DC POWER SUPPLY GPS-S SERIES (ANALOG / DIGITAL TYPE) SAFETY TERMS AND SYMBOLS These terms may appear in this manual or on the product: WARNING. Warning statements identify conditions 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. The following symbols may appear in this manual or on the product: A A A @Yg DANGER DANGER ATTENTION Protective Equipotentiality High Voltage Hot Surface refer to Manual Conductor erminal 82PS-30300MMEC Declaration of Conformity We GOOD WILL INSTRUMENT CO.,LTD. No.7-1, Jnongsing 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 GPS-1830, GPS-1830D, GPS-1850, GPS-1850D, GPS-3030, GPS-3030D, GPS-6010 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). 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 Radiated Immunity TEC 1000-4-3 (1995) Current Harmonics EN 61000-3-2 (1995) Electrical Fast Transients | IEC 1000-4-4 (1995) Voltage Fluctuations EN 61000-3-3 (1995) Surge Immunity IEC 1000-4-5 (1995) Conducted Susceptibility | TEC 61000-4-6 (1996) Power Frequency EN 61000-4-8 (1993) Magnetic field - Voltage Dip/Interruption EN 61000-4-11 (1994) Low Voltage Equipment Directive 73/23/EEC Low Voltage Directive LIEC/EN 61010-1: 2001CONTENTS SECTION PAGE 1. INTRODUCTION..........cccscssscenscsscesssessssaeesenessceaeseeeeeneneeeeseesseeeneassenanceseesenaseeseaesenseaessaereoneeeeanensonenes 1 2. SPECIFICATIONS. .........c0ccccccsesscesseccsecaacaneceseeeseesecceusceseseeeenenereneneeseeeeeeneesaeneatacencanesnsoaneooeresaanens 2-1 GEM ral ooocccccec ce ee nee nee een en eee EEE See PEE EEE BOR EEE EEE EEA SOAS OUEST EEE AEE EEE EEO SEES IEEE EEE EE EDEN CHEESE ESOS 2 2-2 Constant Voltage Operation 3 2-3 Constant Current Operation 3 2-4 Indicator Meter 20000... cccc cece eee eee nee ee ener een een eee eee eRe OOU EO a EGA OEE EEE ESE EEE EEE EEE EEE EEE EEE EEE EE EOE EERIE SEES EEE E 3 7a Fa 10 | (C0) 0 ESET ESSE OOESOSEOSCOSESIOD 4 3. THEORY OF OPERATION .........:.:cceseesccsesecceseenenscerenavcesensesees peuseeeesseecseccoeccanecaeceeeeuerseesuenecsenenseees 4 4, PANEL CONTROLS AND INDICATORS. ..........c:cccceeccescnsecescencoevenessuecsanscusecsecaenesseeasegseneneaesseseaesaoees 6 4-1 Front Panel 6 4-2 Rear Panel 6 5 OPERATION INSTRUCTIONG. ...........2ccccceressscscssecesenseceesesousccessanssuuscesseesseaseneseaseeeeenerseseuseseucossees 10 K-17 PRECAUTION. eee cece cece cece eee eee eee nee rte EERE EEO EE DEER A TERA EEE DEED EEE OEE EEE DEE EEE OOH EEE EES EEE E REED IEEE EEO E EOD 10 5-2 Setting Current Limit .....0... 0. creer renee rte eee nner caret e 10 5-3 Constant Voltage/Constant Current Characteristic 10 5-4 Operation Mode............ 0.0... cece e cece eee ete tte eee eee eee ve 12 GB _ MAINTANCE ................cccccscsccerecscececeerscccecscnsscenanecceeseseeecesneeseeseneeeasseneneasseaeneaneneneesecesnanensansnenees 18 6-1 Fuse Replacement ............ccccccceccceec cece eee neste eee e ee eee nee cn eee DEH EEE EE EE RESO EEE CEE EGG CGO PEO EEC Fee cnr Erb GL EEEE HOES 18 6-2 Line Voltage CONMVersion ........... cece ccc c cece ec eeesn cee cee eee aaa eee eeeeee eee ne ene eee eee eeeeneeeeseetea see eneeeeceeena ees 18 See BAO} {UTD (00 <b SEES SESS OOOOSOSCOSOSOOOOOOCOOOOSEOOOOSIOOSSOOSS 18 So a @1( 7-111 (0 EO EESESTESOSSOOEOSOSOOOOSOOOOOSIOOOOECOOOOOO 19 Nn nN Neen eee ene eee en eee eee eee ee eee ee eee ee ee eee eee ee eee 1. 