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Keithley SourceMeter 2400 Скачать руководство пользователя страница 56

2400-902-01 (G - Feb 2006)

Model 2400 Service Manual

4-2

Troubleshooting

Introduction

This section of the manual will assist you in troubleshooting and repairing the Model 2400.
Included are self-tests, test procedures, troubleshooting tables, and circuit descriptions. The
repair technician must select the appropriate tests and documentation needed to troubleshoot
the instrument. Note that disassembly instructions are located in Section 5, while component
layout drawings are at the end of Section 6.

WARNING

The information in this section is intended for qualified service personnel
only. Do not perform these procedures unless you are qualified to do so.
Some of these procedures may expose you to hazardous voltages that
could cause personal injury or death. Use caution when working with haz-
ardous voltages.

Repair considerations

Before making any repairs to the Model 2400, be sure to read the following considerations.

CAUTION

The PC boards are built using surface mount techniques and require spe-
cialized equipment and skills for repair. If you are not equipped and/or
qualified, it is strongly recommended that you send the unit back to the
factory for repairs or limit repairs to the PC board replacement level.
Without proper equipment and training, you could damage a PC board
beyond repair.

•

Repairs will require various degrees of disassembly. However, it is recommended that
the Front Panel Tests be performed prior to any disassembly. The disassembly instruc-
tions for the Model 2400 are contained in Section 5 of this manual.

•

Do not make repairs to surface mount PC boards unless equipped and qualified to do so
(see previous CAUTION).

•

When working inside the unit and replacing parts, be sure to adhere to the handling pre-
cautions and cleaning procedures explained in Section 5.

•

Many CMOS devices are installed in the Model 2400. These static-sensitive devices
require special handling as explained in Section 5.

•

Whenever a circuit board is removed or a component is replaced, the Model 2400 must
be recalibrated. See Section 2 for details on calibrating the unit.

Power-on self-test

During the power-on sequence, the Model 2400 will perform a checksum test on its ROM and
test its RAM. If the RAM tests fails, the instrument will lock up. If the ROM checksum test
fails, the firmware upgrade mode is automatically enabled. See Firmware upgrades at the end
of this section.

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Содержание SourceMeter 2400

Страница 1: ...Rev G February 2006 A G R E A T E R M E A S U R E O F C O N F I D E N C E www keithley com Model 2400 SourceMeter Service Manual 2400 902 01 Rev G February 2006 A G R E A T E R M E A S U R E O F C O...

Страница 2: ...ion without Keithley s express written consent or misuse of any product or part This warranty also does not apply to fuses software non rechargeable batteries damage from battery leakage or problems a...

Страница 3: ...Model 2400 SourceMeter Service Manual 1996 Keithley Instruments Inc All rights reserved Cleveland Ohio U S A Seventh Printing February 2006 Document Number 2400 902 01 Rev G...

Страница 4: ...rporated into the new Revision of the manual Each new Revision includes a revised copy of this print history page Revision A Document Number 2400 902 01 January 1996 Revision B Document Number 2400 90...

Страница 5: ...C Standard IEC 60664 Most measurement control and data I O signals are Measurement Category I and must not be directly connected to mains voltage or to voltage sources with high transient over voltage...

Страница 6: ...ing the combined effect of normal and common mode voltages Use standard safety precautions to avoid personal contact with these voltages The symbol indicates a connection terminal to the equipment fra...

Страница 7: ...6 Maximum compliance values 1 7 Determining compliance limit 1 7 Taking the SourceMeter out of compliance 1 8 Output voltage accuracy 1 8 Voltage measurement accuracy 1 10 Output current accuracy 1 11...

Страница 8: ...of operation 4 4 Analog circuits 4 4 Power supply 4 6 Output stage 4 7 A D converter 4 8 Active guard 4 8 Digital circuitry 4 8 Troubleshooting 4 10 Display board checks 4 10 Power supply checks 4 10...

