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OPERATOR MANUAL KEPCO®

1. 3 13 3 4 11 Changing Maximum Voltage or Current 3 13 3 4 12 Storing Power Supply Output eem nennen nens 3 13 3 4 13 Recalling Stored 665 2 2 2 2 0 ere tante dere de eid unen da Decree een 3 14 3 4 14 Enabling Remote Analog 3 14 3 4 15 Local Mode Programming of the Power eene 3 14 3 4 15 1 Creating or Modifying a Program Program Edit 3 14 3 4 15 1 1 Modifying Programmed Time 3 14 3 4 15 1 2 Time Interval Accuracy ure RUE nu Dee ee 3 15 3 4 15 1 3 Display Program Option eene nennen 3 15 3 4 15 2 R nning a Progratri euet tra ie e pese AER Teo Pe Xie Loin 3 15 3 4 15 3 Stepping Through a Program eere tee deste ite eee dede tee e 3 15 3 4 15 4 3 15 3 4 15 5 Running a Program Once 3 17 3 4 15 6 Stopping Program uie eiie tle e ERU dei oes Hn dox dice oie Le dnd t idees 3 17 3 4 15 7 Stopping a Running 3 17 3 4 15 8 sample Prograt reete 3 17 3 4 16 Calibration E
2. 3 4 3 2 3 Load Connection Method Remote Error 3 5 3 24 Load Connection Method 1 3 6 3 3 Overvoltage Crowbar Setup and 3 7 3 3 1 Setup and Check Procedure ieri 3 7 3 4 Local Mode Operation Keypad 3 7 3 4 1 Front Panel Keypad and LOD i iii nananet 3 8 3 4 1 1 Command Entry Status 1 te 3 8 3 4 1 2 Data Entry tpe tee e e eet ae e depo ea a ea ed 3 8 3 4 1 3 Display 6 MC 3 8 3 4 1 4 Keypad FU nctioris 2 1 3 8 3 4 2 Turning the Power Supply On deer EE dee 3 10 3 4 3 oetting Eocal MOode e 3 11 3 4 4 Adjusting ECD Coritrast eremi teinte orae dee Loo Ard E ede rene 3 11 3 4 5 Enabling Disabling Audible 3 11 3 4 6 Enabling Disabling DC 3 11 ATE DMG020613 TABLE OF CONTENTS SECTION PAGE 3 4 7 p can ee hE Stone edad 3 11 3 4 8 Setting Output Voltage or 3 12 3 4 9 Setting Overvoltage or Overcurrent Protection 2 eene 3 12 3 4 10 Changing Protection Delay
3. 3 17 3 5 Analog Remote Programiming orb idet trie PORE Ee DR 3 18 3 6 Digital Remote Mode 3 19 3 6 1 IEEE 488 GPIB Bus Protocol tere de et er HERRERA ERR RR trm PRESE 3 19 3 6 2 3 21 3 6 3 Changing the GPIB Address inet ee bee 3 21 3 6 4 Enabling Remote Analog Control essen 3 21 3 6 5 Programming Techniques to Optimize performance meme 3 21 3 7 SCPI Programmlirigs 3 22 3 7 1 Nie MICI 3 22 3 7 2 Common Commands Queries 3 22 3 7 3 SCPI Subsystem Command Query Structure 3 22 3 7 3 1 ABORESUbSyStem cia Acct cect 3 23 3 7 3 2 DIAG SUBSYSTEM c 3 23 3 7 3 3 DISPlay SubSyst m rentem ert 3 23 3 7 3 4 INI Tiate Subsystem niei pede etre eire tede ei tee ok Decide sete 3 23 3 7 3 5 LIS T Subsystem ien eem Rapt TERREA OE iR 3 23 3 7 3 6 MEASUrS SUbsySsltelm 2 aen apes gebe nb sates dex Reap p deett ape 3 23 3 7 3 7 OUTPut Subsystem oine ii enie ten oer get dde don 3 23 3 7 3 8 Protection SUbsystetri t edt nie dee esee 3 23 3 7 3 9
4. 4 1 4 3 Calibration Procedures 4 1 4 3 1 Voltage Cali ration 4 2 4 3 2 Current Calibrations ine dhl diene AS ee Ue 4 2 4 4 Changing the Calibration 4 3 4 5 Restoring Previous Calibration 4 4 4 6 Restoring Factory Calibration 4 4 APPENDIX A IEEE 488 2 COMMAND QUERY DEFINITIONS A 2 CES Clear Status 2 2222 da A 1 A 3 ESE Standard Event Status Enable Command sese een A 1 AA ESE Standard Event Status Enable nennen A 2 A 5 ESR Event Status Register A 2 A 6 IDN Identification QUery 1 ro tb eed tee ves Rh eee pit Ee Seti die ex eda na A 2 OPC Operation Complete A 2 8 OPC Operation Complete A 2 A 9 Options QUEM E A 3 A 10 RGL Recall toe ceca cas A 3 A 11 RST Reset Command uer aa dde A 3 A 12 SAV Save Command rete tenete E TEET A 3 A 13 SRE Service Request Enable A 4 A 14 SRE Service Request Enable
5. 0000 000000 5000 0000 0090009 0880 50000000 0000 0000 000000 5000 N EXHAUS 00090009 1 5000 0000 0090009 0880 0000 000000 3 0000 OOOOO0 000000061 0000 0000 000000 0000 08000 00009 0090009 0880 oo 1 0000 0000 Oooo 0000 00 1 0000 0090009 0009001 00 0000 000000 50007 FIGURE 1 2 MECHANICAL OUTLINE DRAWING SHEET 1 2 ATE DMG OPER 020613 96 39 64 168 00 47 64 44 05 TABLE MOUNTING INSTRU gt HOLES 5 FO QD BOTH SIDE C TIONIS o 7 0 amp E FOR SLIDES EE TABLE 1 FOR R gt MOUNTING TABLE SLIDE TYPE NTING HOLES NOTES 1 MATERIAL 2 4 5 4 PLASTIC 1 8 THICK MOUNTING 6 IF INSTALLATION OR BY FIXED BR 8 DIMENS 9 TOLERANCES A 3010151 E HOLE Tt S IN PARENT PLATE OUT SLIDES N MO 0 199 DIA HAS amp BACK PLATE GRAY ACKETS AND CHASSIS NSTALLAT MOUN MOUNT ON FOR UNTING OTHER DIMENSIONS 1 32 0 8 EXCERT AS NOTED PER VINII SIDE CAN BE RE TING REMOVE 4 META G INSERTS 4 20 BE 14 CRS FE ZU S DESIRED THE OUNTED ON THE gt ARE IN RACK ADDED A B 110 QDe20
6. 5 DCL Device Clear Received GET Group Execute Trigger Received GTL Go To Local Received IFC Interface Clear Received LLO Local Lockout Received MLA My Listen Address Received MTA My Talk Address Received OTA Other Talk Address Received Not Used RFD Ready for Data Received or Sent SDC Selected Device Clear Received SPD Serial Poll Disable Received SPE Serial Poll Enable Received SRQ Service Request Sent UNL Unlisten Received UNT Untalk Received ATE DMG 020613 TABLE 3 7 IEEE 488 GPIB BUS DATA MODE MESSAGES MNEMONIC MESSAGE DESCRIPTION COMMENTS DAB Data Byte Received or Sent END End Received or Sent EOS End of String Received or Sent RQS Request Service Sent STB Status Byte Sent 3 6 2 3 6 3 3 6 4 3 6 5 DCL CONTROL The device clear DCL and selected device clear can be set to operate in two modes In the output OV mode when the device clear is received the output of the power supply is set to zero volts In the output unchanged mode sending DCL or selected DCL has no effect on out put voltage and current as required by IEEE specification 488 2 The factory default value is output unchanged mode NOTE When set to output OV mode the power supply will power up with OUTPUT set to OFF To change the DCL mode the unit must be in command entry mode then depress the MENU key three times The top line of the display will show
7. 4 1 41 22 222 6 20400060 3 B 12 READ VOLTage SCALar DC Query sse B 12 SOURce CURRent L EVel IMMediate AMPlitude Command B 12 SOURce CURRent L EVel IMMediate AMPlitude Query sees B 12 SOURce CURRent LIMit HIGH 1 B 12 SOURce CURRent LIMit HIGH B 12 SOURce CURRent 13 SOURce CURRent LEVeI MODE nnns B 13 SOURce CURRent PROTection LEVel B 13 SOURce CURRent PROTection LEVel Query sse B 14 SOURce CURRent PROTection CLEar Command esses B 14 SOURce CURRent PROTection TRIPped B 14 SOURce CURRent LEVel TRIGgered AMPlitude B 14 SOURce CURRent LEVel TRIGgered AMPlitude Query 1 B 14 SOURce VOLTage L EVel IMMediate AMPlitude Command 14 SOURce VOLTage LEVel IMMediate AMPlitude B 15 SOURce VOLTage LEVel TRIGgered
8. GROUNDING N PA NETWORK TB z DHL 4 A 201 4 123 4 5 6 7 8 9 08 GRD HS Ca GROUNDING IETWORK 2 eU C NOTE NUMBERS IN CIRCLES REFER TO STEPS OF PAR 2 7 4 FIGURE 2 6 REQUIRED STEPS FOR ATE FAST MODE CONVERSION 2 8 OPERATING CONFIGURATION The operating configuration can be determined by pressing MENU on the front panel keypad six times with the unit in command entry status The LCD top line reads ATE VVAA VV is Vmax AA is Imax e g for the ATE 100 10DMG top line reads 10010 The LCD bottom line displays a 6 digit number factory calibration date followed by a 3 digit number followed by the firmware version number ATE DMG 020613 2 9 2 10 Blank 3 1 3 1 2 SECTION 3 OPERATION GENERAL Interconnections between an a c power source and a stabilized power supply and between the power supply and its load are as critical as the interface between other types of electronic equip ment If optimum performance is expected certain rules for the interconnection of source power supply and load must be observed by the user These rules are described in detail in the following paragraphs SAFETY GROUNDING National and international safety rules dictate the grounding of the metal cover and case of any instrument connected to the a c power source LN WARNING KEEP INSTRUMENT GROUNDED WHILE IT IS CONNECTED TO THE A C POWER SOURCE Kepco power supplies wi
9. A 5 A 15 STB Status Byte Register A 5 A 16 Trigger Command edere te taceo a dede A 5 A 17 TST Self Test d eode ain ek ag eae 5 APPENDIX SCPI COMMAND QUERY DEFINITIONS B 1 erp imde ei een die ee te fex entes B 1 B 2 ABORt Command ueni ed e beg e IR UE ee e dee ce B 2 B 3 CALibrate CURRent LEVel 3 4 CALibrate CURRent DATA Command 3 5 CALibrate PASSword sss nnn B 4 B 6 CALibrate SAVE 4 2 2 2 04 nett ennt ren nnne nnn B 4 B 7 CALibrate STATus Command sss eene B 4 B 8 CALibrate STATUS Z QUE ur eie RR RET Et Od B 4 B 9 CALibrate VOLTage LEVel sse B 4 B 10 CALibrate VOLTage DATA B 5 B 11 CALibrate ZERO ire a iei eee C pet eei e er ied edt B 5 B 12 DIAG EXT Gomtatnd teen tinto aee t m ee cette dett cute dm Ss B 5 B 13 DIAG EXT QU ty e e UR eee B 5 B 14 DISPlay CONTrast Command 2 402 0200 200440 4 0 00000008000 nennen nnne B 5 B 15 DISPlay CON Trast Que
10. Hardware Overvolt age Protection OVP Type Control range Trigger time normal Trigger time delayed Threshold Temperature Coefficient Crowbar 1 6 or 3V whichever is greater to 110 Eo max Local manual 50 microseconds Slow mode 500 microseconds Fast mode Minimum 0 5 volts or 2 Eo max whichever is greater 0 02 max of Eo max per C SoftwareOvercurrent Protection OCP See Table 1 4 and PAR 3 4 3 Digital setting local or remote Action crowbar the output CONTROL Voltage Local Digital with 12 bits resolution Front panel keypad 24 keys Remote Digital with 12 bits resolution Using GPIB SCPI commands Current Local Digital with 12 bits resolution Digital using front panel 24 keypad Remote Digital with 12 bits resolution Using GPIB SCPI commands Programming Voltage lt 0 03 max accuracy Current lt 0 03 lo max Readback Display Voltage lt 0 05 max accuracy Current lt 0 03 lo max see condition 0 0596 10 max for 6V and 15V models GENERAL ENVIRONMENTAL CHARACTERISTICS Operating Temperature 0 to 50 C Derate output power 10 at temperatures above 55 C Storage Tempera 20 to 70 C ture Humidity 0 to 95 RH Non condensing operating amp storage Shock 20g 11 50 half sine Non operating 3 axes 3 shocks each axis Vibration 5 10Hz 10mm double amplit
11. lt 0 3 lo max 1 For l gt 50A load effect 2mA typ 5mA max in slow mode The output capacitor adds 0 6 mA to current mode load effect 2 One terminal grounded so that common mode current does not flow through load or current sense resistor 3 Bandwidth 20Hz 10 MHz 4 Preamplifier offsets are given for the calculation of the output effects of preamplifiers A B if either of these amplifiers is used for operational programming In this case the value of the external feedback and input resistors the amplifier offsets and the reference voltage variations are combined in the Error Equation which represents the worst case output effects for the application at hand AE o 1 ref AEo preamp AE where _ Total Preamp Output Voltage change Change in the Voltage Reference Change in Offset Voltage Alio Change in Offset Current Rf External Feedback Resistor Ri External Input Resistor NOTE 1 Variations in the value of the feedback and input resistors are considered secondary effects in the error equation NOTE 2 In the voltage mode of operation the calculated preamp output effect AEO preamp must be multiplied by the fixed gain of the ATE voltage channel to find out the total effect on the output voltage of the ATE power supply The fixed gain of the ATE voltage channel is given by GAIN
12. Value bigger than limit CURR Returns 3 3 OUTP PROT DEL 0 Protection will trip immediately upon detection of overvoltage or overcurrent condition OUTP PROT DEL Returns 0 CURR PROT TRIP 0 indicating overcurrent protection not tripped OVERCURRENT CONDITION 1 SECOND OCCURS CURR PROT TRIP 1 indicating overcurrent protection tripped CURR PROT CLE Overcurrent condition cleared CURR PROT TRIP 0 indicating overcurrent condition not tripped CURR Returns small value approx 1 of full scale current rating OUTP PROT DEL 7 47 Protection will trip if overvoltage or overcurrent condition still present approx 0 575 seconds after detection OUTP PROT DEL Returns 7 50 CURR 2 5 Power supply output current programmed to 2 5A OVERCURRENT CONDITION 1 SECOND OCCURS After 10 seconds CURR PROT TRIP 0 indicating overcurrent condition not tripped CURR Returns 2 5 FIGURE B 5 PROGRAMMING CURRENT ATE DMG 020613 B 13 57 SOURce CURRent PROTection LEVel QUERY CURR PROT Syntax Short Form SOUR CURR PROT LEV MIN MAX Long Form SOURce CURRent PROTection LEVel MIN MAX Return Value lt exp_value gt digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Returns value representing current protection level CURR PROT returns value set by CURR PROT CURR PROT MAX returns maximum current protection value see Table 1 2 This value is determined at the factory and cannot be
13. 1 For determining dynamic impedance in voltage mode 2 Based on 0 5mA load effect in FAST mode 3 For determining dynamic impedance in current mode TABLE 1 2 ATE DMG SERIES SPECIFICATIONS SPECIFICATION RATING DESCRIPTION CONDITION INPUT CHARACTERISTICS A C Voltage nominal 104 115 208 230Va c User selectable See PAR 2 3 Tolerance 8 7 Frequency nominal 50 60 Hz Tolerance 3Hz Current 20A a c maximum Max load 125V a c OUTPUT CHARACTERISTICS d c Output Series Pass Transistor Type of Stabilizer Automatic crossover Voltage Current Voltage 0 to 100 of rating 0 to 55 C 55 to 65 C Current 0 100 of rating Usable range limited to approximately 1 to 100 0 90 of rating Static Specifications See Table 1 5 Dynamic Specifications See Table 1 3 Error sense 0 5V per load wire 0 25V for 6V model Voltage allowance Isolation Voltage 500V d c or peak Between each output terminal and chassis ground Leakage current Output to Ground 5 microamperes max rms at 115V a c 50 microamperes max p p at 115V a c Software Overvoltage Protection OVP See Table 1 4 and PAR 3 4 3 Digital setting local or remote Action crowbar the output 1 2 ATE DMG OPER 020613 TABLE 1 2 ATE DMG SERIES SPECIFICATIONS Continued SPECIFICATION RATING DESCRIPTION CONDITION OUTPUT CHARACTERISTICS CONTINUED
14. 10 where Eo is the maximum rated output voltage of each ATE model In the current mode of operation the effect of the preamplifier offsets on the total output current may be expressed as a percentage of lo max by the equation 5 For high voltage ATE 325 0 8M the maximum output ripple and noise is 10mV rms and 50 mV p p Alo 1 6 FEATURES 1 6 1 OVERVOLTAGE OVERCURRENT PROTECTION Overvoltages and Overcurrent protection values can be individually programmed via the front panel keypad or remotely via the IEEE 488 2 GPIB using SCPI commands refer to PARs 3 4 9 and 3 7 When overvoltage or overcurrent is detected the power supply is programmed to 0 volts with a small current and the power supply responds as if an RST command was received over the GPIB bus See Table 1 4 for maximum programmable settings 1 611 PROGRAMMABLE OVERVOLTAGE OVERCURRENT DELAY Changing the output settings may cause large output transients common with reactive loads that can trip the overvoltage overcurrent protection The ATE DMG can be programmed to delay sensing of overvoltage overcurrent protection when output settings are changed to avoid inad vertent tripping After the delay the programmed overcurrent overvoltage setting is effective Protection can be delayed up to approximately 8 seconds after the output settings are changed Refer to PAR 3 4 10 ATE DMG OPER 020613 1 6 1 2 1 6 2 1 6 3 1 7 1 8 1 9 1
15. Because the voltage measured will be used as reference for calibration the DVM itself must be calibrated accurately During voltage calibration the voltage overvoltage and voltage readback are calibrated and during current calibration the current overcurrent and current readback are calibrated The normal procedure is to calibrate voltage first and then current However you do not have to do a complete calibration each time If required you may calibrate only the voltage or the current and then proceed to saving the calibration results For voltage calibration all loads must be disconnected and the sense terminals connected to the corresponding output termi nals The digital voltmeter will be connected to the output of the power supply For current cali bration after disconnecting all loads an appropriate shunt resistor will be connected across output terminals and the digital voltmeter will be connected across the sense terminals of the shunt resistor PROGRAM MESSAGE STRUCTURE SCPI program messages commands from controller to power supply consist of one or more message units ending in a message terminator required by Kepco power modules The message terminator is not part of the syntax it is defined by the way your programming language indi cates the end of a line newline character The message unit is a keyword consisting of a sin gle command or query word followed by a message terminator CURR lt newline gt TRI
16. LEVel MMediate AMPLitude val AMPLitude MIN MAX TRIGgered AMPLitude val AMPLitude MIN PROTection MODE MODE TRIPped CLEar HIGH val HIGH MIN MAX CURRent LEVel MMediate AMPLitude val AMPLitude MIN MAX TRIGgered AMPLitude val AMPLitude MIN MAX MODE MODE PROTection TRIPped CLEar HIGH val HIGH MIN MAX FUNCtion VOLTage CURRent MODE LIST subsystem LIST CURRent LEVel val LEVel PROTection val PROTection VOLTage LEVel val LEVel PROTection val PROTection INDex val INDex SEQuence 5 val STARt 2 NEXT val DWELI val DWELI STATus subsystem STATus OPERation CONDition val ENABIe EVENt PRESet QUEStionable CONDition val 4 VOLTage CONDition val 2 CURRent CONDition ENABle val 2 SYSTem subsystem SYSTem ERRor NEXT CODE NEXT ALL PASSword CENAble code STATe CDISenable code NEW OLD NEW SECUrity IMMediate LANGuage SCPI COMPatibility BEEP VERSion boolean INSTRument subsystem INSTrument CATalog NSELect val NSELect SELect val SELect STATe STATe ON OFF FIGURE 3 8 TREE DIAGRAM OF SCPI COMMAN
17. digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Returns value representing voltage limit set by VOLT LIM HIGH command Related Commands VOLT LIM HIGH VOLT See example Figure B 6 68 SOURce VOLTage LEVel MODE COMMAND VOLT MODE Syntax Short Form SOUR VOLT LEV MODE FIX EXT Long Form SOURce VOLTage MODE FlXed EXTernal Description Establishes whether control of the output voltage is via keypad or GPIB commands FIXED or via external analog 0 to 10V reference EXTERNAL Setting is stored in NVRAM and retained upon subsequent power up ATE DMG 020613 B 15 B 69 SOURce VOLTage LEVel MODE QUERY VOLT MODE Syntax Short Form SOUR VOLT LEV MODE Long Form SOURce VOLTage LEVel J MODE Return Value FIXED or EXTERNAL Description Returns FIXED or EXTERNAL depending on whether voltage control is from the keypad or GPIB interface FIXED or from an external analog reference voltage EXTERNAL B 70 SOURce VOLTage PROTection LEVel COMMAND VOLT PROT Syntax Short Form SOUR VOLT PROT LEV exp value Long Form SOURce VOLTage PROTection LEVel exp value exp value digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Sets overvoltage protection level for power supply If the value is out of the acceptable overvoltage range for the power supply model error message 222 Data out of range is posted in the output queue If the power s
18. AMPlitude Command B 15 SOURce VOLTage LEVel TRIGgered AMPlitude B 15 SOURce VOLTage LIMit HIGH Command sss B 15 SOURce VOLTage LIMit HIGH Query sss eene B 15 SOURce VOLTage LEVel MODE Command sss B 15 SOURce VOLTage LEVel MODE Query sse B 16 SOURce VOLTage PROTection LEVel Command sese B 16 SOURce VOLTage PROTection LEVel 16 SOURce VOLTage PROTection CLEar essent B 17 SOURce VOL Tage PROTection TRIPped Query seen B 17 SOURce FUNCtion MODE Query sss enne tentent nnne nnns B 17 STATus OPERation CONDition sss tentent B 17 STATus OPEReration ENABle Command sess nter B 17 STATus OPEReration ENABle Query sse nnne enne trn B 18 STATus OPERation EVENIt Querys isnie eeii ie aaia ie eaa i iaa aiei B 18 STATus PRESet Command 18 ATE DMG020613 SECTION B 80 81 82 83 B 84 B 85 B 86 B 87 B 88 B 89 B 90 91 92 93 B 94 B 95 B 96 ATE DMG020613 TABLE OF CONTENTS PAGE STATus QUEStionable EVENt ener nnn 19 STATus QUES
19. Long Form SOURce CURRent LEVel IMMediate AMPlitude MIN MAX Return Value exp value digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Returns either the programmed value maximum value or minimum value of current The CURR query returns the programmed value of current Actual output current will depend on load con ditions The CURR MAX query returns the maximum current allowed for a particular model CURR Returns programmed current value CURR MAX returns maximum current allowed for power supply CURR MIN returns minimum current allowed for power supply always 0 Related Commands CURR See example Figure B 1 52 SOURce CURRent LIMit HIGH Command CURR LIM HIGH Syntax Short Form SOUR CURR LIM HIGH lt exp_value gt Long Form SOURce CURRent LIMit HIGH lt exp_value gt lt exp_value gt digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Sets limit for maximum power supply output current If the value is out of the acceptable current range for the power supply model error message 222 Data out of range is posted in the output queue If the user tries to set an output current value larger than the CURR LIM HIGH setting a value corresponding to the current limit will be programmed and error message 301 Value bigger than limit is posted in the output queue NOTE If the current limit is changed any previously established trigger levels higher than the new
20. RST command sets INIT CONT to OFF See example Figure B 1 B 22 INITiate CONTinuous QUERY INIT CONT Syntax Short Form Long Form INITiate CONTinuous Return Value 1 or 0 Description Determines whether continuous triggers are enabled or disabled Power supply returns value of INIT CONT flag 1 continuous triggers are enabled ON 0 continuous triggers dis abled OFF See example Figure B 1 23 INSTrument STATe COMMAND INST STAT Syntax Short Form INST STAT val Long Form INSTrument STATe val Description Operation is identical to OUTPut STATe command PAR B 42 and is provided for compatibility with other vendors products B 24 LIST CURRent COMMAND LIST CURR Syntax Short Form LIST CURR LEV exp value Long Form LIST CURRent LEVel exp value exp value digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Sets the current Amps value for the memory location selected by LIST IND If the value is out of the acceptable current range for the power supply model an error message 222 Data out of range is posted in the output queue The current value is stored in non volatile memory and is retained when the power supply is turned off Related Commands LIST IND LIST IND LIST CURR See exam ple Figure B 4 B 25 SOUR LIST CURRent QUERY LIST CURR Syntax Short Form LISTCURR LEV Long Form
21. S and S used to connect external sensing leads 3 5 M and used for output monitor connections 4 Ground 8 9 Used to connect or disconnect internal grounding network see PAR 2 6 1 2 4 Output terminals Used to connect load 5 Source power terminal Used to connect source power accepts 3 wire a c input cord supplied block ATE DMG 020613 FIGURE 2 2 ATE DMG FULL RACK SERIES REAR PANEL 2 3 2 4 TABLE 2 3 INTERNAL CONTROLS AND THEIR FUNCTIONS REFERENCE DESIGNATION CONTROL PURPOSE CAUTION Adjustment of any internal control will affect digital control of the output voltage and invalidate factory calibration refer Calibration Section 4 R18 lo MAX Maximum Output Current R27 Eo LAG Voltage Channel Stability Control R30 Eo ZERO Voltage Channel Zero Control R35 lo ZERo Current Channel Zero Control R68 PREAMP CURRENT ZERO Offset Zero Control for CURRENT PREAMP R67 PREAMP VOLTAGE ZERO Offset Zero Control for VOLTAGE PREAMP INTERCONNECTION ADAPTER ASSEMBLY A11 R35 Lo ZERO RIB R30 Ea ZERO R27 Ea LAG R67 VOLTAGE ZERO R66 CURRENT ZERO FIGURE 2 3 LOCATION OF INTERNAL CONTROLS ATE DMG 020613
22. TABLE 2 4 INPUT OUTPUT PIN ASSIGNMENTS FOR REMOTE CONTROL CONNECTOR PIN SIGNAL NAME FUNCTION 1 0101 Line 2 0102 Line 3 0103 Line 4 0104 Line 5 End or Identify 6 DAV Data Valid 7 NRFD Not Ready for Data 8 NDAC Not Data Accepted 9 IFC Interface Clear 10 SRQ Service Request 11 ATN Attention IEEE 488 12 SHIELD Shield PORT 13 0105 Line 14 0106 Line 15 0107 Line 16 0108 Line 17 Remote Enable 18 GND Ground signal common 19 GND Ground signal common 20 GND Ground signal common 21 GND Ground signal common 22 GND Ground signal common 23 GND Ground signal common 24 LOGIC GND Logic Ground 2 3 SOURCE POWER REQUIREMENTS This power supply is normally configured for operation on a single phase nominal 115V a c line For conversion to other a c source voltages refer to Figure 2 4 Select your nominal source voltage and change the links on the barrier strip of T201 according to the table provided in Fig ure 2 4 The circuit breaker CB101 remains equally effective at all input voltages NOMINAL AC SOURCE 115 208V 230V CONNECT LINKS 3 4 7 8 4 5 6 7 2 3 8 9 5 6 ATE FULL RACK PARTIAL TOP VIEW FRONT FIGURE 2 4 A C INPUT SOURCE VOLTAGE SELECTION ATE DMG FULL RACK SERIES ATE DMG 020613 2 4 2 5 2 6 COOLING
