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Agilent E361xA 60W BENCH SERIES DC POWER SUPPLIES

1. MS1 MS2 CC SENSE L SLAVE JL REMOTE I 8 E CC VREFAI 2 A4 AS m SLAVE POWER SUPPLY T MASTER r LOCAL PR 7 2 MS1 MS2 CV SENSE ce SLAVE L _ REMOTE CV VREFAI A2 A4 A5 MASTER POWER SUPPLY MASTER LOCAL 0 01010 51 MS2 CV CC SENSE L SLAVE L 2 A4 LOAD SLAVE POWER SUPPLY S1 MASTER Q LOCAL 3 Z 22 2 MS1 MS2 CV SENSE L SLAVE LLL REMOTE S CV VREFAi 2 4 A5 minm pices Prim S OUT S CV VREFAi A2 A4 A5 SLAVE POWER SUPPLY S2 MASTER LOCAL 2 A Z
2. MS2 CV CC SENSE L SLAVE LL REMOTE Vo Vm 1 P2 R2R4 Where Vo Auto Series voltage Vm Vs1 Vs2 R1 R1 E Vm master unit s output voltage Vs1 slave S1 unit s output voltage Vs2 slave S2 unit s output voltage Figure 13 Auto Series Operation of Three Supplies Remote Sensing To remote sense with auto series operation set SENSE switch of the master unit and set SENSE switch of the slave unit to remote Remote Analog Voltage Programming To remote analog pro gram with auto series operation connect program external volt ages to the CV or CC terminal of the master unit and set CV or CC switch of the master unit to remote AUTO TRACKING OPERATON Auto tracking operation of power supplies is similar to auto series operation except that the master and slave supplies have the same output polarity with respect to a common bus or ground This operation is useful where simultaneous turn up turn down or proportional control of all power supplies is required Figure 14 and Figure 15 show two and three supplies connected in auto tracking with their negative output terminals connected together as a common or ground point For two units in auto tracking a fraction R2 R1 R2 of the output of the master supply is provided as one of the inputs to the comparison amplifier of the slave supply t
3. MS1 MS2 CV CC SENSE SLAVE LL REMOTE SLAVE POWER SUPPLY AG MS1 MS2 CV CC SENSE SLAVE LL REMOTE 2 2 SLAVE POWER SUPPLY MASTER Loca MS1 MS2 CV SENSE L SLAVE L REMOTE 2 Z Figure 10 Auto Parallel Operation of Three Supplies NORMAL SERIES OPERATION Series operation of two or more power supplies can be accom plished up to the output isolation rating of any one supply to obtain a higher voltage than that available from a single supply Series connected supplies can be operated with one load across both supplies or with a separate load for each supply These power supplies have a reverse polarity diode connected across the output terminals so that if operated in series with other sup plies damage will not occur if the load is short circuited or if one supply is turned on separately from its series partners When this connection is used the output voltage is the sum of the voltages of the individu
4. Figure 4 Switch Settings of Rear Panel Control for Turn On Checkout a Disconnect power cord b Check that the rear panel switch settings are as shown in Fig ure 4 Checkthat the rear panel label indicates that the supply is set to match your input line voltage If not refer to Line Voltage Option Conversion d Check that the fuse on the rear panel is correct for your line voltage e Connect the power cord and push the LINE switch to ON f While pressing OVP CC SET switch verify that the OVP shutdown is set above 8 0 20 0 35 0 or 60 0 Vdc for E3614A E3615A E3616A or E3617A respectively If not turn up OVP Adjust with a small flat blade screwdriver 9 Turn VOLTAGE control fully counter clockwise to ensure that the output of VOLTS display decreases to 0 Vdc then fully clockwise to ensure that output voltage increases to the maxi mum output voltage h While pressing OVP CC SET switch turn the CURRENT con trol fully counter clockwise and then fully clockwise to ensure that the current limit value can be set from zero to maximum rated value OPERATING MODES The setting of the rear panel switch determines the operating modes of the power supply The local operating mode is set so the power supply senses the output voltage directly at the output terminals local sensing for operation using the front panel con trols local programming Other oper
5. STEP ACTION RESPONSE PROBABLE CAUSE 4 Check voltage from pin 13 to a Measured voltage is positive Check U9A is defective pin 12 of U9 b Measured voltage is negative Check U10 and is defective Check R85 is open 5 Check voltage from pin 6 a Measured voltage is positive U9B is defective to pin 5 of U9 b Measured voltage is negative Check U9C is defective Table A 6 Preregulator Control Circuit Troubleshooting STEP MEASURE RESPONSE PROBABLE CAUSE 1 Set output voltage to 4 5 V 0 5 V for E3614A Set output voltage to 10 V 1 V for E3615A Set output voltage to 15 V 1 V for E3616A Set output voltage to 26 V 5 V for E3617A 2 E3614A Waveform form from a Normal firing pulse Check CR18 CR15 Q7 Q8 E3615A TP6 common to point 6 for defective b No firing pulse Proceed to step 3 E3616A Voltage from TP6 a High voltage 40 7 V CR15 CR18 U2 U21 common to point 6 defective b Low voltage 0 V Proceed to step 3 3 Voltage from TP6 common to a Low voltage 12 V 03 defective U4 pin 1 b High voltage 45 V Proceed to step 4 4 Voltage from TP6 common to a High voltage 415 V U4 defective U5 pin 1 b Low voltage 12 V Proceed to step 5 5 Voltage from pin 6 to a Measured voltage is positive 05 defective pin 7 of U5 b Measured voltage is negative U6 defective 6 Set output voltage to 7 V 1 V for E3614A Set output voltage to 16 V 2 V for E3615A Set
6. 614 1000UF 25V 20 AL ELECTLT UF 25V 20 AL ELECTLT Table A 11 Component Value Model E3615A F 50V 20 A 12000UF 63V 20 A ELECTLT L ELECTLT E3616A 5600UF 100V 20 AL ELECTLT E3617A 330UF 50V 20 AL ELECTLT 220UF 100V 20 AL ELECTLT 2700UF 160V 20 AL ELECTLT C11 16 17 25 26 0 01UF 100V 10 CER X7R 0 01UF 100V 10 CER X7R C12 0 1UF 50V 10 CER X7R 0 1UF 50V 10 CER X7R PF 100V 5 COG PF 100V 5 COG OV 20 AL ELECTLT 1UF 50V 20 AL ELECTLT ww C29 0 01UF 100V 10 CER X7R 0 01UF 100V 10 CER X7R 470PF 5 100V CER COG 470PF 5 100V CER COG pem LLL TO S 8 1 125W 1K 1 125W 1K 5 1W R11 2K 5 5K 5 27k 5 2W 45K 5 2W 2 emm T 2 eaeemoum 00 qpeeem mc rsj LL ET s i 125W 125W 125W 19 6 125W 10K 1 125W 100K 1 125W 6 81K 25W 8 25K 1 125W 9 53K 1 125W 125W 2 R40 2 43K 1 125W 3 09K 1 125W 5 23K 1 125W 6 81K 1 125W 100 1 125W 00 1 125W 1K 1 125W 100 1 125W 00 1 125W 0 a R58 0 2 1 10W 0 2 1 10W 0 6 1 10W m R62 142 2 4 1 125M 105K 1 125W 475K 0 15 125W R70 178K 1 125W 383K 1 125W 23 7K 1 125W 147K 1 125W P 681K 1 125W R116 28K 1 125W 38 3K 1 125W 38 3K 1 125W 35 7K 1 125W 2 C
7. MS1 Ms2 CV SENSE L SLAVE JL REMOTE S CV VREFAI A2 M AS MASTER POWER SUPPLY MASTER LOCAL 3 81 MS2 CV cc SENSE i SLAVE LL REMOTE EI CV VREFAI 2 A4 A5 SLAVE POWER SUPPLY S1 MASTER LOCAL wc All Iu Z 2 MS1 52 CV SENSE i SLAVE LL REMOTE 5 CV VREFAI 2 A4 A5 SLAVE POWER SUPPLY S2 mi R4 MASTER m LOCAL Gti Al U Hunu MIS1 MS2 CV SENSE L SLAVE LL REMOTE DRACO R1 R2 OUT CV CC VREFA1 A2 A4 AS Vs1 Vm Where Vm masters unit s output voltage Vs1 slave S1 unit s output voltage Vs2 51 Vs2 slave S2 unit s output voltage R4 V Figure 15 Auto Tracking Operation of Three Supplies LOAD CONSIDERATIONS This section provides information on operating your supply with various types of loads connected to its output PULSE LOADING T
8. 2 92 gt gt gt T r 2 OI c C ojl Of c m mf m mm N p oe o o1 a ZA O lt T ol 1 1 U my vj c T gt gt gt Ta n T s ER EE O c rn m am C Table A 10 Replaceable Parts List Cont d Reference Designator Agilent Part Description Mfr P N Mfr Number Code CR21 22 23 24 25 1901 0033 DIODE GEN PRP 180V 200MA 00 35 ALL 1N645 26 27 28 29 30 VR1 2 3 1902 0579 DIODE ZNR 5 1V 5 PD 1W IR 10UA ALL 1N4733APL 0471 RT1 2 0837 0261 DIODE VARISTOR ALL V275LA20A 34371 0160 0263 CAP FXD 0 22uF 20 50V CER m pues mn po res a 35 i i 3 RANSFORMER PULSE PRI IND 5MH 2 m 1 mmm 4H r A 4 ORE SHIELDING BEAD T T T T T J 1252 4159 ONNECTOR POST TYPE 2 5 PIN SPCG 11 0 ALL T ERMI TEST POINT 230IN ABOVE xm ag PER MISCELLANEOUS j ITCH SL SPDT SUBMIN 6A 250VAC 5 3101 3238 ITCH SL DPDT SUBMIN 6A 250VAC 58 3101 19 4 ITCH SL 2 DPDT STD 1 5A 250VAC PC GEN co co co 67 1 1 1 1 2 L1 1 SL 55 56 57 58 i 6 n ITCH PB DPSTALTNG 6A 250VAC ojl CO
9. t5Va 5Va 5Va 3 e RIS x ta U17 1 96k R115 LM336BZ 5 0 U12 OUTPUT i LM 398N OVERVOLTAGE n CIRCUIT m 2 6e i DE bd R122 E x 499 ve d OUTPUT 11 6 7 R79 7 OUTPUT VR2 56 E dV LFYH2CN lowe R96 x B U19B 49 9K 46 Hk R98 OUTPUT 9 8 R97 LEN 2 5 E 741 500 SR I K SN22204 I K NT py E 10K REIS 7 12 ED E K TURN ON arc PP 7 791500 VR2 _ E A 1N4733APL C57 R121 MEI OUTPUT 7 L6 Uk 3 1 NN 2 LM393N 4 1SV 19 6k 014 I 20 dg SND2204 B PS Jp JT US x R1 1 ae MCP 3020Z R77 ep 1 5 V VA 2 3 uy cug NU 47u CR2 al MCR26u u p OUTPUT 5V os R78 To UE OUTPUT UISA 3 U2 B gt 741500 NC NC E 6 M393N OVP LED Jed BB REF PIN ES un mnm DES NUMBER Or FSV IA OUTPUT SCR FIRING CIRCUIT CR17 s g Q7 a UF 4 4 CR14 ME OUTPUT me e OUTPUT CR16 P x UF4H Y R51 R53 OUTPUT OUTPUT 5V x x CR8 1 C28 2455 Ru2 UFY Y crit lt 5V OUTPUT x cuis Q6 05 Rug p a UF4 Y R47 x C19 R49 0UTPUT OUTPUT OUTPUT CONTROL CIRCUIT 6 x Ris CRS 5V lt 5V R22 U3A 31 6k dicis b 2 LF 347BN D 1 x C12 LM393N OUTPUT U2A OUTPUT 2 7 w LF3u7BN
10. ms Lv um ai 78 1 5W 2 6K 5 3W 825K 1 125W MOSFET N CHAN E MODE TO 204AE MOSFET N CHAN E MODE TO 204AE MOSFET E MODE TO 3 SI MOSFET N CHAN E MODE TO 3 SI Q5 8 NPN 2N2222A SI 0 18 PD 500MW2 NPN 2N2222A SI TO 18 PD 500MW NPN 2N2222A SI 0 18 PD 500MW2 NPN 2N2222A SI 0 18 PD 500MW2 PNP 2N2907A SI TO 18 PD 400MW PNP 2N2907A SI TO 18 PD 400MW I CR3 4 5 6 7 DIODE GEN PRP 180V 200MA D0 35 DIODE GEN PRP 180V 200MA D0 35 CR11 14 DIODE PWR RECT 400V 50 5 DO 41 DIODE PWR RECT 400V 1 50NS D TRANSFORMER POWER FOR E3614A TRANSFORMER POWER FOR E3615A TRANSFORMER POWER FOR E3616A TRANSFORMER POWER FOR E3617A A 19 BIAS AND REFERENCE VOLTAGE CIRCUIT J1 1 MC78USCT x SV 1 J1 2 0UTPUT 15V R1 8 DES 1 CR32 3 VR 2 b INP OUT 9 UFY Y cue M pec ram 10V d ud reir 3 LF442CN k 7 1 g 1u DEOR OUTPUT J1 5 OUTPUT eene VR1 1N4733APL Q 5 1V J1 10 R110 1 lt 12 UFY Y MC7912CT D SERIES PASS TRANSISTOR AND Jei CURRENT BALANCING CIRCUIT HH NN MM aN d D C27 C24 i CR18 CR15 MCR264 4 MCR264 4 E CONSTANT VOLTAGE CONTROL CIRCUIT AC ACC CR23 1N64S C30 1u C29 R62 V a x x x C8 C7 R
11. 1 8 Overvoltage Protection 1 8 CONNECTING LOADS 52 Sa ee eder uhu meg T ens gast be 1 8 OPERATION BEYOND RATED 1 8 REMOTE OPERATING 6 1 m 1 9 Remote Voltage Sensing 1 2 1 9 Remote Analog Voltage 0 1 9 MULTIPLE SUPPLY 1 10 NORMAL PARALLEL OPERATION 1 10 AUTO PARALLEL 2 1 10 NORMAL SERIES 2 1 11 AUTO SERIES OPERATION 1 12 AUTO TRACKING OPERATON 2 1 13 LOAD 5 1 14 PULSE LOADING Pere IA REA e sido 40 qid V EAS 1 14 REVERSE CURRENT LOADING 1 14 OUTPUT CAPACITANCE 414 4 1 14 REVERSE VOLTAGE 1 1 14 B
12. 31 6k LM339 LM393N R28 5 8 2 LF 347BN A OUTPUT LF 347BN U7 LM336BZ SCR FIRING GIRGUTT CR17 gt 16 gt UFU gu SCR FIRING CIRCUIT HH KK JJ CR8 gt UFH Y CR9 gt UFH Y s 2N2907A OUTPUT e 2N29 7A OUTPUT 1 SCR CONTROL CIRCUIT U3A 2 LM393 3 9 OUTPUT G U3B S LM393 R28 u9 9K LF 34 7BN R25 562 15V FON R24 1 K 3 LM339N E m 31 6k 14 LF 347BN e 12 R23 82 5K 5V 1 7 LF 347BN R21 31 6k LM339N R20 82 5K 8 14 1 LF 34 7BN LM339N OUTPUT U7 LM336BZ Manual Supplement Supplement Agilent Part Number 5959 5336 Edition 4 Supplement Print Date 14 April 2000 This supplement updates the following document Agilent E361XA 60W Series Lab Bench DC Power Supplies Manual Agilent Part Number 5959 5310 What is a manual supplement A manual supplement keeps your manual up to date The supplement which consists of additional pages for your manual is shipped with the manual that it updates Additional pages have page numbers with a lower case letter For example if one additional page is added between pages 1 10 and 1 11 it will be numbered 1 10 1 This supplement is new information that was not described in the manual for remote programming of the E3614A E3615A E3616A E36174A with a voltage or current so
13. dl remote Model Rs E3614A 0 1 ohm 0 1 10W 7 E3615A 0 1 ohm 0 1 10W DIGITAL E3616A 0 1 ohm 0 1 10W VOLTMETER E3617A ohm 1 SW Figure A 9 Calibration Test Setup Ammeter and CC Set Calibration To calibrate ammeter and CC set proceed as follows a Connect test setup on Figure A 9 b Turn VOLTAGE and CURRENT control fully clock wise c Turn on the supply and to calibrate ammeter adjust R5 on the display board until front panel AMPS dis play reads exactly DVM value divided by Rs d Tocalibrate CC Set adjust R69 on the main board until front panel AMPS display reads exactly DVM value divided by Rs while depressing OVP CC Set Switch Voltmeter and OVP Set Calibration To calibrate voltmeter and OVP set proceed as follows a Disconnect Rs from test setup on Figure A 9 and connect DVM across output terminal of the supply b Turn on the supply c Tocalibrate voltmeter for E3614A adjust R16 on the display board until front panel VOLTS display reads exactly DVM value To calibrate voltmeter for E3615A E3616A and E3617A set the output voltage below 18V ex 15V and adjust R16 on the display board until front panel VOLTS display reads exactly DVM value Next set the output voltage above 20V ex 21V and adjust R17 on the display board until front panel VOLTS display reads exactly DVM value d To calibrate OVP Set turn down the
14. Figure A 4 Basic Test Setup A 4 Line Regulation Source Effect Definition Line regulation is the change in the steady state value of dc output voltage due to a change in ac input voltage from a minimum to a maximum value 10 of nominal volt age Test Parameter Measured Variable Output Voltage Expected Results Less than 0 01 plus 2 mV Test Procedure a Connect the test equipment as shown in Figure A 4 Operate the electronic load in constant current mode and set its current to the full rated value of the power supply b Connect the supply to the ac power line through a variable autotransformer which is set for low line volt age 104 Vac for nominal 115 Vac 90 Vac for nominal 100 Vac and 207 Vac for nominal 230 Vac c Turn the supply s power on and turn CURRENT con trol fully clockwise d Adjust VOLTAGE control until the front panel VOLTS display indicates exactly the maximum rated output voltage e Record voltage indicated on the digital voltmeter f Adjust autotransformer to high line voltage 127 Vac for nominal 115 Vac 110 Vac for nominal 100 Vac and 253 Vac for nominal 230 Vac g When the reading settles record the output voltage again Check that the two recorded readings differ less than 0 01 of output voltage plus 2 mV Load Transient Response Time Definition This is the time for the output voltage to return to within a specified band around its voltage following a change from full load t