Страница 9: ...B 3 Detecting calibration errors B 9 Reading the error queue B 9 Error summary B 9 Status byte EAV Error Available bit B 10 Generating an SRQ on error B 10 Detecting calibration step completion B 11...

Страница 10: ......

Страница 11: ...erification connections 1 15 2 Calibration Figure 2 1 Voltage calibration connections 2 9 Figure 2 2 Current calibration connections 2 12 3 Routine Maintenance Figure 3 1 Rear panel 3 3 4 Troubleshoot...

Страница 12: ...ted SENSe parameter ranges 2 17 Table 2 8 Voltage calibration initialization commands 2 18 Table 2 9 Voltage range calibration commands 2 19 Table 2 10 Current calibration initialization commands 2 20...

Страница 13: ...1 PerformanceVerification...

Страница 14: ...arranty and its performance is outside specified limits contact your Keithley representative or the factory to determine the correct course of action Verification test requirements Be sure that you pe...

Страница 15: ...of the recommended test equipment Table 1 1 Recommended verification equipment Description Manufacturer Model Accuracy Digital Multimeter Resistance calibrator Hewlett Packard HP3458A Fluke 5450A DC V...

Страница 16: ...d the Model 2400 normal accuracy specifications for your calculations As an example assume that you are testing the 20k range and the actual value of the nominal 19k calibrator resistor is 19 025k Usi...

Страница 17: ...0 output signal to settle before making a measurement Do not connect test equipment to the Model 2400 through a scanner multiplexer or other switching equipment WARNING The maximum common mode voltage...

Страница 18: ...nd the 20V range selected the source field display will appear as follows Vsrc 20 0000 V 4 With the source field cursor flashing set the source output to the required value using either The SOURCE adj...

Страница 19: ...for the measurement ranges are summarized as follows Measurement range Maximum compliance value 200mV 2V 20V 200V 1 A 10 A 100 A 1mA 10mA 100mA 1A 210mV 2 1V 21V 210V 1 05 A 10 5 A 105 A 1 05mA 10 5mA...

Страница 20: ...e output voltage to each full range value and measuring the voltages with a precision digital multimeter 1 With the power off connect the digital multimeter to the Model 2400 INPUT OUTPUT jacks as sho...

Страница 21: ...0 902 01 G Feb 2006 1 9 Model 2400 Series User s Manual Performance Verification 5 Repeat the procedure for negative output voltages with the same magnitudes as those listed in Table 1 2 6 Repeat the...

Страница 22: ...voltage accuracy for each of the voltages listed in Table 1 3 For each test point Select the correct source range Set the Model 2400 output voltage to the indicated value as measured by the digital m...

Страница 23: ...the Model 2400 INPUT OUTPUT jacks as shown in Figure 1 2 2 Select the multimeter DC current measuring function 3 Press the Model 2400 SOURCE I key to source current and make sure the source out put is...

Страница 24: ...1 00095 A 9 9947 to 10 0053 A 99 949 to 100 051 A 0 99946 to 1 00054mA 9 9935 to 10 0065mA 99 914 to 100 086mA 0 99640 to 1 00360A Current measurement accuracy Follow the steps below to verify that M...

Страница 25: ...led to source range when simultaneously sourcing and measuring current As measured by precision digital multimeter Use closest possible value and modify reading limits accordingly if necessary Resista...

Страница 26: ...ble 6 Repeat the entire procedure using the rear panel INPUT OUTPUT and 4 WIRE SENSE jacks Be sure to select the rear panel jacks with the front panel TERMINALS key Table 1 6 Ohms measurement accuracy...

Страница 27: ...EAR AUTO RANGE EXIT ENTER CONFIG MENU SWEEP TRIG REL LOCAL FILTER LIMIT DIGITS SPEED V MEAS I FCTN V I SOURCE 2 3 0 1 6 7 8 9 4 5 STORE RECALL EDIT Model 2400 Resistance Calibrator Output LO Sense LO...

Страница 28: ...2400 902 01 G Feb 2006 Model 2400 Service Manual 1 16 Performance Verification...

