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Model 2410 1100V SourceMeter®

1. ErrCheck Error check routine PRINT 1 OUTPUT 24 SYST ERR Query error queue PRINT 41 ENTER 24 INPUT 2 E Err IF E lt gt 0 THEN PRINT Err GOTO EndProg Display error RETURN ReadDMM Get reading from DMM SLEEP 5 PRINT 41 ENTER 22 INPUT 2 Reading RETURN EndProg Close files end program BEEP PRINT Calibration aborted PRINT 1 OUTPUT 24 CAL PROT LOCK PRINT 1 OUTPUT 24 RST PRINT 41 LOCAL 22 24 CLOSE END VoltsInit Calibration command lists DATA RST SOUR FUNC VOLT SENS CURR PROT 0 01 DATA Sl DATA CAL VoltsCal DATA DATA CAL DATA CAL DATA CAL CurrentIni DATA SOU DATA OUT CurrentCal DATA DATA DATA DATA SOUR VOLT RANG SOUR VOLT SOU CAL SOU SOU ENS CURR RANG 0 01 SOUR VOLT PROT LEV MAX SYST RSEN OFF PROT CODE KI002410 OUTP STAT ON PROT SOUR CAL PROT SENS SOUR VOLT 0 0 PROT SOUR CAL PROT SENS SOUR VOLT CAL PROT SOUR PROT SENS SOUR VOLT 0 0 CAL PROT SOUR FUNC CURR SENS VO STAT ON PROT 20 SENS VOLT RANG 20 d ct R CURR RANG SOUR CURR CAL PROT SOUR PROT SENS SOUR CURR 0 0 CAL PROT SOUR CAL PROT SENS R CURR CAL PROT SOUR CAL PROT SENS R CURR 0 0 CAL PROT iSOUR
2. 6 Replaceable Parts Analog board parts list ener Digital board parts list Display board parts liSt essen Mechanical parts list eiie nare B Command Reference Remote calibration command summary eese B 2 Recommended CALibration PROTected SENSe B 7 parameter ranges Recommended CALibration PROTected SOURce parameter ranges Calibration errors Performance Venfication 1 2 Performance Verification Introduction Use the procedures in this section to verify that Model 2410 accuracy is within the limits stated in the instrument s one year accuracy specifications You can perform these verification procedures When you first receive the instrument to make sure it was not damaged during shipment To verify that the unit meets factory specifications determine if calibration is required Following calibration to make sure it was performed properly WARNING The information in this section is intended for qualified service personnel only D o not attempt these procedures unless you are qualified to do so Some of these procedures may expose you to hazardous voltages which could cause personal injury or death if contacted U se standard safety pre cautions when working with hazardous voltages NOTE If the instr
3. Calibration Programs C 7 Requesting calibration contants Program C 2 listed below demonstrates how to request the calibration constants from the Model 2410 The program requests and displays the calibration constants for all ranges of both the volts and current source and measurement functions Program C 2 Requesting calibration constants Example program to request calibration constants Model 2410 primary address 24 OPEN IEEE FOR OUTPUT AS 1 Open IEEE 488 output path OPEN IEEE FOR INPUT AS 42 Open IEEE 488 input path PRINT 1 INTERM CRLE Set input terminator PRINT 41 OUTTERM LF Set output terminator PRIN 1 REMOTE 24 Put 2410 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 PRINT 1 OUTPUT 24 CAL PROT CODE KI002410 Unlock calibration Range 2 Initial range 200mV PRINT Model 2410 Voltage Calibration Constants PRINT DO Loop for all volts ranges PRINT 41 OUTPUT 24 SOUR VOLT RANGE Range PRINT 41 OUTPUT 24 CAL PROT SENS DATA PRI 1 ENTER 24 LINE INPUT 2 Data PRINT Data PRINT 1 OUTPUT 24 CAL PROT SOUR DATA PRI 1 ENTER 24 LINE
4. SENS VOLT PROT 20 OUTP STAT ON Turn source on Voltage limit when current source is active SENS VOLT RANG 20 Make sure 1000V range is not active Table 2 11 Current range calibration commands Step Command procedure Description SOUR CURR RANGE lt Range gt SOUR CURR lt Source_value gt Take DMM reading Check 2410 for errors Check 2410 for errors SOUR CURR 0 0 Take DMM reading tA Q 11 Check 2410 for errors 13 Check 2410 for errors 14 SOUR CURR Source value 15 Take DMM reading 17 Check 2410 for errors 19 Check 2410 for errors 20 SOUR CURR 0 0 2 Take DMM reading CAL PROT SOUR DMM Reading CAL PROT SENS DMM Reading 10 CAL PROT SOUR DMM Reading 12 CAL PROT SENS DMM Reading 16 CAL PROT SOUR DMM Reading 18 CAL PROT SENS DMM Reading 22 CAL PROT SOUR DMM Reading Select source range Establish negative full range polarity Read actual output value Calibrate sense function negative full scale Calibrate source function negative full scale Set output to Read actual output value Calibrate sense function negative zero Calibration source function negative zero Establish positive full range polarity Read actual output value Calibrate sense function positive full scale Calibrate source function positive full scale Set output to 0A
5. Order current firmware revision For example 7001 800 A02 6 16 Replaceable Parts Table 6 4 Mechanical parts list Quantity D ecription Keithley part no 4 BANANA JACK PUSH IN BLACK BJ 13 0 1 BANANA JACK PUSH IN BLUE BJ 13 6 4 BANANA JACK PUSH IN RED BJ 13 2 1 BANANA JACK PUSH IN WHITE BJ 13 9 1 BEZEL REAR 428 303D 1 BOTTOM SHIELD 2400 309A 4 CHOKE CH 58 1A 1 COVER 2400 317B 1 DISPLAY LENS 2410 311B 2 FOOT EXTRUDED FE 22A 2 FOOT RUBBER FE 6 1 FUSE 2 5A 5 X 20MM FU 106 2 5 1 HANDLE 428 329F 1 HEAT SINK 2400 308E 2 HOLDER FERRITE 2001 367A 1 LED HIGH POWER PL 94 1 LENS LED 6517 309A 1 LINE CORD CO 7 1 LINE FILTER LF 11 1 MEMBRANE SWITCH FRONT PANEL 2410 313B 1 MOUNTING EAR LEFT 428 338B 1 MOUNTING EAR RIGHT 428 328E 1 POWER SUPPLY PS 41B 1 SWITCHPAD 2400 315A 1 TEST LEADSET CA 23 Specifications A 6 Specifications Accuracy calculations The information below discusses how to calculate accuracy for both measurement and source functions Measurement accuracy Measurement accuracy is calculated as follows Accuracy of reading offset As an example of how to calculate the actual reading limits assume that you are measuring 10V on the 20V range You can compute the reading limit range from one year measure voltage accuracy specifications as follows Accuracy of reading offset z 0 01596 x 10V ImV z l 5mV ImV 2 5mV Thus the a
6. Model 2410 1100V SourceMeter Service Manual KEITHLEY 4 WIRE INPUT SENSE OUTPUT A 1 3 5 2 LOCAL REL FILTER LIMIT TRIG SWEEP 8 ON OFF 9 E DISPLAY TOGGLE 0 POWER 6 7 5 Q DIGITS SPEED STORE RECALI ONFIGI MENU EXIT ENTER OUTPUT Contains Calibrating and Servicing Information KEITHLEY Warranty Keithley Instruments Inc warrants this product to be free from defects in material and work manship for a period of 1 year from date of shipment Keithley Instruments Inc warrants the following items for 90 days from the date of ship ment probes cables rechargeable batteries diskettes and documentation During the warranty period we will at our option either repair or replace any product that proves to be defective To exercise this warranty write or call your local Keithley representative or contact Keithley headquarters in Cleveland Ohio You will be given prompt assistance and return instructions Send the product transportation prepaid to the indicated service facility Repairs will be made and the product returned transportation prepaid Repaired or replaced products are warranted for the balance of the original warranty period or at least 90 days Limitation of Warranty This warranty does not apply to defects resulting from product modification without Kei thley s express written consent or misuse of any product or part This warranty also does not apply to fuses