15. R2 100 Where Vout is the power supply output voltage A is the gain factor and the values of each model are as below Vggr is between 10 11 V and 11 40 V R 92800 x R1 92800 R2 40 Model A E3614A 0 8 E3515A 2 0 E3616A 3 5 E3617A 6 0 1 10 6 Remote Resistor Programming Constant Current MASTER 34 LOCAL 4 m 2 M S1 52 SENSE L SLAVE L REMOTE 5 OUT 5 CC VREF A1 A2 5 Figure 8 Set the CC switch down on the rear panel and all others up Iout Vggp x R R R2 100 j Where IS the power supply output current A is the gain factor and the values of each model are as below Vggr is between 10 11 V and 11 40 V R 92800 x R1 92800 R1 R22 40 Model A E3614A 0 6 E3515A 0 3 E3616A 0 17 E3617A 0 1 1 10 7 eA Agilent Technologies CERTIFICATION Agilent Technologies certifies that this product met its published specifications at time of shipment from the factory Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Stan dards and Technology formerly National Bureau of Standards to the extent allowed by that
16. output Figure 6 Set the CC switch down and all others up In VA x ut Tout A x Vin Where Common IS the power supply output current in amps Ij is the programming current in Lamps A is the gain Model A uA 1 A uV A E3614A 0 055 18 E3515A 0 0278 35 9 E3616A 0 0158 63 4 E3617A 0 00928 108 Programming currents can be increased by adding a resistor across the and CC A 10 volts drop across R1 represents full scale current of the power supply When a 1 kohm resistor is added across the programming currents are as follows with the programming current in mA Model A A mV 1 A mA A ere value ry Kohn E3614A 0 594 1 69 17 515 0 297 3 37 3 45 E3616A 0 168 5 95 6 28 E3617A 0 0989 1 01 112 Current Monitoring Current of the power supply can be monitored across the internal current monitoring resistor One side of the resistor is at the output and the other side of the resistor is at 1 The table below shows the resistor value and conversion factors To obtain the current divide the measured voltage by the resistor value or multiply the amps V times the voltage measured Model valdc O amps V E3614A 0 1 10 E3515A 0 2 5 E3616A 0 6 1 67 E3617A 0 89 1 12 1 10 5 NOTE Voltage and Current Programming of the E3614A 15A 16A 17A with Resistors Remote programming with resistors permits
17. page 1 6 OEM Input power 115 Vac 10 47 63 Hz 0 Input power 230 Vac 10 47 63 Hz OE9 Input power 100 Vac 10 47 63 Hz 012 One additional manual ACCESSORY The accessory listed below may be ordered from your local Agilent Technologies Sales Office either with the power sup ply or separately Refer to the list at the rear of the manual for address Agilent Part No Description 5063 9240 Rack Kit for mounting one or two 3 1 2 high supply in a standard 19 rack The rack mount kit is needed for rack mounting of all models in the Agilent E361xA power supply because these supplies have molded feet DESCRIPTION This power supply is suitable for either bench or rack mounted operation It is a compact well regulated Constant Voltage Constant Current supply that will furnish full rated output voltage at the maximum rated output current or can be continuously adjusted throughout the output range The out put can be adjusted both locally from the front panel and remotely by changing the settings of the rear panel switches See paragraph REMOTE OPERATING MODES page 1 9 The models in this family offer up to 60 watts of output power with voltage up to 60 volts and current up to 6 amps as shown in Table 1 The front panel VOLTAGE control can be used to establish the voltage limit when the supply is used as a constant cur rent source and the CURRENT control can be used to estab lish the output current limit when the
18. CAP FXD 0 33UF 10 50V POLYE FL CAP FXD 0 01UF 10 100V CER X7R CAP FXD 1UF 10 50V CER X7R CAP FXD 0 01UF 10 100V CER X7R gt p and DO gt mciu ol 5 Of of gt LET Fa ce 2848 848 3299 2848 2848 2848 gt r DO gt LL 1 35905 17 103 gt gt et pag oj of I gt pot gt RB gt p DO DO AD oj 2848 848 2848 2848 2848 2848 2848 feer eo af ss m e m feer m e feer CZ CL CL FS gt DO DA on 7 gt P oj rum oj gt Table A 10 Replaceable Parts List Cont d CAP FXD 1UF 10 630V POLYE FL 14 15 FXD 1000PF 5 100V CER COG 14 20 50V AL ELECTLT 14 1 FXD 0 33UF 10 250V POLYE MET ALL FXD 0 01UF 10 100V CER X7R 4 15 4700PF 2 50V POLYP FL ALL FXD 1000PF 5 100V CER COG Agilent Part Number 0160 7077 0160 4822 0180 3970 0160 6225 0160 4832 0160 7673 0160 7075 016 Mfr Code Reference Designator C33 35 44 45 46 56 ojl o ALL 016 016 016 018 018 0180 4437 0160 4065 0160 7049 0160 7363 0160 4808 FXD 2200PF 10 50V CER 5 ALL CAP FXD 100PF 5 100V CER C
19. Group 1 Class A Emissions As detailed in Electromagnetic Compatibility EMC Certificate of Conformance Number CC TCF 00 102 based on Technical Construction File TCF ANJ12 dated Dec 20 2000 Assessed by Celestica Ltd Appointed Competent Body Westfields House West Avenue Kidsgrove Stoke on Trent Straffordshire ST7 United Kingdom Safety Information and Conforms to the following safety standards IEC 61010 1 2001 EN 61010 1 2001 CSA 22 2 No 1010 1 1992 This DoC applies to above listed products placed on the EU market after January 1 2004 Date Bill Darcy Regulations Manager For further information please contact your local Agilent Technologies sales office agent or distributor or Agilent Technologies Deutschland GmbH Herrenberger Strafe 130 D71034 B blingen Germany Revision B 00 00 Issue Date Created on 11 24 2003 3 10 Document No KIO 10 32 11 24doc doc PM
20. OVP Adjust screwdriver control on the front panel slowly until the OVP circuit trips Record the output voltage when the OVP trip occurs Then adjust R97 on the main board until front panel VOLTS display reads exactly OVP trip voltage while depressing OVP CC Set switch TROUBLESHOOTING Before attempting to troubleshoot the power supply ensure that the fault is with the supply and not with an associated cir cuit The performance test enables this to be determined without having to remove the covers from the supply NOTE The applicable test points are identified by encircled numbers on the schematic diagrams at the rear of the manual Figure A 10 Figure A 11 Figure A 12 and Figure 13 A good understanding of the principles of operation is a help ful aid in troubleshooting and it is recommended that princi ples of operation in this manual be reviewed before attempting to troubleshoot the supply Once the principles of operation are understood refer to the overall troubleshooting procedures paragraph to locate the symptom and probable cause Once the defective component has been located by means of visual inspection or trouble analysis replace it and recon duct the performance test After a component is replaced perform the meter calibration A 8 Overall Troubleshooting Procedure To locate the cause of trouble follow steps 1 2 and 3 in sequence Before attempting overall troubleshooting ensure that the rear panel swi
21. accesso ries Each rack mounting kit includes complete installation 1 6 DC ISOLATION 240 Vdc maximum between either output terminal and earth ground including the output voltage COOLING Convection cooling is employed WEIGHT 12 1 Ibs 5 5 Kg net 14 9 Ibs 6 75 Kg shipping Operating Characteristics instructions 345 40mm 8810mm 88 10mm 1 373 40mm Figure 1 Outline Diagram INPUT POWER REQUIREMENTS This power supply may be operated from nominal 100 115 or 230 Vac 47 63 Hertz power source A label on the rear panel shows the nominal input voltage set for the unit at the factory If necessary you can convert the supply to another nominal input voltage by following the instructions below Line Voltage Option Conversion Line voltage conversion is accomplished by adjusting two compo nents the line select switch and the rear panel fuse F1 To con vert the supply from one line voltage option to another proceed as follows a Disconnect power cord b Turn off the supply and remove the top cover by lifting the cover upwards after taking it off from both sides of the chassis by inserting a flat blade screwdriver into the gap on the lower rear portion of the cover C Settwo sections of the line voltage selector switch on the PC board for the desired line voltage see Figure 2 d Checkthe rating of the fuse F1 installed in the rear panel fuse holder
22. and replace with the correct fuse if necessary For 100 and 115 V operation use a normal blow 2 A fuse and for 230 V use a time delay 1 A fuse e Replace the cover and mark the supply clearly with a tag or label indicating the correct line voltage and fuse that is in use lt FRONT OF SUPPLY Figure 2 Line Voltage Selector set for 115 Vac Power Cord To protect operating personnel the instrument should be grounded This instrument is equipped with a three conductor power cord The third conductor is the ground conductor and when the power cord is plugged into an appropriate receptacle the supply is grounded The power supply was shipped with a power cord for the type of outlet used at your location If the appropriate cord was not included contact your nearest Agilent Sales Office to obtain the correct cord OPERATING INSTRUCTIONS INTRODUCTION This section explains the operating controls and indicators and provides information on many operating modes possible with your instrument The front panel controls and indicators are illustrated in Figure 3 gilent mseataA osv oma Z 666 t mea TF Figure 3 Front Panel Controls and Indicators 1 LINE Switch Pressing this switch turns the supply on or off 2 VOLTAGE Control Clockwise rotation increases output volt age 3 CURRENT Control Clockwise
23. at 40 C 55 C TEMPERATURE COEFFICIENT Maximum change in output per C after a 30 minute warm up Constant Voltage Less than 0 02 plus 500 uV Constant Current E3614A Less than 0 02 plus 3 mA E3615A Less than 0 02 plus 1 5 mA E3616A Less than 0 02 plus 1 mA E3617A Less than 0 02 plus 0 5 mA 1 5 STABILITY OUTPUT DRIFT Maximum change in output for an 8 hours following a 30 minute warm up under constant line load and ambient temperature Constant Voltage Less than 0 196 plus 5 mV Constant Current Less than 0 196 plus 10 mA LOAD TRANSIENT RESPONSE TIME Less than 50 usec for output recovery to within 15 mV following change in output current from full load to half load or vice versa METER ACCURACY 0 5 of output 2 counts at 25 59C METER PROGRAMMING RESOLUTION Voltage E3614A 10 E3615A 10 mV 0 to 20 V 100 mV above 20 V E3616A 10 mV 0 to 20 V 100 mV above 20 V E3617A 10 mV 0 to 20 V 100 mV above 20 V E3614A 10 mA E3615A 10 mA E3616A 1 E3617A 1 Current OVERLOAD PROTECTION A continuously acting constant current circuit protects the power supply for all overloads including a direct short placed across the terminals in constant voltage operation The constant voltage cir cuit limits the output voltage in the constant current mode of oper ation OVERVOLTAGE PROTECTION Trip voltage adjustable via front panel control E3614A E3615A E3616A 6
24. control of the regulated output or current by means of a remotely varied resistor The sum of the resistance of external programming resistors R2 should be more than 40 kohm To have more precise output voltage use a variable resistor more than 40 kohm The voltage control on the front panel is disabled during remote resistor programming Do not operate the power supply simultaneously in the remote analog voltage programming and in the remote resistor programming Remote Resistor Programming Connections Remote resistor programming requires changing the setting of the switches and connecting external resistors between and terminals of and VREF terminal or and terminals of CC and VREF terminal Any noise picked up on the programming leads will appear on the power supply s output and may degrade regulation To reduce noise pickup use a twisted or shielded pair of wires for programming with the shield grounded at one end only Remote Resistor Programming Constant Voltage r MASTER 4 go TS NM 2 PERN 51 52 SENSE CC Var A1 2 A4 L SLAVE LL REMOTE 5 OUT 5 Figure 7 Set the CV switch down on the rear panel and all others up Vout A X Vggp X R R
25. current Resetting OVP If OVP shutdown occurs reset the supply by turning power off Wait one or more seconds and turn power on again If OVP shutdown continue to occur check the connections to the load and sense terminals and check the OVP limit setting NOTE Strong electrostatic discharge to power supply can make OVP trip and eventually crowbar the output which can effectively protect output loads from the hazardous ESD current CONNECTING LOADS The output of the supply is isolated from earth ground Either out put terminal may be grounded or the output can be floated up to 240 volts off ground Total output voltage to ground must not exceed 240 Vdc Each load should be connected to the power supply output terminals using separate pairs of connecting wires This will minimize mutual coupling effects between loads and will retain full advantage of the low output impedance of the power supply Each pair of connecting wires should be as short as possible and twisted or shielded to reduce noise pick up If a shield is used connect one end to the power supply ground terminal and leave the other end unconnec ted If load considerations require that the output power distribution terminals be remotely located from the power supply then the power supply output terminals should be connected to the remote distribution terminals via a pair of twisted or shielded wires and each load separately connected to the remote distribution term
26. duration could be present in the ripple and not appreciably increase the rms value Test Parameter Measured Variable Output Voltage rms Expected Results Less than 200 uV rms Test Procedure a Connectthe test equipment as shown in Figure A 6 b Turn the supply s power on and turn CURRENT con trol fully clockwise Turn up output voltage to the full rated value Check that the supply s CV indicator remains lighted Reduce VOLTAGE control if not lighted d Check that the rms noise voltage at the true rms volt meter is less than 200 uV A 5 POWER SUPPLY UNDER TEST TRUE RMS 7 VOLTMETER R 1 3 ohm 60W 6 6 ohm 60W 20 5 ohm 60W 60 ohm 60W Figure A 6 CV PARD RMS Measurement Test Setup PARD Peak to Peak Measurement The peak to peak measurement is particularly important for applications where noise spikes could be detrimental to a sensitive load such as logic circuitry Test Parameter Measured Variable Output voltage peak to peak Expected Results Less than 1 mV p p 20 Hz 20 MHz Test Procedure a Connect the test equipment as shown in Figure 7 b Turn the supply s power on and turn CURRENT con trol fully clockwise c Turn up output voltage to the full rated value Check that the supply s CV indicator remains lighted Reduce VOLTAGE control if not lighted d Set the oscilloscope to AC mode and b