23. VOLT PROT TRIP returns 0 Related Commands VOLT PROT VOLT PROT TRIP See example Figure B 6 73 SOURce VOLTage PROTection TRIPped QUERY VOLT PROT TRIP Syntax Short Form SOUR VOLT PROT TRIP Long Form SOURce VOLTage PROTection TRIPped Return Value 0 or 1 Description Identifies whether overvoltage condition was detected Returns 0 if overvoltage protection tripped 1 if overvoltage protection not tripped Related Commands VOLT PROT VOLT PROT CLE See example Figure B 6 74 SOURce FUNCtion MODE QUERY FUNC MODE Syntax Short Form FUNC MODE Long Form SOURce FUNCtion MODE Return Value VOLT or CURR Description Identifies the operating mode of the power supply VOLT Constant Voltage mode CV CURR Constant Current mode CC See example Figure B 1 75 STATus OPERation CONDition QUERY STAT OPER COND Syntax Short Form STAT OPER COND Long Form STATus OPERation CONDition Return Value int value 0 to 1313 1 32 256 1024 Description Returns the value of the Operation Condition Register see Table B 2 The Operation Condition Register contains unlatched real time information about the operating conditions of the power supply Bit set to 1 function enabled active true bit reset to 0 function disabled inactive false See example Figure B 7 TABLE B 2 OPERATION CONDITION REGISTER OPERATION ENABLE REGISTER AND OPERATION EVENT REGISTER BITS COND
24. it must be unlocked either by a remote command see Appendix B PAR B 87 or cycling the power supply off then on ADJUSTING LCD CONTRAST With the power supply in command entry status press MENU key Press gt or key to increase or decrease contrast for optimum viewing The contrast can also be set directly by entering a number from 1 to 9 Press ENTER or CLEAR to exit menu ENABLING DISABLING AUDIBLE BEEPS With the power supply in command entry status press MENU key three times The top line indicates if the speaker is on or off the factory default setting is speaker on Enter 1 to enable the speaker or 0 to disable the speaker Press ENTER or CLEAR to exit menu ENABLING DISABLING DC OUTPUT POWER When the power supply is turned on the output is automatically enabled and the bottom line of the LCD gives voltage and current measurements at the output To disable the output press the red OUTPUT ON OFF key the lower line of the LCD reads Output oFF When the output is disabled voltage and current are programmed to zero the power supply remains in Command Entry status Pressing the OUTPUT ON OFF key again enables the output the previously pro grammed values of voltage and current are restored and the LCD displays the mode CV or CC and actual values of output voltage and current RESET RESET overrides all other local commands to reset the power supply to the power on defaults output enabled voltage mode output v
25. 3 4 11 INSTALLATION Refer to Figure 1 2 The Power Supply is intended to be rack mounted the 4 bottom feet must be removed For all installations into confined spaces care must be taken that the temperature immediately surrounding the unit does not exceed the maximum specified ambient temperature see Table 1 2 GROUNDING A C SAFETY GROUND The power supply is equipped with a 3 wire safety line cord and polarized plug The third green wire in the line cord is connected to the chassis and the case of the unit If a 2 terminal receptacle in combination with an adapter is used it is imperative that the chassis of the power supply be returned to a c ground with a separate lead A grounding terminal is provided at the rear barrier strip for this purpose ISOLATION FROM GROUND The d c output is isolated from the a c source and from any direct connection to chassis or ground The maximum output voltage that can be supported between either output terminals and chassis ground is 500V d c or peak Either side of the output may be grounded A resistor capacitor network is connected from the negative monitor terminal to the metal chas sis of the power supply If this internal network is not desired the connection to the chassis can be opened by removing the link 8 9 on TB201 see Figure 2 2 FAST MODE CONVERSION OF THE ATE POWER SUPPLY Power supplies designed to operate in a voltage as well as in a current stabilizing mode
26. 3dB for the Voltage Control Chan TABLE 1 4 OVERVOLTAGE OVERCURRENT SETTINGS MAXIMUM MAXIMUM MAXIMUM MAXIMUM MODEL NUMBER OVERVOLTAGE OVERCURRENT MODEL NUMBER OVERVOLTAGE OVERCURRENT SETTING SETTING SETTING SETTING ATE 6 100DMG 6 5V 110A ATE 55 20DMG 60V 22A ATE 15 50DMG 16 5V 55A ATE 75 15DMG 82V 16A ATE 25 40DMG 27V 44A ATE 100 10DMG 110V 11A ATE 36 30DMG 39V 33A ATE 150 7DMG 165V ATE DMG OPER 020613 TABLE 1 5 ATE STATIC SPECIFICATIONS OUTPUT EFFECTS VOLTAGE MODE OUTPUT EFFECTS CURRENT MODE OFFSETS 4 INFLUENCE QUANTITY TYPICAL MAXIMUM TYPICAL MAXIMUM Aljo SOURCE VOLTAGE min max lt 0 0005 Eo max lt 0 001 Eo max lt 0 002 10 max lt 0 005 Ig max lt 1uV 1nV LOAD no load full load lt 0 001 Eg max lt 0 002 max 0 5 mA 1 1 mA 1 E TIME 8 hour drift lt 0 005 max lt 0 01 Eo max lt 0 01 10 max 0 0296 max 20uV 1nV Temperature per C lt 0 005 max 0 0196 Eg max 0 0196 10 max 0 0296 lo max 20uV 2nV rms 0 1mV 0 3mV 0 0196 lo max 0 03976 lo max Ripple and noise 2 5 Slow mode 3 lt 1 lt 3mV 0 196 lo max 0 396 lo max rms 1mV 3m v 0 0 0196 l max 0 0396 lo max Ripple and noise 2 5 Fast mode a m 9 lt 10 lt 30mv 4 lt 0 1 lo
27. DMG Full Rack Series Front 2 2 ATE DMG Full Rack Series Rear 2 3 Location of Internal Controls terre eee eene Suet nu Eee SER 2 4 A C Input Source Voltage Selection ATE DMG Full Rack 2 5 LCD Power On Defaults 2 o 2 6 Required Steps for ATE Fast Mode 2 9 Typical Output Impedance vs Frequency Plot for Stabilized d c 3 2 Standard Jumper Link Connections for Local Front Panel Control of Output Voltage Output Current and VP Crowbar Level Slow 3 4 Load Connection Method I Local Error eene enne 3 5 Load Connection Method II Using Remote Error Sensing 3 6 Load Connection eeu Punta dun 3 6 LCD Power On Defaults gt err RE HD eei 3 11 A11 Assembly Connector and Pin 3 18 Tree Diagram of SCPI Commands Used with ATE DMG Power 3 25 Message Structure 3 26 Typical Example of ATE DMG Power Supply Program Us
28. For the Current Control Channel the PROGRAMMING TIME CONSTANT in Fast Mode is 25usec typical 50usec maximum 80usec for the ATE 325 0 8M The MAXIMUM RATE OF CHANGE that the power supply output can respond to in Slow Mode is given by the setting of the power supply s current control setting ILIM divided by the ATE output capacitor Co see Table 1 1 MAXIMUM RATE OF CHANGE juy Co 1 VOLTAGE RECOVERY FOR A STEP LOAD CURRENT IN FAST MODE The time required for the stabilized output voltage to recover to within 0 1 10mV for ATE 75 15DMG of the output voltage setting for a 10 to 100 step in rated load current is typically less than 50usec 100usec maximum 2 CURRENT RECOVERY FOR STEP LOAD VOLTAGE IN SLOW MODE The stabilized output current recovers from a step in load compliance voltage with an exponential response the time constant of which is determined by the load resistance and the tabulated output capacitance See Table 1 1 3 PROGRAMMING SPEED The speed with which the power supply output responds to external programming signals is determined by The PROGRAMMING TIME CONSTANT given in the slow mode by either the load resistance and the value of the output capacitor Co see Table 1 1 R Co or by the FEEDBACK TIME CONSTANT given by the product of the feedback capacitor and the feedback resistor T Rt Cf whichever is greater In the fast mode the PROGRAMMING TIME CONSTANT and bandwidth
29. LIST CURRent LEVel Return Value lt exp_value gt digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Returns current value Amps stored in indexed memory location selected by LIST IND Related Commands LIST IND LIST IND LIST CURR See example Figure B 4 ATE DMG 020613 B 7 26 SOUR LIST CURRent PROTect COMMAND LIST CURR PROT Syntax Short Form LISTTCURR PROT num value Long Form LIST CURRent PROTect num value num value digits with decimal point and Exponent Description Sets the current protection Amps value for the memory location selected by LIST IND If the value is out of the acceptable current range for the power supply model an error message 222 Data out of range is posted in the output queue The current value is stored in non volatile memory and is retained when the power supply is turned off Related Commands LIST IND LIST IND LIST CURR PROT See example Figure 4 LIST IND 21 Selects memory location 21 LIST IND Returns 21 LIST CURR 2 35E 1 Sets output current value of memory location 21 to 0 235A LIST CURR Returns 2 35E 1 LIST CURR PROT 0 67E 1 Sets current protection value of memory location 21 to 6 7A LIST CURR PROT Returns 0 67E 1 LIST VOLT PROT 2 77E 1 Sets voltage protection value of memory location 21 to 27 7V LIST VOLT PROT Returns 2 77E 1 LIST DWEL 0 6 Sets memory location 21 time value to 0 6 second During program execution af
30. LOCAL key Press to enable keypad If LCD reads KEYPAD LOCKED The LOCAL key is disabled and can only be unlocked by remote operation Press to restore the power on default values CV mode output voltage 0 3 4 7 mini _99 Command Entry output current minimum 1 2 of lOmax output enabled overvoltage and overcurrent values per associated instruction manual Also resets over voltage or overcurrent condition Press to enter Menu commands press repeatedly to scroll through Menu 1 3 4 4 functions 1 set LCD contrast 2 GPIB address 3 DCL Control 2 3 6 3 4 Speaker on off 5 Calibration password 6 previous calibration val 3 3 6 2 ues 7 factory calibration values 8 view firmware serial number 9 set 4 3 4 5 MENU Command Entry maximum voltage 10 set maximum current 11 protection delay Press 5 4 4 6 4 5 ENTER or RESET to exit Menu 7 4 6 8 2 8 9 10 3 4 11 11 3 4 10 CommandiEnt Press to set overvoltage protection value Data entry required to enter the 3 4 9 OV SET overvoltage protection value press ENTER to accept displayed value 7 Data Entry Press to enter number 7 3 4 1 2 Command Ent Press to set overcurrent protection value Data entry required to enter new 3 4 9 OC SET overcurrent protection value press ENTER to accept displayed value 8 Data Entry Press to enter number 8 3 4 1 2 Command Ent Press to enter Calibration status Requires password entry ins
31. STATUS Subsystem ended ed p eene 3 23 3 7 3 10 TRIGge r s bsystei cetero drei tubes 3 24 3 7 3 11 SOURce VOLTage and SOURce CURRent Subsystems 3 24 3 7 3 12 CALibrate Subsystem remedii eid eee 3 24 3 7 4 Program Message Structure enean 3 24 3 7 4 1 ae 3 26 3 7 4 2 Keyword Separator iisen orion rae r eei edt 3 27 3 7 4 3 Query Indicatore mts meets 3 27 3 7 4 4 E E hana te 3 27 3 7 4 5 5 3 27 3 7 4 6 Message Unit Separator 1 doe ue n tesque ERO ete Ld ein rU de dp pes qp 3 27 3 7 4 7 Root Specifier x ciere ete vr e e pete e dee ee ee ode ee e 3 27 3 7 4 8 Message ine Epica hee Lp he 3 28 3 7 5 Understanding The Command 5 3 28 3 7 6 Program Message Syntax 3 29 3 7 7 eL ederet E noce epe o t eee 3 29 ii ATE DMG020613 TABLE OF CONTENTS SECTION PAGE SECTION 4 CALIBRATION 4 1 Re sensi 4 1 4 2 Equipment Required
32. The power transistors and rectifiers in the ATE power supplies are maintained within their oper ating temperature range by means of special heat sink assemblies cooled by internal fans SIDE PANEL OPENINGS AND THE TOP OF THE CASE MUST BE KEPT CLEAR FROM OBSTRUCTIONS TO INSURE PROPER AIR CIRCULATION Periodic cleaning of the interior of the power supply is recommended If the power supply is rack mounted or installed into con fined spaces care must be taken that the ambient temperature the temperature immediately surrounding the power supply does not rise above the limit specified refer to Table 1 2 PRELIMINARY OPERATIONAL CHECK A simple operational check after unpacking and before equipment installation is advisable to ascertain whether the power supply has suffered damage resulting from shipping Refer to Figures 2 1 and 2 2 for location of operating controls and electrical connections Tables 2 1 and 3 1 explain the functions of operating controls indicators and keypad keys respectively 1 With POWER switch set to off position connect the power supply to source power 2 With no load connected set POWER switch to the ON position Each time the unit is turned on and internal self test is performed If the test is successful the indications of step 3 are visible 3 The alphanumeric display LCD indicates the model and GPIB address After approximately 2 seconds the display changes to the power on default values Local mode Cons
33. Value exp value digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Returns value representing voltage value to be programmed by TRG command established by VOLT TRIG command See example Figure B 1 66 SOURce VOLTage LIMit HIGH COMMAND VOLT LIM HIGH Syntax Short Form SOUR VOLT LIM HIGH exp value Long Form SOURce VOLTage LIMit HIGH exp value lt exp_value gt digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Sets voltage limit for power supply output If the value is out of the acceptable voltage range for the power supply model error message 222 Data out of range is posted in the output queue If the user tries to set an output voltage level larger than the VOLT LIM HIGH setting a value corresponding to the voltage limit will be programmed and error message 301 Value bigger than limit is posted in the output queue NOTE If the voltage limit is changed any previously established trigger levels higher than the new limit must be reprogrammed to be lower than the new limit otherwise triggers will cause the output to exceed the new limit Once the limit is established the unit will not accept trigger values higher than the programmed limit Related Commands VOLT See example Figure B 6 B 67 SOURce VOLTage LIMit HIGH QUERY VOLT LIM HIGH Syntax Short Form SOUR VOLT LIM HIGH Long Form SOURce VOLTage LIMit HIGH Return Value lt exp_value gt
34. a c source and operation may commence ATE DMG 020613 FIGURE 3 3 LOAD CONNECTION METHOD LOCAL ERROR SENSING 3 2 3 LOAD CONNECTION METHOD Il REMOTE ERROR SENSING To avoid excessive output effects at remote loads error sensing must be used A twisted shielded pair of wire from the sensing terminals directly to the load will compensate for load wire voltage drops up to 0 5 volt per wire refer to Figure 3 4 Observe polarities The negative sens ing wire must go to the negative load wire and the positive sensing wire goes to the positive load wire NOTE For long wire runs twisting each sensing wire with its associated load wire may give improved results in some cases ATTENTION When using remote error sensing with large capacitive loads and long load and sensing wires low frequency oscillations may be observed at the load To eliminate the problem the FEEDBACK CAPACITOR should be disconnected from the OUTPUT SENSING terminal and recon nected to the OUTPUT MONITOR terminal Remove jumper 1 2 on the REAR PROGRAMMING CONNECTOR Connect a short wire from pin 2 to the REAR BARRIER STRIP TR201 3 This method of load interconnection is suitable for loads which do not require rapid changes in voltage or current or for programming with gradually changing waveforms sine wave triangular wave shapes etc See PAR 3 2 4 for load connections suitable for rapid step changes
35. alternative is to use increase key decrease to change the output by the minimum increment lt 0 025 of Egmax for volt age lt 0 025 of Igmax for current In CC mode these keys control output current in CV mode they control output voltage The key has no effect after the maximum or programmed limit has been reached The key has no effect when the value is 0 If the value entered exceeds the maximum setting the LCD bottom line flashes VsetMAX nn V Or IsetMAX n n A where n n is the maximum setting see PAR 3 4 11 The unit returns to waiting for a value that does not exceed the maximum SETTING OVERVOLTAGE OR OVERCURRENT PROTECTION With the power supply in command entry status press OV SET overvoltage or OC SET overcurrent to put the power supply in data entry status The lower right side of the LCD shows the programmed setting in effect when the key is pressed Press ENTER or CLEAR to exit without changing setting Enter new value and press ENTER to accept new setting the key erases data just entered or CLEAR to exit without changing setting To recover from over voltage or overcurrent condition press RESET this restores the power on defaults see PAR 3 4 7 Table 1 4 lists the maximum settings for overvoltage and overcurrent protection Overvoltage and overcurrent settings are recommended to be left set to the factory default values or should be at least 1 higher than the expected output volt
36. be set The questionable summary bit is the log ical OR of all the enabled bits in the Questionable Event register Bit set to 1 function enabled active true bit reset to 0 function disabled inactive false See example Figure B 7 B 83 STATus QUEStionable ENABle QUERY STAT QUES ENAB Syntax Short Form STAT QUES ENAB Long Form STATus QUESionable ENABle Return Value int value actual register value Description Reads Questionable Condition Enable Register see Table B 3 Power supply returns value of Questionable Condition Enable Register indicating which conditions are being monitored Bit set to 1 function enabled active true bit reset to 0 function disabled inactive false Related Com mands STAT QUES See example Figure B 7 B 84 SYSTem ERRor NEXT QUERY SYST ERR Syntax Short Form SYST ERR NEXT Long Form SYSTem ERRor NEXT Return Value int value string Description Posts error messages to the output queue Returns the next error number followed by its corre sponding error message string from the instrument error queue The error queue is a FIFO first in first out buffer that stores errors as they occur As it is read each error is removed from the queue and the next error message is made available When all errors have been read the query returns 0 No error If more than 15 errors are accumulated it will overflow The oldest errors stay in the queue but the most rec
37. changed by the user CURR PROT MIN returns the minimum current protection value always 0 See example Figure B 5 B 58 SOURce CURRent PROTection CLEar COMMAND CURR PROT CLE Syntax Short Form SOUR CURR PROT CLE Long Form SOURce CURRent PROTection CLEar Description Clears overcurrent condition Output programmed to OV current limit programmed to small value approximately 1 of full scale current rating Overcurrent Protection Tripped is reset so that CURR PROT TRIP returns 0 Related Commands CURR PROT CURR PROT TRIP See exam ple Figure B 5 B 59 SOURce CURRent PROTection TRIPped QUERY CURR PROT TRIP Syntax Short Form SOUR CURR PROT TRIP Long Form SOURce CURRent PROTection TRIPped Return Value 0 or 1 Description Identifies whether overcurrent condition was detected 0 if overcurrent protection tripped 1 if overcurrent protection not tripped Related Commands CURR PROT CURR PROT CLE See exam ple Figure B 5 60 SOURce CURRent LEVel TRIGgered AMPlitude COMMAND CURR TRIG Syntax Short Form SOUR CURR LEV TRIGEAMP lt exp_value gt Long Form SOURce CURRent LEVel TRIGgered AMPlitude exp value lt exp_value gt digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Programs current value to be transferred to output by TRG commands Actual output current will depend on load conditions If the value exceeds the maximum for the model being programmed err
38. in the load or in programming ATE DMG 020613 3 5 oc OUTPUT 201 REMOVE LINKS 2 3 AND 5 6 FIGURE 3 4 LOAD CONNECTION METHOD II USING REMOTE ERROR SENSING 3 2 4 LOAD CONNECTION METHOD This method is suitable if step changes in the load are expected if for example the load is rap idly changing in value and maximum dynamic performance is expected directly at the load ter minals In these cases the output capacitor is disconnected at the power supply and brought with a heavy twisted wire pair directly to the remote load refer to Figure 3 5 DC OUTPUT T8 201 a 3 9 M GRO M s ico GROUNDING REMOVE LINKS 1 2 3 AND 5 6 7 ON 201 FIGURE 3 5 LOAD CONNECTION METHOD III 3 6 ATE DMG 020613 3 3 3 3 1 3 4 OVERVOLTAGE CROWBAR SETUP AND CHECK The overvoltage crowbar circuit protects the load from momentary or long term overvoltages The crowbar SCR conducts across the power supply output and the A C POWER SWITCH CIRCUIT BREAKER is tripped if such overvoltages occur The setting of the front panel LEVEL control determines the threshold between the actual operating voltage of the power supply and the level at which the crowbar circuit will be activated The LEVEL control can be set from 3 volts to 110 of the rated output voltage The LEVEL cont
39. is waiting for a command to be entered data will not be accepted accompanied by brief audible buzz The LCD indi cates the actual voltage and current at the output terminals When the output is disabled LCD bottom line reads Output OFF the power supply is in Command entry status even though the blinking colon is not visible NOTE The blinking colon is indicated by in this manual DATA ENTRY STATUS Indicated by blinking equal sign on bottom line of LCD the power supply is waiting for data to be entered A command will not be accepted accompanied by brief audible buzz Enter new value the key erases data entered Press ENTER to accept new setting or CLEAR to exit without changing setting NOTE The blinking equal sign is indicated by in this manual DISPLAY LCD The LCD is a 2 line display with a capacity of 16 characters per line The information is gener ally arranged as follows information that does not follow this format is self explanatory Top left Loc Rem Remote Local Status Topright CV CC Constant voltage mode constant current mode Bottom left In command entry n nnnV Output voltage In data entry parameter e g OVset if OV SET key was pressed Bottom middle Command entry status Data entry status Bottom right In command entry n nnnA Output current In data entry n nnn Present value of parameter replaced by data entered KEYPAD FUNCTIONS Keypad functions are listed in Tabl
40. memory location 33 Returns 129 128 1 power on bit 7 1 operation complete bit 1 1 Returns 0 event status register cleared by prior 5 2 Sets output voltage to 15V output current to 5A puts 1 on output bus when command operations are complete Values in memory location 33 recalled 21V 3A Power supply reset to power on default state When ESB or QUES bits are set Table A 3 the Request for Service bit will be set Returns the value of the mask 40 For example the Power supply responds with 96 64 32 if MSS and the Event Status Byte Table A 3 summary bit have been set The power supply returns 00 if no bits have been set Power supply voltage commanded to 25V Programs power supply voltage to 12V when TRG received Trigger event is initialized Power supply reverts to commanded output voltage of 12V Power supply executes self test and responds with 0 if test completed successfully with 1 if test failed A 13 SRE SERVICE REQUEST ENABLE COMMAND SRE lt integer gt where integer value from 0 255 per Table 3 except bit 6 cannot be pro determines which events of the Status Byte Register are summed into the MSS Master Status Sum mary and RQS Request for Service bits RQS is the service request bit that is cleared by a serial poll while MSS is not cleared when read A 1 1 set enable 0 reset disable in any Service Request Enable register bit position enables th
41. often represent a compromise between the conflicting requirements of a good voltage and a good current source A good voltage source must have low output impedance good output voltage stability and good dynamic stability in the presence of loads with capacitive and or inductive content It achieves these design goals by relying to a great extent upon a large output capacitor having a very low terminal impedance large energy storing ability and great resistance to rapid voltage changes Unfortunately the requirements for a good current source are quite opposite to that of the volt age source described above A current source should have high output impedance and its ter minal voltage must be able to assume rapidly any value as may be needed to keep the output current at the predetermined level while the load is changing To satisfy these conflicting requirements the ATE power supply was designed for quick manual change over from the slow mode to the fast mode of operation In the slow mode the ATE power supply approaches an ideal voltage source Heavy output and feedback capacitors pro ATE DMG 020613 2 7 2 7 1 2 7 2 2 7 3 2 7 4 2 8 vide for low output noise excellent voltage stability and good transient response In the fast mode the output and main feedback capacitors are completely removed thereby providing the characteristics of a wide band amplifier ideal for applications requiring a current stab
42. omitted or must be specified completely long form e g INSTrument long form has the same effect as INST short form Commands queries may be given in upper lower case long form e g SoUrCe is allowed Text shown between brackets is optional e g SOUR VOLT LEV TRIG has the same effect as VOLT TRIG 3 7 7 SCPI PROGRAM EXAMPLES Refer to Appendix B Figures B 1 through B 8 for examples illustrating the use of SCPI com mands Figure 3 10 is an example of a program using SCPI commands to program the ATE DMG Power Supply The program illustrated is for a configuration using an IBM PC or compatible with a National Instruments GPIB interface card It will be necessary to consult the manufacturer s data to achieve comparable functions with an interface card from a different manufacturer This program sets output voltage Voltage mode or voltage limit Current mode to 5V and current limit Voltage mode or output current Current mode to 1A then reads the measured actual voltage and current then prints the measurements ATE DMG 020613 3 29 f CR kkk kk ERR KEKE RE REE KEKE k k k RE RE kk kkk kk kkk k kkk kkk kkk fie Sample Program For KEPCO power supply using National Instruments GPIB interface card IBM compatible computer he ke he e KEKE KK REE EE ERE REE KEKE kc kc kckckckckockckckckokok include lt stdio h gt include d