7. nennen enne Calibration considerations Front panel calibration eese enne Remote calibration cer eet in Single range 3 Routine Maintenance D FOUCti m P E 3 2 Line fuse replacement een eicere Beats 3 2 4 Troubleshooting INIFOGUCHON E Repair considerations iii Poweron Sself test u Front panel tests nn Principles of Troubleshooting sini u terre sasi Analog circuitry checks Battery replacement eer ier tret ee eee etie eres No coMmmi linkert r RC 5 Disassembly Inttoduction M Handling and cleaning iii Static sensitive devices a a ass sentent Assembly drawings iei uhan cote metet ros tin CASe COVELTEMOVali M Analog board removal i Digital board removal nennen Front panel disassembly esee Removing power Instrument re asseMDLy e 6 Replaceable Parts IntFoOd ction u u liana nia Parts ge EE Ordering JDfOFtDation iie de reote repere torso Let Factory SErVICE E Component layouts ins ee e
8. 100uA 1 6 to 1E 6 90E 6 to 110E 6 90E 6 to 110E 6 ImA 1E 5to 1E 5 0 9E 3 to 1 1E 3 0 9E 3 to 1 1E 3 20mA 1E 4to 1E 4 18E 3 to 22E 3 18E 3 to 22E 3 100mA 1E 3 to 1E 3 90 3 to 110E 3 90E 3 to 110E 3 1E 2to 1E 2 0 9 to 1 1 0 9 to 1 1 Note Actual allowable parameter ranges are 50 of full range for zero parameters 75 of full scale to 150 of full scale for full range parameters but ranges listed above should be observed for optimum calibration B 8 Command Reference SO U Rce CALibration PRO Tected SO U Rce Purpose Format Parameters Description Note Example To calibrate the source function cal prot sour lt nrf gt See Table B 3 for recommended parameter ranges The CAL PROT SOUR command calibrates the Model 2410 source func tion To use this command you must 1 program the source to the correct value 2 select the range being calibrated and 3 send the CAL PROT SOUR command for each parameter listed in Table B 3 When the Model 2410 receives this command it will attempt to place the parameter into one of the four parameter ranges summarized in Table B 3 depending on the active SOUR FUNC and range If the parameter does not fit into any of the four allowed ranges error number 222 Parameter data out of range will be generated Once the unit has successfully selected the appropriate parameter range it will then check to see if the ac
9. 15 16 17 18 19 20 21 Note and record the DMM reading and then adjust the Model 2410 display to agree exactly with the actual DMM reading Use the up and down arrow keys to select the digit value and use the left and right arrow keys to choose the digit position or use the num ber keys 0 9 Note that the display adjustment range is within 10 of the present range After adjusting the display to agree with the DMM reading press ENTER The instru ment will then display the following V CAL Press ENTER to Output 000 00mV Press ENTER The Model 2410 will source OmV and at the same time display the following DMM RDG 000 0000mV Use 44 p A V ENTER or EXIT Note and record the DMM reading and then adjust the Model 2410 display to agree with the actual DMM reading Note that the display value adjustment limits are within 1 of the present range After adjusting the display value to agree with the DMM reading press ENTER The unit will then display the following V CAL Press ENTER to Output 200 00mV Press ENTER The Model 2410 will source 200mV and display the following DMM RDG 200 0000mV Use 4 p A V ENTER or EXIT Note and record the DMM reading and then adjust the Model 2410 display to agree with the DMM reading Again the maximum display adjustment is within 10 of the present range After adjusting the display value to agree with the DMM reading press ENTER and no
10. Read actual output value Calibrate source positive zero Perform complete procedure for each range where Range and Source value 1E 6 10E 6 100E 6 1E 3 20E 3 100E 3 or 1 2 DMM Reading parameter is the multimeter reading from the previous step 3 Use SYST ERR query to check for errors Calibration 2 23 Step 4 Program calibration dates Use following commands to set the calibration date and calibration due date CAL PRO T DATE year month day Calibration date CAL PRO T N DUE year month day N ext calibration due date Note that the year month and day must be separated by commas The allowable range for the year is from 1996 to 2095 the month is from 1 to 12 and the day is from to 31 Step 5 Save calibration constants Calibration is now complete so you can store the calibration constants in EEROM by sending the following command CAL PRO T SAVE NOTE Calibration will be temporary unless you send the SAVE command Also calibration data will not be saved if 1 calibration is locked 2 invalid data exists or 3 all steps were not completed Step 6 Lock out calibration To lock out further calibration send the following command after completing the calibration procedure CAL PRO T LO CK 2 24 Calibration Single range calibration Normally the complete calibration procedure should be performed to ensure that the entire instrument is p
11. 0 2 1000V 800 to 1100 2 to 42 800 to 1100 2 to 2 0 9E 6 to 1 1E 6 1E 8 to 1E 8 0 9E 6 to 1 1E 6 1E 8 to 1E 8 1OpA 9E 6 to 11E 6 E 7 to 1E 7 9E 6 to 11E 6 E 7 to 1E 7 100uA 90 6 110 6 1E 6 to 1E 6 90E 6 to 110E 6 1E 6 to 1E 6 0 9 3 to 1 1E 3 1 5 to 1 5 0 9E 3 to 1 1E 3 1E 5 to 1E 5 20mA 18 3 to 22E 3 E 4 to 1E 4 18E 3 to 22E 3 1E 4 to 1E 4 100mA 90 3 to 110E 3 1E 3 to 1E 3 90E 3 to 110E 3 1E 3 to 1E 3 0 9 to 1 1 E 2 to 1E 2 40 9 to 1 1 E22 to 1E 2 Note Actual allowable parameter ranges are 50 of full range for zero parameters 75 of full scale to 15096 of full scale for full range parameters but ranges listed above should be observed for optimum calibration B 10 Command Reference DATA CALibration PRO Tected SEN Se D ATA CALibration PRO Tected SO U Rce D ATA Purpose To request the calibration constants for the active range Format cal prot sens data cal prot sour data Response Four comma separated ASCII floating point constants Description The CAL PROT SENS DATA and CAL PROT SOUR DATA queries request the calibration constants for the active range of the sense and source functions respectively The four returned constants are in ASCII floating point format delimited by commas Note To request the appropriate constants 1 select the source or sense function 2 choose t
12. IC CMOS ANAL SWITCH DG444DY IC 866 400 406 652 U202 650 203 OP AMP LT1112 IC 1048 U204 229 IC 8 CHAN ANA MULTI IC 844 PLEXER DG408DY 6 9 6 10 Replaceable Parts Table 6 1 cont Analog board parts list Circuit designation Description Keithley part no U205 407 IC HEX INVERTERS 74HC400 IC 880 U209 215 IC QUAD COMPARATOR LM339D IC 774 U210 220 IC DUAL BIPOLAR OP AMP LT1124CS8 IC 955 U211 213 IC BIFET OP AMP AD712JR IC 834 U221 227 IC DIFF AMP AMP03GP IC 988 U222 IC OP AMP LTC1050CS8 IC 791 U223 409 237 IC MOSFET DRIVER TLP591B IC 877 U226 659 IC 20V OP AMP LT1097S8 IC 767 U231 219 235 234 IC OP AMP LOW POWER AD795JR IC 1052 262 232 U238 IC CMOS ANA SWITCH SPST IC 909 MAX326CSE U239 IC QUAD 2 INPUT NAND 74HC00M IC 781 U240 IC POS NAND GATES INVERT 74HCT14 656 U242 247 IC DUAL HIGH CMR SPEED IC 588 OPTO HCPL 2631 U252 256 IC 8 STAGE SHIFT CD74HC4094M IC 1026 U257 IC SUPPLY VOLT SUPERVISOR TL7705A 860 U263 228 IC OP AMP LOW NOISE LT1007CS8 IC 949 U265 IC PHOTO TRANS TLP626BV LFI IC 1006 U408 218 216 225 ICM DUAL J FET OP AMP OP 282GS IC 968 U500 IC OP AMP AD847JN IC 890 0501 IC VOLT COMPARATOR LM393D IC 775 U502 PROGRAMMABLE TEMP CONTROLLER IC 1062 U600 264 206 207 IC DUAL PICOAMP OP AMP AD706JR IC 910 208 233 U601 IC QUAD D FLIP FLOP W CLK RESET 74HC175 IC 923 U604 IC NCHAN LAT DMOS QUADFET IC 893 SD5400CY U605 INTE