27. full output to assure CC operation For output current measurements the current monitoring resistor must be treated as a four terminal device Refer to the Measure ment Techniques for details All constant current measure ments are made in terms of the change in voltage across this resistor the current performance is calculated by dividing these voltage changes by ohmic value of Rs Load Regulation Load Effect Definition CC Load regulation is the change in the steady state value of dc output current due to a change in load resistance from short circuit to full load or from full load to short circuit Test Parameter Measured Variable Output Current Expected Results Less than 0 0196 plus 250 uA Test Procedure a Connect the DVM across Rs in Figure A 4 Operate the electronic load in constant voltage mode and set its voltage to the full rated value of power supply b Turn the supply s power on and turn VOLTAGE con trol fully clockwise c Turn up output current to the full rated value Check that the AMPS display reads full rated values and CC indicator remains lighted Reduce CURRENT control if not lighted d Record the voltage across Rs and convert it to cur rent by dividing this voltage by Rs e Operate the electronic load in short input short mode f When the reading settles record voltage across Rs again and convert it current Check that the two recorded readings differ less than 0 0196 of output current plu
28. is useful to open the loop since measurements made anywhere within a closed loop may appear abnormal With a loop closed it is very difficult to sep arate cause from effect As described in Tables A 4 and A 5 the conduction or cutoff capability of each stage is checked by shorting or opening a previous stage as follows 1 Shorting the emitter to collector of a transistor simu lates saturation or the full ON condition 2 Shorting the emitter to base of a transistor cuts it off and simulates an open circuit between emitter and collector Although a logical first choice might be to break the loop somewhere near its mid point and then perform successive subdividing tests it is more useful to trace the loop from the series regulator backwards a stage at a time since loop fail ures occur more often at the higher power levels Preregulator Feedback Loop The preregulator feedback loop SCR control circuit can be conveniently checked using Table A 6 As indicated in Table A 6 the control circuit is checked by starting with the waveform at point 7 and point 6 shown on the schematic diagram and tracing forwards and backwards from this point Overvoltage Protection Circuit Troubles When troubleshooting the overvoltage protection circuit it is useful to check the turn on overshoot control circuit which includes U20 and Q10 The function of the control circuit is to slow down the rising speed of the 15 V bias the moment the power is
29. operation When a master unit shuts down it programs any slave units to zero output When a slave unit shuts down it shuts down only itself Remote Sensing To include remote sensing with auto tracking operation independently set up each unit for remote sensing according to the remote sensing instructions under previous paragraph Remote Analog Programming To simultaneously remote pro gram both units output voltages set up only the master unit for remote voltage programming according to the remote program ming instructions To vary the fraction of the output voltage contri bution by the slave unit connect a variable resistor in place of R2 in two units operation To independently remote program each unit S output current setting set up each unit for remote control of output current according to the instructions under Remote Pro gramming Constant Current paragraph MASTER POWER SUPPLY r wAsTER r LOCAL 2 2 MS1 MS2 CV CC SENSE Le SLAVE LLL REMOTE 8 CC 1 2 A4 A5 SLAVE POWER SUPPLY LOCAL AU 2 2 7
30. organization s calibration facility and to the calibration facilities of other International Standards Organization members WARRANTY This Agilent Technologies hardware product is warranted against defects in material and workmanship for a period of three years from date of delivery Agilent software and firmware products which are designated by Agilent for use with a hardware product and when properly installed on that hardware product are warranted not to fail to execute their programming instruc tions due to defects in material and workmanship for a period of 90 days from date of delivery During the warranty period either Agilent or Agilent Technologies will at its option either repair or replace products which prove to be defective Agilent does not warrant that operation the software firmware or hardware shall be uninterrupted or error free For warranty service with the exception of warranty options this product must be returned to a service facility designated by Agilent Return to Englewood Colorado Service Center for repair in United States 1 800 258 5165 Customer shall prepay shipping charges by and shall pay all duty and taxes for products returned to Agilent for warranty service Except for the products returned to Customer from another country Agilent shall pay for return of products to Customer Warranty services outside the country of initial purchase are included in Agilent s product price only if Customer pays Agilent
31. output terminals This will allow the supply to automatically com pensate for the voltage drop in the load leads and improve regula tion When the supply is connected for remote sensing the OVP circuit senses the voltage at the sense leads and not the main output terminals NOTE Remote voltage sensing compensates for a voltage drop of up to 0 5 V in each load and there may be up to a 0 1 V drop between the output terminal and the internal sensing resistor at which point the OVP circuit is connected There fore the voltage sensed by the OVP circuit could be as much as 1 1 V more than the voltage being regulated at the load It may be necessary to re adjust the OVP trip voltage when using remote sensing CV Regulation Notice that any voltage drop in the sense leads adds directly to the CV load regulation In order to maintain the specified performance keep the sense lead resistance to 0 5 ohms per lead or less Remote Sensing Connections Remote sensing requires changing settings of the rear panel switch and connecting the load leads from and output terminals to the load and connect ing the sense leads from the S and S terminals to the load as shown in Figure 5 CAUTION Observe polarity when connecting the sensing leads to the load 1 9 Output Noise Any noise picked up on the sense leads will appear at the supply s output voltage and may degrade CV load regulation Twist the sense leads to minimize t
32. output voltage to 25 V 2 V for E3616A Set output voltage to 44 V 5 V for E3617A 7 Waveform form from TP6 a Normal firing pulse CR10 CR12 Q5 Q6 common to point 7 defective b No firing pulse Proceed to step 8 8 Voltage from TP6 common a Low voltage 12 V 03 defective to U4 pin 14 b High voltage 45 V Proceed to step 9 9 Voltage from TP6 common a High voltage 415 V 04 defective to U5 pin 14 b Low voltage 12 V Proceed to step 10 10 Voltage from pin 8 to a Measured voltage is positive U5 defective pin 9 of U5 b Measured voltage is negative U6 defective Table A 7 Overvoltage Protection Circuit Troubleshooting STEP ACTION RESPONSE PROBABLE CAUSE 1 Short U19 pin 4 to TP6 Shutdown release a 020 defective or C57 OVP indicator OFF shorted Output voltage remains b Proceed to step 2 shutdown 0 V 2 Measure the voltage from High voltage 5 V a U19 defective or proceed step 3 TP6 common to TP9 Low voltage 0 V b U4D defective 3 Measure the voltage from Below 2 6 V U12 or 08 defective TP6 common to TP8 Above 2 6 V b U18 defective REPLACEABLE PARTS INTRODUCTION This section contains information for ordering replacement parts Table A 10 lists parts by reference designators and pro vides the following information o ooo f Mechanical and miscellaneous parts are not identified by ref Reference designators Refer to Table A 8 Agilent Techn
33. rotation increases output cur rent 4 DISPLAY OVP CC SET Switch Pressing this switch causes the VOLTS display to show voltage setting for overvoltage shutdown trip voltage and the AMPS display to show the current control set value Setting values are either front panel settings or remote voltage programmed settings 5 OVP Adjust Screwdriver Control While pressing the DIS PLAY OVP CC SET switch rotating the control clock wise with a small flat blade screwdriver increases the setting for overvoltage shutdown 6 VOLTS Display Digital display of actual output voltage or OVP shutdown setting 7 AMPS Display Digital display of actual output current or output current setting 8 CV LED Indicator Output voltage is regulated when lighted This means the power supply is operating in the constant volt age mode 9 CC LED Indicator Output current is regulated when lighted This means the power supply is operating in the constant cur rent mode 10 OVP LED Indicator Output is shutdown by the occurrence of an overvoltage when lighted Removing the cause of over voltage and turning the power off then on resets the power supply TURN ON CHECKOUT PROCEDURE The following checkout procedure describes the use of the front panel controls and indicators illustrated in Figure 3 and ensures that the supply is operational
34. stable low noise resistors NOTE It is recommended to connect a 0 1 uF capacitor in paral lel with R2 in two supplies operation or R2 and R4 in three supplies operation to ensure the stable operation Setting Voltage and Current Use the master unit s controls to set the desired output voltage and current The VOLTAGE control of the slave unit is disabled Turning the voltage control of the master unit will result in a continuous variation of the output of the series combination with the contribution of the master s output voltage to that of the slave s voltage always remaining in the ratio of the external resistors Set the CURRENT control of slave unit above the master unit s current setting to avoid having the slave switch to CC operation When in CC operation the combined output current is the same as the master unit s current setting and when in CV operation the combined output voltage is the sum of the master unit s and the slave unit s output voltages Overvoltage Protection Set the OVP shutdown voltage in each unit so that it shuts down at a voltage higher than its output voltage during auto series operation When a master unit shuts down it pro grams any slave units to zero output When a slave unit shuts down it shuts down only itself and any slaves below it in the stack The master and all slaves above the shut down slave continues to sup ply output voltage MASTER POWER SUPPLY MASTER LOCAL
35. supply is used as a constant voltage source The supply will automatically cross over from constant voltage to constant current operation and vice versa if the output current or voltage exceeds these pre Set limits The front panel includes an autoranging E3614A single range digital voltmeter and a single range digital ammeter Two 3 1 2 digit voltage and current displays accurately show the output voltage and current respectively The output rat ings for each model are shown in the Specifications and Operating Characteristics Table The OVP CC SET switch is used to check the OVP trip volt age and current control set value When pressing this switch the voltage display indicates the OVP trip voltage and the cur rent display indicates the current control set value The power supply has both front and rear output terminals Either the positive or negative output terminal may be be grounded or the power supply can be operated float ing at up to a maximum of 240 Volts off ground Total out put voltage to ground must not exceed 240 Vdc LINE FUSE Line Voltage Fuse Agilent Part No 100 115 Vac 2 0 AT 2110 0702 230 Vac 1 0 AT 2110 0457 SPECIFICATIONS Detailed specifications for the power supply are given in Table 1 All specifications are at front terminals with a resistive load and local sensing unless otherwise stated Operating charac teristics provide useful but non warranted information in the form of the nominal perform
36. voltage control of output voltage A 1 Vdc change in the remote programming voltage produces a change in output voltage volt age gain as follows E3614A 0 8 Vdc E3615A 2 Vdc E3616A 3 5 Vdc 617 6 Vdc I MASTER Jf HET MS1 MS2 ov cc SENSE E CC VREF M 2 A4 A5 L SLAVE JL REMOTE NOTE See the supplementary Manual if you are not using isolated programming voltage source Figure 6 Remote Voltage Programming Constant Voltage Remote Programming Constant Current Figure 7 shows the rear panel switch settings and terminal connections for remote voltage control of output current A 1 Vdc change in the remote programming voltage produces a change in output current cur rent gain as follows E3614A 0 6 Adc E3615A 0 3 Adc E3616A 0 17 Adc E3617A 0 1 Adc MASTER r Z HHHHHHI MS MS2 cv cc SENSE 109 E VREF A2 A4 AS L SLAVE JL REMOTE NOTE See the supplementary Manual if you are not using isolated programming voltage source Figure 7 Remote Voltage Programming Constant Current Remote P
37. 1 MS2 SENSE L SLAVE L REMOTE 1 CC VREF A2 4 AS SLAVE POWER SUPPLY T MASTER LOCAL e e AA Zr cg ANE MS MS2 CV CC SENSE L SLAVE 1 L REMOTE Figure 9 Auto Parallel Operation of Two Supplies Overvoltage Protection Adjust the desired OVP shutdown limit using the master unit s OVP Adjust control Set the slave units OVP limits above the master s When a master unit shuts down the master programs the slave units to zero voltage output If a slave unit shuts down it shuts only itself down If the required cur rent is great enough the master will switch from CV to CC opera tion Remote Sensing To remote sense with auto parallel operation connect remote sense leads only to the master unit according to the remote sensing instructions Remote Analog Voltage Programming To remote program with auto parallel operation set up only the master unit for remote pro gramming according to the remote programming instructions MASTER POWER SUPPLY 5 HHHH