43. operation is recommended for applications demanding a constant voltage source Fast mode operation is best if the output voltage must change rapidly either in response to an exter nal programming signal or if the ATE DMG is used as a current stabilizer The ATE DMG power supply is delivered for slow mode operation See Section 2 par 2 7 for converting the ATE DMG power supply to fast mode operation A continuously adjustable overvoltage protection circuit is a built in feature The trigger point of the overvoltage protector may be set or checked under actual operating conditions by the front panel accessible setup controls refer to Section 2 of this manual Power transistors and drivers on all ATE DMG designs are mounted onto highly efficient pat ented heat sink assemblies which are cooled by low noise fans The ATE DMG main chassis assemblies as well as the wraparound covers are constructed from cold rolled steel The front panels are made from aluminum refer to the Mechanical Outline Drawing Figure 1 2 SPECIFICATIONS Table 1 1 lists the output parameters applicable to individual models Table 1 2 lists general specifications applicable to all full rack models except where otherwise noted Table 1 3 lists dynamic specifications and Table 1 5 lists static specifications Mechanical specifications are presented in the mechanical outline drawing Figure 1 2 LOCAL CONTROL Front panel keypad entries are utilized
44. parameters power supply state status or error conditions COMMON COMMANDS QUERIES Common commands and queries are defined by the IEEE 488 2 standard to perform overall power supply functions such as identification status or synchronization unrelated to specific power supply operation such as setting voltage current Common commands and queries are preceded by an asterisk and are defined and explained in Appendix A see Table 4 4 Refer also to syntax considerations PARs 3 4 3 through 3 4 6 SCPI SUBSYSTEM COMMAND QUERY STRUCTURE Subsystem commands queries are related to specific power supply functions such as setting output voltage current limit etc Figure 3 8 is a tree diagram illustrating the structure of SCPI ATE DMG 020613 3 7 3 1 3 7 3 2 3 7 3 3 3 7 3 4 3 7 3 5 3 7 3 6 3 7 3 7 3 7 3 8 3 7 3 9 subsystem commands used in the ATE DMG Power Supply with the root at the left side and specific commands forming the branches The following paragraphs introduce the subsystems subsystem commands are defined and explained in Appendix B ABORT SUBSYSTEM This subsystem allows pending trigger levels to be cancelled DIAG SUBSYSTEM This subsystem is used to enable disable external analog control of the output DISPLAY SUBSYSTEM This subsystem controls the second line of the LCD The first line will always display the LOCal or REMote operation status and the constant Voltage CV or constant
45. prior to calibrating the ATE DMG power supply CALIBRATION PROCEDURES During voltage calibration the voltage overvoltage and voltage readback are calibrated and during current calibration the current overcurrent and current readback are calibrated The nor mal procedure is to calibrate voltage first and then current However you do not have to do a complete calibration each time If required you may calibrate only the voltage or the current and then proceed to saving the calibration results For either voltage or current calibration BOTH zero AND full scale calibrations must be performed ATE DMG 020613 4 1 4 3 1 4 3 2 4 2 For voltage calibration all loads must be disconnected and the sense terminals connected to the corresponding output terminals The digital voltmeter will be connected to the output of the power supply For current calibration after disconnecting all loads an appropriate shunt resistor will be connected across output terminals and the digital voltmeter will be connected across the sense terminals of the shunt resistor NOTES Keys with dual functions are labeled with both a command and a number The com mand label is referred to when the unit is in command entry status the number is referred to when the unit is in data entry status 1 Adjust Crowbar LEVEL control fully clockwise 2 With the power supply in command entry status press CALIB key power supply enters Calibration mode data ent
46. selected by LIST IND A value of 0 means that this memory location will be skipped during the RUN command LOCal mode The time value is stored in non volatile memory and is retained when the power supply is turned off Related Commands LIST IND LIST IND LIST DWEL LIST SEQ See example Figure B 4 B 8 ATE DMG 020613 B 29 SOUR LIST DWELI QUERY LIST DWEL Syntax Short Form LIST DWEL Long Form LIST DWELI Return Value lt value gt 0 01 to 300 B 30 SOUR LIST INDex COMMAND LIST IND Syntax Short Form LIST IND int value from 1 to 40 Long Form LIST INDex int value from 1 to 40 Description Selects one 40 memory locations for viewing or modification of parameter selected by subse quent LIST CURR LIST CURR PROT LIST VOLT LIST VOLT PROT commands or queries The index value the selected memory location is stored in non volatile memory and is retained when the power supply is turned off Related Commands LIST IND See example Figure B 4 B 31 SOUR LIST INDex QUERY LIST IND Syntax Short Form LIST IND Long Form LIST INDex Return Value lt int_value gt 1 to 40 Description Returns index value Identifies which one 40 memory locations has been selected for viewing or modification by subsequent LIST CURR LIST CURR PROT LIST VOLT LIST VOLT PROT commands or queries Related Commands LIST IND See example Figure B 4 B 32 SOUR LIST SEQuence NEXT COMMAND LIST SEQ NEXT Syntax Short F
47. sequence number is stored in non volatile memory and is retained when the power supply is turned off Related Commands LIST SEQ STAR See exam ple Figure B 4 B 35 SOUR LIST SEQuence STARt QUERY LIST SEQ STAR Syntax Short Form LIST SEQ STAR Long Form LIST SEQuence STARt Return Value lt int_value between 1 and 40 Description Identifies the starting address for program execution Returns the starting sequence location set by LIST SEQ STAR command Related Commands LIST SEQ STAR See example Figure B 4 ATE DMG 020613 B 9 36 SOUR LIST VOLTage COMMAND LIST VOLT Syntax Short Form LIST VOLT LEV exp value Long Form LIST VOLTage LEVel exp value exp value digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Sets the voltage value for the memory location selected by LIST IND If the value is out of the acceptable voltage range for the power supply model an error message 222 Data out of range is posted in the output queue The voltage value is stored in non volatile memory and is retained when the power supply is turned off Related Commands LIST IND LIST IND LIST IVOLT See example Figure B 4 B 37 SOUR LIST VOLTage QUERY LIST VOLT Syntax Short Form LISTVOLT LEV Long Form LIST VOLTage LEVel Return Value exp value digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Returns voltage value stored in indexed memory lo
48. the current setting either DCL OUTP OV or DCL OUTP UNCHNG Depress 1 for output unchanged mode where the output is unaffected by DCL depress 0 for output OV mode where DCL sets the output to 0 volts CHANGING THE GPIB ADDRESS When the power supply is in local mode command entry status press MENU key twice The top line of the LCD indicates the current GPIB address Enter new value and press ENTER to accept new setting or CLEAR to exit without changing setting ENABLING REMOTE ANALOG CONTROL Before using the remote analog control feature see PAR 3 5 which allows an external refer ence to control output voltage and current the feature must first be enabled either from the front panel see PAR 3 4 14 or by using the following commands and queries via the remote interface DIAG EXT see PAR B 12 DIAG EXT see PAR B 13 CURR MODE see PAR B 54 CURR MODE see PAR B 55 VOLT MODE See PAR B 68 and VOLT MODE See PAR B 69 PROGRAMMING TECHNIQUES TO OPTIMIZE PERFORMANCE Kepco s auto crossover digital supplies can operate in either voltage mode with current limit or current mode with voltage limit The operating mode is determined by the voltage and current commands received as well as the load Each time voltage and current commands are received the unit must evaluate the commands and the load conditions to determine the proper operating mode Reducing the number of times this evaluation must be made is des
49. to a specific circuit under test Changing the maximum values of the ATE 25 40DMG to 10V and 1A effectively makes the unit a 10V 1A power supply With the power supply in command entry status press MENU key nine voltage or ten cur rent times The LCD reads New MAXIMUM Vset or Iset nn where nn is the maximum value setting to be changed Press ENTER or CLEAR to exit menu without changing setting Press number keys to enter new value and press ENTER Press ENTER again to exit the menu and return to command status If a value is entered that is higher than the rated maximum for the power supply the bottom line of the LCD flashes Vset or Iset MAX nn where is the rated maximum of the power sup ply The unit remains in data entry status waiting for a value equal to or less than the rated maximum Press CLEAR to exit without changing the value Once the maximum value has been changed if a value higher than the new maximum is attempted to be programmed the LCD flashes Vset or Iset MAX nn where nn is the pro grammed maximum NOTES 1 If the programmed output value is higher than the new maximum value established with the MENU key the output will be limited to the new maximum value 2 The front panel CURRENT control provides secondary limiting To disable limiting from the CURRENT control rotate fully counterclockwise STORING POWER SUPPLY OUTPUT SETTINGS The programmed settings of voltage current overvoltage prot
50. true STAT OPER Returns 1057 e g indicating that since the last reading of the Operation Event Register the power supply has entered Constant Current mode the Wait Trigger was set STAT OPER Returns 0 indicating no changes since previous reading of the Operation Event register STAT QUES Returns 0 no questionable conditions occurred since previous reading SHORT OUTPUT OVERCURRENT CONDITION OCCURS STAT QUES Returns 2 overcurrent protection tripped since the last STAT QUES query STAT QUES COND Returns 2 Power supply still in overcurrent protection state STAT QUES Returns 0 Register cleared by previous STAT QUES7 STAT QUES COND Returns 2 Power supply still in overcurrent protection state REMOVE SHORT FROM OUTPUT CURR PROT CLE Overcurrent condition cleared STAT QUES COND Returns 0 register cleared by CURR PROT CLE SYST ERR Power supply returns 0 No error message FIGURE B 7 USING STATUS COMMANDS AND QUERIES B 18 ATE DMG 020613 80 STATus QUEStionable EVENt QUERY STAT QUES Syntax Short Form STAT QUES EVEN Long Form STATus QUEStionable EVENT Return Value lt int_value gt actual register value Description Indicates questionable events that occurred since previous STAT QUES query Returns the value of the Questionable Event register see Table B 3 The Questionable Event register is a read only register which holds latches all events Reading the Questi
51. used 3 4 2 TURNING THE POWER SUPPLY ON 3 10 Pressing the upper half ofthe POWER switch turns the power supply on pressing the lower half of the switch O shuts the power supply off When the power supply is turned on the LCD first shows the power supply type e g ATE25 40 GPIB addr nn where the GPIB address factory default GPIB address 6 The LCD then shows the power on defaults see Figure 3 6 The defaults are output enabled voltage mode output voltage set to zero ATE DMG 020613 3 4 3 3 4 4 3 4 5 3 4 6 3 4 7 output current set to a minimum value 1 2 of l max Power on defaults also include setting maximum values for overcurrent and overvoltage protection indicated in Table 1 4 NOTE indicates blinking colon Command Entry status indicates blinking equal sign 7 Data Entry status FIGURE 3 6 LCD POWER ON DEFAULTS SETTING LOCAL MODE When the power supply is turned on it is automatically set to Local mode If remote commands are accepted over the GPIB bus the power supply will automatically go into Remote mode Rem at the upper left of the LCD Pressing the LOCAL key will restore Local mode When in Remote mode all keys except LOCAL are disabled The ATE DMG incorporates a keypad lockout command which allows the LOCAL key to be disabled during remote operation preventing inadvertent setting of the power supply to Local mode If the keypad is locked
52. values pres ently being displayed on the second line of the LCD Related Commands DISP MODE DISP TEXT RST See example Figure B 3 ATE DMG 020613 B 20 INITiate IMMediate COMMAND INIT IMM Syntax Short Form INIT IMM Long Form INITiate IMMediate Description Enables a single trigger If INIT CONT is OFF then INIT IMM arms the trigger system for a single trigger If INIT CONT is ON then the trigger system is continuously armed and INIT IMM is redun dant This command enables a single trigger A GPIB GET TRG or command completes the sequence Upon receipt of the GET or TRG command the power supply will return to the pro grammed values of voltage and current established by the VOLT TRIG and CURR TRIG commands After a GPIB lt GET gt or TRG command has been received subsequent GPIB lt GET gt TRG com mands have no effect unless preceded by INIT or INIT CONT ON Related Commands GET RST TRG See example Figure B 1 21 INITiate CONTinuous COMMAND INIT CONT Syntax Short Form INIT CONT ON OFF or 1 0 1 on 0 off Long Form INITiate CONTinuous ON OFF or 1 0 1 on 0 off Description ON enables continuous triggers OFF disables continuous triggers INIT CONT is OFF then INIT IMM arms the trigger system for a single trigger If INIT CONT is ON then the trigger system is continuously armed and INIT IMM is redundant Executing
53. 0DMG 1 000V if 0 01 Ohm resistor 0 500V if 0 05 Ohm resistor ATE 15 70DMG 0 700V ATE 25 40DMG 1 600V ATE 36 30DMG 1 500V ATE 55 20DMG 1 000V ATE 75 15DMG 1 500V ATE 100 10DMG 1 000V ATE 150 7DMG 1 400V 4 Press ENTER when complete 4 4 CHANGING THE CALIBRATION PASSWORD The 4 digit password is required for to enter calibration mode The factory default passwords are listed in Table 4 2 TABLE 4 2 FACTORY DEFAULT CALIBRATION PASSWORDS MODEL PASSWORD ATE 6 100DMG 6100 ATE 15 50DMG 1550 ATE 25 40DMG 2540 ATE 36 30DMG 3630 ATE 55 20DMG 5520 ATE 75 15DMG 7515 ATE 100 10DMG 1001 ATE 150 7DMG 1507 ATE DMG 020613 4 3 If the unit is not in command entry status press CLEAR or RESET to put the unit in com mand entry status Press MENU key five times LCD reads Change Passw OldPass Enter the old password and press ENTER Then enter the new 4 digit Password and press ENTER The new password is accepted and the LCD shows the next Menu screen GoTo Previous CALIB 1 Yes Press CLEAR to exit the Menu press 1 to restore the previous calibration values see PAR 4 5 or MENU for additional menu screens 4 5 RESTORING PREVIOUS CALIBRATION VALUES Each time the unit is calibrated the previous calibration values are retained in non volatile mem ory If it is determined that a new calibration is erroneous the previous calibration va
54. 2 Q NOT USED 110 22 2 NOT USED NOT USED 110 24 2 NOT USED O NOT USED SLIDES NIT MUST BE SUPPORTED MILLIMETERS HOLES 1 4 FOR ONG BY A RIGID PLATFORM FIGURE 1 2 MECHANICAL OUTLINE DRAWING SHEET 2 OF 2 1 8 ATE DMG OPER 020613 SECTION 2 INSTALLATION 2 1 UNPACKING AND INSPECTION This instrument has been thoroughly inspected and tested prior to packing and is ready for operation After carefully unpacking inspect for shipping damage before attempting to operate Perform the preliminary operational check as outlined in PAR 2 5 below If any indication of damage is found file an immediate claim with the responsible transport service 2 2 TERMINATIONS AND CONTROLS a Front Panel Refer to Table 2 1 and Figure 2 1 b Rear panel Refer to Table 2 4 and Figure 2 2 c Internal Controls See Table 2 3 and Figure 2 3 TABLE 2 1 FRONT PANEL CONTROLS INDICATORS AND TERMINATIONS CONTROL OR TERMINATION FUNCTION 1 A C Power switch circuit breaker Serves as a c power switch and turns a c power off upon overload or over voltage hardware induced 2 Liquid Crystal Display LCD 2 x 16 character display with LED backlight Shows voltage current mode settings menu program etc See PAR 3 4 1 3 for details 3 V Mode indicator Energizes in Voltage Mode 4 I Mode Indicator Energizes
55. 6 CROWBAR CIRCUIT An overvoltage crowbar circuit protects the load from momentary or long term overvoltages The crowbar conducts across the power supply output and the AC POWER SWITCH CIRCUIT BREAKER is tripped if such overvoltage occurs The setting of the front panel LEVEL control determines the threshold between the operating voltage of the power supply and the level at which the crowbar circuit will be activated The crowbar level is set from the front panel refer to PAR 3 3 This feature is used as a hardware backup protection in case of overvoltage NON VOLATILE STORAGE OF PROGRAMMED SEQUENCES OR ACTIVE SETTINGS The ATE DMG Power Supply contains 40 memory locations that can be used either to prepro gram a sequence of output values or to store the active settings For programming sequences each memory location accommodates six parameters output voltage output current Overvolt age Overcurrent Time how long the parameters are in effect and the next address in the sequence Values are stored in the non volatile memory and are retained when the unit is turned off Refer to PAR 3 4 12 The same 40 memory locations are also available to save the active programmed settings V SET I SET SET and OC SET The saved setting can be recalled by specifying the memory location USER DEFINED VOLTAGE CURRENT LIMITS The ATE DMG output can be programmed not to exceed user defined values For example the ATE 25 40DMG which has a maxim
56. 7 4 6 3 7 4 7 You must use the rules above when using keywords Using an arbitrary short form such as ENABL for ENAB ENABLE or IMME for IMM IMMEDIATE will result in an error Regardless of which form chosen you must include all the letters required by that form To identify the short form and long form in this manual keywords are written in upper case let ters to represent the short form followed by lower case letters indicating the long form IMMediate EVENt and OUTPut The parser however is not sensitive to case e g outp OutP OUTPUt ouTPut or OUTp are all valid KEYWORD SEPARATOR If a command has two or more keywords adjacent keywords must be separated by a colon which acts as the keyword separator CURR LEV TRIG The colon can also act as a root specifier PAR 3 7 4 7 QUERY INDICATOR The question mark following a keyword is a query indicator This changes the command into a query If there is more than one keyword in the command the query indicator follows the last keyword e g VOLT and MEAS CURR DATA Some commands require data to accompany the keyword either in the form of a numeric value or character string Data always follows the last keyword of a command or query e g VOLT LEV TRIG 14 or SOUR VOLT MAX DATA SEPARATOR Data must be separated from the last keyword by a space e g VOLT LEV TRIG 14 SOUR VOLT MAX MESSAGE UNIT SEPARATOR When two or more message uni
57. 9 TST 17 RCL A 10 2 CLS CLEAR STATUS COMMAND CLS Syntax CLS Description Clears status data Clears the error queue of the instrument It also clears the following registers without affecting the corresponding Enable Registers Standard Event Status Register ESR Opera tion Status Event Register Questionable Status Event Register and Status Byte Register STB Related commands OPC OPC See example Figure 1 STANDARD EVENT STATUS ENABLE COMMAND ESE Syntax lt integer gt where lt integer gt positive whole number 0 to 255 per Table 2 Default Value 0 Description This command programs the standard Event Status Enable register bits The contents function as a mask to determine which events of the Event Status Register ESR are allowed to set the ESB Event Summary Bit of the Status Byte Register Enables the Standard events to be summarized in the Status Byte register 1 set enable function 0 reset disable function All of the enabled events of the standard Event Status Enable register are logically ORed to cause ESB bit 5 of the Sta tus Byte Register to be set 1 set enable 0 reset disable See example Figure A 1 TABLE A 2 STANDARD EVENT STATUS ENABLE REGISTER AND ATE DMG 020613 STANDARD EVENT STATUS REGISTER BITS PON NU CME EXE DDE QUE OPC Power On Not Used Command Error Execution Error Device Dependent Error Query Error Operatio
58. CAL VOLT CAL CURR CAL SAVE See example Figure B 2 12 DIAG EXT COMMAND DIAG EXT Syntax Description Short Form DIAG EXT value Long Form DIAG EXT value where value xxugx DIAG EXT 01 initializes external analog control and 03 sets VOLT MODE and CURR MODE to EXTERNAL DIAG EXT 00 turns off the external analog control feature Setting is stored in NVRAM and retained upon subsequent power up B 13 DIAG EXT QUERY DIAG EXT Syntax Short Form DIAG EXT Long Form DIAG EXT Return Value 0 01 Or Description Returns 00 when external analog control feature is disabled Returns 01 when external analog control feature is enabled Returns 03 when external analog control feature is enabled upon power up 14 DISPlay CONTrast COMMAND DISP CONT Syntax Short Form DISP CONT num value 0 to 1 Long Form DISPlay CONTrast num value 0 0 to 1 0 Description Sets the contrast of the front panel LCD The contrast value from 0 1 to 0 9 is stored in the non ATE DMG 020613 volatile memory and is retained when the power supply is turned off A contrast value of 0 is best when looking up at the display 1 is best when looking down at the display Values in between provide adjustment for optimum viewing Setting the values to 0 1 or 0 9 are not reported back and are rounded to 0 or 1 respectively Related Commands DISP CONT See example Figure B 3 B 5 DISP CONT 0 9 Set
59. CALibrate SAVE Saves computed calibration values in non volatile memory The Analog to Digital A D converter is read to establish the final values of the calibration state For example if VOLT MAX was the last cal ibration state the voltage A D converter is read and the volts per step multiplier is calculated The volt age per step for the voltage Digital to Analog D A converter is also calculated and the non volatile memory is updated from the volatile calibration constants Previous values are not lost and can be restored using Local mode see PAR 4 5 This command should be the last command before exiting Calibrate status CAL STAT CAL PASS CAL VOLT CAL CURR CAL ZERO CAL SAVE See example Figure B 2 7 CALibrate STATus COMMAND CAL STAT Syntax Description Short Form CAL STAT boolean password Long Form CALibrate STATus lt boolean gt password where boolean 0 or OFF 1 or ON password 4 digits required if lt boolean 1 or ON Sets the power supply to Calibrate status boolean 1 or ON causes power supply to enter Cali brate status boolean 0 or OFF causes power supply to exit Calibrate status Upon entering Cali brate status the current calibration constants are stored in the volatile memory If the state is O the non volatile calibration constants are supplied to the ASC working calibration password 4 digits required to enter Calibrate status If the wrong password is entered error mes
60. Character string Identifies the instrument This query requests identification The power supply returns a string which contains the manufacturer name the model the serial number and the firmware level The character string contains the following fields lt Manufacturer gt lt Model gt lt Serial Number gt lt Firmware revision gt where lt Manufacturer gt KEPCO lt Model gt VV is Vmax AA is Imax e g 100 10 or 6 100 lt Serial Number gt MM DD YY SSS MM month DD day YY year SSS serial number in that day lt Firmware revision gt n m n m revision e g 1 0 See example Figure A 1 7 OPC OPERATION COMPLETE COMMAND OPC Syntax Description OPC Causes power supply to set status bit 0 Operation Complete when pending operations are complete This command sets Standard Event Status Register bit see Table A 2 to 1 when all pre vious commands have been executed and changes in output level have been completed This com mand does not prevent processing of subsequent commands but bit will not be set until all pending operations are completed 1 set enable function 0 reset disable function See example Fig ure A 1 As an example the controller sends command s then sends OPC If controller then sends ESR the power supply responds with either a 0 if the power supply is busy executing the pro grammed commands or a 1 if the previously programm
61. Current functioning mode CC INITIATE SUBSYSTEM This subsystem enables the trigger system When a trigger is enabled the triggering action will occur upon receipt of a GPIB lt GET gt TRG or TRIGger command If a trigger circuit is not enabled all trigger commands are ignored LIST SUBSYSTEM The LIST subsystem is represented by the 40 memory locations groups of settings which are stored in the nonvolatile memory Each setting contains values for Current Voltage Overcur rent Overvoltage Next memory location and Time The range for the first four values is the maximum available range for the specific power supply The Next memory location is the address of the next group of settings and is between 1 and 40 A value of 0 means end of chain The Time setting is between 0 01 and 300 seconds In order to access one of the 40 memory locations an index value must be provided The 40 memory locations can be very useful in remote mode using the RCL command see Appendix A PAR A 10 MEASURE SUBSYSTEM This query subsystem returns the voltage and current measured at the power supply s output terminals OUTPUT SUBSYSTEM This subsystem controls the power supply s voltage and current outputs PROTECTION SUBSYSTEM This subsystem allows overvoltage overcurrent protection tripping to be delayed to prevent brief transients caused by application of power to a reactive load from tripping overvoltage overcur rent protection STATUS SUB