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 0 to rating voltage in one range by means of a coarse and fine potentiometer , the load current may have any value from 0 rating current and adjusted by means of a coarse and fine potentiometer. Both output can accurately read-on voltmeter and ammeter. Both stability and ripple are extremely 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 Instruction section. For applications when outputgreater than V or A is need, the unit can be connected up in series or parallel. For applicaticn 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 MODEL Max. Rating Input Rating FUSE Type and Rating Weight Volts (V) | Amps (A)| Watts VA 100V/120V 220V/240V Kg GPS-1830 18 3 120 150 T 2A 250V; T 1A 250V| 4.0 GPS-1830D 18 3 120 150 T 2A 250V/} T 1A 250V; 4.0 GPS-1850 18 5 190 230 T 2.5A 250V | 7T1.25A 250V) 5.5 GPS-1850D 18 190 230 T 2.5A 250V| T1.25A 250V| 5.5 GPS-3030 30 3 160 200 T 2.5A 250V; T1.25A 250V| 5.0 GPS-3030D 30 3 160 200 T-25A 250V | 71.25A 250V; 5.0 GPS-6010 60 1 120 150 T 2A 250V|T iA 250V| 4.0 Dimensions : 128 (W) X 145 (H) X 285 (D) mm WARNING. Voltages more than 60V DC are a lethal shock hazard 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. Operation mode Single or Tracking (Series or Parallel) operation (two units). Operation Environment : Indoor use Altitude up to 2000 m Installation Category II Pollution degree 2Operation Temperature & 0C to 40C, <80% Humidity Storage Temperature & 10C to 70C, <70% Humidity Accessories Test Lead (CUrrent < 4A) ........ eee eeccssscscessesenesersneeneeseeseeseesceeseensensseananenensenseeesesensee (4A < current < 10A) Operation Manual .......... ccc ccccccsesseessscescsesevereneesseneeesescnseesssnsccsscessesuscessanesessnneeees 2-2 Constant Voltage Operation (1) Output voltage ranges 0 to rating voltage continuously adjustable. (2) Voltage regulation line regulation<0.01%+3mvV. load regulation<0.01%+3mvV (rating current<3A). load regulation<0.01%+5mvV (rating current>3A). (3) Recovery time<100us (50% Load change, minimum load 0.5A) (4) Ripple & Noise <0.5mVrms (5Hz~1MHz) (rating current<3A). Ripple & Noise <1.0mVrms (5Hz~1MHz) (rating current>3A). (5) Temperature coefficient<300PPM/C. 2-3 Constant Current Operation (1) Output current range 0 to rating current continuously adjustable. (2) Current regulation line regulation<0.2%+3mA. load regulation<0.2%+3mA. (3) Ripple & Noise<3mArms. 2-4 Indicator Meter (1) Digital Type Display: 3 1/2 Digits 0.5 Red LED DISPLAY (Voltage and current switchable). Accuracy: +(0.5% of rdg + 2 digits). -3-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). (2) Analog Type Meter: Voltmeter and Ammeter each one. Class: 2.5 Dimensions: 50x50 m/m. 2-5 Insulation Between chassis and output terminal. 20M0Q or above (DC500V). Between chassis and AC cord. 30MO or above (DC500V). 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 rectifier and filter, a series regulator, a current comparator, a voltage comparator, a reference voltage amplifier, a remote control and a relay control circuit. The circuit element are several of integrated circuit (U101, U102, U103, U104, U105, U106). 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 D1021-D1024 provides a bias voltage filtered by capacitor C103, C104 for the preregulator U101, Q105, Q106, that provides a regulator voltage for element of action. The main rectifier, a full wave bridge rectifier, provides the power which is filtered by capacitor C101 and then regulated via a series regulator and deliver to the output. U105 acted as a current limiter. When current is over predominante rating, it acted and decreased the current U102 provides a reference voltage for U103A, U103B, U103 is a invertor amplifier, U105 is a current comparator. Both via OR gate and driver amplifier to series control 0101, 0102. The relay control circuit provides limited power dissipation is series regulator. -4-AC INPUT AUXILIARY REFERENCE RECTIFIER AND VOLTAGE Lg frre D102 Ka] TRANSFORMER | U102 D1024 ,U101 TS101 Q105,0106 REMOTE CONTROL . MAIN RELAY T101,S105 REFERENCE OR'GATE & RECTIFIER CONTROL , CURRENT DRIVER AMP #& FILTER D101 K-19109,Q110,Q111 COMPARATOR D108,0109 -D1014,C101 12,011 ser; OH ON Q103,0104 Q112,Q115 U103B ; RIO! RL101,RL102 MASTER! 