38. 11 10V sS C36 x R8uQ 2200p R125 10k c62 7 LF 347BN F SHUT DOWN CIRCUIT 2 4036 R18 R19 10 Ik 1 96k O 11 OUTPUT KK JJ I LL B G p 8 394E E 59 0 D Re8 46 uk R81 19 6k R86 46 4k 100 0UTPUT x DD ru Re1 2 61k Iin J1 6 15V I CONSTANT CURRENT CONTROL CIRCUIT 15V C33 1 p Gat g 01u LF 347BN 13 666 46 4k LF 347BN SSA SENSE S 12 QA TB 12 A6 TB CW 12 as TB CV CC INDICATOR CIRCUIT 15V RT2 LIN 12 2 A12 TB RED LM393N 12 2 A13 TB S7B x R9 bo i BB o cs T 1u SSB SENSE 2 ol uc TB 3 x qp OUTPUTREAR J1 9 OUTPUREAR 12 2 A18 CAS QUTPUT TE SET SW J1 7 LM393N V 12 y 5 M O _ VMMV T R J T TB 39 SET SW lo C CR3 m 7 1N645 A C38 M S 1 0 01 R73 Be 100k TOHE 12 TPS CR29 Q A10 ca 1N645 R126 Q LABEL 7 010 52 1 v 1 8 12 7 A9 Vref Ies y Ae d 12 14695 U9D R91 52 CC CC 0UT S CV CV CA2 CAU S 2 0UT G OVER VOLTAGE PROTECTION CIRCUIT
39. 14 15 RESISTOR 100K 1 125W TF TC 0 100 14 15 R RESISTOR 1K 1 125W TF TC 0 100 ALL RESISTOR 1 96K 1 125W TF IC 0 100 RESISTOR 82 5K 1 125W TF TC 0 100 2848 2848 2848 2848 2848 2848 Reference Designator R24 26 27 37 38 64 88 117 120 R25 30 33 R28 111 R29 68 86 89 91 92 95 96 99 114 T21 3 3 R43 45 55 57 R46 53 R47 50 R49 51 R58 59 R58 R R58 59 0 8 R61 Agilent Part Number 0757 0442 0698 8824 0698 3228 0698 3162 0698 0084 0757 0288 0698 3518 0757 0439 0757 0441 0698 8580 0757 0440 0698 4471 0698 3498 0757 0442 0757 0431 0698 4438 0698 0063 0757 0439 0698 4473 0757 0454 0698 4503 0757 0467 0757 0346 0698 3438 0757 0293 0757 0401 0757 0489 0698 4123 0757 0293 0811 3909 0811 3909 0811 4118 0811 3861 0811 1799 0813 0001 0811 0071 0811 1808 0698 0085 0698 7634 0698 4514 0757 0481 Table A 10 Replaceable Parts List Cont d ME GJ RESISTOR 10K 1 125W TF TC 0 100 RESISTOR 2 15 125 T T RESISTOR 6 81 RESISTOR 8 25 RESISTOR 9 53 RESISTOR 7 5K RESISTOR 7 15 RESISTOR 8 66 RESISTOR 10K 1 RESISTOR 2 43 RESISTOR 5 23 RESISTOR RESISTOR 147 R R RESISTOR RESISTOR RESISTOR 499 RESISTOR 1 96K 1 125 RESISTOR 0 2 1 10W P RESISTOR 0 2 1 10W P RESISTOR 0 6 1 10W P RESISTOR 1 78 1 5W P RESTSTOR 390 5 3W RESIS
40. 17 2 5 10V 2 5 23 25 39V 5 65 Minimum setting above output voltage to avoid false tripping 496 of output 2 V for all models Range Margin REMOTE ANALOG VOLTAGE PROGRAMMING 25 59C Remotely varied voltage from 0 to 10 V provides zero to maxi mum rated output voltage or current Voltage Linearity 0 5 Current Linearity 0 5 The programming inputs are protected against input voltages up to 40 V REMOTE SENSING Meets load regulation specification when correcting for load lead drops of up to 0 5 V per lead with sense wire resistance of less than 0 5 ohms per sense lead and lead lengths of less than 5 meters Table 1 Specifications and Operating Characteristics Cont d REMOTE PROGRAMMING SPEED Maximum time required for output voltage to change from initial value to within a tolerance band 0 196 of the newly programmed value following the onset of a step change in the programming input voltage Full load 3 msec 9 msec 85 msec 200 msec 7 msec 13 msec 65 msec 200 msec No load 2 msec 6 msec 85 msec 200 msec 1 6 sec 2 2 sec 1 8 sec 3 2 sec Up E3614A E3615A E3616A E3617A E3614A E3615A E3616A E3617A Down INSTALLATION INITIAL INSPECTION Before shipment this instrument was inspected and found to be free of mechanical and electrical defects As soon as the instru ment is unpacked inspect for any damage that may have occurred in transit Save all packing materials unti
41. 20 22 N R93 94 R98 R98 Koj 22 20 20 d AI d ZB rR ep rey of co O R103 R104 107 Agilent Part Number 0698 8826 0698 8827 0757 0274 0757 0438 2100 4306 0698 3243 0698 3459 0698 3158 0757 0465 0757 0289 0757 0290 0757 0458 0698 8123 0757 0444 0698 3245 0698 3136 0698 3430 0757 0395 0698 4767 0698 3460 0698 8825 0698 8827 0698 3157 0698 8123 0757 0461 0757 0440 0698 3444 0757 0346 0698 3581 2100 4357 2100 4305 0698 3455 0757 0465 0757 0461 0698 3160 0698 4123 0698 3441 0698 3438 0757 0428 0698 3156 0698 3153 0757 0462 Table A 10 Replaceable Parts List Cont d Q ty Description RESISTOR 316 1 125W TF IC 0 100 RESISTOR 10 1 125W TF TC 0 100 RESISTOR 13 7K 1 125 RESISTOR VAR 10K 10 RESISTOR 68 1K 1 125W TF IC 0 100 RESISTOR 499 1 125WT RESISTOR 2 RESISTOR 14 0 100 F TC 0 100 F TC 0 100 TF 1C 0 100 TF 100 5 1 125WT 7 1 125WT RESISTOR 1 62K 1 125 RESISTOR 14 7K 1 125 RESISTOR 3 83K 1 125 RESISTOR 75K 1 125W T F TC 0 100 RESISTOR 825K 4 12 125W TF TC 0 100 28480 RESISTOR IM 1 125W TF TC 0 100 ALL 28480 RESISTOR 1 21K 1 125W TF TC 0 100 ALL RESISTOR 5 11K 1 125W TF TC 0 100 ALL j 28480 RESISTOR TRMR 50K 10 TKF TOP ADJ 25 T ALL 32
42. 96Y 1 503 32997 RESISTOR 178K 4 12 125W TF TC 0 100 28480 RESISTOR 383K 1 125W TF IC 0 100 5 28480 uum RESISTOR 100K 1 125W TF TC 0 100 7 8480 RESISTOR 13 3K 1 125W TF 0 100 14 pew RESISTOR 6 19K 1 125W TF TC 0 100 15 28480 RESISTOR 51 1K 1 125W TF 0 100 16 08480 RESISTOR 26 1K 1 125W TF TC 0 100 7 8480 RESISTOR 12 1K 1 125W TF 0 100 14 15 28480 RESISTOR 20 5K 1 125W TF TC 0 100 16 28480 RESISTOR 17 8K 4 12 125W TF TC 0 100 7 RESISTOR 21 5 1 125W TF TC 0 100 j4 15 28480 RESISTOR 56 2 1 125W TF 0 100 28480 RESISTOR 147K 4 12 125W TF TC 0 100 14 28480 RESISTOR 422K 1 125W TF TC 0 100 08480 RESISTOR 681K 1 125W TF TC 0 100 28480 RESISTOR 1M 1 125W TF TC 0 100 RESISTOR 19 6K 1 125W TF TC 0 100 ALL 128480 RESISTOR 26 1K 1 125W TF TC 0 100 14 15 128480 RESISTOR 68 1K 1 125W TF TC 0 100 16 17 28480 RESISTOR 7 5K 1 125W TF TC 0 100 TF TC 0 100 ALL Ree Nn RESISTOR TRMR 10K 10 TKF TOP ADJ 25 T 3296Y 1 103 2997 RESISTOR 261K 1 125W TF 1C 0 100 RESISTOR 100K 1 125W TF TC 0 100 15 RESISTOR 31 6K 1 125 TF TC 0 100 mu 0 Mfr P N Mfr Code i po po p fro 5 3 fn BJ se w po 7 se L p po p f r ALL po m je Table A 10 Replace
43. ATTERY CHARGING Sark eden eco gue bka IS 1 14 GENERAL INFORMATION INTRODUCTION This manual describes all models in the Agilent E361xA 60W Bench Power Supply family and unless stated otherwise the information in this manual applies to all models SAFETY REQUIREMENTS This product is a Safety Class instrument which means that it is provided with a protective earth ground terminal This terminal must be connected to an ac source that has a 3 wire ground receptacle Review the instrument rear panel and this manual for safety markings and instructions before operating the instrument Refer to the Safety Summary page at the beginning of this manual for a summary of general safety information Specific safety information is located at the appropriate places in this manual This power supply is designed to comply with the following safety and EMC Electromagnetic Compatibility requirements 348 Safety Requirements for Electronic Measuring Apparatus WIEC 1010 1 EN 61010 Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use WCSA C22 2 No 231 Safety Requirements for Electrical and Electronic Measuring and Test Equipment WUL 1244 Electrical and Electronic Measuring and Testing Equipment WEMC Directive 89 336 EEC Council Directive entitled Approximation of the Laws of the Member States relating to Electromagnetic Compatibility WEN 55011 1991 Gr
44. D ON CONTRACT TORT OR ANY OTHER LEGAL THEORY ASSISTANCE The above statements apply only to the standard product warranty Warranty options extended support contacts product maintenance agreements and customer assistance agreements are also available Contact your nearest Agilent Technolo gies Sales and Service office for further information on Agilent s full line of Support Programs DECLARATION OF CONFORMITY According to ISO IEC Guide 22 and CEN CENELEC EN 45014 Manufacturer s Name and Addresss Responsible Party Alternate Manufacturing Site Agilent Technologies Inc Agilent Technologies Malaysia Sdn Bhd 550 Clark Drive Suite 101 Malaysia Manufacturing Budd Lake New Jersey 07828 Bayan Lepas Free Industrial Zone PH III USA 11900 Penang Malaysia Declares under sole responsibility that the product as originally delivered Product Name a Single Output dc Power Supply dual range b Single Output dc Power Supply single range Single Output System Power Supply d Multiple Output dc Power Supply e Multiple Output System dc Power Supply Model Number a E3610A E3611A E3612A b E3614A E3615A E3616A E3617A c E3632A d E3620A E3630A e E3631A Product Options This declaration covers all options of the above product s Complies with the essential requirements of the Low Voltage Directive 73 23 EEC and the EMC Directive 89 336 EEC including 93 68 EEC and carries the CE Marking accordingly EMC Information ISM
45. E Agilent Technologies Agilent E361xA 60W BENCH SERIES DC POWER SUPPLIES OPERATING AND SERVICE MANUAL FOR MODELS Agilent E3614A Agilent E3615A Agilent E3616A Agilent E3617A Manual Part No 5959 5310 April 2000 Edition 8 SAFETY SUMMARY The following general safety precautions must be observed during all phases of operation service and repair of this instrument Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the instrument Agilent Technologies assumes no liability for the customer s failure to comply with these requirements BEFORE APPLYING POWER Verify that the product is set to match the available line voltage and that the correct fuse is installed GROUND THE INSTRUMENT This product is a Safety Class instrument provided with a pro tective earth terminal To minimize shock hazard the instrument chassis and cabinet must be connected to an electrical ground The instrument must be connected to the ac power supply mains through a three conductor power cable with the third wire firmly connected to an electrical ground safety ground at the power outlet Any interruption of the protective grounding conductor or disconnection of the protective earth terminal will cause a poten tial shock hazard that could result in personal injury If the instru ment is to be energized via an external autotransformer for v
46. E3615A E3616A E3617A E3614 60005 E3615 60005 E3616 60005 E3617 60005 0371 3806 0371 8624 E361X 60003 E361X 60009 2100 4503 E3631 20011 E3631 20012 E3631 20013 2950 0144 5041 8621 E3614 60002 E3615 60002 E3617 60002 E3617 60002 5021 8128 5021 8139 0160 4835 0180 4360 0180 4355 0180 4452 0180 3595 0160 0269 0180 3990 0180 4567 0180 4568 0180 4607 0180 4566 0180 3970 0160 7449 0160 4832 0160 4835 0160 4832 Table A 10 Replaceable Parts List Description Mfr Code 60W BENCH POWER SUPPLY E3614A MODEL 60W BENCH POWER SUPPLY E3615A MODEL 60W BENCH POWER SUPPLY E3616A MODEL 60W BENCH POWER SUPPLY E3617A MODEL MAIN BODY ASSY MAIN BODY ASSY MAIN BODY ASSY MAIN BODY ASSY KEY CAP WHT KEY CAP GRAY FRONT PANEL ASSY DISPLAY BOARD ASSY RES VAR 10K 5 10 TURN WW BINDING POST RED BINDING POST BLACK BINDING POST GREEN NUT BINDING POST KNOB MAIN BOARD ASSY MAIN BOARD ASSY MAIN BOARD ASSY MAIN BOARD ASSY PCB MAIN FOR E3614A E3615A PCB MAIN FOR E3616A E3617A CAP FXD 1UF 10 50V CER X7R CAP FXD 1000UF 25V 20 AL ELECTLT CAP FXD 470UF 50V 20 AL ELECTLT CAP FXD 330UF 63V 20 AL ELECTLT CAP FXD 220UF 100V 20 AL ELECTLT CAP FXD 0 1UF 20 500V CER Z5U CAP FXD 4700UF 20 25V AL ELECTLT CAP FXD 39000UF 25V 20 AL ELECTLT CAP FXD 12000UF 63V 20 AL ELECTLT CAP FXD 5600UF 100V 20 AL ELECTLT CAP FXD 2700UF 160V 20 AL ELECTLT CAP FXD 1UF 4 202 50V AL ELECTLT
47. IONS bh 24 Pee DA oh Bed b de 1 5 INSTALLATION zi Sitio aire eG Oe beer Diei 1 6 INITIAL 4 1 6 Mechanical Check u ee endt i 1 6 Electrical Check xime Se eeu FE Se a ee ea eee aus 1 6 INSTALLA HON DATA ele eir p epe eee ee qr eor t 1 6 Location and Cooling 1 2 1 6 Outline Diagram va ves S sekser die seh e de a 1 6 Rack Mounting 1 6 INPUT POWER REQUIREMENTS 1 1 4 2 1 6 Line Voltage Option 1 6 Power Gord sce ook ses Lone ene a Chu hee EIS RUE ut Le 1 7 OPERATING INSTRUCTIONS 1 7 INTRODUC TION zem 1 GE wie id bee PENG el 1 7 TURN ON CHECKOUT 1 7 OPERATING MODES a v lige eg 5 1 8 LOCAL OPERATING 2 da e euer x qu eux RIS X tad dra 1 8 Constant Voltage 1 7 1 8 Constant Current Operation 2
48. NEG 11 5 12 5V 70 220 C OP AMP GP DUAL 8 PIN DIP P C GATE TTL LS NAND QUAD 2 INP SOLATOR LED TRIAC I F 100MA MAX MOSFET N CHAN E MODE TO 247 MOSFET N CHAN E MODE 70 3 SI OR NP 2222A SI 18 PD 500MW TOR N 2222A SI 70 18 PD 500MW OR PNP 2N2907A SI TO 18 PD 400MW OR PNP SI TO 39 PD 1W FT 60MHZ R RECT 100V 6A 35 E 936 BR 00V 1A LL 936 EN PRP 180V 200MA D0 35 27014 R RECT 400V 1A 50NS 00 41 LL UF4004 936 R SCR 0 220 VRRM 200V LL MCR264 4 04713 R RECT 400V 1A 50NS 00 41 15 UF40 936 BRIDGE 600V 6A L GBU8J 936 T 15317 gt A fe gt pa j o RI 826 1075 826 0468 826 0393 826 0221 826 0346 820 1197 22 23 24 990 1659 4 855 0989 855 0536 2 3 10 11 854 0477 8 854 0477 4 853 0281 853 0041 R1 19 1273 6 0284 R3 4 5 6 7 0033 R8 9 16 17 31 32 1149 R10 12 15 18 20 884 0332 R11 14 901 1149 R13 906 0400 gt L F442CN 270 seme pum gt gt gt cT Bl gt r wo gt r 2 O O OF OFT mv T1 4 n j gt gt gt 9 N DO R LEN 2N2222A 04713 5 2N2222A 04713 7 2N2907A 04713 MM5007 04713 4 4 gt n gt 72 gt oa ope fe o N c I
49. OG AL APP 4700r SOV 0 S fin FXD 0 1UF 20 250V PPR MET ALL 2848 4700PF 20 250V CER X5V ALL 2848 FXD LUF 10 250V POLYP MET 16 17 28480 FXD 470PF 5 100V 2848 eo oj 0160 0301 0811 3478 0811 3839 0811 3864 0811 3861 RESISTOR CER COG 0 012UF 4 102 200V PE FL RESISTOR 0 1 1 5W PW RESISTOR 0 2 1 PW RESISTOR 0 6 5 SW PW 78 1 5W P TC 0 90 TC 0 90 TC 0 90 N TC 0 90 prp p mp pe m po ojl Of 0698 3160 RESISTOR 31 6K 1 125W TF TC 0 100 ALL R3 7 21 22 105 106 2848 2848 0757 0465 0757 0401 0757 0280 0761 0021 0699 2715 0811 1806 0811 2188 0764 0007 0699 3105 0757 0461 RESISTO RESISTO OOK 1 125W TF IC 0 100 00 1 125W TF TC 0 100 848 RESISTOR 1K 1 125W TF TC 0 100 14 15 2848 RESISTOR 1K 5 1W TF TC 0 100 61 2848 RESISTOR FUSE 10HM 5 0 5W Q70 ALL 28480 RESISTOR 2K 5 3W PWI 20PPM mir 2848 RESISTOR 5K 5 3W PWI 20PPM H5 2848 RESISTOR 27K 5 2W MO TC 0 200PPM H6 x 2848 RESTSTOR TSK S ZW WO TC soU qu RSISURGRIKe E TOSUTE A fin N ojl of of of oj R14 48 52 R17 18 66 78 110 123 R19 113 R20 23 0698 3157 0757 0442 0757 0465 0757 0280 0698 0757 0083 0463 RESISTOR 19 6K 1 125W TF TC 0 100 14 15 RESISTOR 10K 1 125W TF IC 0 100
