse amp fuse carrier and disposed of immediately as a plug with bared wires is hazardous if an engaged in live socket Any re wiring must be carried out in accordance with the information detailed on this label vii MULTI OUTPUT POWER SUPPLY USER MANUAL 1 INTRODUCTION The regulated DC power supply series is designed to be used in applications such as powering operational amplifier push pull stages logic circuit and definition systems where plus and minus voltages are required to track with an insignificant error To represent an operation convenience GPS 4302 GPS 4303 and GPS 4251 have four independent power supplies while GPS 2303 has two and GPS 3303 has three housed in a single package GPS 4302 GPS 4303 and GPS 4251 consist of four identical independent adjustable DC power supplies while two for GPS 2303 and three for GPS 3303 A front panel switch selects one of three operation modes of independent series and parallel In the independent mode the output voltage and current of each supply are controlled separately and each supply is isolated up to 300V from output to chassis or output to output In the tracking mode both outputs are automatically connected in series or parallel and the controls of the left supply adjust the magnitudes of both the positive and negative output voltages Because the outputs are connected in a tracking configuration any internal disturbance in th
22. nd the equipment to be powered during hook up B Connect the positive polarity of the device being powered to the red terminal of the CH3 supply C Connect the negative polarity of the device being powered to the black terminal of the CH3 supply D If the red OVERLOAD indicator lights means exceeding load has been placed on the supply it will cause voltage and current to drop and interfere the proper operation of the CH3 supply To correct this situation the load on the supply must be decreased so that no more than 3 amps GPS 3303 amp 4302 lamp GPS 4303 and 2 5 amps GPS 4251 of current are required 5 CH4 Power Supply Operation The CH4 supply provides an 8 15V GPS 4302 4303 4251 DC output with a 1 amps current capacity A Turn off the power supply and the equipment to be powered during hook up B Connect the positive polarity of the device being powered to the red terminal of the CH4 supply C Connect the negative polarity of the device being powered to the black terminal of the CH4 supply D If the red OVERLOAD indicator lights exceeding load has been placed on the supply it will cause voltage and current to drop and interfere proper operation of the CH4 supply Under this situation the load on the supply must be decreased so that no more than 1 amp of current is required 18 MULTI OUTPUT POWER SUPPLY USER MANUAL 6 Dynamic Load Operation amp Application A When select to dynamic load p
23. oltage ATTENTION refer to Manual Protective Conductor Terminal ground Earth Terminal Frame or Chassis Terminal vi FOR UNITED KINGDOM ONLY 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 amp Yellow must be connected to the Earth terminal marked with the letter E or by the earth symbol D or coloured Green or Green amp Yellow The wire which is coloured Blue must be connected to the terminal which is mark with the letter N or coloured Blue or Black The wire which is coloured Brown must be connected to the terminal mark 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 73mm2 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 rep
24. only To avoid electrical shock do no perform any servicing other than the operation instruction of the manual unless you are qualified to do so 6 1 Fuse Replacement 6 N 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 2 amp Table 2 1 WARNING For continued fire protection replace fuse only with 250V fuse of the specified type and rating and disconnect power cord before replacing fuse Line Voltage Conversion The primary winding of the power transformer is tapped to permit operation from 100 120 220 or 230VAC 50 60Hz line voltage Conversion from one line voltage to another is done by change AC selects switch as shown in Fig 4 2 The rear panel identifies the line voltage to which the unit was factory set 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 as listed on rear panel MULTI OUTPUT POWER SUPPLY USER MANUAL 6 3 Adjustments This unit was accurately ad
25. or GPS 2303 G Connect the external multimeter across the CH1 CH2 SUPPLY output terminals to read the output current so that the meter causes a short circuit across the terminals and adjust the CH1 CH2 CURRENT control so that rating amps is read on the multimeter H Set output on by adjusting the trimmer potentiometer VR901 CH2 VR701 CH1 so that the CH1 CH2 meter also reads rating amps I Rotate the CHI CH2 current control fully clockwise maximum J Adjust VR103 on the CH1 VR303 CH2 supply circuit board located on the right side of the supply to obtain an output current of rating amps X1 05 read on the meter or LED display 21 MULTI OUTPUT POWER SUPPLY USER MANUAL K Set output off by adjusting the trimmer potentiometer VR903 CH2 VR703 CH1 so that the CHI CH2 meter also reads rating amps invalid for GPS 2303 2 Series Tracking Adjustment A Set the supply to Tracking series mode by engaging the left Tracking switch and releasing the right tracking switch B Set the CH2 CURRENT control to midrange and set the CH1 supply voltage controls to minimum fully counterclockwise C Connect the multimeter to the CHI SUPPLY outputs and measure the voltage D Disconnect the multimeter from the CH1 supply outputs and connect it across the CH2 supply outputs E Adjust trimmer potentiometer VR306 on the circuit board located on the right side of the supply to obtain the exact same reading for the CH2 supply out