62. DS USED WITH ATE DMG POWER SUPPLY ATE DMG 020613 3 25 3 7 41 KEYWORD Keywords are instructions recognized by a decoder within the ATE DMG referred to as a parser Each keyword describes a command function all keywords used by the ATE DMG are listed in Figure 3 8 Each keyword has a long form and a short form For the long form the word is spelled out com pletely e g STATUS OUTPUT VOLTAGE and TRIGGER are long form keywords For the short form only the first three or four letters of the long form are used e g STAT VOLT OUTP and TRIG The rules governing short form keywords are presented in Table 3 8 TABLE 3 8 RULES GOVERNING SHORTFORM KEYWORDS IF NUMBER OF LETTERS IN AND FOURTH LETTER THEN SHORT FORM LONGFORM KEYWORD IS IS VOWEL CONSISTS OF EXAMPLES 4 OR FEWER DOES NOT MATTER ALL LONG FORM LETTERS MODE THE FIRST FOUR NO LONG FORM LETTERS MEASure OUTPut EVENt 5 OR MORE YES THE FIRS MEE LEVel IMMediate ERRor LONG FORM LETTERS KEYWORD ROOT SPECIFIER 4 MESSAGE UNIT SEPARATOR DATA SEPARATOR KEYWORD N DATA KEYWORD SEPARATOR KEYWORD 11 DATA SEPARATOR DATA MESSAGE UNIT SEPARATOR ROOT SPECIFIER KEYWORD QUERY INDICATOR MESSAGE TERMINATOR CURR LEV 3 5 OUTP CURR lt NL gt MESSAGE UNIT FIGURE 3 9 MESSAGE STRUCTURE 3 26 ATE DMG 020613 3 7 4 2 3 7 4 3 3 7 4 4 3 7 4 5 3
63. E COMMAND SAV Syntax Description ATE DMG 020613 SAV lt integer gt 1 to 40 Saves the present state of output voltage output current overvoltage and overcurrent to the specified memory location This command stores the present state of the power supply to one of 40 memory locations The following parameters are stored by SAV CURR LEV IMM VOLT LEV IMM CURR PROT LEV and VOLT PROT LEV The SAV command also saves the language status and output on off state The stored values can be restored by the RCL command See example Figure A 1 CLS ESE 60 ESE ES ESR OPC VOLT 21 CURR 3 SAV33 ESR ESR VOLT 15 CURR 5 OPC RCL33 RST SRE 40 SRE STB VOLT 25 VOLT TRIG 12 INIT TST Power supply clears status data Power supply enables bits 5 4 3 and 2 allowing command error execution error device dependent error and query error to set the Event Status Summary bit when an STB command is executed Returns 60 value of the mask verifying that bits 5 4 3 and 2 are enabled Unknown command will set command error Bit 5 Returns 32 bit 5 set indicating Command Error has occurred since the last time the register was read Power supply returns KEPCO ATE 100 10 082495 001 1 0 Allows status bit 0 to be set when pending operations complete Sets output voltage to 21V output current to 3A The present state of the power supply is stored in
64. E OF CONTENTS SECTION PAGE SECTION 1 INTRODUCTION 1 1 SCOPES Of Manual 2 ene etat ere e ian s 1 1 1 2 General Descriptio M S 1 1 1 3 mnn 1 1 1 4 Local Control 1 1 1 5 Remote Control 2 2 te elie de heen eh GAL heeds 1 1 1 6 1 5 1 6 1 Overvoltage Overcurrent Protection 1 5 1 6 1 1 Programmable Overvoltage Overcurrent Delay essem 1 5 1 6 1 2 Crowb r 1 6 1 6 2 Non volatile Storage of Programmed Sequences or Active Settings 1 6 1 6 3 User defined Voltage Current 1 1 6 1 7 Equipment Supplied hte EO OE GIG Educa 1 6 1 8 ACCESSOMIOS E 1 6 1 9 SE aes Se EE 1 6 SECTION 2 INSTALLATION 2 1 Unpacking and Inspection Ea a E a 2 1 2 2 Terminations and 2 1 2 3 Source Power Requirements osrin quiescere tees UI ted ede pepe edet diee ette codd ende 2 5 24 16767211479 a i eee eee A 2 6 2 5 Preliminary Operational Chek 2 2 css
65. G lt end of line gt The message unit may include a data parameter after the keyword sepa rated by a space the parameter is usually numeric e g CURR 5 lt newline gt but may also be a string e g OUTP ON lt newline gt Figure 3 9 illustrates the message structure showing how message units are combined The following subparagraphs explain each component of the message structure NOTE An alternative to using the message structure for multiple messages defined in the fol lowing paragraphs is to send each command as a separate line In this case each com mand must use the full syntax shown in Appendix B ATE DMG 020613 ROOT colon ABORt subsystem ABORt subsystem INITiate IMMediate CONTinuous bool CONTinuous CALibrate subsystem CALibrate STATus boolean password STATus VOLTage LEVel MIN MAX ZERO DATA val GAIN UP DOWN CURRent LEVel MIN MAX ZERO DATA val GAIN UP DOWN ZERO SAVE DISPlay subsystem DISPlay CONTrast 0 to 1 CONTrast WINDow TEXT DATA WINDow TEXT DATA WINDow STATe 0 1 WINDow STATe DIAG subsystem DIAG EXT lt value gt DIAG EXT PROGram subsystem PROGram RUN STOP STATe STATe MEASure subsystem MEASure SCALar CURRent DC SCALar VOL Tage DC OUTPut subsystem OUTPut STATe ON or OFF STATe SOURce subsystem SOURce VOLTage
66. IMEval NEXT STEP the parameter s value on the right and data entry status in the middle To modify time values see PAR 3 4 15 1 1 Press ENTER to accept displayed value or enter new value and press ENTER to accept new setting the LCD displays the next parameter Press CLEAR to exit Program Edit mode without changing value Use gt key to scroll forward or backward to view next or previous parameter or memory location For a program to run once then stop see PAR 3 4 15 6 to cycle a program continuously see 3 4 15 4 After all program values have been set press CLEAR or ENTER to exit Program Edit mode Setting up a program can be made easier by copying the Memory Location Worksheet Table 3 3 and filling in the values before program ming the power supply 3 4 15 1 1 MODIFYING PROGRAMMED TIME INTERVAL The TIME key offers a quick and easy way to change the time for any memory location With the power supply in command entry status press TIME key The LCD displays TIMEval nn where nn is the time value set for the selected location Press ENTER to accept displayed ATE DMG 020613 value or enter new value between 0 01 and 300 seconds and press ENTER to accept new value or press CLEAR to exit without changing value The unit returns to command entry status Refer to PAR 3 4 15 1 2 if accuracy of time values is important 3 4 15 1 2 TIME INTERVAL ACCURACY The accuracy of the time interval is 2 5 For settin
67. ITION NU cc Nu NU CAL INTERFACE COMPUTING NEW CALIBRATION CONSTANTS CC POWER SUPPLY IN CONSTANT CURRENT MODE n 10 7 6 5 4 1 0 POWER SUPPLY IN CONSTANT VOLTAGE MODE WES NU NOT USED VALUE 2048 1024 512 256 128 64 32 16 2 1 WTG WAIT FOR TRIGGER SET BY INIT SUBSYSTEM 76 STATus OPEReration ENABle COMMAND STAT OPER ENAB Syntax Short Form STAT OPER ENAB int value 0 to 1313 1 32 256 1024 Long Form STATus OPERation ENABle int value 0 to 1313 1 32 256 1024 Description Sets Operation Enable Register The Operation Enable Register is a mask for enabling specific bits in the Operation Event Register which will cause the operation summary bit bit 7 of the Status Byte register to be set Bit set to 1 function enabled active true bit reset to O function disabled inac tive false The operation summary bit is the logical OR of all the enabled bits in the Operation Event register See example Figure B 7 ATE DMG 020613 B 17 77 STATus OPEReration ENABle QUERY STAT OPER ENAB Syntax Short Form STAT OPER ENAB Long Form STATus OPERation ENABle Return Value lt int_value gt 0 to 1313 1 32 256 1024 Description Reads Operation Enable Register see Table B 2 Returns value of Operation Enable Register bits Bit set to 1 function enabled active true bit reset to 0 function disabled inacti
68. LI Command nsec irii A entente nennen nennen B 8 ISOUR EISEDWELIP Query ie e te e ee e De t le e e e et Denis B 9 SOUR LIST INDex Command sss nennen nennen nens B 9 SOUR LIST INDex Query sss eene enne nnne nnne nnne nen B 9 SOUR LIST SEQuence NEXT Command B 9 SOUR LIST SEQuence NEXT Query sss eene nnne nenne B 9 SOUR LIST SEQuence STARt Command B 9 SOUR LIST SEQuence STARt sse B 9 SOUR LIST VOLTage 2 2 22 22 0000000000000000000000000000000000000000000 A 10 SOUR EIS T V OL Tage Query ie B 10 SOUR LIST VOLTage PROTect Command sss enne B 10 SOUR LIST VOLTage PROTect Query eee B 10 MEASure SCALar CURRent DC sss eene B 10 MEASure VOLTage SCALar DC Query sse B 10 OUTPut STATe sss enne nennen nennt B 11 OUTPUutES TATe Quiety 3 rtt tco Ete ttn titt B 11 OUTPut PROTection DELay Command ccceccccesesceeeceseseeeeeeeceeeceeeeeeeeeeeeeeeseeeeeeeeeeeeteseeseeeeeaeeeeats B 11 OUTPut PROTection DELay sse entente B 11 PROGram SELect STATe sess entrent nnns B 11 PROGram SELect S TATe Que ny e X eiecti ce eiae e edet B 11 READ SCALar CURRent DC
69. OPERATOR MANUAL ATE DMG SERIES POWER SUPPLY MODELS INC ATE 6 100DMG ATE 15 50DMG An ISO 9001 Company ATE 25 40DMG ATE 36 30DMG ATE 55 20DMG ATE 75 15DMG ATE 100 10DMG ATE 150 7DMG ORDER NO REV NO IMPORTANT NOTES 1 This manual is valid for the following Model and associated serial numbers MODEL SERIAL NO REV NO 2 A Change Page may be included at the end of the manual All applicable changes and revision number changes are documented with reference to the equipment serial num bers Before using this Instruction Manual check your equipment serial number to identify your model If in doubt contact your nearest Kepco Representative or the Kepco Docu mentation Office in New York 718 461 7000 requesting the correct revision for your particular model and serial number 3 The contents of this manual are protected by copyright Reproduction of any part can be made only with the specific written permission of Kepco Inc Data subject to change without notice P N 243 1324b THE POWER SUPPLIER KEPCO INC 131 38 SANFORD AVENUE FLUSHING NY 11355 U S A TEL 718 461 7000 FAX 718 767 1102 email hq Qkepcopower com World Wide Web http www kepcopower com Declaration of Conformity Application of Council directives 73 23 EEC LVD 93 68 EEC CE mark Standard to which Conformity is declared EN61010 1 2001 S
70. ORMAL or TEXT Description Identifies the LCD mode Returns NORMAL when the display is in normal mode TEXT when the dis play is in text mode Related Commands DISP MODE DISP TEXT RST See example Figure B 3 18 DISPlay TEXT COMMAND DISP TEXT Syntax Short Form DISP TEXT DATA char string Long Form DISPlay TEXT DATA char string Description Allows entry of character string to be viewed when LCD display is set to Text mode Allows for character strings of maximum 16 characters to be displayed on the second line of the LCD when the display mode is TEXT e g DO NOT TOUCH or ATE IS IN USE etc The LCD has the following char acter set A to Z 0 to 9 and special characters as lt gt If the message exceeds the display capacity only the first 16 characters will be displayed and no error message will be generated Upon executing RST character string set to 16 spaces Related Commands DISP TEXT DISP MODE DISP MODE RST See example Figure B 3 B 19 DISPlay TEXT QUERY DISP TEXT Syntax Short Form DISP TEXT Long Form DISPlay TEXT Return Value Character string displayed on second line of LCD display Description Returns the text displayed on second line of LCD in TEXT mode When the display set to TEXT B 6 mode returns the character string entered by DISP TEXT If the display set to NORMAL mode returns information displayed on second line of display This can be used to see the monitored
71. R to enable or disable the feature DIGITAL REMOTE MODE PROGRAMMING ATE DMG Power Supplies may be programmed over a control bus using SCPI Standard Com mands for Programmable Instruments SCPI provides a common language conforming to IEEE 488 2 for instruments used in an automatic test system The control bus used must be the IEEE 488 standard communication bus General Purpose Interface Bus GPIB Refer to Table 2 4 for input output signal allocations Most power supply functions available from the keypad can be programmed via remote commands in addition to some that are not available from the keypad e g triggering and local lockout This section includes a discussion of GPIB bus protocols PAR 3 6 1 instructions for changing the GPIB address PAR 3 6 3 followed by a detailed explanation of SCPI programming PAR 3 7 IEEE 488 GPIB BUS PROTOCOL Table 3 5 defines the interface capabilities of the ATE DMG power supply Talker Listener rela tive to the IEEE 488 GPIB bus reference document ANSI IEEE Std 488 IEEE Standard Digital Interface for Programmable Instrumentation communicating with a Host Computer Controller Talker Listener Tables 3 6 and 3 7 define the messages sent to the ATE DMG or received by the ATE DMG via the IEEE 488 bus in IEEE 488 command mode when ATN is asserted and IEEE 488 data mode respectively These messages are enabled during the handshake cycle with the ATE DMG power supply operating
72. RIP B 73 INITEIMM B 20 SOUR FUNC MODE B 74 INIT CONT 2 B 21 B 22 STAT OPER COND B 75 INST STAT B 23 B 76 B 77 SOUR LIST CURR 2 B 24 B 25 STAT OPER EVENT B 78 SOUR LIST CURR PROT 2 B 26 B 27 5 B 79 SOUR LIST DWELL 2 B 28 B 29 2 B 80 SOUR LIST IND 2 B 30 B 31 STAT QUES COND B 81 SOUR LIST SEQ NEXT 2 B 32 B 33 STAT QUES ENAB B 82 B 83 SOUR LIST SEQ START 2 B 34 B 35 SYST ERR B 84 SOUR LIST VOLT 2 B 36 B 37 SYST ERR CODE B 85 B 86 SOUR LIST VOLT PROT 2 B 38 B 39 SYSTKLOCK 2 B 87 B 88 MEAS CURR B 40 SYST LANG B 89 B 90 MEAS VOLT 41 SYST PASS DIS B 91 B 92 OUTP STAT 2 B 42 B 43 SYST PASS STAT B 93 OUTP PROT DEL 2 B 44 B 45 SYST SEC B 94 PROG STAT B 46 B 47 SYST SET B 95 READ CURR B 48 SYST VERS B 96 ATE DMG 020613 B 1 2 ABORt COMMAND ABOR Syntax Short Form ABOR Long Form ABORt Description Cancels previously stored trigger levels resets WTG The ABORt command cancels any pending trigger levels previously stored by the CURR TRIG or VOLT TRIG commands The pending level is set equal to the corresponding immediate value ABORt also resets the WTG Wait TriGger bit in the Operation Condition status register If INIT CONT ON has been programmed the trigger system re arms itself immediately after ABORt thereby setting WTG WTG is bit 5 the STATUS OPERATION CONDITION r
73. ST command is equivalent to SAV 10 RECALL COMMAND RCL Syntax Description RCL integer 1 to 40 Restores power supply to previously defined levels of output voltage output current overvolt age protection and overcurrent protection This command selects one of the 40 power supply memory locations each of which stores values for output current output voltage overvoltage protec tion and overcurrent protection The following parameters are affected by RCL CURR LEV IMM VOLT LEV EIMM CURR PROT LEV VOLT PROT LEV The recall function also sets the unit to operating parameters to SCPI compatible mode or device clear operation and output on or off If the recall value was not initialized by the SAV command but from an edit save or front panel save the output condition will remain unchanged along with the language preferences See example Fig ure A 1 RESET COMMAND RST Syntax Description RST Resets power supply to the power on default state The power supply is programmed to the power on values of the following parameters CURR LEV IMM 0 VOLTELEV EIMM 0 max overcurrent value see Table 1 2 VOLT PROT LEV maximum overvolt age value see Table 1 2 OUTP STAT OFF If the power supply is in either an overvoltage or overcurrent state this condition is reset by RST See example Figure A 1 12 SAV SAV
74. SYSTEM This subsystem programs the power supply status register The power supply has two groups of status registers Operation and Questionable Each group consists of three registers Condition Enable and Event ATE DMG 020613 3 23 3 7 3 10 3 7 3 11 3 7 3 12 3 7 4 3 24 TRIGGER SUBSYSTEM This subsystem controls the remote triggering of the power supply SOURCE VOLTAGE AND SOURCE CURRENT SUBSYSTEMS These subsystems program the output voltage and current of the power supply CALIBRATE SUBSYSTEM The ATE DMG series of power supplies support software assisted calibration A full calibration consist of a voltage calibration and a current calibration Both voltage and current calibrations consist of a zero and a full scale calibration There are two ways to perform the calibration locally using the front panel keys or remotely sending commands through the GPIB bus These two ways cannot be combined In order to enter the calibration mode the correct calibration access code password must be entered If the password has been forgotten call the factory and a secret password which has been assigned to your power supply will be provided During the calibration new calibration data is computed which is than stored in the non volatile memory The following equipment is required for calibration Digital Voltmeter DVM with 6 digits Dc accuracy Shunt 0 01 to 0 1 Ohm 0 04 minimum 100A power gt 100W 200W recom mended
75. T Syntax Short Form SOUR VOLT LEVI IMMI AMP MIN Long Form SOURce VOLTage LEVel IMMediate AMPlitude MIN MAX Description Identifies programmed voltage maximum allowable voltage or minimum voltage always 0 The VOLT query returns the programmed value of voltage Actual output voltage will depend on load conditions The VOLT MAX query returns the maximum voltage allowed for a particular model 25V for ATE100 10DMD VOLT MIN returns minimum voltage allowed for power supply always 0 Related Commands VOLT See example Figure B 6 64 SOURce VOLTage LEVel TRIGgered AMPlitude COMMAND VOLT TRIG Syntax Short Form SOUR VOLT LEV TRIG AMP lt exp_value gt Long Form SOURce VOLTage LEVel TRIGgered AMPlitude lt exp_value gt lt exp_value gt digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Programs voltage value to be transferred to output by TRG commands Actual output voltage will depend on load conditions If the value exceeds the maximum for the model being programmed error message 222 Data out of range is posted in output queue If value exceeds VOLT LIM HIGH value a value corresponding to the voltage limit will be programmed See example Figure B 1 B 65 SOURce VOLTage LEVel TRIGgered AMPlitude QUERY VOLT TRIG Syntax Short Form SOUR VOLT LEV TRIG AMP Long Form SOURce VOLTage LEVel TRIGgered AMPlitude Return
76. TA 0 decreases output current by small increment CAL CURR DATA 1 increases output current by small increment CAL CURR DATA 2 decreases output current by large increment CAL CURR DATA 3 increases output current by large increment This command is used during current calibration to adjust the out put current for current zero calibration as well as full scale current calibration Output current is moni tored on a calibrated digital multimeter reading voltage at the sense terminals of the shunt resistor and increased or decreased as required using this command This command is only effective if Cali bration status and either Current Zero or Current Full Scale calibration are active This command is equivalent to the on the front panel left and right arrow keys for fine adjustment and the 1 and 3 keys for coarse adjustment Related Commands CAL STAT CAL PASS CAL VOLT CAL CURR CAL ZERO CAL SAVE See example Figure B 2 SYST PASS CEN 1234 CAL STAT ON CAL STAT CAL VOLT LEV MIN CAL VOLT 1 CAL VOLT LEV MAX CAL VOLT 0 CAL ZERO CAL CURR LEV MIN CAL CURR 1 CAL CURR LEV MAX Sets Password Enable state Power supply enters Calibrate status Returns 00 indicating power supply in Calibrate status Voltage Zero Calibration selected Output voltage increased Voltage Full Scale Calibration selected voltage zero values stored in volatile memory Output voltage decreased Output voltage and current set to zero Voltage maxim
77. V SET Overcurrent Overvoltage NEXT STEP LOCATION Current Voltage Protection Protection 0 to 2 5 Next location A V Sec to execute A V 1 2 1 4 3 11 11 1 5 02 2 1 2 5 0 1 3 5 2 1 8 03 3 4 5 6 2 4 8 6 4 1 0 01 3 4 16 CALIBRATION ATE DMG 020613 See Section 4 3 5 ANALOG REMOTE PROGRAMMING The ATE DMG has the capability to control the output using external d c analog reference volt ages Analog references for both voltage and current are required to produce an output Two uncommitted amplifiers preamps A and B included in the unit can be used for signal condi tioning Each preamp has an inverting input non inverting input and output and a zero adjustment the preamps are accessible via A11J5 pins as shown in Figures 2 3 and 3 7 and listed in Table 3 4 To gain access to A11J5 loosen two screws at the rear panel and disconnect interconnection adapter A11 then remove two screws securing connector A11J1 to the shell FIGURE 3 7 A11 ASSEMBLY CONNECTOR AND PIN LOCATIONS TABLE 3 4 CONNECTOR A11J5 PIN FUNCTIONS PIN FUNCTION PIN FUNCTION 1 VEXT 6 GND 2 CEXT 7 PREAMP B IN 3 PREAMP A OUT 8 GND 4 PREAMP IN 9 PREAMP IN 5 PREAMP IN 10 PREAMP B OUT For further details about Preamp A and B go to www kepcopower com support and down load the Operator manual for ATE 1 4 Rack 1 2 R
78. Vel COMMAND CURR PROT Syntax Short Form SOUR CURR PROT LEV exp value Long Form SOURce CURRent PROTection LEVel exp value exp value digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Sets overcurrent protection level for power supply If the value is out of the acceptable overcurrent range for the power supply model error message 222 Data out of range is posted in the output queue If the power supply output exceeds the current protection level programmed then the power supply output is disabled programmed to 0 and the OV bit in the Questionable Condition status reg ister is set An overcurrent condition can be cleared with the CURR PROT CLE command The current protection level can be programmed independently of the output current level Setting current protec tion to a value lower than the output current causes the current protection mechanism to trigger after the delay established by OUTP PROT DEL command See example Figure B 5 NOTES 1 Power supply assumed to be operating in constant voltage mode 2 Examples below are intended only to illustrate command functions Refer to PAR 3 6 5 for programming techniques to optimize performance VOLT 21 CURR 1 1 Power supply programmed to voltage limit 21V 1 1A CURR Returns 1 1 CURR LIM HIGH 3 3 Current limit set to 3 3A CURR LIM HIGH Returns 3 3 CURR 4 2 Power supply output current programmed to 3 3A SYST ERR Error message 301
79. ack 3 4 Rack or Full Rack and refer to PAR s 3 37 through 3 84 Connections to A11J5 can be made via discrete wires a flat ribbon cable not exceeding 1 foot in length or by discrete wires terminated into crimp style pins inserted into a 5x2 housing not sup plied The following parts are recommended but not supplied ribbon cable AMP 746285 1 Kepco P N 142 0246 Housing for discrete wires Molex 39 01 2100 Kepco P N 142 0434 Pins Molex 39 00 0039 Kepco P N 107 0290 4 ea NOTE When making connections to A11J5 move unused jumper to a single pin of connector J3 DO NOT SHORT J3 PINS ATE DMG 020613 3 6 3 6 1 1 Connect a 0 to 10V voltage reference to A11J5 pin 1 pin 6 common OV programs the out put voltage to zero 10V programs output voltage to full scale 2 Connect a 0 to 1V current reference to A11J5 pin 2 pin 8 common OV programs the output current to zero 1V programs output current to full scale 3 Turn on the external reference feature by sending the DIAG EXT 01 command via the GPIB interface 4 Enable the external reference feature from either the front panel PAR 3 4 14 or using GPIB commands see PAR B 12 To access the external reference feature from the front panel with the power supply in com mand entry status press MENU key until the top line of the display reads Extern Ref On or Extern Ref Off and the bottom line reads 0 1 On Enter 1 to enable or 0 to disable and press ENTE
80. afety requirements for electrical equipment for measurement control and laboratory use Part 1 Manufacturer s Name and Address KEPCO INC 131 38 SANFORD AVENUE FLUSHING N Y 11355 USA Importer s Name and Address Type of Equipment Component Power Supply Model No PRODUCT MODEL NUMBER Year of Manufacture the undersigned declare that the product specified above when used in conjunction with the condi tions of conformance set forth in the product instruction manual complies with the requirements of the Low Voltage Directive 73 23 EEC which forms the basis for application of the CE Mark to this product Place KEPCO Inc 131 38 Sanford Ave Flushing N Y 11355 USA Saul Kupferberg Full Name OF SALES position 228 1348 DC COMP INST 020613 Conditions of Conformance When this product is used in applications governed by the requirements of the EEC the following restric tions and conditions apply 1 For European applications requiring compliance to the Low Voltage Directive 73 23 EEC this power supply is considered a component product designed for built in applications Because it is incom plete in construction the end product enclosure must provide for compliance to any remaining electri cal safety requirements and act as a fire enclosure EN61010 1 2001 6 Cl 7 CI 8 and Cl 9 This power supply is designed for stationary installation with mains power