Страница 29: ...2 Calibration...

Страница 30: ...mental conditions Temperature and relative humidity Conduct the calibration procedures at an ambient temperature of 18 28 C 65 82 F with relative humidity of less than 70 unless otherwise noted Warm u...

Страница 31: ...can cause damage to the equipment or expose the operator to hazardous volt age Hazardous voltages may be present on the output and guard terminals To prevent electrical shock that could cause injury...

Страница 32: ...00 A 1mA 10mA 100mA 1A 55ppm 25ppm 23ppm 20ppm 20ppm 35ppm 110ppm 90 day specifications show accuracy at specified measurement point Unlocking calibration Before performing calibration you must first...

Страница 33: ...NS CURR RANG Table 2 2 Calibration unlocked states Mode State Equivalent remote command Concurrent Functions Sense Function Sense Volts NPLC Sense Volts Range Sense Current NPLC Sense Current Range Fi...

Страница 34: ...word Remote password To change the calibration password via remote first send the present password and then send the new password For example the following command sequence changes the password from t...

Страница 35: ...12 15 95 Count 00001 Calibration errors The Model 2400 checks for errors after each calibration step minimizing the possibility that improper calibration may occur due to operator error Front panel er...

Страница 36: ...to return to normal display Instrument operating states will be set as sum marized in Table 2 2 Step 2 Voltage calibration Perform the steps below for each voltage range using Table 2 3 as a guide 1 C...

Страница 37: ...ys to select the digit value and use the left and right arrow keys to choose the digit position Note that the display adjustment range is within 10 of the present range 9 After adjusting the display t...

Страница 38: ...nd simultaneously display the following DMM RDG 000 0000mV Use ENTER or EXIT 17 Note and record the DMM reading and then adjust the display to agree with the DMM reading Once again the maximum adjustm...

Страница 39: ...00V 000 00V ___________mV ___________mV ___________mV ___________mV ____________Vm ____________Vm ____________Vm ____________Vm ____________Vm ____________Vm ____________Vm ____________Vm ___________...

Страница 40: ...normal display press MENU 5 Select CAL and then press ENTER The unit will display the following CALIBRATION UNLOCK EXECUTE VIEW DATES SAVE LOCK CHANGE PASSWORD 6 Select EXECUTE and then press ENTER Th...

Страница 41: ...present range 12 After adjusting the display value to agree with the DMM reading press ENTER The unit will then display the following I CAL Press ENTER to Output 1 0000 A 13 Press ENTER The Model 2400...

Страница 42: ...00 A 000 00 A 100 00 A 000 00 A 1 0000mA 0 0000mA 1 0000mA 0 0000mA 10 000mA 00 000mA 10 000mA 00 000mA 100 00mA 000 00mA 100 00mA 000 00mA 1 0000A 0 0000A 1 0000A 0 0000A ____________ A ____________...

Страница 43: ...will then prompt for the calibration due date NEXT CAL 12 15 96 Use ENTER or EXIT 7 Set the calibration due date to the desired value and then press ENTER Press ENTER again to confirm the date 8 Once...

Страница 44: ...CALibration PROTected CODE password COUNT SAVE LOCK LOCK DATE y m d DATE NDUE y m d NDUE SENSe nrf DATA SOURce nrf DATA Calibration subsystem Cal commands protected by password Unlock cal changes pas...

Страница 45: ...PROTected SOURce parameter ranges Source range First parameter negative full scale Second parameter negative zero Third parameter positive full scale Fourth parameter positive zero 0 2V 2V 20V 200V 1...

Страница 46: ...voltage cal ibration When the CAL PROT CODE command is sent the instrument will assume the operating states listed in Table 2 2 Table 2 8 Voltage calibration initialization commands Command Descripti...

Страница 47: ...rce function negative zero Establish positive polarity Read actual output value Calibrate sense function positive full scale Calibrate source function positive full scale Set output to 0V Read actual...