13. This section explains how to handle clean and disassemble the Model 2410 Disassembly drawings are located at the end of this section Handling and cleaning To avoid contaminating PC board traces with body oil or other foreign matter avoid touching the PC board traces while you are repairing the instrument Motherboard areas covered by the shield have high impedance devices or sensitive circuitry where contamination could cause degraded performance Handling PC boards Observe the following precautions when handling PC boards Wear 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 nitrogen gas to clean dust off PC boards Solder repairs Observe the following precautions when you must solder a circuit board Use an OA based organic activated flux and take care not to spread the flux to other areas of the circuit board Remove the flux from the work area when you have finished the repair by using pure water with clean foam tipped swabs or a clean soft brush Once you have removed the flux swab only the repair area with methanol then blow dry the board with dry nitrogen gas After cleaning allow the board to dry in a 50 low humidity environment for several hours Disassembly 5 3 Static sensitive devices CMOS devices operate at very high i
14. software non rechargeable batteries damage from battery leakage or problems arising from normal wear or failure to follow instructions THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IM PLIED INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FIT NESS FOR A PARTICULAR USE THE REMEDIES PROVIDED HEREIN ARE BUYER S SOLE AND EXCLUSIVE REMEDIES NEITHER KEITHLEY INSTRUMENTS INC NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUEN TIAL DAMAGES ARISING OUT OF THE USE OF ITS INSTRUMENTS AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS INC HAS BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF SUCH DAMAGES SUCH EXCLUDED DAMAGES SHALL INCLUDE BUT ARE NOT LIMITED TO COSTS OF REMOVAL AND INSTALLATION LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PERSON OR DAMAGE TO PROP ERTY Model 2410 1100V SourceM eter Service M anual 1997 Keithley Instruments Inc All rights reserved Cleveland Ohio U S A Second Printing July 1998 Document Number 2410 902 01 Rev B Worldwide Addresses Keithley Instruments Inc 28775 Aurora Road Cleveland OH 44139 440 248 0400 Fax 440 248 6168 http www keithley com CHINA Keithley Instruments China Yuan Chen Xin Building Room 705 12 Yumin Road Dewai Madian Beijing 100029 8610 62022886 Fax 8610 62022892 FRANCE Keithley Instruments SARL BP 60 3 All e des Garays 91122 Palaiseau C dex 33 1 60 11 51 55 Fax 33 1
15. 5VAC for the filaments These VFD voltages are sup plied by U625 which is located on the digital board The front panel keys S901 S931 are organized into a row column matrix to minimize the number of microcontroller peripheral lines required to read the keyboard A key is read by strob ing the columns and reading all rows for each strobed column Key down data is interpreted by the display microcontroller and sent back to the main microprocessor using proprietary encod ing schemes Troubleshooting Troubleshooting 4 13 Troubleshooting information for the various circuits is summarized below See the compo nent layout drawings at the end of Section 6 for test point locations Display board checks If the front panel display tests indicate that there is a problem on the display board use Table 4 1 See principles of operation for display circuit theory Required condition Remarks Table 4 1 Display board checks Step Item component 1 Front panel test 2 P1005 pin 5 3 005 pin 9 4 U902 pin 1 5 0902 pin 43 6 U902 pin 32 7 10902 pin 33 Verify that all segments operate 5V 5 37V 5 Goes low briefly on power up then goes high 4MHz square wave Pulse train every 1ms 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
16. 60 11 77 26 GERMANY K eithley Instruments GmbH Landsberger Strasse 65 D 82110 Germering Munich 49 89 8493070 Fax 49 89 84930759 GREAT BRITAIN Keithley Instruments Ltd The Minster 58 Portman Road Reading Berkshire England RG3 1EA 44 1189 596469 Fax 44 1189 575666 ITALY Keithley Instruments SRL Viale S Gimignano 38 20146 Milano 39 2 48303008 Fax 39 2 48302274 NETHERLANDS Keithley Instruments BV Avelingen West 49 4202 MS Gorinchem 31 0 183 635333 Fax 31 0 183 630821 SWITZERLAND K eithley Instruments SA Kriesbachstrasse 4 8600 D bendorf 41 1 8219444 Fax 41 1 8203081 TAIWAN K eithley Instruments Taiwan 1FL 85 Po Ai Street Hsinchu Taiwan 886 3 572 9077 Fax 886 3 572 9031 Manual Print History The print history shown below lists the printing dates of all Revisions and Addenda created for this manual The Revision Level letter increases alphabetically as the manual undergoes sub sequent updates Addenda which are released between Revisions contain important change in formation that the user should incorporate immediately into the manual Addenda are numbered 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 revised copy of this print history page Revision A Document Number 2410 902 01 s Februar
17. C4 10 CAP 15P 1 100V CERAMIC C 512 15P C5 CAP 1UF 20 100V CERAMIC C 436 1 C15 38 61 47 CAP 47 5 100V CERAMIC C 465 47P C19 85 41 69 70 71 73 24 CAP 1UF 10 25V CERAMIC C 495 1 C28 60 CAP 47P 5 100V CERAMIC C 465 47P C31 CAP 100PF 596 100V CERAMIC C 465 100P C32 34 63 64 CAP 47UF 20 100V ALUM ELEC C 521 47 C33 35 52 55 CAP 22UF 2096 25V TANTALUM C 440 22 C36 50 39 44 46 49 59 CAP 1UF 1096 25V CERAMIC C 495 1 66 68 79 81 48 83 C42 43 97 99 101 102 104 1UF 20 50V CERAMIC C 418 1 C57 58 1000PF 10 50V MONO CERAMIC 452 1000 C62 91 CAP 10UF 20 25V TANTALUM C 440 10 C65 CAP 022UF 10 50V CERAMIC C 491 022 C72 86 CAP 1UF 20 50 CERAMIC C 519 1 C74 75 CAP 470UF 2096 25V ALUM ELEC C 413 470 C84 6 7 9 18 90 CAP 1UF 1096 25V CERAMIC C 495 1 C87 88 CAP 01UF 10 50 CERAMIC C 491 01 C96 100 103 105 CAP 1UF 20 50V CERAMIC C 418 1 C106 107 CAP 1UF 20 100V CERAMIC C 487 1 CR1 4 ULTRAFAST POWER RECTIFIER RF 107 CR6 9 12 20 ULTRAFAST POWER RECTIFIER RF 105 CRS 11 17 21 25 28 31 19 DIODE SWITCHING 250MA BAV103 RF 89 CR13 DIODE DUAL 5 2822 31 RF 95 CR14 15 22 24 5 32 33 DIODE DUAL SWITCHING BAV99L RF 82 CR29 30 34 39 DIODE SWITCHING MMBD914 RF 83 Fl POLYSWITCH SMD030 2 FU 103 HS1 2 3 HEAT SINK HS 33 IC POS VOLTAGE REG 15V 500 78M15 CONN RIGHT ANGLE 24PIN CS 5