0/P 7 PAR| v a || SER | SER! Onli) GO CURRENT SERIES o/P SLAVE| 1/P A COMPARATOR REGULATOR > Par} () cs vies Q101,0102 REFERENCE VOLTAGE || Re L____m_ AMPLIFIER | > COMPARATOR AMPLIFIER U103A U104 Nerds Fig. 1 Block Diagram -5-4. PANEL CONTROLS AND INDICATORS 4-1 Front panel 2OEO SOEQQEOSEGOO CV indicator CC indicator Voltage coarse Voltage fine Current coarse Current fine "+" output terminal GND terminal " output terminal meter meter AWN selects switch Power control Current HI/LO control 4-2 Rear panel Gee 86 @ Fuse holder Power cord AC selects switch AC selects switch Master-Slave Switch Input-Output connector 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 (Analog type). indicates the output voltage or current (Digital type). indicates the output current (Analog type). selects the meter indicates of the output voltage or current (Digital type). on/off switch. current indicates HI/LO range SELECTS. With (8) switch selects the line voltage at the high end (Right position) of the range 120V or 240V and at the low end (left position) of the range 100V or 220V. Selects the line Voltage is in the 100V-120V range (left position) or is in the 220V-240V range (Right position). Selects for Master (internal control) or Slave (external remote control) tracking operation. With Master-Slave switch selects, permit from the Master unit (SER. or PAR.) output connected to Slave unit (SER. or PAR.) inputs.() (2) (ML Laboratory HW DC Power Supply naee ol; @! CURRENT 5 ele COARSE Ox Os AMPS] _ FINE rp vo TAG E @ couse mON OFF 7 = GND (em! {gO} (nav owsa O~5A 4|| || fe ee ot Fig. 4-1 Front Panel (Digital Type) -7- y O errinthg ar ccoansemn I \| __ I 40 20 40 20 | yogi tins %b littl, 4 z Le a & ne v ule |" o eo. Ie (1) CURRENT VOLTAGE Hf 1 py SL a @.0 Cl 6!) rarer a LP COARSE |AMPS] FINE COARSE mON MOFF f =- GND + O9O \ {= | 0) [0~3044 O~3A v } ) 0 6 Fig. 4-2 Front Panel (Analog Type) -8-DEPRESS TAB TO INSERT ON QM PROGRAMMING ED) OR REMOVE WIRE & Goat ou = 0-10V SER PaR SERIIPAR) 0% SER Pan (SERITPAR MASTER SLAVE FULL RANGE MASTER FOR SETUP PROGRAMS TPUT = INPUT REFER TO MARUAT SLAVE gm ac oO LINE SELECT Miiy 9 J &) 2 100v/ 2~ 220v = 120V| 2 240V 1 LINE | FUSE | FREQ ] POWER TOO | 12.5A 120v | 2s0v | sonz | SOW 200VA : 220v |T1.25a| S0Hz | ay 4 240v | 250v \) ( AC OS co oo FIG. 4-3 REAR PANEL -9- tt i i) @ @) on5. OPERATION INSTRUCTIONS 5-1 Precaution (1) AC input AC input should be within the range of line voltage +10% 50/60Hz Z)\ warnine. To avoid electrical shock, the power cord protective grounding conductor must be connected to ground. (2) Installation Avoid using the supply in a place where 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, dont use it in a place where ambient temperature exceeds 40C. (3) Output voltage overshoot Voltage between output terminals never exceeds the present 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 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 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 is proportion to further increases in load. The crossover point is indicated by the front panel LED indicators. The cross- over point is reached when the CV indicator goes off and the CC indicator comes on. -10-Vo Max Constant Current lo Max Range -Crossover Point Constant oltage Output ange Voltage Output Current Fig. 5-1 Constant Volitege/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. -ll-5-4 Operation Mode Single Operation Use the supply as it is for single operation. (1) (2) mmOO > Set Power switch to OFF position. Make sure that line voltage is correct for the input power voltage. Plug power cord into the power outlet. Set Power switch to ON