Страница 48: ...initialization commands Command Description SOUR FUNC CURR SENS VOLT PROT 20 SENS VOLT RANG 20 OUTP STAT ON Select source current mode Voltage limit when current source is active Make sure 200V range...

Страница 49: ...full scale Set output to 0A Read actual output value Calibrate sense function negative zero Calibrate source function negative zero Establish positive polarity Read actual output value Calibrate sense...

Страница 50: ...on constants in EEROM by sending the following command CAL PROT SAVE NOTE Calibration will be temporary unless you send the SAVE command Also calibration data will not be saved if 1 calibration is loc...

Страница 51: ...3 RoutineMaintenance...

Страница 52: ...see Figure 3 1 Perform the following steps to replace the line fuse 1 Carefully grasp and squeeze together the locking tabs that secure the fuse carrier to the fuse holder 2 Pull out the fuse carrier...

Страница 53: ...TPUT 250V PEAK 250V PEAK TRIGGER LINK 4 WIRE SENSE HI LO LINE RATING 100 240VAC 50 60 Hz 190VA MAX RS 232 IEEE 488 ENTER IEEE ADDRESS WITH FRONT PANEL MENU 250V PEAK 5V PEAK 5V PEAK 5V PK V GUARD GUAR...

Страница 54: ...2400 902 01 G Feb 2006 Model 2400 Service Manual 3 4 Routine Maintenance...

Страница 55: ...4 Troubleshooting...

Страница 56: ...is strongly recommended that you send the unit back to the factory for repairs or limit repairs to the PC board replacement level Without proper equipment and training you could damage a PC board beyo...

Страница 57: ...ST MENU Continue pressing EXIT to back out of the menu structure DISPLAY PATTERNS test The display test allows you to verify that each pixel and annunciator in the vacuum fluorescent display is workin...

Страница 58: ...s the overall block diagram for the Model 2400 D A converters control the programmed voltage and current or voltage compliance and current compliance Each DAC has two ranges a 10V output or a 1V outpu...

Страница 59: ...feedback current feedback reference or ground signal to the A D converter An opto isolated interface provides control signals for both DACs analog circuit control and A D converter communication to t...

Страница 60: ...See Digital circuitry A constant frequency switching supply runs off the 12VD supplies and generates all the float ing supply voltages for the analog board 5VF 15VF and 30VF An AC output low volt age...

Страница 61: ...nt the possibility of thermal runaway with high current output values High current taps for the 20V outputs are provided to reduce power dissipation on the 20V and lower ranges Output transistors Q518...

Страница 62: ...ola 68332 microcontroller running at 16 78MHz The memory configuration includes two 256K 8 bit EEPROMS and two 128K 8 bit RAMs used in parallel to utilize the 16 bit data bus of the MPU The RAM is bat...

Страница 63: ...a cursor The display uses a common multiplexing scheme with each character refreshed in sequence U903 and U904 are the grid drivers and U901 and U905 are the dot drivers Note that dot driver and grid...

Страница 64: ...Brief pulse train when front panel key is pressed Use front panel display test Digital 5V supply Display 37V supply Microcontroller RESET Controller 4MHz clock Control from main processor Key down da...

Страница 65: ...train during IEEE 488 I O Pulses during IEEE 488 I O Low with remote enabled Low during interface clear Pulse train Pulse train Pulse train Pulse train Verify that RAM and ROM are functional All sign...

Страница 66: ...r BA 44 which is located on the digital board Use only the recommended part number Replacement of the battery requires removal of the case cover analog shield and analog board assembly See Section 5 W...

Страница 67: ...at one of the main processor ROMs may require re seating in its socket ROMs may be reseated as follows 1 Turn off the power and disconnect the line cord and all other test leads and cables from the in...

Страница 68: ...2400 902 01 G Feb 2006 Model 2400 Service Manual 4 14 Troubleshooting...

Страница 69: ...5 Disassembly...

Страница 70: ...ear cotton gloves Only handle PC boards by the edges and shields Do not touch any board traces or components not associated with repair Do not touch areas adjacent to electrical contacts Use dry nitro...

