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Contains Servicing Information

Model 2303/2303B/2303-PJ

High Speed Power Supply

深圳德标仪器

135-1095-0799

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Содержание 2303

Страница 1: ...Contains Servicing Information Model 2303 2303B 2303 PJ HighSpeedPowerSupply Service Manual 135 1095 0799...

Страница 2: ...ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS INSTRUMENTS AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS INC HAS BEEN ADVIS...

Страница 3: ...2303 2303B 2303 PJ High Speed Power Supply Service Manual 1998 Keithley Instruments Inc All rights reserved Cleveland Ohio U S A Third Printing November 1999 Document Number 2303 902 01 Rev C 135 1095...

Страница 4: ...ered sequentially When a new Revision is created all Addenda associated with the previous Revision of the manual are incorporated into the new Revision of the manual Each new Revision includes a revis...

Страница 5: ...s Institute ANSI states that a shock haz ard exists when voltage levels greater than 30V RMS 42 4V peak or 60VDC are present A good safety practice is to expect that hazardous voltage is present in an...

Страница 6: ...manual explains dangers that might result in personal injury or death Always read the associated information very carefully before performing the indicated procedure The CAUTION heading in a manual ex...

Страница 7: ...dels 2303 and 2303B 5mA range readback accuracy 1 10 Model 2303 PJ 500mA range readback accuracy 1 11 Digital voltmeter input accuracy 1 13 2 Calibration Introduction 2 2 Environmental conditions 2 2...

Страница 8: ...board removal 3 4 Front panel disassembly 3 4 Removing mechanical components 3 5 Instrument re assembly 3 5 4 Replaceable Parts Introduction 4 2 Ordering information 4 2 Factory service 4 2 Parts lis...

Страница 9: ...2 General program instructions C 3 Program C 1 Model 2303 2303B calibration program C 4 Program C 2 Model 2303 PJ calibration program C 6 D Instrument Control Introduction D 2 Front panel control D 2...

Страница 10: ...ions for Model 2303 and 2303B 5mA current verification tests 1 10 Connections for Model 2303 PJ 500mA current verification tests 1 12 Connections for DVM accuracy verification 1 13 2 Calibration Test...

Страница 11: ...l 2303 PJ front panel calibration summary 2 13 Remote calibration command summary 2 14 Models 2303 and 2303B remote calibration summary 2 17 Model 2303 PJ remote calibration summary 2 20 4 Replaceable...

Страница 12: ...1 Performance Verification 135 1095 0799...

Страница 13: ...the correct course of action Verification test requirements Be sure that you perform the verification tests Under the proper environmental conditions After the specified warm up period Using the corre...

Страница 14: ...20 range of DMM before use 3 Used only for Model 2303 PJ Characterize resistor using 4 wire ohms function and 200 range of DMM before use See Resistor considerations for temperature coefficient 4 Use...

Страница 15: ...3 output voltage and R is the change in resistance caused by heating Verification limits The verification limits stated in this section have been calculated using only the Model 2303 accuracy specific...

Страница 16: ...est equipment to the Model 2303 through a scanner multiplexer or other switching equipment Be sure that the power supply output is turned on before making measurements Allow the power supply output si...

Страница 17: ...DISPLAY 2001 MULTIMETER DCV ACV DCI ACI 2 4 FREQ TEMP REL TRIG INFO LOCAL EXIT ENTER RANGE RANGE F R 500V PEAK FRONT REAR 2A 250V AMPS CAL STORE RECALL CHAN SCAN FILTER MATH CONFIGMENU HI INPUT LO SE...

Страница 18: ...Note that it may not be possible to set the voltage source precisely to the specified value Use the closest possible setting and modify reading limits accord ingly When setting the voltage set the co...

Страница 19: ...V ACV DCI ACI 2 4 FREQ TEMP REL TRIG INFO LOCAL EXIT ENTER RANGE RANGE F R 500V PEAK FRONT REAR 2A 250V AMPS CAL STORE RECALL CHAN SCAN FILTER MATH CONFIGMENU HI INPUT LO SENSE 4 WIRE INPUTS 350V PEAK...