81. age or output current An additional 5 in overvoltage and overcurrent protection above the digitally controlled setting is provided to allow the user when using external references to utilize the headroom of the basic ATE power supply The ATE power supply can provide at least 1 additional voltage or current as long as the total unit power is not exceeded Total power varies from 600 watts to 1080 watts depending on model total power nominal voltage nominal current ATE DMG 020613 3 4 10 3 4 11 3 4 12 CHANGING PROTECTION DELAY The overvoltage and overcurrent protection normally trips immediately upon detection of an overvoltage overcurrent condition However changing output settings particularly with reactive loads large transients can cause inadvertent tripping of the protection For this reason tripping of the overvoltage overcurrent protection can be delayed approximately 8 seconds after the out put is changed With the power supply in command entry status press MENU key eleven times LCD reads Prot Delay Count nn where nn is the active setting A count of 0 means no delay a count of 255 highest value means approximately 8 seconds delay a count of 30 provides a delay of 1 second CHANGING MAXIMUM VOLTAGE OR CURRENT VALUE The maximum values of voltage and current are determined by the model e g 25V and 40A for the ATE 25 40DMG These values can be lowered by the user e g to prevent inadvertent dam age
82. ance at higher frequencies Load wire selection should therefore proceed with those facts in mind The load wire size should not only be selected for minimum voltage drop Error Sensing as discussed below will take care of that but also the series inductance of the load wire must be kept as small as possible compared to the source inductance of the power supply Error Sensing cannot compensate for this These dynamic considerations are especially important if 1 The load is constantly changing in value 2 The load is switched and off 3 The output of the power supply is step programmed 4 The load has a primarily reactive characteristic 5 All other cases where the dynamic output response of the power supply is considered impor tant 3 2 LOAD CONNECTION 3 2 1 GENERAL Kepco has provided a group of terminals on the programming connector PC 12 and on the bar rier strip TB210 at the rear of the power supply which permit maximum flexibility in power sup ply load interface techniques Although all applications tend to exhibit their own problems the basic interconnections described may be used as a general guide in the interconnection between power supply and load The Kepco power supply is shipped from the factory with several jumper links see Figure 3 2 connected to the barrier strip TB201 These links may be removed and replaced at will depending on the method of connecting the load Positioned as shown in Fi
83. applied via a detachable power supply cord or via direct wiring to the source power terminal block This power supply is considered a Class 1 earthed product It is intended for use as part of equip ment meant for test measurement and laboratory use and is designed to operate from single phase three wire power systems This equipment must be installed within a suitably wired equipment rack utilizing a three wire grounded mains connection See wiring section of this manual for complete electrical wiring instructions EN61010 1 2001 1 6 10 1 This power supply has secondary output circuits that are considered hazardous and which exceed 240 VA at a potential of 2V or more The output wiring terminals of this power supply has not been evaluated for field wiring and therefore must be properly configured by the end product manufacturer prior to use This power supply employs a supplementary circuit protector in the form of a circuit breaker mounted on the front panel This circuit breaker protects the power supply itself from damage in the event of a fault condition For complete circuit protection of the end product as well as the building wiring it is required that a primary circuit protection device be fitted to the branch circuit wiring EN61010 1 2001 Cl 9 5 Hazardous voltages are present within this power supply during normal operation All operator adjust ments to the product are made via externally accessible switches con
84. as either a Talker or a Listener ATE DMG 020613 3 19 TABLE 3 5 IEEE 488 GPIB BUS INTERFACE FUNCTIONS SUBSET FUNCTION SYMBOL COMMENTS Source Handshake SH1 Complete Capability Interface can receive multiline messages Acceptor Handshake AH1 Complete Capability Interface can receive multiline messages Talk r T6 Basic talker serial poll unaddress if MLA My Listen Address one byte address Listener L4 Basic listener unaddress if MTA My Talk Address one byte address Service Request SR1 Complete Capability The interface sets the SRQ line true if there is an enabled service request condition Complete capability Interface selects either local or remote information In local mode the ATE DMG executes front panel commands but can be set to remote mode via IEEE 488 bus When in Remote mode all front panel keys are disabled except LOCAL LOCAL key can be disabled using key pad lockout command see Appendix B PAR B 87 so that only the con troller or a power on condition can restore Local mode Parallel Poll PPO No Capability Device Clear DC4 Complete Capability ATE DMG accepts DCL Device Clear and SDC Selected Device Clear Device Trigger DT1 Respond to TRG and lt GET gt trigger functions Controller CO No Capability 3 20 TABLE 3 6 IEEE 488 GPIB BUS COMMAND MODE MESSAGES MNEMONIC E
85. ating overvoltage condition not tripped VOLT Returns 0 programmed voltage value OV VOLT 21 CURR 1 1 Power supply programmed to go to 21V 1 1A VOLT Returns 21 VOLT LIM HIGH 5 Voltage limit set to 5V VOLT LIM HIGH Returns 5 VOLT 33 Power supply programmed to 5V SYST ERR Error message 301 Value bigger than limit VOLT Returns 5 FIGURE B 6 PROGRAMMING VOLTAGE 71 SOURce VOLTage PROTection LEVel QUERY VOLT PROT Syntax Description B 16 Short Form SOUR VOLT PROT LEV MIN MAX Long Form SOURce VOLTage PROTection LEVel MIN MAX Return Value lt exp_value gt digits with decimal point and Exponent e g 2 71E 1 for 27 1 Identifies overvoltage protection setting maximum allowable overvoltage protection or mini mum overvoltage protection VOLT PROT returns value set by VOLT PROT VOLT PROT MAX ATE DMG 020613 returns maximum voltage protection value see Table 1 2 this value is determined at the factory and cannot be changed by the user VOLT PROT MIN returns the minimum voltage protection value always 0 See example Figure B 6 B 72 SOURce VOLTage PROTection CLEar COMMAND VOLT PROT CLE Syntax Short Form SOUR VOLT PROT CLE Long Form SOURce VOLTage PROTection CLEar Description Clears overvoltage condition Output programmed to OV current limit programmed to small value approximately 1 of full scale current rating Overvoltage Protection Tripped is reset so that
86. be recalled press ENTER to accept dis played value CLEAR Data Entry Press to exit Data Entry status any numbers entered are lost Restores 3 4 8 Command Entry status 1 Data Entry Press to enter number 1 3 4 1 2 2 Data Entry Press to enter number 2 3 4 1 2 3 Data Entry Press to enter number 3 3 4 1 2 ENTER Data Entry Press to accept data entered and return to Command Entry status 3 4 8 In CV constant voltage press to decrease output voltage by increment 3 4 8 equal to voltage resolution lt 0 025 of Egmax In CC constant current press to decrease output current by increment Command Entry equal to current resolution lt 0 025 of n EDIT PROG status changes the parameter displayed on LCD for a specific memory location and decrements memory location displayed on LCD Data Entry Frases number to left or decreases value shown e g Display Contrast set 3 4 8 ting 0 Data Entry Press to enter number 0 3 4 1 2 Data Entry Press to enter decimal point 3 4 1 2 In CV constant voltage press to increase output voltage by increment 3 4 8 equal to voltage resolution lt 0 025 of Egmax In CC constant current press to increase output current by increment Command Entry equal to current resolution lt 0 025 of Io max gt In EDIT PROG status changes the parameter displayed on LCD for a specific memory location and increments memory location displayed on LCD Data Entry Not
87. cation selected by LIST IND Related Com mands LIST IND LIST IND LIST VOLT See example Figure B 4 B 38 SOUR LIST VOLTage PROTect COMMAND LIST VOLT PROT Syntax Short Form LIST VOLT PROT lt exp_value gt Long Form LIST VOLTage PROTect lt exp_value gt lt exp_value gt digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Sets the voltage protection value for the indexed memory location selected by LIST IND If the value is out of the acceptable voltage range for the power supply model an error message 222 Data out of range is posted in the output queue The voltage value is stored in non volatile memory and is retained when the power supply is turned off Related Commands LIST IND LIST IND LIST VOLT PROT See example Figure B 4 NOTE When programming sequential voltage levels it is important to set the Overvoltage to accommo date the highest voltage of the sequence Otherwise when going from higher to lower voltage levels the overvoltage protection will trip and shut down the unit because the overvoltage setting registers faster than the power supply can attain the lower voltage B 39 SOUR LIST VOLTage PROTect QUERY LIST YOLT PROT Syntax Short Form LIST VOLT LEV Long Form LIST VOLTage LEVel Return Value num value digits with decimal point and Exponent Description Returns voltage protection value stored in indexed memory location selected by LIST IND Related Comma
88. causes the power supply to do a self test and provide the controller with pass fail results A cyclic redundancy check CRC is performed on non volatile RAM A 1 is returned if there is an error ATE DMG 020613 A 5 A 6 Blank APPENDIX B SCPI COMMAND QUERY DEFINITIONS B 1 INTRODUCTION This appendix defines the SCPI subsystem commands and queries used with the ATE Power Supply Subsystem commands are defined in PAR B 2 through B 96 arranged in groups as they appear in the tree diagram Figure 3 7 Table B 1 provides a quick reference of all SCPI subsystem commands and queries used in the Interface Card TABLE B 1 SCPI SUBSYSTEM COMMAND QUERY INDEX COMMAND PAR COMMAND PAR ABORt B 2 READ VOLT B 49 CAL VOLT GAIN B 3 SOUR JCURR LEV IMM AMP 2 B 50 B 51 CAL CURR DATA BA SOUR CURR LIM HIGH 2 B 52 B 53 CAL PASS B 5 SOUR CURR PROT LEV 2 B 56 B 57 CAL CURR GAIN B 6 SOUR CURR PROT CLE B 58 CAL STAT B 7 B 8 SOUR CURR PROTTRIP B 59 CAL VOLT LEV SOUR CURR LEV TRIG AMP 2 B 60 61 CAL VOLT DATA B 10 SOUR VOLT LEV IMM AMP 2 B 62 B 63 CAL ZERO B 11 SOUR VOLT LEV TRIG AMP B 64 B 65 DIAG EXT B 12 B 13 SOUR VOLT LIM HIGH 2 B 66 B 67 DISP CONT B 14 B 15 SOUR VOLT PROT LEV B 70 71 DISP MODE B 16 B 17 SOUR VOLT PROT CLE B 72 DISP TEXT 18 B 19 SOUR VOLT PROT T
89. ccsccseecsecessecnestuncenseceeenedbeeesthenseahensencencesetenscuehetinesscecetadtesuonetedtieess 2 6 2 6 2 7 2 6 1 Cei LI 2 7 2 6 1 1 Safety Ground e aa ite ee eee eed tie tees 2 7 2 6 1 2 Isolation from Gro Fd e sn dg ten dre tpe e Leo ede devotes 2 7 2 7 Fast Mode Conversion of the Ate Power 2 7 2 7 1 Precautions o oon emere etre dep RE etie dr eie E P M E ES 2 8 2 7 2 Lag Network 2 8 2 7 3 Crowbar Operation Fast En 2 8 2 7 4 Manual Change over Slow fast 2 8 2 8 222 2 e Ute 2 9 SECTION 3 OPERATION 3 1 General tette eio ae dep Ie Le DE eds acl donc 3 1 3 1 1 Safety Grounding 3 vests e ecd deve e dede ees 3 1 3 1 2 D G Outp t Groundirig 3 1 3 1 3 Power Supply Load Interface 3 2 3 1 3 1 koad Wire Sel6Ction tele end eset eed ee edd 3 2 3 2 Load E 3 3 3 2 1 nore IER DER E E ite is 3 3 3 2 2 Load Connection Method Local Error
90. cee D B 21 B 5 Master PassWOFdS iuum itn ete PURSE pln B 22 ATE DMG02613 vii FIGURE 1 1 ATE DMG SERIES PROGRAMMABLE POWER SUPPLY ATE DMG020613 ix ix Blank x ATE DMG020613 1 1 1 2 1 3 1 4 1 5 SECTION 1 INTRODUCTION SCOPE OF MANUAL This manual contains instructions for the installation operation and maintenance of the ATE series of voltage and current stabilized d c power supplies manufactured by Kepco Inc Flush ing New York U S A GENERAL DESCRIPTION The Kepco ATE DMG with programmable overvoltage protector is a precision stabilized power supply which can deliver either stabilized output voltage or current The prevailing operating mode is indicated by LED mode indicators on the front panel Operating mode crossover is automatic and may be monitored remotely by commands provided via the GPIB port A digital front panel display shows the output voltage and output current This power supply has a linear and fully dissipative NPN pass transistor section driven by high gain integrated circuit amplifi ers The output of the power supply is fully programmable via either the GPIB port or the front panel keypad Terminals are also provided for remote error sensing as well as for the connec tion of the output capacitor directly at the load The ATE DMG power supply features user selectable slow or fast operating modes Slow mode
91. creases output voltage by small increment CAL VOLT DATA 1 increases output voltage by small increment CAL VOLT DATA 2 decreases output voltage by large increment CAL VOLT DATA 3 increases output voltage by large increment This command is used during volt age calibration to adjust the output voltage for voltage zero calibration as well as full scale voltage cal ibration Output voltage is monitored on a calibrated digital multimeter and increased or decreased as required using this command This command is only effective if Calibration status and either Voltage Zero or Voltage Full Scale calibration are active This command is equivalent to the front panel left and right arrow keys for fine adjustment and the 1 and 3 keys for coarse adjustment Related Commands CAL STAT CAL PASS CAL VOLT CAL CURR CAL ZERO CAL SAVE See example Figure B 2 B 11 CALibrate ZERO COMMAND CAL ZERO Syntax Description Short Form CAL ZERO Long Form CALibrate ZERO Sets output to zero while calibration equipment connections are changed This command is used when changing from Voltage to Current calibration or vice versa CAL ZERO sets output voltage and current to zero The user then connects or disconnects the shunt resistor or the digital voltmeter from the out put terminals of the power supply as required for the subsequent Voltage or Current calibration The next command should select the new parameter to be calibrated Related Commands CAL STAT
92. cters received in single input string ATE DMG 020613 B 21 SYST PASS CEN Long Form SYSTem PASSword CENable val B 91 SYSTem PASSword CENable COMMAND Syntax Short Form SYST PASS CEN val Description Sets the password enable state if the value matches the current password This command allows other commands such as SAV 41 to operate SYST PASS CDIS Long Form SYSTem PASSword CDISable val 92 SYSTem PASSword CDlSable COMMAND Syntax Short Form SYST PASS CDIS val Description Clears the password enable state if the value matches the current password B 93 SYSTem PASSword STATe QUERY Short Form SYST PASS STAT Return Value int value 0 or 1 Syntax Description Returns a 1 if the password state is enabled or a 0 if it is disabled B 94 SYSTem SECurity IMMediate COMMAND Syntax Description B 22 SYST PASS STAT Long Form SYSTem PASSword STATe SYST SEC IMM Short Form SYST SEC IMM Long Form SYSTem SECurity IMMediate Initializes all NVRAM variable to factory defaults This includes all memory steps to be set to O volts 1 28 of full scale current overvoltage and overcurrent to be set to lomax 1096 time value to be set to 0 and next step equal to 0 It also initializes the power up state to have DC Output Control off see DCL Control PAR 3 5 2 The calibration password is reset per Table 4 2 Use master password see below If password has been lost Related Co
93. d NOTE For fast mode operation into a load interrupted by contactors or relays Arcing Load a small high frequency type capacitor may be required across the contacts of the interrupting device or the power supply output terminals or directly across the load terminals A ceramic disc capacitor 0 01u F has been found to be adequate to pre vent spurious triggering of the overvoltage circuit MANUAL CHANGE OVER SLOW FAST MODE The ATE power supply is normally delivered for operation in the slow mode By changing jumper connections at the rear of the power supply the user can convert from the slow mode to the fast mode or vice versa The following steps are illustrated in Figure 2 6 1 Remove Links 1 2 and 6 7 on TB201 This removes the output capacitor 2 Atthe rear panel loosen two screws and disconnect interconnection adapter A11 3 Gain access to A11 jumpers by removing two screws securing connector A11J1 to the shell 4 Remove jumper on adapter assembly A11 between J3 pins 1 and 2 5 Install jumpers between J3 pins 3 and 4 and between J3 pins 5 and 6 NOTE Spare jumpers located on J5 6 Reassemble PC card to A11 and reconnect A11 at rear panel ATE DMG 020613 k S Er Eo amp E oo oa 6 rcm 4100 2 5 y S D DC OUTPUT Sla oao I 3 4 5 8 9 Oa 38 GRD
94. d of OUTP OFF 150 String data error Invalid characters were detected in numeric entry Command Error bit 5 For example E 1 instead of E 1 or 4d3 instead of 4 3 203 Command protected Execution error bit 4 Command only valid in password Cenable state 22 1 Settings conflict Execution error bit 4 Invalid password from syst pass cen command 222 Data out of range Execution error bit 4 Value exceeds power supply rating 223 Data format error Execution error bit 4 Multiple decimals in digit Multiple E etc 224 parameter value Execution error bit 4 For example OUTP 2 instead of OUTP 1 241 Hardware missing Execution error bit 4 Requesting device 2 status INST NSEL 2 282 program name Execution error bit 4 Executing prog run without LIST SEQ command 301 Value bigger than limit Device Error bit 3 Requesting a time of 301 which is bigger than limit 311 Memory error Device Error bit 3 Power up NV RAM error 314 Save recall memory error Device Error bit 3 Using cell other than 1 41 for SAV and RCL 341 Non Volatile Mem CRC error Device Error bit 3 Power supply constants may be corrupted recali bration may be necessary 350 Queue overflow Query Error bit 2 More than 15 errors are in queue 410 Query interrupted Query Error bit 2 New command sent before data from previous query read Previous query data lost 430 Query Deadlocked Query Error bit 2 Over 255 chara
95. e 3 1 Six keys have dual functions depending on whether the power supply is in command entry status waiting for a command to be entered or data entry status waiting for a number to be entered Command entry status is indicted by a blinking colon and data entry status is indicated by a blinking equal sign ATE DMG 020613 NOTE Keys with dual functions are labeled with both a command and a number The com mand label is referred to when the unit is in command entry status the number is referred to when the unit is in data entry status TABLE 3 1 KEY FUNCTIONS POWER SUPPLY REFERENCE KEY STATUS ACTIVE DESCRIPTION PARAGRAPH If bottom line of LCD reads Output OFF press to enable the output If out 3 4 6 OUTPUT Command Entry put is on voltage and current measurements displayed on bottom line of ON OFF LCD press to disable the output Press to set output voltage After V SET is pressed previous setting is dis 3 4 8 V SET Command Entry played Data entry required to enter new value of output voltage press ENTER to accept displayed value Press to set output current After SET is pressed previous setting is dis 3 4 8 I SET Command Entry played Data entry required to enter new value of output current press ENTER to accept displayed value If the power supply is in remote mode keypad is disabled except for 3 4 3 LOCAL Command Entry
96. e corresponding Status Byte bit to set the RQS and MSS bits All the enabled Service Request Enable register bits then are logically ORed to cause Bit 6 of the Status Byte Register MSS RQS to be set Syntax grammed Description ple Figure A 1 A 4 FIGURE A 1 GPIB COMMANDS SRE Sets the condition of the Service Request Enable register The Service Request Enable register ATE DMG 020613 Related Commands SRE STB See exam TABLE A 3 SERVICE REQUEST ENABLE AND STATUS BYTE REGISTER BITS OPER Operation Status Summary Mss ERR MSS Master Status Summary CONDITION OPER ROS ESB MAV QUES QUE NU NU RQS Request for Service ESB Event Status Byte summary MAV Message available BIT 7 6 5 4 3 2 1 0 QUES QUEStionable Status Summary ERR QUE 1 or more errors occurred see VALUE 128 64 32 16 8 4 2 1 PAR B 84 NU Not Used 14 SRE SERVICE REQUEST ENABLE QUERY SRE Syntax SRE Response lt integer gt value from 0 255 per Table A 3 Description Reads the Service Enable Register Used to determine which events of the Status Byte Register are programmed to cause the power supply to generate a service request 1 set function enabled 0 reset function disabled Related Commands SRE STB See example Figure A 1 15 8782 STATUS BYTE REGISTER QUERY STB Syntax STB Response lt integer gt value from 0 to 255 per Table A 3 Description Reads S
97. ecl h char rd_str 80 Input buffer char dat_str 80 Output buffer int bd adr main adr ibfind DEV6 Open DEV6 defined by IBCONF bd ibfind GPIBO Open GPIB card ibsic bd Send Interface Clear ibsre bd 1 Set remote line true strcpy dat str VOLT 5 CURR 1 Define a set command streat dat_str r n Append delimiter ibwrt adr dat_str strlen dat_str Send string to power supply strcpy dat_str MEAS VOLT CURR Define a measure command streat dat_str r n Append delimiter ibwrt adr dat_str strlen dat_str Send string to power supply strset rd_str 0 Clear input buffer ibrd adr rd_str 64 Read result of measure printf received s n rd_str Print voltage and current FIGURE 3 10 TYPICAL EXAMPLE ATE DMG POWER SUPPLY PROGRAM USING SCPI COMMANDS 3 30 ATE DMG 020613 SECTION 4 CALIBRATION 4 1 GENERAL This section contains the calibration instructions for the Power Supply It is recommended that the user be familiar with Local Mode operation PAR 3 4 before calibrating the unit A full calibration consist of a voltage calibration and a current calibration Both voltage and cur rent calibrations consist of a zero and a full scale calibration There are two ways to perform the calibration locally using the front panel keys or remotely sending commands through the GPIB bus These two ways cannot be comb
98. ection and overcurrent protection can be stored in one of the 40 memory locations available for local programming see PAR 3 4 15 With the power supply in command entry status press STORE key The LCD reads STORE mem nn where nn is the memory location where the settings are to be stored Press ENTER or CLEAR to exit without changing setting Enter memory location from 1 to 40 and press ENTER The programmed voltage current overvoltage protection and overcurrent protection settings in effect when ENTER is pressed are stored in the selected memory location To recall stored settings see PAR 3 4 13 ATE DMG 020613 3 13 3 4 13 3 4 14 3 4 15 3 4 15 1 RECALLING STORED OUTPUT SETTINGS With the power supply in command entry status press RECALL The LCD reads RECALL mem nn where is the memory location holding the settings to be retrieved Press ENTER or CLEAR to exit without changing setting Enter memory location from 1 to 40 and press ENTER The stored settings for voltage current overvoltage protection and overcurrent protec tion replace the current values and the unit returns to command entry status ENABLING REMOTE ANALOG CONTROL The power supply may be controlled by external analog voltages see PAR 3 5 but the feature must be enabled first With the power supply in command entry status press MENU key until LCD reads Extern Ref Extern Ref Off and the bottom line reads 0 Of 1 0 E
99. ed commands are complete See exam ple Figure A 1 A 8 OPC OPERATION COMPLETE QUERY OPC Syntax Description A 2 OPC Return value 1 ASCII placed in output queue when power supply has completed operation Indicates when pending operations have been completed When all pending operations are com plete all previous commands have been executed and changes in output level have been completed 1 is placed in the Output Queue Subsequent commands are inhibited until the pending operations are completed OPC is intended to be used at the end of a command line so that the application pro gram can monitor the bus for data until it receives the 1 from the power supply Output Queue See example Figure A 1 ATE DMG 020613 A9 OPT OPTIONS QUERY OPT Syntax Description OPT Returns string determined by power supply model Causes the power supply to return an ASCII string which defines the functionality of the power supply The functionality is defined as follows STRING DATA MEANING CAL Support for CALibrate command is present Hardware switch controlling remote local is functional Unit can be used to take measurements in local RES mode but all other functions require the unit to be in remote mode REN must be asserted MEM Indicates the number of memory steps supported DSM Indicates the number of characters supported for user messages on LCD LST Indicates LI