Страница 71: ...ices from their protective containers only at a properly grounded work station Ground yourself with a suitable wrist strap Handle the devices only by the body do not touch the pins Ground any printed...

Страница 72: ...e of the chassis Each ear is marked RIGHT or LEFT on its inside surface 3 Remove Rear Bezel To remove the rear bezel loosen the two screws that secure the rear bezel to the chassis and then pull the b...

Страница 73: ...screws are located on the side of the board opposite from the heat sink Remove the two screws that secure the heat sink to the chassis 5 Remove analog board assembly After all screws have been removed...

Страница 74: ...til it is free of the guide pins then remove the board During reassembly replace the board and start the IEEE 488 Digital I O and RS 232 connector nuts and the mounting screw Tighten all the fasteners...

Страница 75: ...cts to a threaded stud on the chassis with a kep nut 4 Squeeze the latches on either side of the power module while pushing the module from the access hole WARNING To avoid electrical shock which coul...

Страница 76: ...2400 902 01 G Feb 2006 Model 2400 Service Manual 5 8 Disassembly...

Страница 77: ...6 ReplaceableParts...

Страница 78: ...he various mechanical parts and assemblies use the Miscellaneous parts list and the assembly drawings provided at the end of Section 5 Ordering information To place an order or to obtain information c...

Страница 79: ...rn Material Authorization RMA number Complete the service form at the back of this manual and include it with the instrument Carefully pack the instrument in the original packing carton Write ATTENTIO...

Страница 80: ...C 483 100 C312 319 329 CAP 10PF 5 100V CERAMIC C 372 10P C320 323 326 603 604 615 CAP 47P 5 100V CERAMIC C 465 47P C330 CAP 100PF 2 5 630V POLYPROPYLENE C 405 100P C331 334 CAP 100PF 5 100V CERAMIC C...

Страница 81: ...NNEL JFET SNJ132199 TG 294 Q208 210 212 214 216 218 TRANS NPN CATV SILICON MPSH17 TG 221 Q209 211 213 215 217 219 TRANS CURRENT REGULATOR CR430 TG 219 Q220 225 TRANS NPN SILICON MJE340 TG 209 Q221 226...

Страница 82: ...373 482 483 RES 49 9K 1 100MW THICK FILM R 418 49 9K R224 229 234 237 244 247 281 282 284 286 288 301 617 622 654 655 RES 10K 1 100MW THICK FILM R 418 10K R240 243 248 251 253 254 257 258 261 262 265...

Страница 83: ...9 521 525 526 549 RES 10 10 100MW THICK FILM R 418 10 R516 523 531 RES 4 02K 1 100MW THICK FILM R 418 4 02K R517 524 538 541 RES 12 1 1 125MW METAL FILM R 391 12 1 R542 543 RES 5 5 1W METAL R 444 5 R5...

Страница 84: ...231 235 IC OP AMP LOW POWER AD795JR IC 1052 U234 IC OP AMP OPA602 IC 1049 U238 IC CMOS ANA SWITCH SPST MAX326CSE IC 909 U239 IC QUAD 2 INPUT NAND 74HC00M IC 781 U240 IC POS NAND GATES INVERT 74HCT14...

Страница 85: ...5 DIODE ZENER 8 2V MMBZ5237 DZ 92 VR216 217 DIODE ZENER 17V MMBZ5247BL DZ 104 VR400 401 DIODE ZENER 4 7V IN4732A DZ 67 VR403 601 604 DIODE ZENER 3 3V MMBZ5226BL DZ 94 VR404 406 DIODE ZENER 5 1V BZX84C...

Страница 86: ...5 52 55 CAP 22UF 20 25V TANTALUM C 440 22 C48 57 58 CAP 1000PF 10 50V MONO CERAMIC C 452 1000P C62 CAP 10UF 20 25V TANTALUM C 440 10 C65 CAP 022UF 10 50V CERAMIC C 491 022 C74 75 CAP 470UF 20 25V ALUM...