Страница 20: ...current readings are displayed 4 Turn on the Model 2303 output 5 Verify 5A range current readback accuracy for the currents listed in Table 1 5 For each test point By changing the output voltage adju...

Страница 21: ...98 to 4 9102A NEXT PREV POWER DISPLAY 2001 MULTIMETER DCV ACV DCI ACI 2 4 FREQ TEMP REL TRIG INFO LOCAL EXIT ENTER RANGE RANGE F R 500V PEAK FRONT REAR 2A 250V AMPS CAL STORE RECALL CHAN SCAN FILTER M...

Страница 22: ...al Model 2303 current reading is within the limits given in the table Table 1 6 Model 2303 and 2303B 5mA range current readback accuracy limits As determined from digital multimeter voltage reading an...

Страница 23: ...le NEXT PREV POWER DISPLAY 2001 MULTIMETER DCV ACV DCI ACI 2 4 FREQ TEMP REL TRIG INFO LOCAL EXIT ENTER RANGE RANGE F R 500V PEAK FRONT REAR 2A 250V AMPS CAL STORE RECALL CHAN SCAN FILTER MATH CONFIGM...

Страница 24: ...99 56 to 200 44mA 9V 300 00mA 299 36 to 300 64mA 12V 400 00mA 399 16 to 400 84mA 14 7V 490 00mA 488 98 to 491 02mA NEXT PREV POWER DISPLAY 2001 MULTIMETER DCV ACV DCI ACI 2 4 FREQ TEMP REL TRIG INFO L...

Страница 25: ...oint Set the voltage to the indicated value as measured by the digital multimeter Set compliance to 3A Allow the reading to settle Verify that the Model 2303 voltage reading is within the limits given...

Страница 26: ...2 Calibration 135 1095 0799...

Страница 27: ...del 2303 to warm up for at least one hour before performing calibration If the instrument has been subjected to temperature extremes those outside the ranges stated above allow additional time for the...

Страница 28: ...rmation 1 Full range 90 day 23 C 5 C accuracy specifications of ranges required for various measurement points 2 Characterize resistor using 4 wire ohms function and 20 range of DMM before use 3 Requi...

Страница 29: ...t readings as follows VOUT R 25 of Model 2303 amps specification VOUT is the Model 2303 output voltage and R is the change in resistance caused by heating Front panel calibration Model 2303 and Model...

Страница 30: ...ibration code CALIBRATE UNIT Cal Code KI002303 6 Using the edit keys set the display to the current calibration code then press ENTER Default KI002303 The unit will then prompt you as to whether or no...

Страница 31: ...VOLTS READ2 14 0000 V NEXT PREV POWER DISPLAY 2001 MULTIMETER DCV ACV DCI ACI 2 4 FREQ TEMP REL TRIG INFO LOCAL EXIT ENTER RANGE RANGE F R 500V PEAK FRONT REAR 2A 250V AMPS CAL STORE RECALL CHAN SCAN...

Страница 32: ...urrent from that reading and the actual 4 resistance value I V R Adjust the Model 2303 current display value to agree with the calculated current value and press ENTER NEXT PREV POWER DISPLAY 2001 MUL...

Страница 33: ...POWER DISPLAY 2001 MULTIMETER DCV ACV DCI ACI 2 4 FREQ TEMP REL TRIG INFO LOCAL EXIT ENTER RANGE RANGE F R 500V PEAK FRONT REAR 2A 250V AMPS CAL STORE RECALL CHAN SCAN FILTER MATH CONFIG MENU HI INPUT...

Страница 34: ...s ENTER In that case the unit will revert to prior calibration constants 3 The unit will then prompt you to enter the calibration date CALIBRATE UNIT Cal Date 02 01 98 4 Using the edit keys set the ca...

Страница 35: ...was calibrated CALIBRATE UNIT TIMES 01 4 Press the up arrow key The unit will then prompt you to run calibration CALIBRATE UNIT RUN 5 Press ENTER The unit will then prompt for the calibration code CA...

Страница 36: ...ull scale calibration 8 Connect the digital multimeter volts input and characterized 4 resistor to the Model 2303 PJ OUTPUT SOURCE terminals as shown in Figure 2 3 Be sure to observe proper polarity S...