50. Rs TERMINAL OF 9 POWER SUPPLY LOAD TERMINALS TO POSITIVE TERMINAL OF POWER SUPPLY Table A 1 Test Equipment Required TYPE REQUIRED CHARACTERISTICS USE RECOMMENDED MODEL Oscilloscope Sensitivity 1 mV PT Agilent 54600A Bandwidth 20 MHz 100 MHz Input Differential 50 ohm and 100 ohm RMS Voltmeter True rms 20 MHz bandwidth P Sensitivity 1 mV Accuracy 596 Multimeter Resolution 100 nV P A T Agilent 34401A Accuracy 0 0035 Electronic Load Voltage Range 240 Vdc P Agilent 6063A Current Range 10 Adc Open and short switches Transient on off Load Resistor 1 3 ohm 60 W 6 6 ohm 60 W 20 5 ohm 60 W P 60 ohm 60 W Current Monitoring 0 1 ohm 0 1 10 W 1 ohm 1 5 W P A Sampling Resistor Rs Variable Voltage Range 85 130 and 200 260 Volts P T Auto Transformer P Performance testing A Calibration adjustments T Troubleshooting A 3 CONSTANT VOLTAGE CV TESTS CV Setup For all CV tests set the output current at full rated output to assure CV operation The onset of constant current can cause a drop in output voltage increased ripple and other performance changes not properly ascribed to the con stant voltage operation of the supply Load Regulation Load Effect Definition CV Load regulation is the change in the steady state value of dc output voltage due to a change in load resis tance from open circuit to full load or from full load to
51. TOR 1K 5 3W P 00 I TC 0 20 RESISTOR 2 6K 5 3 RESISTOR 105K 1 125W TF 04 RESISTOR 475K 1 125W TF 04 RESISTOR 562K 1 125W TF TC 0 100 ALL 8480 0 1 RESISTOR 49 9K 1 125W TF TC 0 RESISTOR 7 32 I TF TC 0 F TC 0 F TC 0 F TC 0 TC 0 100 F TC 0 F TC 0 F TC 0 100 1 TF TC 0 TF TC 0 RESISTOR 6 81 TF TC 0 RESISTOR 8 06 z TF TC 0 RESISTOR 33 2 TF TC 0 RESISTOR 66 5 TF TC 0 21K 1 125W TF IC 0 100 RESISTOR 10 1 125W TF TC 0 100 14 15 125W TF TC 0 100 125W TF TC 0 100 0 1 25W TF TC 0 100 125W TF TC 0 100 TF TC 0 100 N TC 0 90 N TC 0 90 N TC 0 90 N TC 0 90 PWI TC 0 20 RESISTOR 1 52K 5 3W PWI TC 0 20 PWI TC 0 20 RESISTOR 2 61K 1 125W TF TC 0 100 ALL 2848 RESISTOR 42 2K 1 125W TF TC 0 100 Mfr PIN Mfr Code 2848 00 2848 LI Ls om qu pee p pes x ja fen o of of olol CO OC x pe 0 om pe fen 2848 2848 ojl 2848 2848 pp p m po m po m po ojl Of of olol COC fen m po m Fe 100 100 Reference Designator epe DD Sj Oly Gy PETE RR ER D R70 R70 R70 R70 72 R72 R72 R72 R74 75 R74 75 R74 75 R77 R77 R79 79 R79 R79 R81 122 R83 119
52. able Parts List Cont d Agilent Part Description Number Code 757 0463 RESISTO TF TC 0 100 5 88480 757 04 F 15 125WT 6 284 757 04 K 1 125W TFT 1 28480 0698 44 F 15 125WT H4 28480 698 3 38 3K 1 125W TF T 15 6 28480 0698 44 TOR 35 7K 1 125W TF T 28480 0698 8812 1 RES OR 1 1 125W TF TC 0 100 Hun 28480 0698 8825 1 RES R 681K 1 125W TF TC 0 100 16 17 28 480 0757 0401 TOR 100 1 125W TF TC 0 100 L 28480 826 0144 C V RGLTR FXD P0S 4 8 5 2V 70 220 PKG L 826 0346 C GP DUAL 8 PIN DIP P 15 LM358N 270 826 0412 C COMPARATOR PRCN DUAL 8 PIN DIP P L 270 826 0138 C GP QUAD 14 PIN DIP P L LM339 270 Reference Designator N zem T T T T T C nn nT nn 1 1 1 d wa aA AI AY I DB oF gt p co 4 N N li r gt r3 gt 3 16 20 Co I c gt I 826 0665 C LOW BIAS H IMPD QUAD 14 PIN L LF347BN 270 826 1297 C V RGLTR V REF FXD 4 8 5 2V T0 92 PKG L 336BZ 5 0 990 1659 OPTO ISOLATOR LED TRIAC IF 100MA MAX L CP3020Z 826 1702 C OP AMP PRCN 8 PIN DIP P C OP AMP GP DUAL 8 PIN DIP P L C V RGLTR OV V SEN 2 3 37 8V 8 DIP P C V RGLTR ADJ POS 1 2 37V 70 220 PKG C V RGLTR FXD
53. al supplies Each of the individual supplies must be adjusted in order to obtain the total output voltage Figure 11 shows the rear panel switch settings and terminal connections for normal series operation of two supplies POWER SUPPLY LOCAL de oru rs AIA ln MS IMSE ONS 2500 SENSE 5 oul 5 CC VREFAi A2 A4 A5 L SLAVE 1 L _____ REMOTE LOAD POWER SUPPLY MASTER LOCAL Rr aS HHHH H HH MS1 MS2 cv SENSE T CC VREFAi A2 4 AS te SLAVE sd Lu REMOTE AA EZ Figure 11 Normal Series Operation of Two Supplies AUTO SERIES OPERATION Auto series operation permits equal or proportional voltage sharing and allows control of output voltage from one master unit The voltage of the slaves is determined by the setting of the front panel VOLTAGE control on the master and voltage divider resistor The master unit must be the most positive sup ply of the series The output CURRENT controls of all series units are operative and the current limit is equal to the lowest setting If any output CURRENT controls are set to
54. ance Table 1 Specifications and Operating Characteristics AC INPUT An internal switch permits operation from 100 115 or 230 Vac lines 100 Vac 10 47 63 Hz 163 VA 125 W 115 Vac 10 47 63 Hz 163 VA 125 W 230 Vac 10 47 63 Hz 163 125 W DC OUTPUT Voltage and current can be programmed via front panel control or remote analog control over the following ranges E3614A 0 8V 0 6A E3615A 0 20V 0 3A E3616A 0 35V 0 1 7A 617 0 60 0 1 OUTPUT TERMINALS The output terminals are provided on the front and rear panel They are isolated from the chassis and either the positive or neg ative terminal may be connected to the ground terminal LOAD REGULATION Constant Voltage Less than 0 01 plus 2 mV for a full load to no load change in output current Constant Current Less than 0 0196 plus 250 HA for a zero to maximum change in output voltage LINE REGULATION Constant Voltage Less than 0 01 plus 2 mV for any line volt age change within the input rating Constant Current Less than 0 01 plus 250 uA for any line volt age change within the input rating PARD Ripple and Noise Constant Voltage Less than 200 uV rms and 1 mV p p 20 Hz 20 MHz E3614A Less than 5 mA rms E3615A Less than 2 mA rms E3616A Less than 500 rms E3617A Less than 500 pA rms Constant Current OPERATING TEMPERATURE RANGE 0 to 409 for full rated output Maximum current is derated 1 per degree
55. andwidth to 20 MHz e Checkthat the peak to peak noise is less than 1 mV POWER SUPPLY p LOCAL UNDER TEST N S 1 MIS 2 L SLAVE EB DIFFERENTIAL pt OSCILLOSCOPE Model R E3614A 1 3 ohm 60W E3615A 6 6 ohm 60W E3616A 20 5 ohm 6OW E3617A 60 ohm GOW Figure A 7 CV PARD Peak to Peak Measurement Test Setup CV Drift Stability Definition The change in output voltage dc to 20 Hz for the first 8 hours following a 30 minute warm up period with con stant input line voltage constant load resistance and constant ambient temperature Test Parameter Measured Variable Output Voltage Expected Results Less than 0 196 plus 5 mV Test Procedure a Connect the DVM across Rs in Figure A 4 b Operate the electronic load in constant current mode and set its current to the full rated value of power sup ply c Turn the supply s power on and turn CURRENT con trol fully clockwise d Turn up output voltage to the full rated value as read on the digital voltmeter e After a 30 minute warm up note the voltage on DVM f The output voltage reading should deviate less than 0 196 plus 5 mV from the reading obtained in step e over a period of 8 hours A 6 CONSTANT CURRENT CC TESTS CC Setup Constant current tests are analogous to constant voltage tests with the supply s output short circuited and the voltage set to
56. ant voltage operation and only deliver that fraction of its rated output current which is necessary to fulfill the total load demand Figure 8 shows the rear panel switch settings and terminal con nections for normal parallel operation of two supplies POWER SUPPLY MASTER fost s A gm MS1 MS2 CV SENSE te SLAVE L REMOTE S S CC VREFA1 A2 4 A5 POWER SUPPLY MASTER LOCAL gam VA er IHHHHHHHHIH MS1 52 cc SENSE te SLAVE L REMOTE CC VREFA1 A2 4 AS Figure 8 Normal Parallel Operation of Two Supplies AUTO PARALLEL OPERATION Auto parallel operation permits equal current sharing under all load conditions and allows complete control of output current from one master supply The control unit is called the master the controlled units are called slaves Normally only supplies having the same model number should be connected for auto parallel operation since the supplies must have the same voltage drop across the cur rent monitoring resistor at full c
57. ating modes are remote voltage sensing and remote programming of output voltage and current using external voltages LOCAL OPERATING MODE The power supply is shipped from the factory configured in the local operating mode Local operating mode requires the switch settings of the rear panel as shown in Figure 4 The power sup ply provides constant voltage CV or constant current CC output Constant Voltage Operaton To set up a power supply for constant voltage operation proceed as follows Turn on the power supply and adjust 10 turn VOLTAGE con trol for desired output voltage output terminals open b While depressing DISPLAY OVP CC SET switch adjust 10 turn CURRENT control for the desired current limit c With power off connect the load to the output terminals d Turn on the power supply Verify that CV LED is lighted During actual operation if a load change causes the current limit to be exceeded the power supply will automatically cross over to constant current mode and the output voltage will drop proportionately Constant Current Operation To set up a power supply for constant current operation proceed as follows a Turn on power supply b While depressing DISPLAY OVP CC SET switch adjust CURRENT control for the desired output current Turn up the VOLTAGE control to the desired voltage limit With power off connect the load to the output terminal e Turn on power supply and then verify that CC LED is
58. d resistance and constant ambient temperature Test Parameter Measured Variable Output Current Expected Results Less than 0 1 plus 10 mA Test Procedure a Connect the DVM across Rs in Figure A 4 Operate the electronic load in constant voltage mode and set its voltage to the full rated value of the power supply b Turn the supply s power on and turn VOLTAGE con trol fully clockwise c Turn up output current to the full rated value d After a 30 minute warm up note the voltage on DVM and convert it to current by dividing this voltage by Rs e The converted output current should deviate less than 0 1 plus 10 mA from the current obtained in step d over a period of 8 hours ADJUSTMENT AND CALIBRATION PROCEDURE Adjustment and calibration may be required after perfor mance testing troubleshooting or repair and replacement Perform those adjustments that affect the operation of the faulty circuit and no others To remove the top cover refer to Line Voltage Option Conversion paragraph WARNING Maintenance described herein is performed with power supplied to the supply and protective covers removed Such maintenance should be performed only service trained personnel who are aware of the hazards involved for example fire and electrical shock Where maintenance can be performed with out power applied the power should be removed POWER SUPPLY UNDER TEST M S 1 MIS 2 SENSE L
59. dition exists Notice that troubleshooting can proceed directly as described in Table A 4 whenever a high output voltage condition exists 1 Tum on the power supply with full load connected and increase output voltage by turning up the front panel voltage control The output voltage is clamped and CV indicator is turned off at some output voltage below full rated output voltage If this is the case the series regulator feedback loop is operating normally and the trouble condition is probably due to a defect in the preregulator feedback loop refer to Table A 6 If the output voltage remains in low stage and varying the front panel voltage control has little or no effect then the trouble is probably in the series regulator feedback loop Refer to Table A 5 2 Measure the voltage between TP2 and TP1 shown on the schematic diagram at the rear of the manual with full load with oscilloscope while increasing the output voltage from 0 to full rated voltage The volt age measured has step changes three times during 0 to full output voltage swing If this is the case prereg ulator feedback loop is operating normally If this is not the case the trouble is probably in the preregula tor feedback loop Refer to Table A 6 After the trouble has been isolated to one of the feedback loops troubleshooting can proceed as described in Tables A 4 A 5 or A 6 Series Regulating Feedback Loop When troubleshooting the series regulating loop it
60. external voltage source such as a battery is connected across the output and OVP inadvertently triggered the SCR will continuously sink a large current from the source possibly damaging the supply To avoid this a diode must be connected in series with the output as shown in Figure 17 POWER SUPPLY BATTERY NOTE If remote sensing connect Sense lead to Anode side of diode Figure 17 Recommended Protection Circuit for Battery Charging SERVICE INFORMATION DISPLAY POWER SUPPLY REFERENCE AND BIAS SUPPLY RECTIFIER FILTER PREREGULATOR SERIES REGULATOR PREREGULATOR CONTROL CIRCUIT CVICC INDICATOR CIRCUIT DENOTES CONSTANT CURRENT FEEDBACK PATH DENOTES CONSTANT VOLTAGE FEEDBACK PATH CURRENT DISPLAY CIRCUIT VOLTAGE DISPLAY CIRCUIT CONSTANT CURRENT ERROR AMP CC SET CIRCUIT OVP SET CIRCUIT INPUT CIRCUIT CONSTANT VOLTAGE ERROR AMP Figure A 1 Block Diagram PRINCIPLES OF OPERATION Block Diagram Overview Throughout this discussion refer to both the block diagram of Figure A 1 and the schematic diagrams at the rear of the manual The input ac line voltage is first applied to the prereg ulator which operates in conjunction with the SCR control cir cuit preregulator control circuit to rectify the tap switched AC voltage This preregulator minimizes the power dissipated in the series regulating elements by controlling the dc level across the input f
61. ge Common to the Minus Output 2 Programming Voltage output Power Supply Ab pe output Figure 2 Set the CV switch down on the rear panel and all others up Vin VA x Vout Vout X Vin Where Vout 18 the power supply output voltage Vin is the programming voltage A is the gain factor and the values of each model are as below Model A 1 A E3614A 0 44 2 25 E3515A 0 67 1 5 E3616A 0 78 1 29 E3617A 0 86 1 17 Alternative Voltage Programming Using Resistors Programming Voltage Common to the Plus Output R1 Programming Voltage output Power Supply output Figure 3 M S2 switch must be in the down position For best results place a 0 1uF capacitor in parallel with R2 Vin RI R2 x Vout Vout R2 R1 x Vin Where Vout is the power supply output voltage Vin is the programming voltage and R2 should be in the to 100KQ range 1 10 2 Programming Voltage Common to the Minus Output AN A3 Programming Voltage P output Power Supply output Figure 4 The output will always be the same or less than the programming voltage The M S2 switch must be in the down position For best results place a 0 I UF capacitor in parallel with R2 Vin RIF R2 R2 x Vout Vout R2 RI R2 x Vin Where V Vin is the programming voltage ut S the po