18. EDIT and RANGE keys to select source range Multimeter reading used in corresponding calibration step See procedure Calibration 2 15 Step 4 Enter calibration dates and save calibration NOTE For temporary calibration without saving new calibration constants proceed to Step 5 Lock out calibration From normal display press MENU Select CAL and then press ENTER The Model 2410 will display the following CALIBRATION UNLOCK EXECUTE VIEW D ATES gt SAVE LO CK CHANGE PASSWORD 3 Select SAVE and then press ENTER The instrument will display the following mes sage SAVE CAL Press ENTER to continue EXIT to abort calibration sequence 4 Press ENTER The unit will prompt you for the calibration date CAL DATE 12 15 96 Use 44 p A V ENTER or EXIT 5 Change the displayed date to today s date and then press the ENTER key Press ENTER again to confirm the date 6 Theunit will then prompt for the calibration due date NEXT CAL 12 15 97 Use 4 p A V ENTER or EXIT 7 Setthe calibration due date to the desired value and then press ENTER Press ENTER again to confirm the date 8 Oncethecalibration dates are entered calibration is complete and the following message will be displayed CALIBRATION COMPLETE Press ENTER to confirm EXIT to abort 9 Press ENTER to save the calibration data or press EXIT to abort without saving cali bration data The following message will be displayed CALIBRATION SU C
19. Query calibration year month day NDUE lt y gt lt m gt lt d gt Program calibration due year month day NDUE Query calibration due year month day SENSe lt nrf gt Calibrate active measure range See Table 2 6 parameters DATA Query measurement cal constants for active range SOURce lt nrf gt Calibrate active source range See Table 2 7 parameters DATA Query source cal constants for active range Calibration data will not be saved if 1 Calibration was not unlocked with CODE command 2 Invalid data exists For example cal step failed or was aborted 3 Incomplete number of cal steps were performed For example omitting a negative full scale step Ranges that successfully calibrated will be saved if calibration is unlocked Ranges that failed will not be saved Recommended calibration parameters The maximum calibration command parameter ranges are 7596 to 15096 of full scale for positive and negative full scale calibration points zero cal ibration steps have 50 of full scale for valid entry ranges However for optimum calibration use calibration points within the ranges listed in Table 2 6 and Table 2 7 Note that each sense range requires three parameters zero negative full scale and positive full scale Similarly each source range requires four parameters two zero parameters a positive full scale parame ter and a negative full scale parameter Table 2 6 Recommended CALibrat
20. The test involves setting the source voltage to full range values as measured by a precision digital multimeter and then verifying that the Model 2410 voltage readings are with in required limits Performance Verification 1 13 1 With the power off connect the digital multimeter to the Model 2410 INPUT OUTPUT jacks as shown in Figure 1 1 2 Select the multimeter DC volts function 3 Setthe voltage source protection to gt 1100V To do so press CONFIG then SOURCE V to access the CONFIGURE V SOURCE menu then select PROTECTION and set the voltage source protection limit to gt 1100V 4 Setthe Model 2410 to both source and measure voltage by pressing the SOURCE V and MEAS V keys and make sure the source output is turned on 5 Verify output voltage accuracy for each of the voltages listed in Table 1 3 For each test point Select the correct source range Setthe Model 2410 output voltage to the indicated value as measured by the digital multimeter Verify that the Model 2410 voltage reading is within the limits given in the table NOTE It may not be possible to set the voltage source to the specified value Use the closest possible setting and modify reading limits accordingly 6 Repeat the procedure for negative source voltages with the same magnitudes as those listed in Table 1 3 7 Repeat the entire procedure using the rear panel INPUT OUTPUT jacks Be sure to select the rear panel jacks with the
21. and set the voltage source protection limit to 21100V 4 Press the Model 2410 SOURCE V key to source voltage and make sure the source out put is turned on 5 Verify output voltage accuracy for each of the voltages listed in Table 1 2 For each test point Select the correct source range Setthe Model 2410 output voltage to the indicated value Verify that the multimeter reading is within the limits given in the table 6 Repeat the procedure for negative output voltages with the same magnitude as those listed in Table 1 2 7 Repeat the entire procedure using the rear panel INPUT OUTPUT jacks Be sure to select the rear panel jacks with the front panel TERMINALS key Table 1 2 Output voltage accuracy limits Model 2410 Model 2410 Output voltage limits source range output voltage setting 1 year 18 28 200mV 200 000mV 199 360 to 200 640mV 2V 2 00000V 1 99900 to 2 00100V 20V 20 0000V 19 9936 to 20 0064V 1000V 975 00V 974 705 to 975 295V 1 12 Performance Verification Figure 1 1 Connections for voltage verification tests 09 0090000 Model 2410 Input HI Input LO Digital Multimeter Voltage measurement accuracy Follow the steps below to verify that the Model 2410 voltage measurement accuracy is within specified limits
22. are cascoded with output MOSFETs 0516 and 0523 other MOSFETS and transistors are slaves and the voltages across these devices are determined by the resistor capacitor ladder circuits shown Coarse current limits are built into the output stage Figure 4 4 1200V Output stage J simplified 0500 d i 0502 Hi Drive Q504 Q505 4 Ko 442v H Q514 H 15VF 1 Q516 Q518 Maindrive B z 300K 3 wi a I 30VF AM Hi Drive 0509 Q533 H Q511 H 1200V 4 10 Troubleshooting A D converter The SourceMeter unit uses a multi slope charge balance A D converter with a single slope charge balance run down The converter is controlled by gate array U610 Commands are issued by the MPU on the digital board through communications opto isolators to U610 and U610 sends A D reading data back through opto isolators to the digital board for calibration and processing Active guard The Model 2410 has an active guard or six wire ohms circuit used to measure complex devices This circuitry provides a low current 50mA equivalent of the voltage on output HI If the unit is in the SV mode the low current equivalent of the source voltage will appear on the guard terminal If the unit is in the SI mode the voltage on output HI is equal to the source cur rent multiplied by the external resistance value An equivalent voltage wil
23. are described in the manual The procedures explicitly state if the operator may perform them Otherwise they should be performed only by ser vice personnel Service personnel are trained to work on live circuits and perform safe installations and repairs of products Only properly trained service personnel may perform installation and service procedures Exercise extreme caution when a shock hazard is present Lethal voltage may be present on cable connector jacks or test fixtures The American National Standards Institute ANSI states that a shock hazard 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 any unknown circuit before measuring Users of this product must be protected from electric shock at all times The responsible body must ensure that users are prevented access and or insulated from every connection point In some cases connections must be exposed to potential human contact Product users in these circumstances must be trained to protect themselves from the risk of electric shock If the circuit is capable of operating at or above 1000 volts no conductive part of the circuit may be exposed As described in the International Electrotechnical Commission IEC Standard IEC 664 digital multimeter measuring circuits e g Keithley Models 175A 199 2000 2001 2002 and 2010 measuring circuits are In stallation Category II