Страница 37: ...V DCI ACI 2 4 FREQ TEMP REL TRIG INFO LOCAL EXIT ENTER RANGE RANGE F R 500V PEAK FRONT REAR 2A 250V AMPS CAL STORE RECALL CHAN SCAN FILTER MATH CONFIG MENU HI INPUT LO SENSE 4 WIRE INPUTS 350V PEAK 11...

Страница 38: ...ter the calibration date CALIBRATE UNIT Cal Date 02 01 98 4 Using the edit keys set the calibration date to today s date then press ENTER The unit will display the following CALIBRATE UNIT EXITING CAL...

Страница 39: ...ected by password CODE code Unlock cal changes code if cal is already unlocked Default code KI002303 COUNt Query number of times 2303 has been calibrated DATE yyyy mm dd Program calibration year month...

Страница 40: ...e test equipment and allow them to warm up for at least one hour before performing calibration 3 Make sure the IEEE 488 primary address of the Model 2303 is the same as the address specified in the pr...

Страница 41: ...CAL PROT STEP4 1 9 9 Note and record the DMM voltage reading then calculate the current from that reading and 4 resistor value Send the following command using that calculated current as the parameter...

Страница 42: ...ll revert to previous calibration constants After saving constants lock out calibration by sending CAL PROT LOCK Table 2 5 Models 2303 and 2303B remote calibration summary Step Command Description Tes...

Страница 43: ...ODE code For example with the factory default code of KI002303 send CAL PROT CODE KI002303 5 Send the following command to initiate calibration CAL PROT INIT Step 2 Perform calibration steps NOTE Allo...

Страница 44: ...ple with a current value of 1 894A the command would appear as follows CAL PROT STEP5 1 894 10 Note and record a new DMM voltage reading then again calculate the current from the voltage and resistanc...

Страница 45: ...will revert to previous calibration constants After saving constants lock out calibration by sending CAL PROT LOCK Table 2 6 Model 2303 PJ remote calibration summary Step Command Description Test conn...

Страница 46: ...the calibration code CALIBRATE UNIT Cal Code KI002303 5 Using the edit keys set the display to the current present calibration code then press ENTER Default KI002303 The unit will then prompt you as...

Страница 47: ...el Follow the steps below to view the Model 2303 or 2303 PJ calibration date and count from the front panel 1 Press the MENU key then choose CALIBRATE UNIT and press ENTER The instru ment will display...

Страница 48: ...3 Disassembly 135 1095 0799...

Страница 49: ...es and shields Do not touch any board traces or components not associated with repair Do not touch areas adjacent to electrical contacts Use dry nitrogen gas to clean dust off PC boards Solder repairs...

Страница 50: ...bly drawings located at the end of this section to assist you as you disassemble and re assemble the Model 2303 Also refer to these drawings for information about the Keithley part numbers of most mec...

Страница 51: ...log board assembly free of the main chassis Digital board removal Perform the following steps to remove the digital board This procedure assumes that the analog board assembly has already been removed...

Страница 52: ...To remove the line filter squeeze the latches on either side while pushing the line filter from the access hole on the rear panel Instrument re assembly Re assemble the instrument by reversing the pr...

Страница 53: ...3 6 Disassembly 135 1095 0799...

Страница 54: ...epair perform the following Call the Repair Department at 1 800 552 1115 for a Return Material Authorization RMA number Complete the service form at the back of this manual and include it with the ins...

Страница 55: ...0 100V CERAMIC C 451 470P C135 C266 CAP 2 2U 10 50V TANTALUM C 563 2 2 C136 157 165 189 193 282 204 121 103 CAP 1UF 20 50V CERAMIC C 418 1 C143 CAP 270PF 5 100V CERAMIC C 465 270P C158 CAP 01UF 20 50V...

Страница 56: ...P1007 CABLE ASSEMBLY 26 CONDUCTOR CA 27 6 P1008 CABLE ASSEMBLY WITH GROUND PLANE CA 152 2B P1009 CABLE ASSEMBLY CA 62 4B P1010 CABLE ASSEMBLY CA 171 1A PS100 POWER SUPPLY PS 64A Q100 102 104 106 111 1...