62. he constant voltage current error amplifier circuits for comparison purpose The display circuit provides an indication of output voltage and current for con stant voltage or constant current operating modes An operator error or a component failure within the regulating feedback loop can drive a power supply s output voltage to many times its preset value The overvoltage protection cir cuit is to protect the load against this possibility The circuit insures that the power supply voltage across the load will never exceed a preset limit Diode CR19 is connected across the output terminals in reverse polarity It protects the output electrolytic capacitor and the series regulator transistors from the effects of a reverse voltage applied across the output terminals The display power circuit provides voltage which is used by A D converter and LED drive MAINTENANCE INTRODUCTION This section provides performance test and calibration proce dures and troubleshooting information The following opera tion verification tests comprise a short procedure to verify that the power supply is performing properly without testing all specified parameters If a fault is detected in the power supply while making the performance check or during normal operation proceed to the troubleshooting procedures After troubleshooting per form any necessary adjustments and calibrations Before returning the power supply to normal operation repeat the perf
63. he correct phase and amplitude to counteract the change in output voltage or current Two error amplifiers are included in a CV CC supply one for controlling output voltage the other for controlling output cur rent Since the constant voltage amplifier tends to achieve zero output impedance and alters the output current when ever the load resistance changes while the constant current amplifier causes the output impedance to be infinite and changes the output voltage in response to any load resis tance change it is obvious that the two amplifiers can not operate simultaneously For any given value of load resis tance the power supply must act either as a constant voltage Source or as a constant current source it can not be both transfer between these two modes is accomplished at a value of load resistance equal to the ratio of the output voltage con trol setting to the output current control setting A 2 Full protection against any overload condition is inherent in the Constant Voltage Constant Current design principle since there is not any load condition that can cause an output which lies outside the operating region For either constant voltage or constant current operation the proper choice of front panel voltage and current control settings insures optimum pro tection for the load device as well as full protection for the power supply The reference and bias circuit provides stable reference volt ages which are used by t
64. he current limiting circuit A high current pulse may damage load components before the average output current is large enough to cause the current limit ing circuit to operate The effect of the output capacitor during constant current opera tion are as follows a The output impedance of the power supply decreases with increasing frequency b The recovery time of the output voltage is longer for load resistance changes c A large surge current causing a high power dissipation in the load occurs when the load resistance is reduced rapidly REVERSE VOLTAGE LOADING A diode is connected across the output terminals with reverse polarity This diode protects the output electrolytic capacitors and the series regulator transistors from the effects of a reverse volt age applied across the output terminals For example in series operation of two supplies if the AC is removed from one supply the diode prevents damage to the unenergized supply which would otherwise result from a reverse polarity voltage Since series regulator transistors cannot withstand reverse volt age another diode is connected across the series transistor This diode protects the series regulators in parallel or auto parallel operation if one supply of the parallel combination is turned on before the other BATTERY CHARGING The power supply s OVP circuit contains a crowbar SCR which effectively shorts the output of the supply whenever the OVP trips If an
65. he output characteristic to be mapped into four operating regions Figure A 2 The boundary lines which are invisible to the user are divided into four operating regions V1 V2 V3 and V4 to minimize the power dissipation in the Series pass transistors Whenever the output voltage is below the sloping V1 line the control circuit inhibits four SCRs and the input capacitors charge to a voltage determined by 1 Figure A 2 indicates the windings that are connected as a result of the other voltage decisions CR15 CR18 CR12 ON CR13 IMAX lour Figure A 2 Output Power Plot The series regulators Q1 and Q4 are part of a feedback loop which consists of the driver and the Constant Voltage Con stant Current error amplifier The series regulator feedback loop provides fine and fast regulation of the output while the preregulator feedback loop handles large relatively slow reg ulation demands The regulator is made to alter its conduction to maintain a constant output voltage or current The voltage developed across the current sampling resistors R58 and R59 is the input to the constant current error amplifier The constant volt age error amplifier obtains its input by sampling the output voltage of the supply Any changes in output voltage or current are detected and amplified by the constant voltage or constant current error cir cuit and applied to the series regulator in t
66. he pickup of exter nal noise and run them parallel and close to the load leads In noisy environments it may be necessary to shield the sense leads Ground the shield at the power supply end only Do not use the shield as one of the sensing conductors Stability When the supply is connected for remote sensing it is possible for the impedance of the load wires and the capacitance of the load to form a filter which will become part of the supply s CV feedback loop The extra phase shift created by this filter can degrade the supply s stability and can result in poor transient response performance or loop stability In extreme cases it can cause oscillations Keep the leads as short as possible and twist the leads of the load to eliminate the load lead inductance and keep the load capacitance as small as possible The load leads should be of the largest diameter practical heavy enough to limit the voltage drop in each lead to 0 5 volts The sense leads are part of the supply s programming feedback control loop Accidental open connections of sense or load leads during remote sensing operation have various unwanted effects Provide secure permanent connections especially for the sense leads S ov OC VAR B NOTE Twist sense leads and load lead
67. he power supply will automatically cross over from constant voltage to constant current operation in response to an increase over the preset limit in the output current Although the preset limit may be set higher than the average output current high peak currents as occur in pulse loading may exceed the preset cur rent limit and cause cross over to occur If this cross over limiting is not desired set the preset limit for the peak requirement and not the average REVERSE CURRENT LOADING An active load connected to the power supply may actually deliver a reverse current to the power supply during a portion of its operating cycle An external source can not be allowed to pump current into the supply without loss of regulation and possi ble damage to the output capacitor of the power supply To avoid these effects it is necessary to preload the supply with a dummy load resistor so that the power supply delivers current through the entire operating cycle of the load devices ACTIVE LOAD DEVICE POWER SUPPLY CURRENT FLOW DURING ty CURRENT FLOW DURING ta Figure 16 Reverse Current Loading Solution OUTPUT CAPACITANCE An internal capacitor connected across the output terminals of the power supply helps to supply high current pulses of short duration during constant voltage operation Any capacitance added externally will improve the pulse current capability but will decrease the safety provided by t
68. hus controlling the slave s output The master sup ply in an auto tracking operation must be the positive supply hav ing the largest output voltage Turn up and turn down of the power supplies are controlled by the master supply In order to maintain the temperature coefficient and stability specifications of the power supply the external resistor should be stable low noise low temperature Determining Resistors External resistors control the fraction of the master unit s voltage that is supplied from the slave unit For two units in auto tracking the ratio R1 and R2 is R2 R1 R2 Vs Vm Where Vm master output voltage Vs slave output voltage NOTE It is recommended to connect a 0 1 uF capacitor in paral lel with R2 in two supplies operation or R2 and R4 in three supplies operation to ensure the stable operation Setting Voltage and Current Use the master unit s VOLTAGE con trol to set the output voltage from both units When the master is in CV operation the master s output voltage Vm is the same as its voltage setting and the slave s output voltage for two units operation is Vm R2 R1 R2 The VOLTAGE control of the slave unit is dis abled Set the CURRENT controls of master and slave units above the required currents to assure CV operation of master and slave units Overvoltage Protection Set the OVP shutdown voltage in each unit so that it shuts down at a voltage higher than its output volt age during auto tracking
69. i nals For this case remote sensing should be used See para graph Remote Voltage Sensing OPERATION BEYOND RATED OUTPUT The output controls can adjust the voltage or current to values up to 5 over the rated output Although the supply can be operated in the 5 overrange region without being damaged it can not be guaranteed to meet all of its performance specifications in this region REMOTE OPERATING MODES Remote operating modes discussed below are remote voltage sensing and remote voltage programming You can set up the unit for remote operating modes by changing the settings of the rear panel switch and connecting the leads from the rear panel termi nals to the load or the external voltage Solid conductors of 0 75 to 1 5 mm can be connected to the rear panel terminals by sim ply push fitting Thinner wires or conductors are inserted into the connection space after depressing the orange opening lever CAUTION Turn off the supply while making changes to rear panel switch settings or connections This avoids the possibility of damage to the load and OVP shutdown from unin tended output Remote Voltage Sensing Remote voltage sensing is used to maintain good regulation at the load and reduce the degradation of regulation that would occur due to the voltage drop in the leads between the power supply and the load By connecting the supply for remote voltage sensing voltage is sensed at the load rather than at the supply s
70. ilter capacitor depending on the output volt age To achieve this tap switching is accomplished by four SCRs and one bridge diode CR10 CR12 CR15 CR18 and CR13 and the SCR control circuit By selecting different SCR firing combinations from SCR control circuit these circuits allow the input capacitors C7 and C8 to charge to one of four discrete voltage levels depending on the output voltage required A 1 The main secondary winding of the power transformer has three sections N1 N2 and N3 each of which has a different turns ratio with respect to the primary winding At the begin ning of each half cycle of the input ac the control circuit determines whether one pair both or none of the SCR will be fired If neither SCR is fired the bridge diode CR13 receives an ac input voltage that is determined by N1 turns and the input capacitors charge to a corresponding level If SCR CR15 and CR18 are fired input capacitors charge to the volt age determined by N1 N2 turns Similarly if CR10 and CR12 are fired the capacitors are charged by N1 N3 Finally if all SCRs are fired simultaneously input capacitors charge to its highest voltage level determined by N1 N2 N3 turns The SCR control circuit determines which SCRs are to be fired by monitoring the output voltage and comparing these values against a set of three internally derived reference lev els These three reference levels are translated into boundary lines to allow t
71. international prices defined as destination local currency price or U S or Geneva Export price If Agilent is unable within a reasonable time to repair or replace any product to condition as warranted the Customer shall be entitled to a refund of the purchase price upon return of the product to Agilent The warranty period begins on the date of delivery or on the date of installation if installed by Agilent LIMITATION OF WARRANTY The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Customer Cus tomer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifica tions for the product or improper site preparation and maintenance TO THE EXTENT ALLOWED BY LOCAL LAW NO OTHER WARRANTY IS EXPRESSED OR IMPLIED AND AGILENT SPECIFICALLY DISCLAIMS THE IMPLIED WARRAN TIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE For consumer transactions in Australia and New Zealand The warranty terms contained in this statement except to the extent lawfully permitted do not exclude restrict or modify and are in addition to the mandatory rights applicable to the sale of this product to you EXCLUSIVE REMEDIES TO THE EXTENT ALLOWED BY LOCAL LAW THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER S SOLE AND EXCLUSIVE REMEDIES AGILENT SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASE
72. l the inspection is completed If damage is found a claim should be filed with the carrier The Agilent Technologies Sales and Service office should be notified Mechanical Check This check should confirm that there are no broken knobs or connec tors that the cabinet and panel surfaces are free of dents and scratches and that the meter is not scratched or cracked Electrical Check The instrument should be checked against its electrical specifi cations Paragraph TURN ON CHECKOUT PROCEDURE con tains a brief checkout procedure and PERFORMANCE TEST in section SERVICE INFORMATION includes an instrument perfor mance check to verify proper instrument operation INSTALLATION DATA The instrument is shipped ready for bench operation It is neces sary only to connect the instrument to a source of power and it is ready for operation Location and Cooling This instrument is air cooled Sufficient space should be allowed so that a free flow of cooling air can reach the sides and rear of the instrument when it is in operation It should be used in an area where the ambient temperature does not exceed 40 C Maximum current is derated 1 per C at 40 C 55 C Outline Diagram Figure 1 is a outline diagram showing the dimensions of the instrument Rack Mounting This instrument may be rack mounted in a standard 19 inch rack panel either by itself or alongside a similar unit Please see ACCESSORY page 1 4 for available rack mounting