100. egister The ABORt is executed each time power is turned on Related Commands INIT RST TRG See example Figure B 1 NOTE Power supply assumed to be operating in constant voltage mode OUTP ON Output enabled OUTP Power supply returns 1 output enabled VOLT 21 CURR 1 5 Power supply output programmed to go to 21V current limit 1 5A ON Continuous triggers enabled Power supply returns 1 VOLT TRIG 15 CURR TRIG 3 TRG VOLT 21 CURR 5E 2 Power supply output programmed to return to 15V current limit 3A upon receipt of trigger Power supply output returns to 15V current limit 3A Power supply output programmed to go to 21V current limit 0 05 MEAS VOLT If actual value of output voltage is 20 9V power supply returns 2 09E 1 MEAS CURR If actual value of output current is 0 0483A power supply returns 4 83E 2 FUNC MODE Returns VOLT if power supply operating in constant voltage mode CURR for constant current mode CURR TRIG Returns 3 current value established by CURR TRIG VOLT TRIG Returns 15 voltage value established by VOLT TRIG ABOR Pending trigger levels changed to 21V 0 05A immediate VOLT 17 CURR 2 values Power supply output programmed to go to 17V 2A TRG Power supply output returns to 21V current limit 0 05A INIT CONT 0 Triggers disabled Power supply returns 0 OUTP OFF Output disabled OUTP Retur
101. emains in local lock out until a SYST KLOC OFF command is received Related Commands SYST KLOCK See exam ple Figure B 8 88 SYSTem KLOCk QUERY SYST KLOC Syntax Short Form SYST KLOC Long Form SYSTem KLOCk Return Value lt int_value gt 0 or 1 Description Identifies whether keypad is locked or unlocked 0 keypad unlocked local operation possible by pressing LOCAL key 1 keypad locked LOCAL key disabled only remote operation possible Related Commands SYST KLOCK See example Figure B 8 B 89 SYSTem LANGuage QUERY SYST LANG Syntax Short Form SYST LANG Long Form SYSTem LANGuage Return Value lt string gt SCPI or COMP Description Identifies whether unit responds to older command formats SCPI means the unit will not respond to older formats such as LIST TIME COMP means the unit will respond to older formats such as LISTTIME for compatible operation with software written for ATE power supplies up to Revision 1 B 90 SYSTem LANGuage COMMAND SYST LANG Syntax Short Form SYST LANG COMP SCPI Long Form SYSTem LANGuage COMP SCPI Description Determines whether unit responds to older command formats Sending SYST LANG COMP causes the unit to respond to older formats such as LIST TIME for compatible operation with software written for ATE power supplies up to Revision 1 SYST LANG COMP has been selected at the factory to permit the VISA demonstration program which uses older command for mats to op
102. ent errors are discarded The last error in the queue will be 350 Too many errors Error messages are defined in Table B 4 ATE DMG 020613 B 19 85 SYSTem ERRor CODE QUERY SYST ERR CODE Syntax Short Form SYST ERR CODE Long Form SYSTem ERRor CODE Description Returns the three character error code without the ASCII definition string The error codes are defined in table B 4 See example Figure B 1 B 86 SYSTem ERRor CODE ALL QUERY SYST ERR CODE ALL Syntax Short Form SYST ERR CODE ALL Long Form SYSTem ERRor CODE ALL Return Value Description Returns a comma separated list of all error codes A maximum of 15 codes will be returned if the queue is empty the power supply returns O 87 SYSTem KLOCk COMMAND SYST KLOC Syntax Short Form SYST KLOC boolean Long Form SYSTem KLOCk boolean boolean 0 or OFF 1 or ON Description Locks ON or 1 or unlocks OFF or 0 the keypad With the keypad unlocked the power supply enters Remote mode as soon as a command or query is received Once in Remote mode with key pad unlocked the front panel keys are disabled with the exception of the LOCAL key which is used to return to Local mode After sending a SYST KLOC ON keypad lock command all front panel keys including LOCAL are disabled The power supply is now in the local lockout state Local lockout can also be entered by sending the GPIB lt LLO gt code hex 11 to the power supply The power supply r
103. er for voltage Sending SYST SET STR disables the special debug and troubleshooting commands Related Commands SYST PASS CEN the password must be enabled prior to saving the SYST SET configuration using the SAV41 command SAVA1 this command saves the configuration established by SYST SET and OUTP commands and restores it upon power up B 96 SYSTem VERSion QUERY SYST VERS Syntax Description Short Form SYST VERS Long Form SYSTem VERSion Return Value int value int value YYYY V Identifies SCPI Version implemented Returns SCPI Version number YYYY year V Revision number for specified year See example Figure B 8 SYST VERS Returns 2003 0 SYST KLOC ON keypad locked only remote control possible SYST KLOC Returns 1 indicating keypad locked SYST KLOC OFF keypad unlocked pressing LOCAL key allows Local mode operation SYST KLOC Returns 0 indicating keypad unlocked ATE DMG 020613 FIGURE B 8 USING SYSTEM COMMANDS AND QUERIES B 23 B 24 Blank
104. erate SYST LANG SCPI disables responses to older command formats B 20 ATE DMG 020613 TABLE B 4 ERROR MESSAGES ERROR MESSAGE ESR ERROR BIT SET EXPLANATION SEE PAR A 5 O No error None No error 100 Command error Command data understood but more informa Command Error bit 5 dice aeuo tion included which is not recognized 102 Syntax error Comand First 4 characters recognized subsequent charac ters not recognized 103 Invalid separator For example VOLT PROT received instead of Command Error bit 5 VOLT PROT 108 Parameter Not Allowed Error Command Error bit 5 Volt12 sequence channel number is invalid 109 Missing parameter Command Error bit 5 For example VOLT instead of VOLT 21 111 Header separator error Command Error bit 5 Missing space between volt and value or missing 113 Undefined header First 4 characters could not be identified as legal Command Error bit 5 command For example command VLT instead of VOLT 120 Numeric data error Expected number but other characters were Command Error bit 5 detected 121 Invalid character in number Command Error bit 5 Volt 1 500 comma not allowed 123 Exponent too large Command Error bit 5 Exponent E 3 or greater is invalid 141 Invalid character data Command Error bit 5 For example OUTP OFD or OUTP STOP instea
105. for setting and adjusting output voltage and current under local control The keypad s keys are organized to either directly execute commands or to introduce a program that can either be run once or cycled Calibration of the unit is facilitated by a password protected menu driven procedure from the front panel REMOTE CONTROL The ATE DMG Power Supply can be remotely controlled directly via the IEEE 488 2 GPIB bus using SCPI commands All features available in local mode can also be accessed remotely In ATE DMG OPER 020613 1 1 addition output voltage and current can also be controlled by external analog reference volt ages see PAR 3 5 TABLE 1 1 ATE DMG D C OUTPUT RATINGS AND OUTPUT IMPEDANCE d c OUTPUT RANGE OUTPUT IMPEDANCE VOLTAGE MODE OUPUT IMPEDANCE CURRENT MODE VOLTS AMPS SERIES R SERIES LY SHUNTR 0 SHUNT SLOW FAST SLOW FAST SIZE E FULL RACK 1000 Watt ATE 6 100DMG 0 6 0 100 1 2uQ 0 5uH 5uH 12kQ 22000uF 15uF ATE 15 50DMG 0 15 0 50 0 5uH 5uH 30kQ 12000uF 6uF ATE 25 40DMG 0 25 0 40 12 509 1uH 10uH 11000uF 4uF ATE 36 30DMG 0 36 0 30 2410 10uH 72kQ 9500uF 3uF ATE 55 20DMG 0 55 0 20 55uQ 2uH 20uH 110kQ 5200uF 2 25uF ATE 75 15DMG 0 75 0 15 0 1MQ 2uH 20uH 150kQ 3400uF 1 5uF ATE 100 10DMG 0 100 0 10 0 2MQ 4uH 40uH 200kQ 1200uF 0 75uF ATE 150 7DMG 0 150 0 7 0 42mQ 4uH 40uH 300kQ 1050uF 0 3uF
106. g time intervals from 0 01 to 2 50 seconds the unit will accept times that are accurate to 0 01 second e g 2 49 seconds For setting time intervals between 2 50 seconds and 50 seconds the second decimal place is ignored providing accuracy to 0 1 second e g entering 2 79 is accepted as 2 7 When the time interval is greater than 50 seconds the decimal is ignored and the time increment is in full seconds 3 4 15 1 3 DISPLAY PROGRAM OPTION 3 4 15 2 3 4 15 3 3 4 15 4 When running a program if the Display Program option is on the LCD will display the mode Loc Rem RunPg CV CC and active voltage and current values programmed if the Display Program option is turned off the LCD displays the message PROGRAM RUNNING Since the accuracy of the time intervals is affected by whether this option is on or off it is recom mended that this option be turned off when accurate time intervals are important otherwise this option should be turned on With the power supply in command entry status press MENU key 11 times The LCD top line reads DispPrg OFF Choosing ON displays the programmed values choosing OFF displays the PROGRAM RUNNING message Press ENTER or CLEAR to exit without changing setting Enter 0 OFF or 1 ON and press ENTER or CLEAR to menu RUNNING A PROGRAM With the power supply in command entry status press RUN key The LCD bottom line indi cates the start address of the program Press ENTER
107. gt After the OPER COND message unit the parser moves in one level from OPER allowing the abbreviated notation for STAT OPER ENAB ATE DMG 020613 3 7 6 PROGRAM MESSAGE SYNTAX SUMMARY Common commands begin with an asterisk Queries end with a question mark Program messages consist of a root keyword and in some cases one or more message units separated by a colon followed by a message terminator Several message units of a program message may be separated by a semicolon without repeating the root keyword If a program message has more than one message unit then a colon must precede the next keyword in order to set the parser back to the root otherwise the next keyword will be taken as a subunit of the previous message unit e g the command meas volt curr will read output voltage and output current since both volt and curr are interpreted as subunits of the meas command Several commands may be sent as one message a line feed terminates the message Commands sent together are separated by a semicolon The first command in a mes sage starts at the root therefor a colon at the beginning is not mandatory e g the command meas volt curr will read output voltage and programmed cur rent since the colon preceding curr indicates that curr is not part of the meas com mand and starts at the root UPPER case letters in mnemonics are mandatory short form Lower case letters may either be
108. gure 3 2 the links are connected for local error sensing Links on the barrier strip must be tightened LOOSE LINKS AT THE BARRIER STRIP WILL CAUSE MALFUNCTION OF THE POWER SUPPLY ATE DMG 020613 3 3 OC OUTPUT TB 29 E 8 9 2 3 4 5 6 7 2S M GRD M Co GROUNDING NETWORK AM TO AC INPUT SOURCE t FULL RACK AC INPUT FULL RACK FIGURE 3 2 STANDARD JUMPER LINK CONNECTIONS FOR LOCAL FRONT PANEL CONTROL OF 3 2 2 3 4 OUTPUT VOLTAGE OUTPUT CURRENT AND VP CROWBAR LEVEL SLOW MODE Note Connection diagrams in Section 3 are applicable for full rack ATE power supplies These diagrams represent partial views of the ATE rear panel The AC source input interconnection adapter assembly A11 and the GPIB connector are deleted to simplify the presentation LOAD CONNECTION METHOD I LOCAL ERROR SENSING SEE FIGURE 3 3 The most basic power supply interconnection to primarily resistive relatively constant loads located close to the power supply or for loads requiring stabilized current exclusively consists of a 2 wire connection from the rear output terminals Load wire is selected as described previ ously refer to PAR 3 1 3 1 The load leads should be tightly twisted to reduce pick up from stray magnetic fields After the grounding rules have been applied refer to PAR s 3 1 1 to 3 1 2 the power supply can be connected to the
109. ilizer or for high speed voltage or current programming PRECAUTIONS The output capacitor and to a lesser extent the feedback capacitor of a power supply control the programming speed and the current mode recovery time The removal of these capacitors in the fast mode results in greatly improved power supply performance in these areas The power supply s dynamic stability however is reduced making the output sensitive to the load phase angle For this reason the load presented to the power supply in the fast mode must not contain excessive capacitance limit 1000pF Also with the output and main feedback capacitors removed there will be an increase in output noise mainly high frequency noise and pickup so that external shielding of programming leads and good grounding practices assume added importance in the fast mode of operation LAG NETWORK ADJUSTMENT The ATE power supply operating in the fast mode is dynamically stabilized by means of an internal lag network LAG R27 see Figure 2 3 for location This control should be adjusted for each application by monitoring the load with an oscilloscope and turning the LAG control for best output response and maximum dynamic stability under all operating conditions CROWBAR OPERATION FAST MODE The crowbar circuit in the ATE power supply is not completely removed in the fast operating mode but continues to offer protection against d c voltage surges which may harm the loa
110. in Current Mode 5 Keypad Used to for digital control of all local functions See PAR 3 4 1 4 for details 6 DISARM pushbutton Push to set Crowbar trigger level 7 CROWBAR indicator Lights when crowbar is triggered ON 8 LEVEL control Adjusts trigger level of crowbar circuit ATE DMG 020613 2 1 OUTPUT KEPCO POWER SUPPLY X FIGURE 2 1 oor ISET LOCAL OE Cd 9 pum EDT STEP TIME RUN noc 5 6 RECALL 1 2 3 z T E jol gt R FRE EI cig 23 CROWBAR o Sf LEVEL DISAI ATE DMG FULL RACK SERIES FRONT PANEL ATE DMG 020613 TABLE 2 2 REAR PANEL TERMINATIONS FIGURE 2 2 INDEX NO TERMINATION FUNCTION 1 GPIB IEEE 488 Interface Allows digital control of power supply and provides digital indication of status and connector power supply output See Table 2 4 for input output pin assignments 2 Interconnection Assembly Used to gain access to internal circuitry for fast mode conversion troubleshooting and parallel serial connections Can also be used with PC 12 connector wired for troubleshooting 3 Rear Panel Barrier Strip Nine terminals provided 1 7 and used to connect external output capacitor 2 6
111. in the above example location 14 3 4 15 6 STOPPING A PROGRAM To set up a program to stop after running once set the NEXT STEP address of the last memory location to be executed to 0 For example with the power supply in command entry status press EDIT PROG Enter the last memory location you want executed e g 14 then press ENTER Press gt key until LCD reads ViewvAL Mem14 NEXT STEP Enter 0 and press ENTER The program will now stop after memory location 14 is executed 3 4 15 7 STOPPING A RUNNING PROGRAM There are three ways to stop a program that is running Press CLEAR key the program immediately stops at the step location that was being executed when the key was pressed The power supply output remains at the values specified by that step Press RESET key The program stops and power on defaults are restored see PAR 3 4 7 Press OUTPUT ON OFF key the output is disabled programmed to zero and the pro gram immediately stops at the step location that was being executed when the key was pressed Pressing the OUTPUT ON OFF key again restores the output to the values specified by the step in effect when the program was stopped 3 4 15 8 SAMPLE PROGRAM Table 3 3 shows a sample program designed to cycle continuously if the NEXT STEP value for location 3 is set to 00 the program will run once and stop TABLE 3 3 SAMPLE PROGRAM MODEL ATE 25 40DMG OCset OV set MEMORY ISET
112. ined In order to enter the calibration mode the correct calibration access code password must be entered If the password has been forgotten call the factory and a secret password which has been assigned to your power supply will be provided During the calibration new calibration data is computed which is then stored in the nonvolatile memory 4 2 EQUIPMENT REQUIRED The following equipment is required to calibrate the ATE DMG Power Supply Digital Voltmeter DVM with 6 digits d c accuracy Shunt Resistor During the calibration procedure the LCD displays the minimum require ments for the shunt resistor However to avoid problems due to drift caused by heat dis sipation at higher power levels Kepco recommends the items listed in Table 4 1 TABLE 4 1 SUGGESTED SENSE RESISTORS MODEL VALUE KEPCO PART NO MANUFACTURER MANUFACTURER PART NO ATE 6 100DMG ATE 15 50MG ATE 25 40MG 0 001 OHM 115 3033 ISOTEK RUG Z R001 0 1 TK10 ATE 35 30MG ATE 55 20MG ATE 75 15MG ATE 400 40MG 0 01 OHM 115 2997 ISOTEK RUG Z R010 0 1 TK10 ATE 150 7MG NOTE ALL SENSE RESISTORS MUST BE MOUNTED ON A HEATSINK WITH A MINIMUM SURFACE AREA OF 36 SQUARE INCHES TO MAINTAIN THERMAL STABILITY DURING CALIBRATION FORCED CCOOLING IS RECOMMENDED KEPCO HEATSINK P N 136 0451 WILL PROVIDE ADQUATE COOLING FOR THE SENSE RESISTOR 4 3 NOTE Because the voltage measured will be used as reference for calibration the DVM used must be accurately calibrated
113. ing as close as possible to full scale value without exceeding full scale value E g for ATE 25 40DMG adjust for DVM reading as close to 25 000V as possible Press ENTER when com plete CURRENT CALIBRATION NOTE Refer to Figure 2 3 for location of internal power supply controls ATE DMG 020613 1 LCD reads CONNECT TO SHUNT Connect Precision Shunt across output and terminals of power supply and connect DVM to sense terminals of shunt Press ENTER when connections are complete NOTE During calibration the gt increase decrease keys are used for fine adjust ments If necessary use the 1 decrease and 3 increase keys for coarse adjust ment then use the gt keys 2 With LCD reading Iout ZERO adj monitor DVM and use gt keys to increase or decrease output current as necessary to get DVM reading as close to zero as possible with out going to negative value If unable to reach zero adjust l ZERO control as necessary Press ENTER when complete 3 LCD will flash rout F S adj WAIT then Iout F S adj lt gt Monitor DVM use gt keys to increase or decrease output voltage as necessary to get DVM reading as close as possible to value listed below without exceeding value listed NOTE If LCD reads CAN T ADJUST FULL SCALE adjust control R18 for current equal to lomax Depress ENTER and RESET then restart current calibration ATE 6 10
114. ing SCPI Commands 3 30 Cla Here uu Dtwee c A 4 Programming the Output u B 2 Using Calibration Commands and B 3 Using Display Commands 1 roe adeo de Reed e d ee ede e dede e e B 6 Using LIST Commands and B 8 Programming Current Programming Voltage Using Status Commands and B 18 Using System Commands and Queries enne B 23 ATE DMG020613 LIST OF TABLES TABLE TITLE PAGE 1 1 ATE DMG D C Output Ratings and 1 2 1 2 ATE DMG Series Specifications eiiiai dedede 1 2 1 3 ATE Dynamic Specifications Resistive Load nnne 1 4 1 4 Overvoltage Overcurrent Settings 1 4 1 5 ATE Static SpecifiCations ai A ai 1 5 ILE erg m 1 6 1277 Symbols End oit eei 1 7 2 1 Front Panel Controls Indicators and Terminations nennen nnns 2 1 2 2 RearPanel Terminations rere tre
115. irable because Kepco s digital auto crossover supplies employ two separate feedback loops Each time there is a potential mode change there is always an uncontrolled period of a few millisec onds while the two feedback loops compete for control of the output By changing only the active parameter e g voltage for voltage mode there is no doubt as to what the operating ATE DMG 020613 3 21 3 7 3 7 1 3 7 2 3 7 3 3 22 mode will be so the unit is never uncontrolled response is quick and no transients are possible Recommended programming techniques are 1 Minimize programmed mode voltage or current changes Unless absolutely required by the test parameters allow the power supply to automatically switch modes as determined by the load This will improve response time and reduce undesirable transients For those power supplies that employ relays Kepco s MBT with R option MAT and MST this will also increase the life of the relay 2 Once the mode voltage or current is programmed program the active parameter to zero and the complementary limit parameter to the maximum anticipated for application Then program only the active parameter The active parameter is the parameter that controls the output e g voltage controls the output in voltage mode 3 Never program both the active and complementary limit parameter to zero This can result in long response times Set the active parameter to zero and the complementary li
116. key to run the program starting with that address To change the starting address enter new value and press ENTER to run the pro gram Press CLEAR to exit without running the program STEPPING THROUGH A PROGRAM The STEP function is useful for examining a program that has just been created or edited before running in real time With the power supply in command entry status press STEP key The LCD bottom line indicates the start address of the program press ENTER to begin stepping at that address To change the starting address enter new value and press ENTER to begin step ping at the new address press CLEAR to exit without stepping through the program The LCD top line shows Loc to indicate local mode aabb where is the memory location just executed bb is the NEXT STEP location and shows cv constant voltage or cc constant current to indicate the actual operating mode The LCD bottom line shows the output voltage and current measurements for the location just executed and indicates command status Press STEP to execute location bb The LCD will again display the location just executed volt age and current measurements and the NEXT STEP location Continue to press STEP to exe cute the program one step at a time or press CLEAR to exit Step function CYCLING A PROGRAM To cycle a program modify the program see PAR and go to the last memory location to be executed and set the NEXT STEP address to the Starting address causi
117. limit must be reprogrammed to be lower than the new limit other wise triggers will cause the output to exceed the new limit Once the limit is established the unit will not accept trigger values higher than the programmed limit Related Commands CURR See exam ple Figure B 5 53 SOURce CURRent LIMit HIGH Query CURR LIM HIGH Syntax Short Form SOUR CURR LIM HIGH Long Form SOURce CURRent LIMit HIGH Return Value exp value digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Returns value representing current limit set by CURR LIM HIGH command Related Commands CURR LIM HIGH CURR See example Figure B 5 B 12 ATE DMG 020613 54 SOURce CURRent LEVel MODE COMMAND CURR MODE Syntax Short Form SOUR CURR LEV MODE FIX EXT Long Form SOURce CURRent MODE FlXed EXTernal Description Establishes whether control of the output current is via keypad or GPIB commands FIXED or via external analog 0 to 1V reference EXTERNAL Setting is stored in NVRAM and retained upon subsequent power up B 55 SOURce CURRent LEVel MODE QUERY CURR MODE Syntax Short Form SOUR JCURR LEV MODE Long Form SOURce CURRent LEVel MODE Return Value FIXED or EXTERNAL Description Returns FIXED or EXTERNAL depending on whether current control is from the keypad or GPIB interface FIXED or from an external analog reference voltage EXTERNAL B 56 SOURce CURRent PROTection LE
118. located at the top left corner of the diagram The parser goes to the root if amessage terminator is recognized by the parser aroot specifier is recognized by the parser Optional keywords are enclosed in brackets for identification optional keywords be omit ted and the power supply will respond as if they were included in the message The root level keyword SOURCe is an optional keyword Starting at the root there are various branches or paths corresponding to the subsystems The root keywords for the ATE DMG Power Supply are ABORt CALibrate DISPlay INITiate LIST MEASure OUTPut SOURce STATus SYSTem and TRIGger Because the SOURce keyword is optional the parser moves the path to the next level so that VOLTage CURRent and FUNCtion commands are at the root level Each time the parser encounters a keyword separator the parser moves to the next indented level of the tree diagram As an example the STATus branch is a root level branch that has three sub branches OPERation PRESet and QUEStionable The following illustrates how SCPI code is interpreted by the parser STAT PRES lt NL gt The parser returns to the root due to the message terminator STAT OPER PRES lt NL gt The parser moves one level in from STAT The next command is expected at the level defined by the colon in front of OPER Thus you can combine the following message units STAT OPER and STAT PRES STAT OPER COND ENAB 16 lt NL
119. lues can be restored 1 If the unit is not in command entry status press CLEAR or RESET to put the unit in com mand entry status Press MENU key six times LCD reads GoTo Previous CALIB 1 Press 1 then ENTER LCD reads Calibration PassWord Enter 4 digit password and press ENTER Previous calibration values are restored 4 6 RESTORING FACTORY CALIBRATION VALUES The original factory calibration values can be restored 1 4 4 If the unit is not in command entry status press CLEAR or RESET to put the unit in com mand entry status Press MENU key seven times LCD reads GoTo Factory CALIB 1 Press 1 then ENTER LCD reads Calibration PassWord Enter 4 digit password and press ENTER Factory calibration values are restored ATE DMG 020613 APPENDIX IEEE 488 2 COMMAND QUERY DEFINITIONS INTRODUCTION This appendix defines the IEEE 488 2 commands and queries used with the ATE Power Supply These commands and queries are preceded by an asterisk and are defined and explained in Fig ures A 1 through A 14 arranged in alphabetical order Table A 1 provides a quick reference of all IEEE 488 2 commands and queries supported in the ATE Power Supply TABLE A 1 IEEE 488 2 COMMAND QUERY INDEX COMMAND PAR COMMAND PAR CLS 2 RST ESE A3 A4 SAV 12 ESR 5 SRE 2 A 13 A 14 IDN A 6 STB A 15 OPC A 7 A 8 TRG A 16 OPT A