Страница 87: ...18 4 75K R29 39 46 RES 0499 1 100MW THICK FILM R 418 0499 R30 26 RES 100 1 100MW THICK FILM R 418 100 R38 RES 14K 1 125MW METAL FILM R 391 14K R24 27 32 40 RES 5 1K 5 125MW METAL FILM R 375 5 1K R51 R...

Страница 88: ...AMMED ROM 2400 804 U17 IC SERIAL EPROM 24LC16B LSI 153 U18 IC 5V VOLTAGE REGULATOR LM2940CT IC 576 U19 IC SCHMITT TRIGGER NAND GATE IC 950 U20 IC OCTAL INTERFACE BUS 75160 IC 646 U21 IC DUAL POWER MOS...

Страница 89: ...ONN HEADER STRAIGHT SOLDER PIN CS 368 16 Q901 902 TRANS NPN GEN PURPOSE BC868 TG 293 R901 RES NET 15K 2 1 875W TF 219 15K R902 RES 13K 5 125MW METAL FILM R 375 13K R903 904 RES 4 7K 5 250MW METAL FILM...

Страница 90: ...M FU 106 2 5 1 HANDLE 428 329F 1 HEAT SINK 2400 308A 1 LEFT MOUNTING EAR 428 338B 1 LINE CORD CO 7 1 LINE FILTER LF 11 1 MEMBRANE SWITCH FRONT PANEL 2400 313A 1 POWER ROD 704 313A 1 POWER SUPPLY PS 41...

Страница 91: ...A Specifications...

Страница 92: ...MITS 2400 2400 C 1 05A 21V 105 mA 210V 2400 LV 1 05A 21V CURRENT REGULATION Line 0 01 of range Load 0 01 of range 100pA VOLTAGE LIMIT Bipolar voltage limit compliance set with single value Min 0 1 of...

Страница 93: ...3 00 16 5 52 5 RESISTANCE MEASUREMENT ACCURACY LOCAL OR REMOTE SENSE RANGE DEFAULT RESOLUTION DEFAULT TEST CURRENT NORMAL ACCURACY 23 C 5 C 1 YEAR rdg ohms ENHANCED ACCURACY 23 C 5 C 5 1 YEAR rdg ohm...

Страница 94: ...source auto clear off 2 Purely resistive load 1 A and 10 A ranges 65ms 3 1000 point sweep was characterized with the source on a fixed range 4 Pass Fail test performed using one high limit and one lo...

Страница 95: ...ration SOURCE SINK LIMITS 1 05A 21V 21 mA 1100V CURRENT REGULATION Line 0 01 of range Load 0 01 of range 1nA VOLTAGE LIMIT Bipolar voltage limit compliance set with single value Min 0 1 of range OVERS...

Страница 96: ...r verification and notification CONTACT CHECK 2 15 50 No contact check failure 1 00 13 5 47 5 Always contact check failure 3 00 16 5 52 5 RESISTANCE MEASUREMENT ACCURACY LOCAL OR REMOTE SENSE RANGE DE...

Страница 97: ...10 A ranges 65ms 3 1000 point sweep was characterized with the source on a fixed range 4 Pass Fail test performed using one high limit and one low math limit 5 Includes time to re program source to a...

Страница 98: ...our quadrant source or sink operation SOURCE SINK LIMITS 3 15A 21V 1 05A 63V CURRENT REGULATION Line 0 01 of range Load 0 01 of range 100pA VOLTAGE LIMIT Bipolar voltage limit compliance set with sing...

Страница 99: ...RESISTANCE MEASUREMENT ACCURACY LOCAL OR REMOTE SENSE RANGE DEFAULT RESOLUTION DEFAULT TEST CURRENT NORMAL ACCURACY 23 C 5 C 1 YEAR rdg ohms 0 20000 4 Source IACC Meas VACC 2 00000 10 1 A 0 17 0 0003...

Страница 100: ...xed range 4 Pass Fail test performed using one high limit and one low math limit 5 Includes time to re program source to a new level before making measurement 6 Time from falling edge of START OF TEST...