73. lighted If CV LED is lighted choose a higher voltage limit A voltage setting that is greater than the current setting multiplied by the load resistance in ohms is required for CC operation During actual operation if a load change causes the voltage limit to be exceeded the power supply will automatically cross over to constant voltage operation at the preset voltage limit and output current will drop proportionately Overvoltage Protection OVP Adjustable overvoltage protection guards your load against over voltage When the voltage at the output terminals increases or is increased by an external source to the OVP shutdown voltage as set by the OVP ADJUST control the supply s OVP circuit dis ables the output causing the output voltage and current to drop to zero During OVP shutdown the OVP LED lights 1 8 False OVP shutdowns may occur if you set the OVP shutdown too close to the supply s operating voltage Set the OVP shut down voltage 4 of output 42 0 V or more above the output volt age to avoid false shutdowns from load induced transients Adjusting OVP Follow this procedure to adjust the OVP shut down voltage a With the VOLTAGE control fully counter clockwise turn on the power supply b While depressing DISPLAY OVP CC SET switch adjust the OVP Adjust control to the desired OVP shutdown using a small flat blade screwdriver c Follow the procedure for CC or CV operaton to set the out put voltage and
74. ly plus the resistance of the leads between its output terminals and the point of connection Use separate leads to all measuring devices to avoid the sub tle mutual coupling effects that may occur between measur ing devices unless all are returned to the low impedance terminals of the power supply Twisted pairs or shielded cable should be used to avoid pickup on the measuring leads Electronic Load The test and calibration procedures use an electronic load to test the supply quickly and accurately An electronic load is considerably easier to use than load resis tor It eliminates the need for connecting resistors or rheostats in parallel to handle the power it is much more stable than carbon pile load and it makes easy work of switching between load conditions as is required for the load regulation and load transient response tests Current Monitoring Resistor Rs To eliminate output current measurement error caused by voltage drops in the leads and connections connect the current monitoring sampling resis tor between OUT and the load as a four terminal device Fig ure A 3 shows correct connections Connect the current monitoring test leads inside the load lead connections directly at the monitoring resistor element Select a resistor with sta ble characteristics and lower temperature coefficient see Table A 1 VOLATGE MONITORING TERMINALS LOAD Figure A 3 Current Monitoring Resistor Connections Q 9 TO NEGATIVE
75. n the dc output current of a power supply Constant current PARD is specified as the root mean square rms output cur rent in a frequency range of 20 Hz to 20 MHz with the supply in CC operation PARD RMS Measurement Test Parameter Measured Variable Output Current rms Expected Results E3614A Less than 5 mA rms E3615A Less than 2 mA rms E3616A Less than 500 uA rms E3617A Less than 500 uA rms Test Procedure a Connectthe test equipment as shown in Figure A 8 b Turn the supply s power on and turn VOLTAGE con trol fully clockwise Turn up output current to the full rated value Check that the CC indicator remains lighted Reduce CUR RENT control if not lighted d Record rms voltage across Rs and convert it to cur rent by dividing this voltage by Rs e Checkthat the rms noise current is less than 5 mA rms for E3614A 2 mA rms for E3615A and 500 uA rms for E3616A and E3617A respectively POWER SUPPLY UNDER TEST M 1MI 2 CV SENSE L SLAVE ml reMoTEe um Model Rs E3614A 0 1 ohm 0 1 10W z 0 1 ohm 0 1 10W TRUE RMS E3616A 0 1 ohm 0 1 10W VOLTMETER E36UA 1 ohm 1 5W Figure A 8 CC PARD RMS Measurement Test Setup CC Drift Stability Definition The change in output current for the first 8 hours fol lowing a 30 minute warm up with constant input line voltage constant loa
76. o half load or half load to full load Test Parameter Measured Variable Output Voltage Transients Expected Results Less than 50 usec at 15 mV from base line Test Procedure a Connect the test equipment as shown in Figure A 4 but replace the DVM with the oscilloscope Operate the electronic load in constant current mode b Turn the supply s power on and turn CURRENT con trol fully clockwise c Turn up output voltage to the full rated value d Set the electronic load to transient operation mode between one half of supply s full rated value and sup ply s full rated value at a 1 KHz rate with 50 duty cycle e Setthe oscilloscope for ac coupling internal sync and lock on either the positive or negative load transient f Adgjustthe oscilloscope to display transients as in Fig ure A 5 g Check that the pulse width of the transients at 15 mV from the base line is no more than 50 usec as shown PARD Ripple and Noise Definition PARD is the Periodic and Random Deviation of the dc output voltage from its average value over a specified bandwidth and with all other parameters maintained constant Constant voltage PARD is measured in the root mean square rms or peak to peak pp values over a 20 Hz to 20 MHz bandwidth Fluctuations below the lower frequency limit are treated as drift PARD RMS Measurement The rms measurement is not an ideal representation of the noise since fairly high output noise spikes of short
77. o low auto matic cross over to constant current operation will occur and the output voltage will drop Figure 12 and Figure 13 show the rear panel switch settings and terminal connections for Auto series operation of two supplies and three supplies This mode can also give voltage tracking operation of two supplies with two Separate loads Mixed model numbers may be employed in auto series combi nation without restriction provided that each slave is specified as being capable of auto series operation If the master supply is set up for constant current operation then the master slave combina tion will act as a composite constant current source CAUTION Total output voltage to ground must not exceed 240 Vac Determining Resistors External resistors control the fraction or multiple of the master unit s voltage setting that is supplied from the slave unit Notice that the percentage of the total output volt age contributed by each supply is independent of the magnitude of the total voltage For two units in auto series the ratio of R1 to R2 is R1 R2 R1 Vo Vm R2 R1 Vs Vm Where Vo auto series voltage Vs Vm Vm master unit s output voltage Vs slave unit s output voltage For example using the E3617A as a slave unit and putting R2 50 1 4 watt then from the above equations R1 R2 Vm Vs 50 Vm Vs In order to maintain the temperature coefficient and stability perfor mance of the supply choose
78. ocedure or the like which if not correctly performed or adhered to could result in damage to or destruction of part or all of the product Do not proceed beyond CAUTION sign until the indicated conditions are fully understood and met CAUTION The NOTE sign denotes important infor mation It calls attention to a procedure prac tice condition or the like which is essential to highlight DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT Because of the danger of introducing additional hazards do not install substitute parts or perform any unauthorized modification to the instrument Return the instrument to a Agilent Technologies Sales and Service Office for service and repair to ensure that safety features are maintained Instruments that appear damaged or defective should be made inoperative and secured against unintended operation until they can be repaired by qualified service personnel 1 2 Table of Contents SAFETY SUMMARY EE 1 2 GENERAL INFORMATION elf P 1 4 INTR DUGTIONK At aud ke beige se Pepe AE eb B wes 1 4 SAFETY REQUIREMENTS pales tse ance Dated ged dace 1 4 INSTRUMENT AND MANUAL 1 4 UPC eT pP 1 4 ACCESSORY AR HAGE CERE pe RADO RC GEO ERU PCR aN 1 4 DESORPTION sanse RIS DIS pe fie Oso ers 1 4 SPEGIEIGAT
79. ologies Part Number Total quantity used in that assembly Description Manufacturer s supply code number Refer to Table A 9 for manufacturer s name and address Manufacturer s part number or type erence designator ORDERING INFORMATION To order a replacement part address order or inquiry to your local Agilent Technologies sales office see lists at rear of this manual for addresses Specify the following information for each part Model complete serial number of the power supply Agilent Technologies part number circuit reference designator and description Table A 8 Reference Designators nD lt gt c sx Assembly Capacitor Diode Signaling Device light Fuse Pulse Generator Jack Inductor Transistor Resistor Switch Transformer Test Point Zener Diode Integrated Circuit Wire Table A 9 Code List of Manufacturers CODE MANUFACTURER ADDRESS 01295 Texas Instruments Inc Semicon Comp Div Dallas TX 14936 General Instruments Corp Semicon Prod Hicksville N Y 27014 National Semiconductor Corporation Santa Clara CA 28480 Agilent Technologies Palo Alto CA 04713 Motorola Semiconductor Products Phoenix AZ 32997 Bourns Inc Riverside CA 34371 Harris Corp Melbourne FL Reference Designator R84 85 5 C7 8 C9 41 42 43 55 Us C10 48 49 C11 16 17 25 26 C13 14 15 30 32 34 38 39 50 54 EL 3547 Agilen Part Number E3614A
80. oltage reduction be certain that the autotransformer common terminal is connected to the neutral earthed pole of the ac power lines supply mains DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE Do not operate the instrument in the presence of flammable gases or fumes KEEP AWAY FROM LIVE CIRCUITS Operating personnel must not remove instrument covers Compo nent replacement and internal adjustments must be made by qualified service personnel Do not replace components with power cable connected Under certain conditions dangerous volt ages may exist even with the power cable removed To avoid inju ries always disconnect power discharge circuits and remove external voltage sources before touching components DO NOT SERVICE OR ADJUST ALONE Do not attempt internal service or adjustment unless another per son capable of rendering first aid and resuscitation is present SAFETY SYMBOLS Instruction manual symbol the product will be marked with this symbol when it is neces sary for the user to refer to the instruction manual Indicate earth ground terminal D The WARNING sign denotes a hazard It calls attention to a procedure practice or the like which if not correctly performed or adhered to could result inpersonal injury Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met WARNING The CAUTION sign denotes a hazard It calls attention to an operating pr
81. open cir cuit Test Parameters Measured Variable Output Voltage Expected Results Less than 0 0196 plus 2 mV Test Procedure a Connectthe test equipment as shown in Figure A 4 Operate the electronic load in constant current mode and set its current to the full rated value of the power supply 6 A for E3614A 3 A for E3615A 1 7 A for E3616A and 1 A for E3617A b Turn the supply s power on and turn CURRENT con trol fully clockwise c Turn up output voltage to the full rated value 8 V for E3614A 20 V for E3615A 35 V for E3616A and 60 V for E3617A as read on the digital voltmeter d Record the output voltage at the digital voltmeter e Operate the electronic load in open input off mode f Whenthe reading settles record the output voltage on the digital voltmeter again Check that the two recorded readings differ less than 0 0196 of output voltage plus 2 POWER SUPPLY MASTER LOCAL 1 UNDER TEST 2 2 MS1 MS2 CV SENSE cc L suave JL CV CC VREF Al 2 A4 A5 DIGITAL VOLTMETER Model Rs E3614A 15 16 0 1 ohm 0 1 10W ELECTRONIC E3617A 1 ohm 1 5W LOAD
82. ormance check to ensure that the fault has been properly corrected and that no other faults exist Test Equipment Required The following Table A 1 lists the equipment required to perform the tests and adjustments of this section You can separately identify the equipment for performance tests calibration and troubleshooting in the USE column of the table Operation Verification Tests The following tests assure that the power supply is per forming properly They do not however check all the speci fied parameters tested in the complete performance test described below Proceed as follows a Perform turn on checkout procedure given in page 1 7 b Perform the CV and CC Load Regulation perfor mance tests given in the following paragraphs respectively PERFORMANCE TESTS The following paragraphs provide test procedures for verify ing the power supply s compliance with the specifications of Table 1 Please refer to adjustment and calibration or trouble shooting procedure if you observe any out of specification performance Measurement Techniques Setup for All Tests Measure the output voltage directly at the S and S terminals on the rear panel in this way the monitoring device sees the same performance as the feedback amplifier within the power supply Failure to connect the monitoring device to the proper points shown in Figure A 3 will result in the mea surement not of the power supply characteristics but of the power supp