24. data sent to main processor 4 14 Troubleshooting Power supply checks Power supply problems can be checked out using Table 4 2 See principles of operation for circuit theory on the power supply Table 4 2 Power supply checks Step Item component Required condition Remarks 1 Line fuse Check continuity Remove to check 2 Line power Plugged into live recepta Check for correct power up cle power on sequence 3 CR500 cathode 1200V 10 Referenced to TP501 4 CR503 anode 1200V 10 Referenced to TP501 5 504 cathode 42V 10 Referenced to TP501 6 CR505 anode 42V 10 Referenced to TP501 7 TP506 4 70V 10 70 referenced to TP500 8 507 15V 5 15VF referenced to TP500 9 508 15V 10 15VF referenced to TP500 10 TP509 70V 10 70VF referenced to TP500 11 TP510 45V 5 5 referenced to TP500 Digital circuitry checks Troubleshooting 4 15 Digital circuit problems can be checked out using Table 4 3 See principles of operation for a digital circuit description Table 4 3 Digital circuitry checks Step Item component Required condition Remarks 1 Power on test 2 U3 pin 19 3 03 pin 7 4 U3 pin 68 5 U3 lines A0 A19 6 03 lines DO D15 7 03 pin 66 W23 8 U4 pin7 9 U4 pin 8 10 U13 pins 34 42 11 U13 pins 26 31 12 UI3 pin 24 13 U13 pin 25 14 U3 pin 43 15 U3 pin
25. front panel TERMINALS key Table 1 3 Voltage measurement accuracy limits Model 2410 voltage Model 2410 source reading limits and measure range Source voltage 1 year 18 C 28 C 200mV 200 000mV 199 676 to 200 324mV 2V 2 00000V 1 99946 to 2 00054V 20V 20 0000V 19 9960 to 20 0040V 1000V 975 00V 974 80 to 975 20V Measure range coupled to source range when simultaneously sourcing and measur ing voltage As measured by precision digital multimeter Use closest possible value and mod ify reading limits accordingly if necessary 1 14 Performance Verification O utput current accuracy Follow the steps below to verify that Model 2410 output current accuracy is within specified limits The test involves setting the output current to each full range value and measuring the currents with a precision digital multimeter 1 With the power off connect the digital multimeter to the Model 2410 INPUT OUTPUT jacks as shown in Figure 1 2 2 Select the multimeter DC current measuring function 3 Pressthe Model 2410 SOURCE I key to source current and make sure the source output is turned on 4 Verifyoutputcurrentaccuracy foreach of the currents listed in Table 1 4 Foreachtest point Select the correct source range Setthe Model 2410 output current to the correct value Verify that the multimeter reading is within the limits given in the table 5 Repeat the procedure for negative output curre
26. guide pins then remove the board During re assembly replace the board and start the IEEE 488 digital I O and RS 232 connector nuts and the mounting screw Tighten all the fasteners once they are all in place and the board is correctly aligned 5 8 Disassembly Front panel disassembly Use the following steps to remove the display board and or the pushbutton switch pad 1 Unplug the display board ribbon cable Remove the front panel assembly This assembly has four retaining clips that snap onto the chassis over four pem nut studs Two retaining clips are located on each side of the front panel Pull the retaining clips outward and at the same time pull the front panel assembly forward until it separates from the chassis 3 Using thin bladed screw driver pry the plastic PC board stop located at the bottom of the display board until the bar separates from the casing Pull the display board from the front panel 4 Remove the switch pad by pulling it from the front panel Disassembly 5 9 Removing power components The following procedures to remove the power supply and or power module require that the case cover and motherboard be removed as previously explained Power supply removal Perform the following steps to remove the power supply 1 Remove the analog board 2 Unplug the two cables coming from the digital board 3 Remove the four screws that secure the power supply to the bottom of the chassis 4 R
27. have been calculated using only the Model 2410 one year accuracy specifications and they do not include test equipment uncertainty If a par ticular measurement falls outside the allowable range recalculate new limits based both on Model 2410 specifications and corresponding test equipment specifications Example limits calculation As an example of how verification limits are calculated assume you are testing the 20V DC output range using a 20V output value Using the Model 2410 one year accuracy specification for 20V DC output of 0 02 of output 2 4mV offset the calculated output limits are Output limits 20V 20V x 0 0296 2 4mV Output limits 20V 0 004 0 0024 Output limits 20V 0 0064V Output limits 19 9936V to 20 0064V Resistance limits calculation When verifying the ohms function it will probably be necessary to recalculate resistance lim its based on the actual calibrator resistance values You can calculate resistance reading limits in the same manner described above Be sure to use the actual calibrator resistance values and the Model 2410 normal accuracy specifications for your calculations As an example assume that you are testing the 20kO range and that the actual value of the nominal 19kQ calibrator resistor is 19 025kQ Using the Model 2410 one year normal accuracy specifications of 0 07196 of reading 60 the recalculated reading limits are Reading limits 19 025kQ 19 025kQ x 0 0
28. limits accordingly Select the appropriate ohms measurement range with the RANGE keys Verify that the Model 2410 resistance reading is within the limits given in the table 6 Repeatthe 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 1 18 Performance Verification Table 1 6 Ohms measurement accuracy limits Model 2410 resistance Model 2410 Calibrator reading limits range resistance 1 year 18 C 28 C 200 190 18 9739 to 19 02619 2000 1900 189 719 to 190 2810 2kQ 1 9kQ 1 89798 to 1 90202kQ 20kQ 19kQ 18 9805 to 19 0195 200kQ 190kQ 189 801 to 190 199kQ 2MQ 1 9MQ 1 89722 to 1 90278MQ 20MQ 19MQ 18 9758 to 19 0242MQ 200MQ 100MQ 99 32 to 100 679MQ Nominal resistance value Reading limits based on Model 2410 normal accuracy specifica tions and nominal resistance values If actual resistance values differ from nominal values shown recalculate reading limits using actual calibrator resistance values and Model 2410 normal accuracy specifications See verification limits earlier in this sec tion for details Figure 1 3 Connections for resistance accuracy verification Model 2410 O utput HI EI Eb Er amp llanu oooooono oo El y EY EI Resistance Calibrator Output LO Calibration 2 2 Ca