120. mit parame ter to a minimum e g 1096 of maximum to ensure that the active mode is defined SCPI PROGRAMMING SCPI Standard Commands for Programmable Instruments is a programming language con forming to the protocols and standards established by IEEE 488 2 reference document Std 488 2 IEEE Standard Codes Formats Protocols and Common Commands SCPI commands are sent to the ATE DMG Power Supply as ASCII output strings within the selected programming language PASCAL BASIC etc in accordance with the manufacturer s require ments for the particular GPIB controller card used Different programming languages e g BASIC C PASCAL etc have different ways of repre senting data that is to be put on the IEEE 488 bus It is up to the programmer to determine how to output the character sequence required for the programming language used Address infor mation GPIB address must be included before the command sequence See PAR 3 6 3 to establish the ATE DMG Power Supply GPIB address SCPI MESSAGES There are two kinds of SCPI messages program messages from controller to power supply and response messages from the power supply to the controller Program messages consist of one or more properly formatted commands queries and instruct the power supply to perform an action the controller may send a program message at any time Response messages consist of formatted data the data can contain information regarding operating
121. mmands SYST PASS CEN must be sent prior to this command TABLE B 5 MASTER PASSWORDS MODEL PASSWORD MODEL PASSWORD MODEL PASSWORD ATE 6 ATE 36 ATE 100 100DMG 30DM 44 10DMG 78 15 55 150 50DMG 26 20DMG 52 7DMG 86 25 75 40DMG 35 15DMG 69 020613 B 95 SYSTem SET COMMAND SYST SET Syntax Description Short Form SYST SET CM1 DCO DC1 LFO LF1 STR RLX Long Form SYSTem SET CM1 DCO DC1 LFO LF1 STR RLX Sending SYST SET CM1 sets the unit to operate in compatible mode and have all GPIB functions compatible with software version 1 2 and lower units Sending SYST SET sets the unit to be fully SCPI 1997 compliant Sending SYST SET DC1 causes Device Clear to be identical to RST command Sending SYST SET DCO causes Device Clear to have no effect on output voltage output current or output on off state Sending SYST SET LF1 causes the power supply to respond with line feed if read occurs with output buffer empty Sending LFO causes the power not to send a line feed if read occurs with output buffer empty SCPI 1997 compliant Sending SYST SET RLX allows the power supply to accept special debug and troubleshooting com mands for KEPCO use only e g after sending SYST SET RLX the power supply will respond to the vda command by returning the value of the internal D A convert
122. n Complete CONDITION PON NU CME EXE DDE QUE NU OPC BIT 7 6 5 4 3 2 1 VALUE 128 64 32 16 8 4 2 1 4 ESE STANDARD EVENT STATUS ENABLE QUERY ESE Syntax Description ESE Return value Integer gt value per Table A 2 Returns the mask stored in the Standard Event Status Enable Register Contents of Standard Event Status Enable register 5 determine which bits of Standard Event Status register 5 are enabled allowing them to be summarized in the Status Byte register STB All of the enabled events of the Standard Event Status Enable Register are logically ORed to cause ESB bit 5 of the Status Byte Register to be set 1 set enable function 0 reset disable function See example Figure A 1 A 5 ESR EVENT STATUS REGISTER QUERY ESR Syntax Description ESR Return value integer Value contents of Event Status register as defined in Table A 2 Causes the power supply to return the contents of the Standard Event Status register After it has been read the register is cleared The Standard Event Status register bit configuration is defined in Table A 2 1 set 0 reset The error bits listed in Table A 2 are also related to error codes produced during parsing of messages and to errors in the power supply See example Figure A 1 6 IDN IDENTIFICATION QUERY IDN Syntax Description IDN Return value
123. nds LIST IND LIST IND LIST VOLT See example Figure B 4 B 40 MEASure SCALar CURRent DC QUERY MEAS CURR Syntax Short Form MEAS SCAL CURR DC Long Form MEASure SCALar CURRent DC Return Value num value digits with decimal point and Exponent Description Measures actual current This query returns the actual value of output current measured at the out put terminals as determined by the programmed value of voltage and current and load conditions NOTE The SCPI convention for this command allows the controller to establish the range and accu racy of the measurement if nn nn is added after the question mark the power supply accepts this for mat but sets the command warning bit 13 in the status questionable register and ignores the extra characters See example Figure B 1 41 MEASure VOLTage SCALar DC QUERY MEAS VOLT Syntax Short Form MEAS SCAL VOLT DC Long Form MEASure SCALar VOLTage DC Description Measures actual voltage This query returns the actual value of output voltage measured at the out put terminals as determined by the programmed value of voltage and current and load conditions NOTE The SCPI convention for this command allows the controller to establish the range and accu B 10 ATE DMG 020613 racy of the measurement if nn nn is added after the question mark the power supply accepts this for mat but sets the command warning bit 13 in the status questionable regi
124. nds If delay is programmed overcurrent overvoltage protection trips only if condition still present at end of delay A count of 0 means no delay the maximum delay possible is 8 50 seconds B 45 OUTPut PROTection DELay QUERY OUTP PROT DEL Syntax Short Form OUTP PROT DEL Long Form OUTPut PROTection DELay Return Value lt integer 1 to 8 5 gt Description Returns value of overvoltage overcurrent delay A count of 0 means no delay The maximum value is 8 5 The delay constants are set in 033 milliseconds per internal value Related Commands OUTP PROT DEL See example Figure B 5 46 PROGram SELect STATe COMMAND PROG SEL STAT Syntax Short Form PROG SEL STAT RUN STOP Long Form PROGram SELect STATe RUN STOP Description Starts or stops user programmed sequence Program sequence is preprogrammed using LIST commands starting address is established by LIST SEQ STAR When PROG SEL STAT command is executed the keyboard is locked until the program stops running RST command aborts a program that is running Related commands PROG SEL STAT LIST CURR LIST CURR PROT LIST VOLT LIST VOLT PROT LIST DWEL LIST SEQ NEXT LIST SEQ STAR 47 PROGram SELect STATe QUERY PROG SEL STAT Syntax Short Form PROG SEL STAT Long Form PROGram SELect STATe Return value boolean 0 stopped 1 running Description Indicates status of user programmed sequence 1 returned when program is running 0 returned when program is
125. ng the program to loop and repeat indefinitely For example if the last location is 14 and the starting location is 05 ATE DMG 020613 3 15 press EDIT PROG enter 14 then press ENTER Press until LCD reads ViewVAL Mem14 NEXT STEP Enter 5 and press ENTER When the program runs it will start at location 05 continue to 14 then loop back to the location 05 and repeat indefinitely TABLE 3 2 MEMORY LOCATION WORKSHEET MEMORY LOCATION I SET Current A V SET Voltage V OCset Overcurrent Protection A OV set Overvoltage Protection V TIMEval 0 to 300 Sec Sec NEXT STEP Next location to execute ATE DMG 020613 3 4 15 5 RUNNING A PROGRAM ONCE To set up a program to stop after running once modify the program see PAR and go to the last memory location to be executed and set the NEXT STEP address to 0 For example with the power supply in command entry status press EDIT PROG Enter the last memory location you want executed e g 14 then press ENTER Press gt key until LCD reads ViewVAL Mem14 NEXT STEP Enter 0 and press ENTER The program will now stop after memory location 14 is executed When the program stops the power supply will continue to provide the output specified by the last location
126. ns 0 output disabled MEAS VOLT Returns 0 measured output voltage VOLT Returns 17 programmed output voltage CURR Returns 1 5 programmed current CURR MAX Returns 10 assuming maximum allowable current for power supply being addressed is1 10A i e ATE 100 10DMG CURR MIN Returns 0 minimum allowable current CURR PROT 2 6 CURR CURR PROT CURR PROT MAX SYST VERS Current protection set to 2 6A Returns 1 5 indicating programmed current value 1 5A Returns 2 6 indicating programmed overcurrent protection current value 2 6A For ATE 100 10DMG returns 11A see Table 1 2 Returns 2003 0 FIGURE B 1 PROGRAMMING THE OUTPUT ATE DMG 020613 CAL CURR LEV Long Form CALibrate CURRent LEVel MIN MAX CALibrate CURRent LEVel COMMAND Syntax Short Form CAL CURR LEV MIN MAX Description Selects Current calibration only effective with power supply in Calibrate status CAL CURR LEV MIN selects Current Zero Calibration CAL CURR LEV MAX selects Current Full Scale Calibration Normally Current Zero is done first then Current Full Scale Calibration Related Commands CAL STAT CAL PASS CAL VOLT CAL CURR CAL ZERO CAL SAVE See example Figure B 2 4 CALibrate CURRent DATA COMMAND CAL CURR Syntax Short Form CAL CURR DATA 0 1121 3 Long Form CALibrate CURRent DATA 0 1 2 3 Description Increases or decreases output current during calibration only CAL CURR DA
127. nter 1 enable or 0 disable then press ENTER to enable or disable the feature Refer to PAR 3 5 for using this feature LOCAL MODE PROGRAMMING OF THE POWER SUPPLY Local mode programming offers the user 40 memory locations that can be used to program the power supply Each location defines values for output voltage output current overcurrent pro tection overvoltage protection time duration between 0 1 and 2 5 seconds for the pro grammed settings and the address of the next memory location in the program NOTE When programming sequential voltage levels it is important to set the Overvoltage to accommodate the highest voltage of the sequence Otherwise when going from higher to lower voltage levels the overvoltage protection will trip and shut down the unit CREATING OR MODIFYING A PROGRAM PROGRAM EDIT MODE Creating a program and modifying an existing program are identical except that a program mod ification requires only selected parameters to be changed rather than all new parameter values With the power supply in command entry status press EDIT PROG key The top line indicates the STARTaddr nn where nn is one of 40 memory location To select a different address enter new value and press ENTER The top line of the LCD indicates the active memory location e g ViewVAL Mem n where n is the memory location previously chosen The bottom line of the LCD indicates the parameter on the left Iset Vset OVset OCset T
128. oltage set to zero output current set to a minimum value ATE DMG 020613 3 11 3 4 8 3 4 9 1 2 of l max overcurrent and overvoltage protection set to the maximum values per Table 1 4 The power supply remains in command entry status SETTING OUTPUT VOLTAGE OR CURRENT V SET and SET set output voltage and current limit respectively when the unit is in constant voltage CV mode and set voltage limit and output current respectively when the unit is in con stant current CC mode The mode CV or CC is determined by the load together with the pro grammed settings As long as the voltage across the load produces a current that is less than or equal to the I SET value the unit operates in CV mode voltage programmed to V SET value current limited by SET value If the load changes to the point that current through the load reaches the 1 SET value the unit automatically enters CC mode current programmed to 1 SET value voltage limited by V SET value With the power supply in command entry status press V SET voltage or I SET current key to put the power supply in data entry status The lower right side of the LCD shows the pro grammed setting in effect when the key is pressed Press ENTER or CLEAR to exit without changing setting Enter new value key erases data just entered and press ENTER to accept new setting or CLEAR to exit without changing setting With the power supply in command entry status an
129. onable Event register clears it See example Figure B 7 TABLE B 3 QUESTIONABLE EVENT REGISTER QUESTIONABLE CONDITION REGISTER AND QUESTIONABLE CONDITION ENABLE REGISTER BITS CONDITION Ny Oe 22 OC OVERCURRENT PROTECTION TRIPPED BIT 15 2 1 0 OV OVERVOLTAGE PROTECTION TRIPPED NU NOT USED VALUE 32 768 4 2 1 B 81 STATus QUEStionable CONDition QUERY STAT QUES COND Syntax Short Form STAT QUES COND Long Form STATus QUEStionable CONDition Return Value lt int_value gt actual register value Description Returns the value of the Questionable Condition Register see Table B 3 The Questionable Condition Register contains unlatched real time information about questionable conditions of the power supply Bit set to 1 condition active true bit reset to 0 condition inactive false See example Figure B 7 B 82 STATus QUEStionable ENABle COMMAND STAT QUES ENAB Syntax Function Short Form STAT QUES ENAB int value Long Form STATus QUESionable ENABle int value Programs Questionable Condition Enable Register Description Programs Questionable Condition Enable Register see Table B 3 The Questionable Condition Enable Register determines which conditions are allowed to set the Questionable Condition Register itis a mask for enabling specific bits in the Questionable Event register that can cause the question able summary bit bit 3 of the Status Byte register to
130. or message 222 Data out of range is posted in output queue If value exceeds CURR LIM HIGH value a value corresponding to the current limit will be programmed Related Commands CURR See example Figure B 1 B 61 SOURce CURRent LEVel TRIGgered AMPlitude QUERY CURR TRIG Syntax Short Form SOUR JCURR LEV TRIG AMP Long Form SOURce CURRent LEVel TRIGgered AMPlitude Return Value exp value digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Returns the current value established by CURR TRIG command See example Figure B 1 62 SOURce VOLTage L EVel IMMediate AMPlitude COMMAND VOLT Syntax Short Form SOUR VOLT LEV IMM AMP exp value Long Form SOURce VOLTage LEVel MMediate AMPlitude exp value exp value digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Sets programmed voltage level at power supply output This command programs output voltage to a specific value actual output voltage will depend on load conditions If the value exceeds the max imum for the model being programmed error message 222 Data out of range is posted in output queue If value programmed exceeds the VOLT LIM HIGH value a value corresponding to the voltage limit will be programmed Related Commands RCL SAV VOLT LIM HIGH See example Figure B 1 B 14 ATE DMG 020613 63 SOURce VOLTage LEVel IMMediate AMPlitude QUERY VOL
131. orm LIST SEQ NEXT lt int_value gt 0 to 40 Long Form LIST SEQuence NEXT lt int_value gt 0 to 40 Description Determines the next memory location to be addressed during a programmed sequence Sets sequence number from 1 to 40 of next memory location to be addressed Sequence number is set for memory location selected by LIST IND Setting sequence number to 0 indicates the end of the pro gram chain and the programmed sequence will stop The sequence number is stored in non volatile memory and is retained when the power supply is turned off Related Commands LIST IND LIST IND LIST SEQ See example Figure B 4 B 33 SOUR LIST SEQuence NEXT QUERY LIST SEQ NEXT Syntax Short Form LIST SEQ NEXT Long Form LIST SEQuence NEXT Return Value lt int_value gt 0 to 40 Description Returns sequence number stored in memory location selected by LIST IND Related Com mands LIST IND LIST IND LIST SEQ See example Figure B 4 34 SOUR LIST SEQuence STARt COMMAND LIST SEQ STAR Syntax Short Form LIST SEQ STAR lt int_value gt 1 to 40 Long Form LIST SEQuence STARt lt int_value gt 1 to 40 Description Determines the first memory location start of sequence to be addressed during a pro grammed sequence Sets memory location from 1 to 40 of first memory location to be addressed when a program chain of memory locations is executed This is the start address for the STEP and RUN commands LOCal mode The starting
132. rol may be adjusted very close to the operating voltage minimum threshold 2 of rated output voltage or 0 5 volt whichever is greater The operation of the crowbar circuit can be checked without actually trig gering the crowbar All operating controls are accessible at the front panel refer to Section 2 Figure 2 1 SETUP AND CHECK PROCEDURE 1 Without connecting the load to the power supply turn Crowbar LEVEL control fully clockwise 2 Turn A C POWER SWITCH CIRCUIT BREAKER on Press VSET key then use the keypad to enter the desired value at which the crowbar must trigger NOT to the actual operating voltage then press ENTER 3 Depress the DISABLE button and keep it depressed white turning the LEVEL control coun terclockwise until the crowbar INDICATOR energizes simulated crowbar action 4 With the DISABLE button still depressed press VSET key then use the keypad to enter the actual operating voltage and press ENTER key Release the DISABLE button NOTE This last adjustment established the threshold i e the difference voltage between the output voltage and the voltage at which the power supply will crowbar For minimum false triggering use the largest threshold your load can tolerate 5 To check the adjusted crowbar trigger level depress DISARM push button Press VSET key then use the keypad to enter the voltage trip point minus 1 then press ENTER 6 Depress the gt key and note the voltage a
133. ry 5 ce n ecd ded d dee dee GR HR Red Ere esses B 6 B 16 DISPlay MODE Commande esnada a a a nennen nnn nnn B 6 B 17 DISPlay MODE Query nennen enne trennen nnne tret A O nnne B 6 B 18 DISPlay TEXT sse eene T trennen tentent nennen B 6 B 19 DISPIayzTEXT EDI eant en B 6 B 20 INITiate IMMediate Command 22 22 2 1 1 02 00000000 1 00 000000000000 nnne rennen nnns B 7 B 21 INITiate CONTinuous Command sss enne tenerent etr nnne nnn nnn nnns B 7 B 22 INITiate CONTinuous enne trennen tnter B 7 ATE DMG020613 iii SECTION B 23 B 24 B 25 B 26 B 27 B 28 B 29 B 30 B 31 B 32 B 33 B 34 B 35 B 36 B 37 B 38 B 39 B 40 B 41 B 42 B 43 B 44 B 45 B 46 B 47 B 48 B 49 B 50 B 51 B 52 B 53 B 54 B 55 B 56 B 57 B 58 B 59 B 60 B 61 B 62 B 63 B 64 B 65 B 66 B 67 B 68 B 69 B 70 B 71 B 72 B 73 B 74 B 75 B 76 B 77 B 78 B 79 TABLE OF CONTENTS PAGE INSTrument STATe Command sss eene tentent rnnt nennen B 7 EISECURRentGComnmland ree Re eese te feet cepe recipe Re B 7 SOUR LIST CURRent sss B 7 SOUR LIST CURRent PROTect 022 0000 000100000000 nennen B 8 SOUR LIST CURRent PROTect 2 2 00 0 1100000000000000000000 B 8 SOUR LIST DWE
134. ry must be considered in selecting the interface wiring LOAD WIRE SELECTION The stabilized d c power supply is definitely not an ideal voltage or current source with zero out put impedance VOLTAGE MODE or infinite output impedance CURRENT MODE at all fre quencies All voltage sources have some amount of impedance which increases with frequency and all current sources have an output impedance which decreases with frequency refer to Fig ure 3 1 VOLTAGE MODE IMPEDANCE INCREASING Zo DUE TO OUTPUT CIRCUIT INDUCTANCE N CURRENT MODE IMPEDANCE DECREASING Zo WITH FREQUENCY DUE TO OUTPUT CAPACITOR FREQUENCY FIGURE 3 1 TYPICAL OUTPUT IMPEDANCE VS FREQUENCY PLOT FOR STABILIZED D C SOURCES 3 2 ATE DMG 020613 NOTE Load connections for application requiring solely stabilized output current are not as critical as those requiring stabilized output voltage a D C wire drops do not influence the current stabilizing action but must be sub tracted from the available compliance voltage b Wire inductance is swamped out by the action of the output capacity Emphasis in the following paragraphs is therefore placed on the power supply as a voltage source rather than a current source A more realistic model for a voltage stabilized power supply must for example include a series resistance representing the small d c and low frequency source impedance in series with an inductance representing the source imped
135. ry status 3 Enter password 4 digits and press ENTER If password is incorrect WRONG PASS WORD flashes then LCD returns to command status See PAR 4 4 to change the pass word 4 f password is correct LCD reads VOLTAGE CALIB Enter 1 for voltage calibration see PAR 4 3 1 enter 0 to proceed to current calibration 5 LCD reads CURRENT CALIB Enter 1 for current calibration see PAR 4 3 2 enter 0 to exit Calibration mode VOLTAGE CALIBRATION NOTE Refer to Figure 2 3 for location of internal power supply controls 1 With LCD reading VOLTAGE CALIB Connect Instr connect DVM to output and terminals of power supply then press ENTER NOTE During calibration the gt increase decrease keys are used for fine adjust ments If necessary use the 1 decrease and 3 increase keys for coarse adjust ment then use the gt or keys 2 With LCD reading Vout ZERO adj monitor DVM and use gt or keys to increase or decrease output voltage as necessary to get DVM reading as close to zero as possible with out going to negative value If unable to reach zero adjust ZERO control as necessary Press ENTER when complete NOTE If LCD reads CAN T ADJUST FULL SCALE refer to Section 6 for troubleshooting 3 LCD will flash Vout F S adj WAIT then Vout F S adj lt gt Monitor DVM use gt keys to increase or decrease output voltage as necessary to get DVM read
136. s LCD contrast value to 0 9 DISP CONT Returns 0 9 DISP MODE NORM Changes LCD to Normal metering mode DISP MODE Returns NORMAL DISP MODE TEXT Changes LCD to Text mode DISP TEXT ATE IS IN USE Second line of display reads ATE IS IN USE DISP MODE Returns TEXT DISP TEXT Returns ATE IS IN USE FIGURE B 3 USING DISPLAY COMMANDS B 15 DISPlay CONTrast QUERY DISP CONT Syntax Short Form DISP CONT Long Form DISPlay CONTrast Return Value Numerical value from 0 to 1 indicating contrast setting Description Identifies LCD contrast setting Returns 0 if LCD is at minimum setting 1 if at maximum setting and returns values between 0 2 through 0 8 for other contrast settings Related Commands DISP CONT See example Figure B 3 16 DISPlay MODE COMMAND DISP MODE Syntax Short Form DISP MODE NORM or DISP MODE TEXT Long Form DISPlay MODE NORMal or DISPlay MODE TEXT Description Switches the LCD display between Normal and Text mode Switches the display between its nor mal metering mode and a mode in which it displays text sent by the user on the second line The default status at power up or after RST is NORMal In order to display text on the second line the dis play mode has to be changed to TEXT Related Commands DISP MODE DISP TEXT DISP TEXT RST See example Figure B 3 17 DISPlay MODE QUERY DISP MODE Syntax Short Form DISP MODE Long Form DISPlay MODE Return Value N
137. sage 224 is posted to the queue Related Commands CAL PASS CAL VOLT CAL CURR CAL ZERO CAL SAVE See example Figure B 2 8 CALibrate STATus QUERY CAL STAT Syntax Description Short Form CAL STAT Long Form CALibrate STATus Return Value boolean boolean 0 or OFF 1 or ON Identifies whether the power supply is in Calibrate status 1 indicates power supply is in Calibrate status 0 indicates power supply is not in Calibrate status See example Figure B 2 B 9 CALibrate VOLTage LEVel COMMAND CAL VOLT LEV Syntax Description Short Form CAL VOLT LEV MIN MAX Long Form CALibrate VOLTage LEVel MIN MAX Selects Voltage calibration only effective with power supply in Calibrate status CAL VOLT LEV MIN selects Voltage Zero Calibration CAL VOLT LEV MAX selects Voltage Full Scale Calibration Normally Voltage Zero is done first then Voltage Full Scale Calibration CAL VOLT MAX causes the maximum value to be read and saved in calibration xx The power supply then raises the output level to maximum and waits for CAL VOLT DATA commands Related Commands CAL STAT CAL PASS CAL VOLT CAL CURR CAL ZERO CAL SAVE See example Figure B 2 ATE DMG 020613 10 CALibrate VOLTage DATA COMMAND CAL VOLT Syntax Description Short Form CAL VOLT DATA 0111213 Long Form CALibrate VOLTage DATA 0 1 2 3 Increases or decreases output voltage during calibration only CAL VOLT DATA 0 de
138. shed by means of a suitable capacitor connected from either side of the power supply output to the signal ground The size of the capacitor should be carefully selected A value between 0 1 and 1 microfarad has been found to be successful in many cases POWER SUPPLY LOAD INTERFACE The general function of a voltage or current stabilized power supply is to deliver the rated output quantities to the connected load The load may have any conceivable characteristic It may be fixed or variable it may have predominantly resistive capacitive or inductive parameters it may be located very close to the power supply or it may be a considerable distance away The power supply designer cannot anticipate every conceivable application location or nature of the load The product must be designed for the widest possible application range and performance spec ifications at the output terminals of the power supply The aim of the following paragraphs is to aid the user in the final use of the product The interface of the power supply and the load The perfect interface between a power source and its load would mean that the specified perfor mance at the output terminals would be transferred without impairment to any load regardless of its characteristics distance from the power supply or environment To approach this ideal the power supply must satisfy certain requirements interconnecting rules must be closely followed and Ohm s Law as well as basic a c theo