83. oubleshooting STEP ACTION RESPONSE PROBABLE CAUSE 1 Check turn off of Q1 and Q4 by shorting Q9 emitter to collector b Output voltage decreases a Output voltage remains high Q1 or Q4 shorted Remove short and proceed to step 2 2 Check turn on of Q9 by shorting point 1 to 12 V a b Output voltage decreases Output voltage remains high Q9 open Remove short and proceed to step 3 3 Check voltage from pin 5 to pin 6 of U9 STEP ACTION a Input voltage is positive b Input voltage is negative U9B is defective Turn down the voltage control fully counter clockwise Check the voltage of U9 pin 1 is 0 Table A 5 Low Output Voltage Troubleshooting RESPONSE PROBABLE CAUSE 1 Check turn on of Q1 and Q4 by disconnecting emitter of Q9 a Output voltage remains low b Output voltage increases Q1 or Q4 open Reconnect emitter lead and proceed to step 2 2 Check turn off of Q9 by shorting point 1 to 15 V Output voltage remains low b Output voltage increases Q9 shorted Remove short and proceed to step 3 3 Eliminate constant current comparator as a source of trouble by disconnecting anode of CR22 a Output voltage is increases b Output voltage remains low Proceed to step 4 Reconnect lead and proceed to step 5 A 10 Table A 5 Low Output Voltage Troubleshooting Cont d
84. oup 1 Class B CISPR 11 Limits and WMethods of Radio Interference Characteristics of Windustrial Scientific and Medical ISM Radio Frequency Equipment WEN 50082 1 1991 IEC 801 2 1991 Electrostatic Discharge Requirements IEC 801 3 1984 Radiated Electromagnetic Field Requirements IEC 801 4 1988 Electrical Fast Transient Burst Requirements 5 001 This ISM device complies with Canadian ICES 001 Cet appareil ISM est conforme la norme NMB 001 du Can ada INSTRUMENT AND MANUAL IDENTIFICATION A serial number identifies your power supply The serial number encodes the country of manufacture the date of the latest significant design change and a unique sequential number As an illustration a serial number beginning with KR306 denotes a power supply built in 1993 3 1 993 421994 etc 6th week manufacture in Korea KR The remaining digits of the serial number are a unique five digit number assigned sequentially If a yellow Change Sheet is supplied with this manual its pur pose is to explain any differences between your instrument and the instrument described in this manual The change sheet may also contain information for correcting errors in the manual 1 4 OPTIONS Options OEM 0 and OE9 determine which line voltage is selected at the factory The standard unit is configured for 115 Vac 10 For information about changing the line voltage setting see paragraph INPUT POWER REQUIREMENTS
85. rogramming Speed See the table of Specifications page 1 5 MULTIPLE SUPPLY OPERATION Normal parallel and auto parallel operation provides increased out put current while normal series and auto series provides increased output voltage Auto tracking provides single control of output volt age of more than one supply You can set up the unit for multiple supply operation by changing the settings of the rear panel switch and connecting the leads from the rear panel terminals to the load Solid conductors of 0 75 to 1 5 mm can be connected to the rear panel terminals by simply push fitting Thinner wires or conductors are inserted into the connection space after depressing the orange opening lever NORMAL PARALLEL OPERATION Two or more power supplies being capable of CV CC automatic cross over operation can be connected in parallel to obtain a total output current greater than that available from one power supply The total output current is the sum of the output currents of the individual power supplies The output of each power supply can be set separately The output voltage controls of one power sup ply should be set to the desired output voltage the other power supply should be set for a slightly higher output voltage The sup ply with the higher output voltage setting will deliver its constant current output and drop its output voltage until it equals the out put of the other supply and the other supply will remain in con st
86. s Figure 5 Remote Voltage Sensing Remote Analog Voltage Programming Remote analog voltage programming permits control of the regu lated output voltage or current by means of a remotely varied volt age The programming external voltage should not exceed 10 volts The stability of the programming voltages directly affects the stability of the output The voltage control on the front panel is disabled during remote analog programming CAUTION The supply includes clamp circuits to prevent it from supplying more than about 120 of rated output voltage or current when the remote programming voltage is greater than 10 Vac Do not intentionally operate the sup ply above 100 rated output Limit your programming voltage to 10 Vac Remote Programming Connections Remote programming requires changing settings of the switch and connecting external voltages to and terminals of CV or CC on the rear panel Any noise picked up on the programming leads will appear on the supply s output and may degrade regulation To reduce noise pick up use a twisted or shielded pair of wires for programming with the shield grounded at one end only Do not use the shield as a conductor Notice that it is possible to operate a power supply simulta neously in the remote sensing and the remote analog program ming modes Remote Programming Constant Voltage Figure 6 shows the rear panel switch settings and terminal connections for remote
87. s 250 uA Line Regulation Source Effect Definition Line regulation is the change in the steady state value of dc output current due to a change in ac input voltage from the minimum to maximum value 10 of nominal voltage Test Parameter Measured Variable Output Current Expected Results Less than 0 0196 plus 250 uA Test Procedure a Connect the DVM across Rs in Figure A 4 Operate the electronic load in constant voltage mode and set its voltage to the full rated value of power supply b Connect the supply to the ac power line through a variable autotransformer that set for low line volt age 104 Vac for nominal 115 Vac 90 Vac for nominal 100 Vac and 207 Vac for nominal 230 Vac c Turn the supply s power on and turn VOLTAGE con trol fully clockwise d Turn up output current to the full rated value Check that the AMPS display reads full rated values and CC indicator remains lighted Reduce CURRENT control if not lighted e Record output voltage across Rs and convert it to current by dividing this voltage by Rs f Adjust autotransformer to the high line voltage 127 Vac for nominal 115 Vac 110 Vac for nominal 100 Vac and 253 Vac for nominal 230 Vac 9 When the reading settles record the voltage across Rs again and convert it current Check that the two recorded readings differ less than 0 0196 of output current plus 250 pA PARD Ripple and Noise Definition The residual ac current which is superimposed o
88. sive ripple on reference voltages Table A 2 Poor Line Regulation Constant Voltage Check 10 V reference voltage Check U9 A 9 Table A 3 Overall Troubleshooting Cont d SYMPTOM CHECKS AND PROBABLE CAUSES Poor Load Regulation a Referto Measurements Techniques paragraph Constant Voltage b Check 10 V reference voltage c Ensure that the supply is not going into current limit Poor Load Regulation a Check 10 V reference voltage Constant Current b CR1 CR19 CR20 C2 C31 leaky c Ensure that the supply is not crossing over to constant voltage operation Oscillates Constant Voltage a Check C29 and C36 in constant voltage circuit Constant Current b Check C31 and C33 in constant current circuit Poor Stability a Check 10 V reference voltage Constant Voltage b CR27 CR28 CR23 and CR26 leaky c 09 defective d Noisy programming resistor R83 Poor Stability a Check 10 V reference voltage Constant Current b CR24 CR25 CR29 and CR30 leaky c U9 U10 defective d Noisy programming resistor R85 Excessive heat a Check preregulator control circuit Refer to Table A 6 b CR10 CR12 CR15 and CR18 short OVP Shutdown a Checkthat the front panel OVP Adjust screw control is rotated fully clockwise b Check the overvoltage protection circuit Refer to Overvoltage Protection Circuit Troubles paragraph or Table A 7 Table A 4 High Output Voltage Tr
89. tches M S 1 and M S 2 be set to MAS TER position and CV CC and SENSE to LOCAL position 1 Check that input power is available and check the power cord and rear panel line fuse When replacing line fuse be certain to select fuse of proper rating for line voltage being used 2 n almost all cases the trouble source can be caused by the dc bias or reference voltages thus it is a good practice to check voltages in Table A 2 before pro ceeding with step 3 3 Disconnect the load and examine Table A 3 to deter mine your symptom then check the probable cause Reference and Bias Circuit a Make an ohmmeter check to be certain that neither the positive and negative output terminal is grounded b Turn front panel VOLTAGE and CURRENT controls fully clockwise Turn on power supply no load connected d Proceed as instructed in Table A 2 Regulating Loop Troubles If the voltages in Table A 2 have been checked to eliminate the reference and bias circuits as a source of trouble the mal function is caused by either the series regulator or preregula tor feedback loop Because the interaction between these two loops makes logical troubleshooting difficult the following steps help you to locate the source of troubles in these two feedback loops Once the trouble has been located to one of the feedback loops the operation of either loop can be ana lyzed independently This method should be followed when ever a low output voltage con
90. turned on This function prevents the supply from false OVP tripping the moment the power is turned on After the troubles has been isolated to overvoltage protection cir cuit troubleshooting can proceed as described in Table A 7 Table A 2 Reference and Bias Circuit Troubleshooting METER METER NORMAL INDICATION NORMAL RIPPLE PROBABLE CAUSE COMMON POSITIVE p p TP6 point 2 15 0 0 3 2mV Check U13 CR31 and CR32 TP6 point 4 12 0 0 3 Vdc 2mV Check 15 V bias U14 TP6 TP7 10 5 0 2 2mV Check 15 V bias 011 and U14 TP6 point 3 5 1 0 5 Vdc 2mV Check 12 V bias or VR1 TP6 point 5 5 0 0 3 Vdc 4mV Check U1 and CR2 Table A 3 Overall Troubleshooting SYMPTOM CHECKS AND PROBABLE CAUSES High Output Voltage Check series regulator feedback loop or preregulator feedback loop Refer to Regulating Loop Troubles paragraph or Table A 4 or A 6 as instructed Low and No Output Voltage If output is zero check fuse Check series regulator feedback loop or preregulator loop Refer to Regulating Loop Troubles paragraph or Table A 5 or A 6 as instructed Check CR20 shorted High Ripple Check operating setup for ground loops If output floating connect 1 uF capacitor between output and ground Ensure that the supply is not crossing over to constant current mode under loaded conditions Check for low voltage across C7 or Q1 and Q4 Check for exces
91. urce and resistors NOTE Voltage and Current Programming of the E3614A 15A 16A 17A with a Voltage and Current Source Remote analog voltage programming permits control of the regulated output voltage or current by means of a remotely varied voltage or current The stability of the programming voltages directly affects the stability of the output The voltage control or current control on the front panel are disabled during analog programming The CV terminal on the rear panel is internally connected to the plus output terminal In following connections it is recommended to use Figure 2 Figure 4 or Figure 6 if the negative terminal of the Programming Voltage is not floted from its circuits Constant Voltage Mode The programming voltage is not isolated from the power supply output The power supply may be programmed with a voltage that is common to either the plus output or the minus output Programming Voltage Common to the Plus output CV4 n Programming Voltage output Power Supply output Figure 1 Set the CV switch down on the rear panel and all others up Vin VA x Vout Vout A X Vin Where V 1 the power supply output voltage Vin IS the programming voltage A is the gain factor and the values of each model are as below Model A 1 A E3614A 0 8 1 25 E3515A 2 0 0 5 E3616A 3 5 0 29 E3617A 6 0 0 17 1 10 1 Programming Volta
92. urrent rating The output current of each slave is approximately equal to the master s Figure 9 and Fig ure 10 show the rear panel switch settings and terminal connections for auto parallel operation of two supplies and three supplies Setting Voltage and Current Turn the slave unit s CURRENT control fully clockwise Adjust the master unit s controls to set the desired output voltage and current The master supply operates in a completely normal fashion and may be set up for either con stant voltage or constant current operation as required Verify that the slave is in CV operation For auto parallel operation of two supplies the combined output voltage is the same as the master unit s voltage setting and the combined output current is two times the master unit s current In general for two supplies the auto parallel output current lo is lo Im Is 2Im where Im master unit s output current Is slave unit s output current NOTE Proportional currents from auto paralleled units require equal load lead voltage drops Connect each supply to the load using separate pairs of wire with length chosen to provide equal voltage drops from pair to pair If this is not feasible connect each supply to a pair of distribution terminals using equal voltage drop wire pairs and then connect the distribution terminals to the load with a single pair of leads MASTER POWER SUPPLY T MASTER LOCAL 22 fo Hn MS
93. wer supply output voltage and R2 should be in the to 100KQ range 1 10 3 Constant Current Mode The E3614A 15A 16A 17A may be programmed for constant current with an analog voltage or current Constant current with analog voltage programming can only be achieved with a voltage source that is common with the positive output terminal Constant Current with Voltage Programming CC 4 T Programming Voltage CC I output output Figure 5 Set the CC switch down the rear panel and all others up Vin VA x Lout Tout A x Vin Where Iout 18 the power supply output current Vi A is the transconductance in Amp Volt and the values of each model are as below n is the programming voltage Model A A V 1 A V A E3614A 0 6 1 67 E3515A 0 3 3 33 E3616A 0 17 6 0 E3617A 0 1 10 Constant Current with Current Programming When using current to program the power supply the source must have a dynamic range of 10 volts when the programming source is common to the plus output and 10 volts plus the maximum output voltage expected when the programming source is common to the minus output of the power supply The load to the power supply must be stable for the constant current output to be accurate Current transient response is not specified and depends on the change of the output voltage of the power supply 1 10 4 R1 92 8 Kohm CC _ cC Common

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