29. screws have been removed carefully lift the analog board assembly free of the main chassis Disassemble analog board assembly Remove the screws that secure the analog board and heat sink to the analog board subchassis e Carefully remove the heat sink by sliding the clips off the power transistors CAUTION Becareful not to damage the heat sink insulation layer NOTE Remove the analog board from the subchassis Remove the four screws that secure the bottom cover and then remove the cover from the bottom of the PC board When re installing the heat sink make sure all clips are properly installed and cen tered on each pair of output transistors Disassembly 5 7 Digital board removal Perform the following steps to remove the digital board This procedure assumes that the analog board assembly is already removed 1 Remove the IEEE 488 digital I O and RS 232 fasteners The IEEE 488 digital I O and RS 232 connectors each have two nuts that secure the connectors to the rear panel Remove these nuts 2 Remove the POWER switch rod At the switch place the edge of a flat blade screwdriver in the notch on the pushrod Gently twist the screwdriver while pulling the rod from the shaft 3 Unplug cables Unplug the display board ribbon cables Unplug the cables going to the power supply Unplug the rear panel power module cable 4 Remove digital board Slide the digital board forward until it is free of the
30. select the appropriate source function Press the EDIT key as required to select the source display field Note that the cursor will flash in the source field while its value is being edited 3 With the cursor in the source display field flashing set the source range to the lowest pos sible range for the value to be sourced using the up or down RANGE key For example you should use the 20V source range to output a 20V source value With a 20V source value and 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 adjustment and left and right arrow keys The numeric keys 5 Note that the source output value will be updated immediately You need not press ENTER when setting the source value Setting the measurement range When simultaneously sourcing and measuring either voltage or current the measure range is coupled to the source range and you cannot independently control the measure range Thus it is not necessary for you to set the range when testing voltage or current measurement accuracy Performance Verification 1 9 Compliance considerations Compliance limits When sourcing voltage you can set the SourceMeter to limit current from 1nA to 1 05A Conversely when sourcing current you can set the SourceMeter to limit voltage from 200UV to 1 1kV The SourceMeter output wil
31. select the multi meter DC volts function 2 Sendthe commands summarized in Table 2 8 in the order listed to initialize voltage cal ibration When the CAL PROT CODE command is sent the instrument will assume the operating states listed in Table 2 2 3 Perform the range calibration steps listed in Table 2 9 for each range For each range Send the SOUR VOLT RANG command to select the source and sense range being calibrated For example for the 2V range the following command would be sent SOUR VOLT RANG 2 Program the source to output the negative full range value using the SOUR VOLT command For example SO UR VOLT 2 NOTE Set the source to 975 for the 1000V range Note and record the multimeter reading Use the multimeter reading as the parameter for the CAL PROT SOUR and CAL PROT SENS commands For example a typical value for the 2V range would be CAL PROT SO UR 1 998 CAL PRO T SEN S 1 998 Program the voltage source for 0V output using the SOUR VOLT 0 0 command Note the multimeter reading Sendthe source and sense calibration commands using the multimeter reading for the parameter For example CAL PROT SOUR 1E 3 CAL PRO T SEN S 1E 3 Setthe source to the positive full range value using the SOUR VOLT command For example SO UR VOLT 2 NOTE Set the source to 975 for the 1000V range Note and record the multimeter reading Send the source and sense commands using the mul
32. setting to the present measurement range If the compliance setting is lower than the maximum possible reading on the present measurement range the compliance setting is the compliance limit If the compliance setting is higher than the measurement range the maximum reading on that measurement range is the compliance limit 1 10 Performance Verification Taking the SourceM eter out of compliance Verification measurements should not be made when the SourceMeter is in compliance For purposes of the verification tests the SourceMeter can be taken out of compliance by going into the edit mode and increasing the compliance limit NOTE Donottake the unit out of compliance by decreasing the source value or changing the range Always use the recommended range and source settings when perform ing the verification tests Performance Verification 1 11 O utput voltage accuracy Follow the steps below to verify that Model 2410 output voltage accuracy is within specified limits This test involves setting the 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 2410 INPUT OUTPUT jacks as shown in Figure 1 1 2 Selectthe multimeter DC volts measuring function 3 Setthe voltage source protection to gt 1100V To do so press CONFIG and then SOURCE V SOURCE menu to access the CONFIGURE V SOURCE menu Then select PROTECTION
33. support the troubleshooting tests and procedures covered in this section of the manual Refer to the following drawings Figure 4 1 Overall block diagram Figure 4 2 Analog circuitry block diagram Figure 4 3 Power supply block diagram Figure 4 4 Output stage simplified schematic Figure 4 5 Digital circuitry block diagram Overall block diagram Figure 4 1 shows an overall block diagram of the Model 2410 Circuitry is divided into three general areas Analog circuits includes circuits such as the DACs clamps output stage and feed back circuits as well as measurement circuits such as the A D converter Digital circuits includes the microcomputer that controls the analog section front panel and the GPIB and RS 232 ports as well as associated interfacing circuits Power supplies converts the AC line voltage into DC voltages that supply the power for the digital and analog circuits and the output stage Figure 4 1 Analog Section Overall eere BE einsam terree roges I block diagram l DACs Clamps Cube 1 O Output 1 1 l l l Feedback 1 1 I Guard O Guard 1 j AID Converter i i To Analog To To 2 1 ee A Saat ee eee 1 Circuits OutputStage Digital Circuits Denen ma De 1 70V 15V 45V 42V 1200V 45V 12V 1 1 Di