position. Adjust Voltage and Current control to the desired output voltage and current. Connect the external load to the output binding posts. Make sure both + and - terminals are connect correctly. Series Operation ( only applied to the same models } Two power supplies can be connected in series to provide higher voltage and rating current output. See Fig. 5-2 for the connection scheme. A. B. C. Set power switch to OFF position. Set the MASTER power supply INT-SLAVE switch to INT position and set the SLAVE power supply INT-SLAVE switch to SER-SLAVE position. From the "MASTER" power supply SER output terminal to SLAVE power supply SER input. Set power switch to ON position. WARNING. Voltage more than 60V DC are a lethal shock hazard to the user. Be careful when connecting /\ power supplies in series to achieve voltage higher than 60V DC total or 60V DC between any connection and earth ground. -12-we we eee ee eww we eH we ee ee ewe a ww He tee ewe meee en REAR PANEL SER. I/P ! ' OOOO POWER : + 6) jp SUPPLY ' - ! i " i: i | (MASTER)! LINT_ 7 SLAVE ___o LOAD CONNECTED ! 1/P ; [OO POWER 6) R. SUPPLY . ! ~ i | INT SLAVE (SLAVE) ! Fig. 5-2 Connecting Two Power Supplies in Series -13-E. F. G. Set the SLAVE VOLTAGE and CURRENT control to maximum output. When connected in series, from the master VOLTAGE controls of each power supply exercise control over 0 to rating range. Add the two voltmeter readings together to determine the total output voltage, or an external voltmeter may be connect across the load. Load current may be monitored from either supply; the reading 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 of the master power supply; the slave would set for maximum. (3) Parallel Operation Two power supplies may be connected in parallel to provide rating voltage and higher current output. See Fig. 5-3 for the connection scheme. A. B. c. D. When connected in parallel the VOLTAGE controls of each power supply exercise control over a 0 to rating range. Add Set power switch to OFF position. Set the Master power supply INT-SLAVE switch to INT position and set the SLAVE power supply INT-SLAVE switch to "PAR-SLAVE position. From the MASTER power supply "PAR" output terminal connected to "SLAVE" power supply PAR input. the two ammeter readings together to determine the total output current or an external ammeter may be connected series the load. The output voltage may be monitored from either supply; the readings will be identical since they are connected in parallel. Also, since the supplies are connected in parallel, it is only necessary to set the current limit of the master power supply; the slave would set for maximum. Set power switch to ON position. Set the SLAVE VOLTAGE and CURRENT control to maximum output. Set the MASTER output voltage iower than 0.2-0.5V of SLAVE output voltage, this point is very important. -14-REAR PANEL an eae. \/P OOOO To POWER S \o/p/ SUPPLY | | [o i. oN (MASTER) INT! SLAVE | CONNECTED [" 1/P | 1 ||} 000 power KH | Ir SUPPLY |_| , | : (SLAVE) | [INT] SLAVE | Fig. 5-3 Connecting Two Power Supplies in Parailel. -15- LOAD(4) Remote control of output voltage The output voltage of the power supply can be remote-controlled with an external voltage, the connection scheme as follow, See Fig. 5-4. Fig. 8-4 REAR PANEL + REMOTE CONTROL VOLTAGE SOURCE 1/P | O000 POWER | /PSeR. SUPPLY lint] stave | A. Set the power supply INT-SLAVE switch to "SER-SLAVE position. B. The"+" line of control voltage source is connected to the "SER input terminal and the "" line of control voltage source is connected to the power supply output + terminal. C. The output voltage Eo calculate as follows formula: Eo = -ErxEc 10 Eo: Output voltage of the power supply. Er: Rated voltage of the power supply. Ec: Remote control voltage. 