Страница 57: ...0K R171 R180 R192 R197 RES 100 1 100MW THICK FILM R 418 100 R175 RES 10 10 100MW THICK FILM R 418 10 R182 RES 1K 1 125MW METAL FILM R 391 1K R183 RES NET TF 245 R184 RES 1 28M 1 1 8W METAL FILM R 176...

Страница 58: ...K RT 8 RV100 METAL OXIDE VARISTOR VR 7 RV102 VARISTOR VR 14 S100 SWITCH PUSHBUTTON 6 POLE SW 466 TP100 109 111 112 CONNECTOR CS 985 U100 RS 232 LINE DRIVER RECEIVER IC 1129 U101 U128 IC VOLT COMPARATO...

Страница 59: ...ACE BUS 75160 IC 646 U132 IC DUAL BIPOLAR OP AMP LT1124CS8 IC 955 U134 PRECISION BIFET OPAMP IC 1194 U135 IC OP AMP NE5534D IC 802 U136 PROGRAMMED ROM 2000 802 U137 IC GPIB ADAPTER 9914A PLCC LSI 123...

Страница 60: ...CERAMIC C 451 1000P C356 C499 C500 CAP 100PF 5 100V CERAMIC C 465 100P C362 C509 CAP 220PF 10 100V CERAMIC C 451 220P C363 C480 C481 CAP 3300P 10 500V CERAMIC C 497 3300P C365 CAP 2200P 1 50V CERAMIC...

Страница 61: ...URRENT REGULATOR TG 341 Q304 TRANS N CHANNEL FET 2N4392 TG 128 1 Q305 Q306 Q307 Q308 TRANS N CHANNEL JFET SNJ132199 TG 294 Q310 Q311 TRANS N CHANNEL FET IRF530 TG 184 Q312 TRANS NPN MMBT3904 TG 238 Q3...

Страница 62: ...495 496 RES 475 1 100MW THICK FILM R 418 475 R363 R370 RES 8 98K 1 125W THIN FILM R 456 8 98K R364 R369 RES 1K 1 125W THIN FILM R 456 1K R373 R374 R387 R392 RES 20K 1 125MW METAL FILM R 391 20K R375...

Страница 63: ...05 U307 IC VOLTAGE REGULATOR LM340 12 IC 60 U306 U311 U322 U330 IC VOLT COMPARATOR LM393D IC 775 U310 MICROPOWER VOLTAGE REGULATOR IC 1152 U312 LOW POWER INSTRUMENT AMP IC 1124 U313 IC NEG VOLTAGE REG...

Страница 64: ...S 362 J1014 CONN BERG CS 339 L601 L602 L603 L604 FERRITE CHIP 600 OHM BLM32A07 CH 62 R601 RES 10M 5 125MW METAL FILM R 375 10M R602 605 611 614 616 618 620 623 625 RES 10K 1 100MW THICK FILM R 418 10K...

Страница 65: ...307C 1 FAN FN 34 1 2 FOOT 428 319A 2 FOOT EXTRUDED FE 22A 2 FOOT RUBBER FE 6 1 FUSE 2A 250V TIME LAG 5X20MM F100 FU 81 1 HANDLE 428 329F 1 IEEE CONNECTOR HARDWARE KIT CS 713 1 LINE CORD CO 7 1 LINE FI...

Страница 66: ...P 470P 10 100V CERAMIC C 451 470P C135 C266 CAP 2 2U 10 50V TANTALUM C 563 2 2 C136 157 165 189 193 282 204 121 103 CAP 1UF 20 50V CERAMIC C 418 1 C143 CAP 270PF 5 100V CERAMIC C 465 270P C158 CAP 01u...

Страница 67: ...H 62 L106 L107 L108 FERRITE CHIP 600 OHM BLM32A07 CH 62 P1007 CABLE ASSEMBLY 26 CONDUCTOR CA 27 6 P1008 CABLE ASSEMBLY WITH GROUND PLANE CA 152 2B P1009 CABLE ASSEMBLY CA 62 4B P1010 CABLE ASSEMBLY CA...

Страница 68: ...K FILM R 418 1M R166 RES 150K 1 100MW THICK FILM R 418 150K R171 R180 R192 R197 RES 100 1 100MW THICK FILM R 418 100 R175 RES 10 10 100MW THICK FILM R 418 10 R182 RES 1K 1 125MW METAL FILM R 391 1K R1...