34. then read the status byte and error queue as outlined above to check for errors and to determine the exact nature of the error Command Reference B 13 Detecting calibration step completion When sending remote calibration commands you must wait until the instrument completes the present operation before sending another command You can use either OPC or OPC to help determine when each calibration step is completed Using the O PC query With the OPC operation complete query the instrument will place an ASCII 1 in the out put queue when it has completed each step To determine when the OPC response is ready per form the following 1 Repeatedly test the MAV Message Available bit bit 4 in the status byte and wait until it is set You can request the status byte by using the STB query 2 WhenMAV is set a message is available in the output queue and you can read the output queue and test for an ASCII 1 3 After reading the output queue repeatedly test MAV again until it clears At this point the calibration step is completed Using the O PC command The OPC operation complete command can 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 fol lowing 1 Enable operation complete by sending ESE 1 This command sets the OPC operation complete bit in the standard event enable register allowing operation complete stat
35. tion lock status Note To unlock calibration send the CODE command with the appropriate password Example CAL PROT LOCK Lock out calibration SAVE CALibration PRO Tected SAVE Purpose To save calibration 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 is non volatile memory and calibration constants will be retained indefinitely once saved Generally SAVE is sent after all other calibration steps except for LOCK Note Calibration will only be temporary unless the SAVE command is sent to per Example manently store calibration constants Calibration data will not be saved if 1 calibration was not unlocked by sending the CODE command 2 invalid data exists for example cal step failed or was aborted or 3 an incomplete number of cal steps were performed for example omitting a negative full scale step CAL PROT SAVE Save calibration constants Command Reference B 5 DATE CALibration PRO Tected D ATE Purpose To program the calibration date Format cal prot date year month day Parameters year 1996 to 2095 month 1 to 12 day 1 to 31 Query cal prot date Response year month day Description The DATE command allows you to store the calibration date in instrument EEROM for future reference You can read ba
36. to 2 800 to 1200 2 to 2 0 9E 6 to 1 1E 6 E 8 to 1E 8 0 9E 6 to 1 1E 6 1E 8 to 1E 8 10uA 9E 6 to 11E 6 E 7 to 1E 7 9E 6 to 11E 6 1E 7 to 1E 7 100uA 90E 6 to 110E 6 1E 6 to 1E 6 90E 6 to 110E 6 1E 6 to 1E 6 ImA 0 9E 3 to 1 1E 3 1E 5 to 1E 5 0 9E 3 to 1 1E 3 1E 5 to 1E 5 20mA 18E 3 to 22E 3 1E 4 to 1E 4 18E 3 to 22E 3 1E 4 to 1E 4 100mA 90E 3 to 110E 3 1E 3 to 1E 3 90E 3 to 110E 3 1E 3 to 1E 3 0 9 to 1 1 E 2 to 1E 2 10 9 to 41 1 E 2 to 1E 2 Note Parameter steps for each range may be performed in any order but all four parameter steps for each range must be completed For optimum calibration use parameters within recommended limits Remote calibration procedure Step 1 Prepare the Model 2410 for calibration 1 Connect the Model 2410 to the controller IEEE 488 interface or RS 232 port using a shielded interface cable 2 Turn the Model 2410 and the test equipment and allow them to warm up for at least one hour before performing calibration 3 If you using the IEEE 488 interface make sure the primary address of the Model 2410 is the same as the address specified in the program you will be using to send com mands Use the MENU key and the COMMUNICATION menu to access the IEEE 488 address Calibration 2 19 Step 2 Voltage calibration 1 Connect the Model 2410 to the digital multimeter see Figure 2 1 and
37. 0 Set output to OV 9 DMM reading Read actual output value 10 CAL PROT SOUR DMM Reading Calibrate sense function negative zero 11 Check 2410 for errors 12 CAL PROT SENS DMM Reading Calibration source function negative zero 13 Check 2410 for errors 14 SOUR VOLT Source value Establish positive full range polarity 15 Take DMM reading Read actual output value 16 CAL PROT SOUR DMM Reading Calibrate sense function positive full scale 17 Check 2410 for errors 18 CAL PROT SENS DMM Reading Calibrate source function positive full scale 19 Check 2410 for errors 20 SOUR VOLT 0 0 Set output to OV 2 Take DMM reading Read actual output value 22 CAL PROT SOUR DMM Reading Calibrate source positive zero 0 2 2 20 and 975 Perform complete procedure for each range where Range 0 2 2 20 and 1000 and Source value 2 DMM Reading parameter is the multimeter reading from previous step 3 Use SYST ERR query to check for errors Calibration 2 21 Step 3 Current calibration 1 Connect the Model 2410 to the digital multimeter see Figure 2 2 and select the multi meter DC current function Send the commands summarized in Table 2 10 in the order listed to initialize current calibration Calibrate each current range using the procedure summarized in Table 2 11 For each range Sendthe SOUR CURR RANG command to
38. 00V 20 000V 00 000V lt lt lt 4 1000V 975 00V 000 00V 975 00V 000 00V Use EDIT and RANGE keys to select source range Multimeter reading used in corresponding calibration step See procedure lt lt lt 4 2 12 Calibration Step 3 Current calibration Perform the following steps for each current range using Table 2 4 as a guide 1 10 11 12 13 Connect the Model 2410 to the digital multimeter as shown in Figure 2 2 Select the multimeter DC current measurement function From normal display press the SOURCE I key Press the EDIT key to select the source display field and then use the down RANGE key to select the 1uA source range From normal display press MENU Select CAL and then press ENTER The unit will display the following CALIBRATIO N UNLOCK EXECUTE VIEW D ATES gt SAVE LO CK CHANGE PASSWORD Select EXECUTE and then press ENTER The instrument will display the following message I CAL Press ENTER to Output 1 0000uA Press ENTER The Model 2410 will source 1uA and simultaneously display the following DMM RDG 1 000000UA Use 4 p A V ENTER or EXIT Note and record the DMM reading and then adjust the Model 2410 display to agree exactly with the actual DMM reading Use the up and down arrow keys to select the digit value and use the left and right arrow keys to choose the digit position or use the number keys 0 9 Note tha
39. 02410 COUNT Query number of times 2410 has been calibrated SAVE Save calibration data to EEPROM LOCK Lock calibration inhibit SAVE command operation LOCK Request cal lock status 0 unlocked 1 locked DATE lt y gt lt m gt lt d gt Program calibration year month day DATE Query calibration year month day NDUE lt y gt lt m gt lt d gt Program calibration due year month day NDUE Query calibration due year month day SENSe lt nrf gt Calibrate active measure range DATA Query measurement cal constants for active range SOURce lt nrf gt Calibrate active source range DATA Query measurement cal constants for active range Calibration data will not be saved if 1 Calibration was not unlocked with CODE command 2 Invalid data exists For example cal step failed or was aborted 3 Incomplete number of cal steps were performed For example omitting a negative full scale step Command Reference B 3 Miscellaneous commands Miscellaneous commands are those commands that perform such functions as saving calibra tion constants locking out calibration and programming date parameters CODE CALibration PRO Tected CO D E Purpose To unlock calibration so the calibration procedures can be performed Format cal prot code password Parameters Up to an 8 character string including letters and numbers Description The CODE command sends the password and enables calibrat