Страница 101: ...C 0 15 accuracy specification C MAX OUTPUT POWER 110W four quadrant source or sink operation SOURCE SINK LIMITS 3 15A 21V 1 05A 105V CURRENT REGULATION Line 0 01 of range Load 0 01 of range 100pA VOLT...

Страница 102: ...1 00 13 5 47 5 Always contact check failure 3 00 16 5 52 5 RESISTANCE MEASUREMENT ACCURACY LOCAL OR REMOTE SENSE RANGE DEFAULT RESOLUTION DEFAULT TEST CURRENT NORMAL ACCURACY 23 C 5 C 1 YEAR rdg ohms...

Страница 103: ...1000 point sweep was characterized with the source on a fixed range 4 Pass Fail test performed using one high limit and one low math limit 5 Includes time to re program source to a new level before m...

Страница 104: ...20V range ADDITIONAL SOURCE SPECIFICATIONS TRANSIENT RESPONSE TIME 30 s minimum for the output to recover to its spec following a step change in load COMMAND PROCESSING TIME Maximum time required for...

Страница 105: ...contact check failure 3 00 16 5 52 5 RESISTANCE MEASUREMENT ACCURACY LOCAL OR REMOTE SENSE RANGE DEFAULT RESOLUTION DEFAULT TEST CURRENT NORMAL ACCURACY 23 C 5 C 1 YEAR rdg ohms 0 20000 4 Source IACC...

Страница 106: ...nge 65ms 3 1000 point sweep was characterized with the source on a fixed range 4 Pass Fail test performed using one high limit and one low math limit 5 Includes time to re program source to a new leve...

Страница 107: ...A 0 10 5 4 mA 500 A TEMPERATURE COEFFICIENT 0 18 C 28 50 C 0 15 accuracy specification C MAX OUTPUT POWER 55W four quadrant source or sink operation SOURCE SINK LIMITS 5 25A 10 5V 1 05A 42V CURRENT R...

Страница 108: ...ification and notification CONTACT CHECK 2 15 50 No contact check failure 1 00 13 5 47 5 Always contact check failure 3 00 16 5 52 5 RESISTANCE MEASUREMENT ACCURACY LOCAL OR REMOTE SENSE RANGE DEFAULT...

Страница 109: ...nt sweep was characterized with the source on a fixed range 4 Pass Fail test performed using one high limit and one low math limit 5 Includes time to re program source to a new level before making mea...

Страница 110: ...the actual reading range is 10V 3mV or from 9 997 to 10 003V DC current measurement calculations are performed in exactly the same manner using the pertinent specifications ranges and input signal val...

Страница 111: ...B CommandReference...

Страница 112: ...l commands protected by password Unlock cal If cal is unlocked changes password Default password KI002400 Query number of times 2400 has been calibrated Save calibration data to EEPROM Lock calibratio...

Страница 113: ...default remote password is KI002400 Note The CODE command should only be sent once before performing cali bration Do not send CODE before each calibration step To change the code first send the prese...

Страница 114: ...tion constants in EEROM after the calibration procedure Format cal prot save Description The SAVE command stores internally calculated calibration constants derived during comprehensive in EEROM EEROM...

Страница 115: ...month and day parameters must be delimited by commas Example CAL PROT DATE 1995 11 20 Send cal date 11 20 95 NDUE CALibration PROTected NDUE Purpose To send the next calibration due date to the instru...

Страница 116: ...will be generated If no error occurs the active sense function range point will be calibrated using the corresponding parameter Note that parameters for a given sense function and range may be sent i...

Страница 117: ...ill then check to see if the active source is programmed to a value within the selected parameter range and that OUTP STAT is ON If the active source is not programmed to a value within the parameter...

Страница 118: ...to 0 02 0 2 to 0 2 2 to 2 1E 8 to 1E 8 1E 7 to 1E 7 1E 6 to 1E 6 1E 5 to 1E 5 1E 4 to 1E 4 1E 3 to 1E 3 1E 2 to 1E 2 B 8 Command Reference DATA CALibration PROTected SENSe DATA CALibration PROTected S...