Страница 69: ...D 7MW DEG C 1500V 613 74K RT 8 RV100 METAL OXIDE VARISTOR VR 7 RV102 VARISTOR VR 14 S100 SWITCH PUSHBUTTON 6 POLE SW 466 SO100 FOR U123 SOCKET PLCC 032 T A SO 143 32 TP100 109 111 112 CONNECTOR CS 985...

Страница 70: ...C 1131 U131 IC OCTAL INTERFACE BUS 75160 IC 646 U132 IC DUAL BIPOLAR OP AMP LT1124CS8 IC 955 U134 PRECISION BIFET OPAMP IC 1194 U135 IC OP AMP NE5534D IC 802 U136 PROGRAMMED ROM 2000 802 U137 IC GPIB...

Страница 71: ...AMIC C 451 1000P C356 C499 C500 CAP 100PF 5 100V CERAMIC C 465 100P C362 C509 CAP 220PF 10 100V CERAMIC C 451 220P C363 C480 C481 CAP 3300P 10 500V CERAMIC C 497 3300P C365 CAP 2200P 1 50V CERAMIC C 5...

Страница 72: ...Q308 TRANS N CHANNEL JFET SNJ132199 TG 294 Q310 Q311 TRANS N CHANNEL FET IRF530 TG 184 Q312 TRANS NPN MMBT3904 TG 238 Q313 315 314 332 HEXFET POWER MOSFET TG 354 Q323 326 RECTIFIER TG 337 Q327 TRANS...

Страница 73: ...R374 R387 R392 RES 20K 1 125MW METAL FILM R 391 20K R375 R377 RES 1K 5 1W 200V THICK FILM R 437 1K R376 RES 100 1 1 2W METAL FILM R 169 100 R383 R385 R386 R388 RES 49 9K 1 125MW METAL FILM R 391 2 87K...

Страница 74: ...EGULATOR IC 1152 U312 LOW POWER INSTRUMENT AMP IC 1124 U313 IC NEG VOLTAGE REG 15V 500MA 79M15 IC 195 U314 HIGH SPEED PWN CONTROLLER IC 1120 U315 IC 5V VOLTAGE REGULATOR LM2940CT IC 576 U317 DUAL 15V...

Страница 75: ...BEZEL REAR 428 303D 1 COVER 2000 307C 1 FAN FN 34 1 2 FOOT 428 319A 2 FOOT EXTRUDED FE 22A 2 FOOT RUBBER FE 6 1 FUSE 2A 250V TIME LAG 5X20MM F100 FU 81 1 HANDLE 428 329F 1 LINE CORD CO 7 1 LINE FILTE...

Страница 76: ...A Specifications 135 1095 0799...

Страница 77: ...ainties for the calibration sources used during Keithley s factory calibration are included in the specifications The uncertainties of the operator s sources may be different All AC specifications are...

Страница 78: ...he negative output lead due to load current change DC CURRENT 2 YEARS 23 C 5 C OUTPUT CURRENT 0 9V 5A max 9V 15V 3A max not intended to be operated in parallel SOURCE COMPLIANCE ACCURACY 0 16 5mA 5 PR...

Страница 79: ...60Hz auto detected at power up WARRANTY One year parts and labor on materials and workmanship EMC Conforms with European Union Directive directive 89 336 EEC EN 55011 EN 50082 1 EN 61000 3 2 and 61000...

Страница 80: ...ck accuracy is calculated similarly except of course that voltage or current readback specifications are used As an example of how to calculate the actual current readback limits assume the actual cur...

Страница 81: ...A 7 Specifications 135 1095 0799...

Страница 82: ...B CalibrationReference 135 1095 0799...

Страница 83: ...s protected by password CODE code Unlock cal changes code if cal is already unlocked Default code KI002303 COUNt Query number of times 2303 has been calibrated DATE yyyy mm dd Program calibration year...

Страница 84: ...s KI002303 Notes The CODE command should be sent only once before performing cali bration Do not send CODE before each calibration step To change the code first send the present code then send the new...