0<Ec<approx. 10V D. For the remote voltage source Ec, use a divice which provides a stable, low noise voltage source (a GOOD WILL GPR, GPC series power supply or an equivalent device). -16-(5) Remote control of output current The output current of the power supply can be remote-controlled with an external voltage, the connection scheme as follow, See Fig.5-5. Fig. 5-5 REAR PANEL REMOTE CONTROL VOLTAGE SOURCE /P + | OO000 POWER | /P! PAR. SUPPLY | =o< lint] SLAVE | A. Set the power supply INT-SLAVE switch to "PAR-SLAVE position. R_ The" line of control voltage source is connected to the PAR input terminal and the "+" line of control voltage source is connected to the power supply output + terminal. C. The output current lo calculate as follows formula: lo = ttxEc 10 lo: Output current of the power supply. Ir: Rated current of the power supply. ~ Ec: Remote contro! voltage. 0<Ec<approx. 10V D. For the remote control voltage source Ec, use a device which provides a stable, low noise voltage source (a GOOD WILL GPR, GPC series power supply or an equivalent device). -17-6. 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). 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 line 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 as 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. However, adjustments should be attempted only if a multimeter with an accuracy of +0.1% dcv or better is available (GOOD WILL Model GDM-8035G or equivalent). -18-(1) (2) 6-4 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 MOODD Connect an accurate (+0.1%) external multimeter to measure the dc voltage at output terminals of the power supply. Set the COARSE and FINE VOLTAGE controls to minimum (fully counterclockwise). Turn the COARSE and FINE VOLTAGE controls to maximum (fully clockwise). Adjust trimmer pot VR105 for a reading of rate voltsx1.05 on the mulitimeter. Set the COARSE and FINE VOLTAGE controls for a reading of rate volts on the multimeter. Adjust trimmer pot VR301 (VR201 digital type) for a reading of rate volts on the voltmeter (Digital Panel meter, digital type) of the power supply. Adjustment of the Rating Current A. Set the CURRENT control to minimum (fully counterclockwise). B. Connect the external multimeter to measure dc current at the output terminals of the power supply. C. Set the COARSE and FINE CURRENT controls to minimum (fully counterclockwise). D. Adjust trimmer pot VR107 for reading of 0 amps on the multimeter. E. Set the COARSE and FINE VOLTAGE controls to a centered position. F. Setting and turn the COARSE and FINE CURRENT controls to maximum (fully clockwise). G. Adjust trimmer pot VR108 for a reading of 1/2rate ampsx1.05 on the multimeter. (LO current) H. Adjust trimmer pot VR109 for a reading of rate ampsx1.05 on the multimeter. (HI current) |. Readjust the CURRENT control for a reading of rate amps on the multimeter. J. Adjust trimmer pot VR111(HI),VR110(LO) to calibrate the Ammeter or Digital panel meter of the power supply for the same reading as the multimeter. 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 power supply. -1]9-() VR301 GPS-846 -7 GPS-846.-6 VR112 MIN. MAX. GPS-846 -1 Ce) AMPS () Lo VR107_~- VR108 @" VR109 VR105 MAX VOLTS. GPS-846 -2 LO VRI10 VRII1 @) HI Fig. 6-1 Adjustment Location -20- GPS-688 -1 VR201 Fig. 6-2 Adjustment LocationNOTE 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) FOR UNITED KINGDOM ONLY As the colours of the wires in mains leads may not correspond with the colours markings 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 N or coloured Blue or Black. The wire which is coloured 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?, 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 label. -21-