Страница 119: ...502 Will occur when the CAL PROT SENS or CAL PROT SOUR command is sent with a parameter that cannot be placed into any of the defined numeric ranges Error 503 504 Will occur when the source complianc...

Страница 120: ...lable bit Whenever an error is available in the error queue the EAV Error Available bit bit 2 of the status byte will be set Use the STB query to obtain the status byte then test bit 2 to see if it is...

Страница 121: ...also be used to detect the completion of each calibration step In order to use OPC to detect the end of each calibration step perform the following 1 Enable operation complete by sending ESE 1 This co...

Страница 122: ...400 To use this method send both ESE 1 and SRE 32 to the instrument and then include the OPC command at the end of each calibration command line as previously discussed Clear the SRQ by querying the E...

Страница 123: ...C CalibrationPrograms...

Страница 124: ...ompatible computer Keithley KPC 488 2 KPS 488 2 or KPC 488 2AT or CEC PC 488 IEEE 488 inter face for the computer Two shielded IEEE 488 connecting cables Keithley Model 7007 Software requirements In o...

Страница 125: ...thoroughly for errors and then save it using a convenient filename 7 Run the program and follow the prompts on the screen to perform calibration Program C 1 Model 2400 calibration program Model 2400...

Страница 126: ...CASE 5 11 PRINT 1 OUTPUT 24 Cmd GOSUB ReadDMM CASE 8 PRINT 1 OUTPUT 24 Cmd Range GOSUB ReadDMM END SELECT NEXT I Range Range 10 WEND NEXT J LINE INPUT Enter calibration date yyyy mm dd D PRINT 1 OUTPU...

Страница 127: ...Calibration aborted PRINT 1 OUTPUT 24 CAL PROT LOCK PRINT 1 OUTPUT 24 RST PRINT 1 LOCAL 22 24 CLOSE END VoltsInit Calibration command lists DATA RST SOUR FUNC VOLT SENS CURR PROT 0 1 DATA SENSE CURR R...

Страница 128: ...terminator PRINT 1 REMOTE 24 Put 2400 in remote PRINT 1 OUTPUT 24 RST Restore defaults CLS PRINT 1 OUTPUT 24 SENS FUNC CONC OFF PRINT 1 OUTPUT 24 SENS FUNC VOLT DC PRINT 1 OUTPUT 24 SOUR FUNC VOLT PRI...

Страница 129: ...TPUT 24 SOUR CURR RANGE Range PRINT 1 OUTPUT 24 CAL PROT SENS DATA PRINT 1 ENTER 24 LINE INPUT 2 Data PRINT Data PRINT 1 OUTPUT 24 CAL PROT SOUR DATA PRINT 1 ENTER 24 LINE INPUT 2 Data PRINT DATA Rang...

Страница 130: ...C 8 Calibration Programs...

Страница 131: ...hardware requirements C 2 Connections voltage calibration 2 9 Current accuracy 1 11 Output 1 11 readback 1 12 Current measurement accuracy limits 1 13 D Detecting calibration errors B 9 Error summary...

Страница 132: ...am C 2 Requesting calibration constants C 6 R Recommended calibration equipment 2 4 Recommended test equipment 1 3 Recommended verification equipment 1 3 Remote calibration 2 16 command summary 2 16 p...

Страница 133: ...ication 1 2 Verification test requirements 1 2 Viewing calibration dates and calibration count 2 7 Voltage accuracy 1 6 limit 1 10 readback 1 10 Voltage measurement accuracy limits 1 10 W Warm up peri...

Страница 134: ......

Страница 135: ...to zero 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 measurem...

Страница 136: ......

Страница 137: ...d Cleveland Ohio 44139 440 248 0400 Fax 440 248 6168 1 888 KEITHLEY 534 8453 www keithley com 12 04 Specifications are subject to change without notice All Keithley trademarks and trade names are the...

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