Страница 85: ...ommand should be sent only once at the beginning of the calibra tion procedure Do not send INIT before each calibration step Example CAL PROT INIT Initiate calibration SAVE CALibration PROTected SAVE...

Страница 86: ...full scale output Table B 2 Calibration step summary Command Description CALibration Calibration subsystem PROTected Cal commands protected by password STEP0 nrf Output full scale voltage 14V STEP1 nr...

Страница 87: ...the STB query to obtain the status byte then test bit 2 to see if it is set If the EAV bit is set an error has occurred and you can use the appropriate error query to read the error and at the same t...

Страница 88: ...owing each calibration command For example CAL PROT STEP0 14 OPC Note that you must include the semicolon to separate the two commands and that the OPC command must appear on the same line as the comm...

Страница 89: ...use this method send both ESE 1 and SRE 32 to the instrument then include the OPC command at the end of each calibration command line as covered above Clear the SRQ by querying the ESR using the ESR q...

Страница 90: ...C CalibrationPrograms 135 1095 0799...

Страница 91: ...terface for the computer Two shielded IEEE 488 bus cables Keithley Model 7007 Software requirements To use the calibration program you will need the following computer software Microsoft QBasic suppli...

Страница 92: ...al multimeter primary address is set to 17 5 Make sure that the computer bus driver software CECHP EXE is properly initialized 6 Enter the QBasic editor and type in the program below Be sure to use th...

Страница 93: ...Use characterized 4 ohm value ThreeK 3000 Use characterized 3 k ohm value CLS PRINT Model 2303 2303B Calibration Program PRINT 1 OUTPUT 16 CAL PROT CODE KI002303 Unlock calibration PRINT 1 OUTPUT 16 C...

Страница 94: ...2 S PRINT 1 SPOLL 16 Clear SRQ INPUT 2 S RETURN ErrCheck Error check routine PRINT 1 OUTPUT 16 SYST ERR PRINT 1 ENTER 16 INPUT 2 E Err IF E 0 THEN PRINT Err GOTO EndProg RETURN ReadDMM Get reading fro...

Страница 95: ...4 Use characterized 4 ohm value ThirtyOhm 30 Use characterized 30 ohm value CLS PRINT Model 2303 PJ Calibration Program PRINT 1 OUTPUT 16 CAL PROT CODE KI002303 Unlock calibration PRINT 1 OUTPUT 16 CA...

Страница 96: ...S PRINT 1 SPOLL 16 Clear SRQ INPUT 2 S RETURN ErrCheck Error check routine PRINT 1 OUTPUT 16 SYST ERR PRINT 1 ENTER 16 INPUT 2 E Err IF E 0 THEN PRINT Err GOTO EndProg RETURN ReadDMM Get reading from...

Страница 97: ...D InstrumentControl 135 1095 0799...

Страница 98: ...ET The LSD for the current value will then blink 4 Use the edit keys to adjust the current value and press SET The display will then return to the readback mode no blinking digits Setting the display...

Страница 99: ...UR VOLT 10 SOUR CURR LIM 3 Setting the reading mode Use SENS FUNC to program the reading mode For example select DVM input readings with the following command SENS FUNC DVM Table D 1 Basic remote comm...

Страница 100: ...rdware and software requirements Program D 1 Basic control programming Program to send basic commands to 2303 Primary address 16 OPEN IEEE FOR OUTPUT AS 1 Open IEEE 488 output path OPEN IEEE FOR INPUT...

Страница 101: ...ont panel calibration 2 4 Front panel control D 2 Front panel disassembly 3 4 G General program instructions C 3 Generating an SRQ on calibration complete B 8 Generating an SRQ on error B 7 H Handling...

Страница 102: ...ecting the current range D 2 Setting output values D 3 Setting the display mode D 2 Setting the reading mode D 3 Software requirements C 2 Solder repairs 3 2 Specifications A 2 Status byte EAV Error A...

Страница 103: ...ro Unstable Overload Will not read applied input Calibration only Certificate of calibration required Data required attach any additional sheets as necessary Show a block diagram of your measurement i...

Страница 104: ...Keithley Instruments Inc 28775 Aurora Road Cleveland Ohio 44139 Printed in the U S A 135 1095 0799...

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