26. or GPS 4302 4303 4251 Output from 0 to rating volts and O to rating amperes Output from 0 to rating volts at rating amperes each Output from O to double rating volts at rating amperes Output from O to double rating amperes at rating volts 0 to rating voltage continuously adjustable Line regulations 0 01 3mV Load regulation 0 01 3mV rating currentS 3A Load regulation 0 02 5mV rating current gt 3A MULTI OUTPUT POWER SUPPLY USER MANUAL 3 Recovery time 4 Ripple amp Noise 5 Temperature coefficient 2 4 Constant Current Operation 1 Output current range 2 Regulation 3 Ripple current 2 5 Tracing Operation 1 Parallel Operation Regulation 2 Series Operation Regulation S 1004 s 50 load change minimum load 0 54 S ImVrms 5Hz 1MHz 300ppm C Oto rating current continuously adjustable Line regulation lt 0 2 3mA Load regulations 0 2 3mA S 3mArms Line regulations 0 01 3mV Load regulation 0 01 3mV rating currentS 3A lt 0 02 5mV rating current gt 3A Line regulations 0 01 5mV Load regulation lt 300mV A Positive and Negative supply Fig 5 4 CH2 tracking error 0 5 10mV of the CH1 No load with load add load regulation lt 300mV B Single supply Fig 5 3 2 6 Meter A Display A Display V B Accuracy C Voltmeter D Ammeter 2 7 CH3 Output Specifications 1 Regulation 2 Ripple amp Noise 3
27. osition the max peak current is at 1 7 times rating current The features are only applied for audio circuit of amplifier and audio production lines Change the position of wafer J111 of CH1 and J309 of CH2 from OFF to ON Please refer to Fig 6 1 Adjustment Location B For other application and testing Safety or CE etc must set the wafer at OFF position 7 Output ON OFF Action The output ON OFF action is controlled with a single control the output switch is pushed on a high single output is on and output LED is on while the output switch is pushed off or tracking switch is pressed output will disable CAUTION The output terminals are for use only with the equipment which has no accessible live parts The output terminals should not be connected to any hazardous live parts 8 Fan Control 1 The fan of the power supply will not work upon power on until the temperature of the heat sink rises up to 32 C45 C after adding load to output terminal The more the temperature of the heat sink rises the more the rolling speed of the fan gets fast The fastest rolling speed is when the temperature reaches to 70 C 2 To avoid damaging the power supply if the fan fails to work when the temperature reached to the appropriate value turn off the instrument and check the cause 19 MULTI OUTPUT POWER SUPPLY USER MANUAL 6 MAINTENANCE WARNING The following instructions are for use by qualified personnel
28. put as was preset at the CH1 supply output e g if the minimum CH1 supply output voltage is 10 00mV adjust VR306 to obtain an output voltage as close to 10 00mV at the CH2 supply as possible F Set the CH2 CURRENT control to midrange and set the CH1 supply voltage controls to maximum fully clockwise G Connect the multimeter to the CH1 supply outputs and measure the voltage H Disconnect the multimeter from the CH1 supply outputs and connect it across the CH2 supply outputs Set output on by adjusting VR501 located at the left of the lower front panel circuit board VOLTAGE CURRENT CONTROL potentiometer board until the voltage read from the multimeter is the same as it was across the CH1 output terminals Return the multimeter to the CH1 output terminals and verify that the output voltage is identical If not repeat this step Set output off by adjusting VR804 located at the left of the lower front panel circuit board VOLTAGE CURRENT CONTROL potentiometer board until the voltage read from the multimeter is the same as it was 22 MULTI OUTPUT POWER SUPPLY USER MANUAL across the CH1 output terminals Return the multimeter to the CH1 output terminals and verify that the output voltage is identical If not repeat this step invalid for GPS 2303 3 Parallel Tracking Adjustment A Disengage both Tracking mode switches both switches out so that the power supply is in the independent operating mode
29. uipment Directive the following standards were applied EMC EN 61326 1 Electrical equipment for measurement control and laboratory use _ EMC requirements 1997 A1 1998 Conducted and Radiated Emissions Electrostatic Discharge EN 55011 1998 EN 61000 4 2 1995 A1 1998 Current Harmonic EN 61000 3 2 1995 A1 1998 A2 1998 A14 2000 Radiated Immunity EN 61000 4 3 1996 A1 1998 Electrical Fast Transients EN 61000 4 4 1995 Voltage Fluctuation EN 61000 3 3 1995 Surge Immunity EN 61000 4 5 1995 MULTI OUTPUT POWER SUPPLY USER MANUAL Declaration of Conformity We GOOD WILL INSTRUMENT CO LTD No 7 1 Jhongsing Rd Tucheng City Taipei County 236 Taiwan GOOD WILL INSTRUMENT SUZHOU CO LTD No 69 Lushan Road Suzhou New District Jiangsu China declares that the below mentioned products GPS 4251 GPQ 2505D 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 31 EEC 93 68 EEC and Low Voltage Equipment Directive 73 23 EEC For the evaluation regarding the Electromagnetic Compatibility and Low Voltage Equipment Directive the following standards were applied EMC EN 61326 1 Electrical equipment for measurement control and laboratory use _ EMC requirements 1997 A1 1998 Conducted Susceptibility EN 61000 4 6 1996 Conducte
30. uit The circuit element consists of integrated circuit U101 U102 U103 U104 U105 U108 The circuit arrangement is shown as block diagram in Fig 3 1 The circuitry is discussed with reference to the block diagram function description Single phase input power is applied to transformer through the input circuit Auxiliary rectifier D1021 1024 provides a bias voltage filtered by capacitor C103 C104 for the preregulator U101 U108 that provides a regulator voltage for elements of action The main rectifier a full wave bridge rectifier provides the power which is filtered by capacitor C1021 and then regulated via a series regulator and delivers to the output U105 acts as a current limiter When current is over predetermined rating it is activated and decreases the current U102 provides a reference voltage for U103 U105 U103 is an inverter amplifier U104 is a comparator amplifier which compares reference voltage and feedback voltage and then delivers to Q103 Q104 which then calibrates the output voltage Q113 is activated when the unit is overload It controls Q103 current magnitude which limits the output current The relay control circuit provides limited power dissipation in series regulator MULTI OUTPUT POWER SUPPLY MULTI OUTPUT POWER SUPPLY USER MANUAL USER MANUAL 4 PANEL CONTROLS AND INDICATORS EN jm la a a Es me NES AREI LTA a a RA al e 4 prono e
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