139. single isolated loads the d c ground point may be located directly at one of the output terminals of the power supply which may be connected to ground If error sensing is employed d c ground can be established at the remote load In case of an internally grounded load the d c ground is auto matically established directly at the load ATE Power Supplies have one side of the output returned to the case over a resistor capacitor combination refer to Section 2 PAR 2 6 1 In those cases therefore where the load is inter nally grounded or where the signal ground must be established elsewhere the resistor capaci tor combination must be removed from the power supply case in order to avoid ground loop problems If there is a choice in selecting either the positive or the negative output of the power supply for the d c ground point both sides should be tried and preference given to the ground point producing the least noise Output ripple specifications as measured at the output are ATE DMG 020613 3 1 3 1 3 1 OUTPUT IMPEDANCE Zo however equally valid for either output side grounded Care should be taken in measuring the ripple and noise at the power supply output or at the load Measuring devices which are a c line operated often introduce ripple and noise into the circuit In the case where the load must be kept completely off ground d c isolated or it must be oper ated above ground potential grounding can be accompli
140. ster and ignores the extra characters See example Figure B 1 42 OUTPut STATe COMMAND OUTP Syntax Short Form OUTP STAT boolean Long Form OUTPut STATe boolean lt boolean gt 0 or OFF 1 or ON Description Enables or disables the power supply output Upon power up the output is enabled OUTP ON When OUTP OFF is executed the programmed values of voltage and current are saved then voltage and current are programmed to 0 When OUTP ON is executed the power supply output is restored to the previously saved programmed values The saved values of voltage and current can be viewed by VOLT and CURR queries Related Commands OUTP See example Figure B 1 43 OUTPut STATe QUERY OUTP Syntax Short Form OUTP STAT Long Form OUTPut STATe Return Value int value 0 or 1 Description Indicates whether power supply output is enabled or disabled Returns O if output disabled returns 1 if output enabled Related Commands OUTP See example Figure B 1 44 OUTPut PROTection DELay COMMAND OUTP PROT DEL Syntax Short Form OUTP PROT DEL n n Long Form OUTPut PROTection DELay n n where n n seconds Description Delays tripping of overvoltage overcurrent protection The overvoltage and overcurrent protection can be programmed to trip immediately upon detection of an overvoltage overcurrent condition or can be delayed approximately 8 seconds This delay is set in increments of 0 033 milliseco
141. stopped Related commands PROG STAT ATE DMG 020613 B 11 B 48 READ SCALar CURRent DC QUERY READ CURR Syntax Short Form READ SCAL CURR DC Long Form READ SCALar CURRent DC Return Value lt num_value gt digits with decimal point and Exponent Description Measures actual current Same as MEAS CURR see PAR B 40 B 49 READ VOLTage SCALar DC QUERY READ VOLT Syntax Short Form READ SCAL VOLT DC Long Form READ SCALar VOLTage DC Description Measures actual voltage Same as MEAS VOLT see PAR B 41 B 50 SOURce CURRent LEVel IMMediate AMPlitude COMMAND CURR Syntax Short Form SOUR JCURR LEV IMM AMP exp value Long Form SOURce CURRent LEVel IMMediate AMPlitude exp value exp value digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Sets programmed current level at power supply output This command programs output current to a specific value actual output current will depend on load conditions If the value exceeds the maxi mum for the model being programmed error message 222 Data out of range is posted in output queue If value programmed exceeds the CURR LIM HIGH value a value corresponding to the cur rent limit will be programmed Related Commands RCL SAV CURR LIM HIGH See example Fig ure B 1 51 SOURce CURRent LEVel IMMediate AMPlitude QUERY CURR Syntax Short Form SOUR CURR LEVT IMM AMP MIN MAX
142. t which the crowbar INDICATOR lamp energizes Correct LEVEL adjustment as described above if necessary Use VSET to reduce power supply output voltage to its operating value NOTE 1 Readjustment of the LEVEL control may be required after load and power supply have reached thermal equilibrium NOTE 2 If an exact crowbar point at a remote load must be established remote error sensing as described in PAR 3 2 3 must be used LOCAL MODE OPERATION KEYPAD OPERATION The following paragraphs explaining local mode operation include a description of the interac tion between the LCD and the front panel keypad see PAR 3 6 for remote mode programming Each key of the front panel is described with a reference to a paragraph detailing the use of that key Local operation of the ATE DMG Power Supply is accomplished via the 24 key keypad on the front panel All indications are provided by the 2 line LCD ATE DMG 020613 3 7 3 4 1 3 4 1 1 3 4 1 2 3 4 1 3 3 4 1 4 3 8 FRONT PANEL KEYPAD AND LCD SEE FIGURE 2 1 The front panel keypad is comprised of 24 key 13 dedicated to command functions 5 dedicated to data functions and 6 keys that have both command and data functions When the power sup ply is in command entry status the command functions are effective the power supply is in data entry status the data functions are effective COMMAND ENTRY STATUS Indicated by blinking colon on bottom line of LCD the power supply
143. tant Volt age CV mode 0 000V 0 000A output disabled command entry status see Figure 2 5 Overcurrent and Overvoltage protection are set to the maximum values see associated instruction manual but are not displayed 4 0 000V 0 000A NOTE indicates blinking colon Command Entry status indicates blinking equal sign Data Entry status FIGURE 2 5 LCD POWER ON DEFAULTS NOTE Six keys with dual functions are labeled with both a command and a number The com mand label is referred to when the unit is in command entry status the number is referred to when the unit is in data entry status 4 Press OUTPUT ON OFF key to enable the output 5 Connect a digital voltmeter DVM to the and terminals at the rear panel and verify DVM reads OV 6 Press VSET key Verify bottom line of LCD reads Vset nn where nn voltage setting ATE DMG 020613 2 6 2 6 1 2 6 1 1 2 6 1 2 2 7 7 Use number keys to enter rated maximum voltage e g for ATE 25 40DMG 25V is the rated maximum voltage and press ENTER Output voltage will be displayed at bottom left of LCD 8 Use and keys as necessary to adjust output precisely to rated maximum voltage Ver ify DVM voltage reading agrees with displayed voltage on LCD within 0 01 of rated maxi mum see associated instruction manual If the LCD reads VsetMAX value you are entering a value higher than the maximum voltage setting see PAR
144. tatus Byte Register without clearing it This Query reads the Status Byte Register bit 6 MSS without clearing it 1 set function enabled 0 reset function disabled The register is cleared only when subsequent action clears all set bits MSS is set when the power supply has one ore more reasons for requesting service A serial poll also reads the Status Byte Register except that bit 6 RQS not MSS and RQS will be reset Related Commands SRE SRE See example Fig ure A 1 16 TRG TRIGGER COMMAND TRG Syntax TRG Description Triggers the power supply to be commanded to preprogrammed values of output current and voltage When the trigger is armed checked by examining WTG bit in Status Operational Condition register TRG generates a trigger signal The trigger will change the output of the power supply to the output voltage and current levels specified by VOLT TRIG and CURR TRIG commands and clear the WTG bit in the Status Operation Condition register If INIT CONT has been issued the trigger subsystem is immediately rearmed for subsequent triggers and the WTG bit is again set to 1 TRG or GET are both addressed commands only devices selected as listeners will exe cute the command Related Commands ABOR INIT TRIG CURR TRIG VOLT TRIG See example Figure A 1 17 TST SELF TEST QUERY TST Syntax TST Returned value 0 or 1 0 pass test 1 fail test Description Power Supply test This query
145. ten 2 3 2 3 Internal Controls and Their enne 2 4 2 4 Input Output Pin Assignments for Remote Control enm nennen 2 5 3 1 Key Functions ee Le eda igi Le aceite dme Pu na 3 9 3 2 Memory Location Worksheet 2 3 16 3 3 Sample Program Model ATE 25 400 6 3 17 3 4 Connector A11J5 Pin Functions A dec dein 3 18 3 5 IEEE 488 GPIB Bus Interface 3 20 3 6 IEEE 488 GPIB Bus Command Mode 3 20 3 7 IEEE 488 GPIB Bus Data Mode 3 21 3 8 Rules Governing Shortform Keywords 4 1 Suggested Sense Resistors 4 2 Factory Default Calibration Passwords A 1 IEEE 488 2 Command query Index 2 2 Standard Event Status Enable Register and Standard Event Status Register Bits A 1 A 3 Service Request Enable and Status Byte Register Bits A 5 B 1 SCPI Subsystem Command query Index B 1 B 2 Operation Condition Register Operation Enable Register and Operation Event Register B 17 B 3 Questionable Event Register Questionable Condition Register and Questionable Condition Enable Register Bits sese eme B 19 B 4 ig
146. ter parameters specified by memory location 21 have been applied for 0 6 second power supply will switch to parameters specified by memory location 21 sequence number LIST SEQ NEXT 39 Sets memory location sequence number to 39 During program execution when memory location 21 is complete the next location to be executed will be 39 LIST SEQ NEXT Returns 39 LIST IND 22 Selects memory location 22 LIST IND Returns 22 LIST VOLT 1 256E 2 Sets output voltage value of memory location 22 to 125 6V LIST VOLT Returns 1 256E 2 LIST SEQ STAR 21 Sets memory location 21 as the starting location for executing a program LIST SEQ STAR Returns 21 FIGURE B 4 USING LIST COMMANDS AND QUERIES B 27 SOUR LIST CURRent PROTect QUERY LIST CURR PROT Syntax Short Form LIST CURR LEV Long Form LIST CURRent LEVel Return Value lt exp_value gt digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Returns current protection value Amps stored in indexed memory location selected by LIST IND Related Commands LIST IND LIST IND LIST CURR See example Figure B 4 28 SOUR LIST DWELI COMMAND LIST DWEL Syntax Short Form LIST DWEL lt value gt 0 01 to 300 Long Form LIST DWELI value 0 01 to 300 Description Determines the execution time duration during a programmed sequence for the memory loca tion selected by LIST IND Sets time value from 0 01 to 300 in seconds for memory location
147. th a flexible a c power cord are equipped with a 3 prong safety plug which must be connected to a grounded a c power outlet D C OUTPUT GROUNDING Connections between the power supply and the load load and sensing connections as well as connections to the power supply amplifiers programming connections may despite all precau tions such as shielding twisting of wire pairs etc pickup radiated noise of a wide frequency spectrum To minimize these undesired effects one side of the power supply output load circuit should be grounded Successful d c grounding depends on careful analysis of the individual situation and only gen eral guide lines can be provided here One of the major points however is to avoid GROUND LOOPS Ground loops are created when two or more points are grounded along the output cir cuit Due to the wire impedance between the separated grounded points a noise voltage is developed which subsequently is superimposed on the load The only way to avoid ground loops is to investigate the output circuit including the connected load carefully by means of an ohmmeter for any resistance to ground A single d c ground point can be selected only if the output circuit is completely isolated A single point is selected along the power supply out put load circuit and this point is returned to ground with a single wire The exact location of this best d c ground point is entirely dependent on the application at hand For
148. tion of source power to the product see instructions on instal lation herein in order to ensure safety from electric shock PROTECTIVE EARTHING CONDUCTOR TERMINAL This symbol indicates the point on the product to which the protective earthing conductor must be attached EARTH GROUND TERMINAL This symbol is used to indicate a point which is connected to the PROTECTIVE EARTHING TERMINAL The component installer assembler must ensure that this point is connected to the PROTECTIVE EARTH ING TERMINAL CHASSIS TERMINAL This symbol indicates frame chassis connection which is supplied as a point of convenience for performance purposes see instructions on grounding herein This is not to be confused with the protective earthing point and may not be used in place of it 3 Electric Shock Hazards This product outputs hazardous voltage and energy levels as a function of normal operation Operators must be trained in its use and exercise caution as well as common sense during use to prevent accidental shock This symbol appears adjacent to any external terminals at which hazardous voltage levels as high as 500V d c may exist in the course of normal or single fault condi tions This symbol appears adjacent to any external terminals at which hazardous voltage levels in excess of 500V d c may exist in the course of normal or single fault condi tions gt gt 228 1352 SAFETY COVER REMOVAL 020613 C D BLANK TABL
149. tionable CONDition sse entere B 19 STATus QUEStionable ENABle Command ener B 19 STATus QUEStionable ENABle Query 1 eene nter nnne B 19 SYSTem ERRor NEXT sss B 19 SYSTem ERRor CODE Query cede eiecti ded eder tee a eee Des B 20 SYSTem ERRor CODE ALL 20 SYSTem KLOCKk Command B 20 5 1 000220004000400660000000000 00 B 20 SY S Tem LANGUAGE B 20 SYSTem LANGuage Command nennen enne nnn B 20 SYSTem PASSword CENable sss B 22 SYSTem PASSword CDlSable sss B 22 SYSTem PASSword STATe Query nnne nnne B 22 SYSTem SECurity IMMediate Command sss ene B 22 SYS Tem SET Gomtmiahd itle tet ge ee HE ee ode de B 23 SYSTem VERSion Q ery ce cete ete ee tiet red ette de C p Une He dette e RH Ree e EORR B 23 FIGURE vi 1 1 1 2 2 1 2 2 2 3 2 4 2 5 2 6 3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 3 10 1 1 2 3 4 5 6 7 8 LIST OF FIGURES TITLE PAGE ATE DMG Series Programmable Power ix Mechanical Outline 1 7 ATE
150. trols and signal lines as speci fied within the product operating instructions There are no user or operator serviceable parts within the product enclosure Refer all servicing to qualified and trained Kepco service technicians 228 1351 COND CONFORM 020613 SAFETY INSTRUCTIONS 1 Installation Operation and Service Precautions This product is designed for use in accordance with EN 61010 1 and UL 3101 for Installation Category 2 Pollution Degree 2 Hazardous voltages are present within this product during normal operation The prod uct should never be operated with the cover removed unless equivalent protection of the operator from accidental contact with hazardous internal voltages is provided There are no operator serviceable parts or adjustments within the product enclosure Refer all servicing to trained service technician Source power must be removed from the product prior to performing any servicing This product is factory wired for the nominal a c mains voltage indicated on the rat ing nameplate located adjacent to the source power connection on the product s rear panel To reconfigure the product input for other nominal mains voltages as listed herein the product must be modified by a trained service technician gt gt gt 2 Grounding This product is a Class 1 device which utilizes protective earthing to ensure operator safety The PROTECTIVE EARTHING CONDUCTOR TERMINAL must be properly con nected prior to applica
151. tructions Section 4 CALIB appear LCD 9 Data Entry Press to enter number 9 3 4 1 2 Press to store present values of output voltage and current and overvoltage 3 4 12 STORE Command Entry and overcurrent protection Data entry required to select memory location where values are to be stored Press to select the starting memory location to be edited Then use or EDIT PROG Command Entry to view or modify the parameters of a specific memory location or to cre ate a new program Command Entry Press to select starting address of program to be executed one step ata 3 4 15 3 STEP time 4 Data Entry Press to enter number 4 3 4 1 2 ATE DMG 020613 3 9 TABLE 3 1 KEY FUNCTIONS CONTINUED POWER SUPPLY REFERENCE SEX STATUS ACTIVE DESPISIETION PARAGRAPH Command Ent Press to edit time value for specific memory location Select memory loca TIME tion data entry then enter time value 0 01 to 2 5 seconds data entry 5 Data Entry Press to enter number 5 3 4 1 2 Press to run a program Requires data entry to select starting location 3 4 15 2 RUN Command Entry Press ENTER to accept displayed value 6 Data Entry Press to enter number 6 3 4 1 2 Press to recall previously stored values of output voltage and current and 3 4 13 overvoltage and overcurrent protection Data entry required to select mem RECALL Command Entry ory location containing values to
152. ts are combined in a program message they must be separated by a semicolon e g VOLT 15 MEAS VOLT and CURR 12 CURR TRIG 12 5 ROOT SPECIFIER The root specifier is a colon that precedes the first keyword of a program message This places the parser at the root top left Figure 3 8 of the command tree Note the difference between using the colon as a keyword separator and a root specifier in the following examples VOLT LEV IMM 16 Both colons are keyword separators CURR LEV IMM 4 The first colon is the root specifier the other two are keyword separators VOLT LEV 6 CURR LEV 15 The second colon is the root specifier the first and third are key word separators ON TRIG MEAS CURR VOLT first three colons are root specifiers ATE DMG 020613 3 27 3 7 4 8 3 7 5 3 28 MESSAGE TERMINATOR The message terminator defines the end of a message One message terminator is permitted new line NL ASCII 10 decimal or hex NOTE Kepco power supplies require a message terminator at the end of each program mes sage The examples shown in this manual assume a message terminator will be added at the end of each message Where a message terminator is shown it is represented as NL regardless of the actual terminator character UNDERSTANDING THE COMMAND STRUCTURE Understanding the command structure requires an understanding of the subsystem command tree illustrated in Figure 3 8 The root is
153. ude Non operating 3 axes 1 hour each axis Cooling Forced air High efficiency single bearing fans permanently lubri cated with special low noise non metallic blades Exhaust to rear PHYSICAL CHARACTERISTICS Weight 96 Ibs 43 6Kg Packed for Shipment Dimensions inches 6 31 32 x 19 x 20 1 64 See Figure 1 2 mm 177 x 482 6 x 506 8 a c source connec Terminal block tions d c output connec Rear panel Binding post lo lt 3 0 tions Rear panel compression studs lo 2 3 0A User port 50 terminal connector Indicators Three LED s Voltage Current OVP Remote control One standard Rear programming GPIB connector SCPI amp IEEE 488 2 Commands Digital display Voltage current mode status 2 x 16 character alphanumeric LCD with LED backlight front panel menu program etc Mounting in Std 19 in racks Mounting ears supplied Finish Fed Std 595 Dark and light gray Color 26440 ATE DMG OPER 020613 1 3 TABLE 1 3 ATE DYNAMIC SPECIFICATIONS RESISTIVE LOAD OUTPUT PROGRAMMING BANDWIDTH PROGRAMMING TIME CONSTANT VOLTAGE RATING T age ne Typical minimum Typical maximum 6V 23 0 16 0 7 0 10 0 15V 20 0 10 6 8 0 15 0 25V 11 5 8 0 14 0 10 0 36V 8 0 6 4 20 0 20 0 55V 4 8 4 0 33 0 25 0 75V 4 3 3 5 37 0 40 0 100V 2 7 2 5 60 0 45 0 150V 1 8 1 7 88 0 95 0 325V 1 5 0 937 110 0 170 0 NOTES nel is shown above
154. um and values established analog to digital conversion values read calculations performed Voltage and current output set to zero User connects shunt and connects DVM to it Current Zero Calibration selected Output current increased Current Full Scale Calibration selected current zero values stored in volatile memory ATE DMG 020613 CAL CURR 0 Output current decreased CAL SAVE Calibration values saved current maximum values calculated based on power supply settings an measurements The non volatile current calibration constants are moved to area of non volatile memory reserved for previous calibration data New volatile constants are stored in memory CAL STAT 0 Power supply exits Calibrate mode CAL STAT Returns 0 indicating power supply not in Calibrate status FIGURE B 2 USING CALIBRATION COMMANDS AND QUERIES B 3 85 CALibrate PASSword COMMAND CAL PASS Syntax Description Short Form CAL PASS new password new password is 4 digits Long Form CALibrate PASSword new password new password is 4 digits Changes the password used to put the power supply in Calibrate status To execute this com mand the power supply must be in Calibrate status see CAL STAT password 4 digits required to enter Calibrate status Related Commands CAL PASS CAL VOLT CAL CURR CAL ZERO CAL SAVE See example Figure B 2 B 6 CALibrate SAVE COMMAND CAL SAVE Syntax Description Short Form CAL SAVE Long Form
155. um capacity of 25V 40A can be limited to 5 5V 20A for working with circuitry that might be damaged by higher levels Once the limits are set the power supply becomes in effect a 5 5V 20A supply and values exceeding the limit values will not be accepted Refer to PAR 3 4 11 EQUIPMENT SUPPLIED The unit is shipped with a standard Power Cord 115 VAC USA standard configuration plug ACCESSORIES Accessories for the ATE DMG Power Supply are listed in Table 1 6 TABLE 1 6 ACCESSORIES ITEM FUNCTION PART NUMBER IEEE 488 Cable 1 meter long Connects ATE DMG power supply to GPIB bus 118 0916 IEEE 488 Cable 2 meter long Connects ATE DMG power supply to GPIB bus 118 0917 IEEE 488 Cable 4 meter longs Connects ATE DMG power supply to GPIB bus 118 0918 SAFETY There are no operator serviceable parts inside the case Service must be referred to authorized personnel Using the power supply in a manner not specified by Kepco Inc may impair the pro tection provided by the power supply Observe all safety precautions noted throughout this man ual Table 1 7 lists symbols used on the power supply or in this manual where applicable ATE DMG OPER 020613 TABLE 1 7 SAFETY SYMBOLS SYMBOL MEANING CAUTION RISK OF ELECTRIC SHOCK CAUTION REFER TO REFERENCED PROCEDURE WARNING INDICATES THE POSSIBILITY OF BODILY INJURY OR DEATH CAUTION INDICATES THE POSSIBILITY OF EQUIPMENT DAMAGE
156. upply output exceeds the voltage protection level programmed then the power supply output is disabled programmed to 0 and the OV bit in the Questionable Condition status reg ister is set An overvoltage condition can be cleared with the VOLT PROT CLE command The voltage protection level can be programmed independently of the output voltage level Setting voltage protec tion to a value lower than the output voltage causes the voltage protection mechanism to trigger imme diately See example Figure B 6 NOTES 1 Power supply assumed to be operating in constant voltage mode 2 Examples below are intended only to illustrate command functions Refer to PAR 3 6 5 for programming techniques to optimize performance VOLT 21 CURR 1 1 Power supply programmed to 21V 1 1A VOLT 2 157E1 Power supply programmed to go to 21 57V VOLT Returns 2 157E1 indicating programmed voltage 2 157V VOLT MAX For ATE 100 10DM returns 100 100V VOLT MIN Returns 0 minimum allowable voltage VOLT PROT 2 365E 1 Voltage protection set to 23 65V VOLT Returns 21 57 indicating programmed voltage value 21 57V VOLT PROT Returns 2 365 E1 programmed overvoltage protection 23 65V VOLT PROT MAX For ATE 100 10DMG returns 110 VOLT PROT TRIP 0 indicating overvoltage protection not tripped OVERVOLTAGE CONDITION OCCURS VOLT PROT TRIP 1 indicating overvoltage protection tripped VOLT PROT CLE Overvoltage condition cleared VOLT PROT TRIP 0 indic
157. ve false See example Figure B 7 B 78 STATus OPERation EVENt QUERY STAT OPER Syntax Short Form STAT OPER EVEN Long Form STATus OPERation EVENt Return Value lt int_value gt 0 to 1313 1 32 256 1024 Description Indicates changes in conditions monitored by Operational Event Register Returns the value of the Operation Event register The Operation Event register is a read only register which holds latches all events that occur Reading the Operation Event register clears it See example Figure B 7 B 79 STATus PRESet COMMAND STAT PRES Syntax Short Form STAT PRES Long Form STATus PRESet Description Disables reporting of all status events This command sets all bits of the Operation Condition Table B 2 and Questionable Condition Registers to 0 preventing all status events from being reported See example Figure B 7 NOTE The power supply is assumed to be operating in cV constant voltage mode STAT OPER ENAB 1056Mask enabled for CC WTG and bits STAT OPER ENAB Returns 1056 32 1024 CC WTG bits set STAT QUES ENAB 3 Mask enabled for OV and OC bits 1 2 STAT QUES ENAB Returns 3 1 2 indicating OV and OC bits are enabled STAT PRES Operation Condition and Questionable Condition registers are reset Continuous triggers enabled STAT OPER COND Power supply returns 288 256 32 to indicate that power supply is constant voltage mode and Wait For Trigger is

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OPERATOR MANUAL KEPCO®