40. 05 210 225 CAP 1UF 1096 25V CERAMIC C 495 1 226 231 232 237 238 C204 404 608 609 CAP 01UF 10 50V CERAMIC C 491 01 550 553 C211 214 1000PF 10 50V MONO CERAMIC C 452 1000P C215 222 611 CAP 100PF 5 100V CERAMIC C 465 100P C223 224 227 230 CAP 33PF 5 100V CERAMIC C 465 33P 233 236 239 240 320 C241 CAP 1000PF 1 50V CERAMIC C 347 1000P C242 243 248 249 CAP 1UF 10 25V CERAMIC C 495 1 252 255 258 261 269 271 C244 245 CAP 01UF 10 200V CERAMIC C 472 01 C247 CAP 01 5 50V NPO C 514 01 C250 290 291 297 300 CAP 1UF 10 25V CERAMIC C 495 1 252 255 258 261 269 271 C256 257 340 341 CAP 22PF 10 100V CERAMIC C 451 22P C267 513 CAPACITOR SMT C 543 560P C273 282 284 289 1UF 10 25V CERAMIC C 495 1 305 310 321 322 600 602 C283 337 CAP 100P 10 100V CERAMIC C 451 100P C296 CAP 33PF 10 1000V CERAMIC C 64 33P C301 302 CAP 1000PF 10 50V MONO CERAMIC C 452 1000P C311 CAP 100UF 20 10V ALUM ELEC C 483 100 C312 319 10 5 100 372 10 C323 326 603 604 615 CAP 47P 5 100V CERAMIC C 465 47P C329 CAP 220PF 10 100V CERAMIC C 451 220P C331 334 CAP 100PF 5 100V CERAMIC C 465 100P C336 CAP 1000PF 10 1000V CERAMIC C 64 1000P C342 CAP 4 7PF 5 50V MONO CERAMIC C 452 4 7P C400 CAP 270PF 2 5 630V POLYPROPYLENE C 405 270P C401 CAPACITOR SMT C 544 270P C405 406 CAP 15UF 20 50V CERAMIC C 41
41. 07 J2 4 CONN BERG CS 339 J3 CONN RT ANGLE MALE 9 PIN CS 761 9 J5 CONN MICRODIN W GND FINGERS CS 792 J6 CONN D SUB MALE BOARDLOCK CS 848 9 TYPE J21 CONN MOLEX 3 PIN CS 772 3 K1 RELAY SURFACE MOUNT RL 188 Replaceable Parts 6 13 Table 6 2 cont Digital board parts list Circuit designation Description Keithly part no L1 FERRITE CHIP 600 OHM BLM32A07 CH 62 LS1 BEEPER 5V 30MA QMX 05 EM 6 P1001 CABLE ASSEMBLY CA 152 1 P1003 CABLE ASSEMBLY CA 32 9B P1004 1002 CABLE ASSEMBLY CA 62 4B Q1 6 TRANS N MOSFET VN0605T TG 243 Q7 8 POWER MOSFET IRFZ346 TG 313 Q10 TRANS NPN MMBT3904 TG 238 R1 37 RES 2 21K 1 100MW THICK FILM R 418 2 21K R2 13 4 52 14 19 34 35 50 RES 10K 1 100MW THICK FILM R 418 10K 58 63 68 62 75 R5 RES 10M 1 125MW THICK FILM R 418 10M R6 47 60 84 41 RES 10K 1 100MW THICK FILM R 418 10K R9 11 12 16 20 RES 100 5 250MW METAL FILM R 376 100 R10 RES 332 1 100MW THICK FILM R 418 332K R15 17 21 23 31 70 72 18 RES 1 100MW THICK FILM R 418 1K 64 59 48 61 8 R25 28 49 RES 4 75K 1 1OOMW THICK FILM R 418 4 75K R30 26 RES 100 1 1000MW THICK FILM R 418 100 R33 39 RES 0499 1 100MW THICK FILM R 418 0499 R38 RES 11K 1 100MW THICK FILM R 418 11K R40 32 27 24 RES 5 1K 5 125MW METAL FILM R 375 5 1K R43 44 45 65 RES 2 21K 1 100MW THICK FILM R 418 2 21K R51 RES 7 5K 1 125MW METAL FILM R 391 7 5K R53
42. 100MW THICK FILM R 418 100K 417 459 488 153 239 R340 343 361 362 365 RES 1 100MW THICK FILM R 418 1K 369 336 353 480 481 R341 342 RES 13K 1 100MW THICK FILM R 418 13K R346 370 294 RESISTOR R 461 2M R347 THICK FILM TF 261 R349 351 RES 33 2K 1 100MW THICK FILM R 418 33 2K 6 7 6 8 Replaceable Parts Table 6 1 cont Analog board parts list Circuit designation Description Keithley part no R358 RES 3 65 1 1000MW THICK FILM R 418 3 65K R363 THICK FILM TF 257 R367 424 425 426 603 RES 4 99K 1 1000MW THICK FILM R 418 4 99K 605 484 487 R368 321 212 RES 332 1 100MW THICK FILM R 418 332 R375 376 295 296 RES 10 10 100MW THICK FILM R 418 10 R377 378 RES 33 2K 1 125MW METAL FILM R 391 33 2K R379 387 391 392 308 RES 475 1 100MW THICK FILM R 418 475 R389 390 431 434 RES 1 100MW THICK FILM R 418 1K R393 399 411 412 413 RES 357 1 100MW THICK FILM R 418 357 R422 RES 4 7K 5 250MW METAL FILM R 376 4 7K R437 133 141 117 150 RESISTOR R 461 1M 354 R441 442 RES 3 01K 1 100MW THICK FILM R 418 3 01K R444 RES 20K 1 100MW THICK FILM R 418 20K R446 RES 10K 1 100MW THICK FILM R 418 10K R447 448 RES 11K 1 100MW THICK FILM R 418 11K R450 RES 2 0M 1 1 4W METAL FILM R 321 2M R451 RES 221K 1 1 10W METAL FILM R 263 221K R452 RES 20K 5 1 8W METAL FILM R 351 20K R453 RES 1 8K 1 1 10W METAL FILM
43. 24 Put 2410 3458A in remote PRINT 1 CLEAR Send DCL PRINT 1 OUTPUT 24 CLS Initialize 2410 PRINT 41 OUTPUT 24 ESE 1 SRE 32 Enable OPC and SRQ PRINT 1 OUTPUT 22 PRESET NORM Initialize 3458A PRINT 1 OUTPUT 22 NPLC 10 NDIG 7 TRIG LINE FUNC DCV AUTO CLS Clear CRT PRINT Model 2410 Calibration Program PRINT Connect DMM volts input to Model 2410 INPUT OUTPUT jacks GOSUB KeyCheck FOR J 1 TO 2 Select volts current cal IF J 1 THEN ESTORE VoltsInit ax 8 Range 2 Limit 1000 ELSE ESTORE CurrentInit ax 4 Range 000001 Limit 1 PRINT 1 OUTPUT 24 OUTP STAT OFF PRINT 1 OUTPUT 22 FUNC DCI AUTO PRINT Connect DMM current input to 2410 INPUT OUTPUT jacks GOSUB KeyCheck END IF Source Range FOR I 1 TO Max READ Cmd PRINT 1 OUTPUT 24 Cmd NEXT I WHILE Range lt Limit Cal all ranges IF J 1 THEN RESTORE VoltsCal ELSE RESTORE CurrentCal FOR I 1 TO 12 READ Cmd SELECT CASE I CASE 1 PRINT 1 OUTPUT 24 Cmd Range CASE 2 PRINT 1 OUTPUT 24 Cmd Source GOSUB ReadDMM Calibration Programs 02 CASE 3 4 6 7 9 10 12 PRINT 1 OUTPUT 24 Cmd Reading OPC GOSUB ErrCheck GOSUB CalEnd CASE 5 11 PRINT 1 O
44. 25 IC POS NAND GATES INVERT 74HCT14 IC 656 U24 IC TRIPLE 3 IN NAND 74F10 IC 659 VRI DIODE ZENER 33V IN4752A DZ 68 YI CRYSTAL FSM327 CR 41 Order current firmware revision for example A03 Replaceable Parts 6 15 Table 6 3 Display board parts list Circuit designation Description K eithley part no C901 CAP 22UF 20 6 3 TANTALUM C 417 22 C902 904 907 908 910 CAP 1UF 20 100V CERAMIC C 436 1 C903 905 906 909 911 CAP 1UF 20 50V CERAMIC C 418 1 C912 CAP 2 2UF 20 100V ALUM ELEC C 503 2 2 C913 914 100UF 20 16V TANTALUM C 504 100 C915 916 CAP 33PF 1096 100V CERAMIC C 451 33P CR901 904 DIODE SWITCHING 250MA BAV103 RF 89 CR905 906 DIODE SWITCHING MMBD914 RF 83 DS901 VACUUM FLUORESCENT DISPLAY DD 51C J1032 CONN BERG J1033 CONN HEADER STRAIGHT SOLDER CS 368 16 PIN 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 R 376 4 7K R905 RES 1M 5 125MW METAL FILM R 375 1M R906 RES 1K 5 250MW METAL FILM R 376 1K R907 RES 240 5 250MW METAL FILM R 376 240 R908 RES 10M 5 125MW METAL FILM R 375 10M T901 TRANSFORMER TDK ER14 5 SERIES TR 300 U901 904 905 IC LATCHED DRIVERS UCN 5812EPF 1 IC 732 U902 IC PROGRAMMED 7001 800 U903 IC 32 BIT SERIAL UCN5818EPF 1 IC 830 VR901 DIODE ZENER 8 2V MMBZ5237 DZ 92 Y901 CRYSTAL 4MHZ CR 36 4M
45. 44 16 U3 pin 45 17 U3 pin 47 RAM OK ROM OK Digital common 5V Low on power up then goes high Check for stuck bits Check for stuck bits 16 78MHz Pulse train during RS 232 VO Pulse train during RS 232 I O Pulse 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 signals referenced to digital common Digital logic supply MPU RESET line MPU address bus MPU data bus MPU clock RS 232 RX line RS 232 TX line IEEE 488 data bus IEEE 488 command lines IEEE 488 REN line IEEE 488 IFC line D ADDATA D DATA D CLK D STB 4 16 Troubleshooting Analog circuitry checks Table 4 4 summarizes analog circuitry checks Table 4 4 Analog circuitry checks Item Step component Required condition Remarks 1 TP200 gt 1100V voltage protection 13V 1V 2 TP201 SOURCE 10V 5V 5V 3 TP202 SOURCE 10V SVMD 10V 1V 4 TP203 SOURCE 10V 10 5V 1V 5 TP213 SOURCE 10V 1V 6 TP218 OUTPUT COM TV 7V 7 TP219 OUTPUT COM 7V 8 TP214 SVMI OUTPUT ON 20V 20V 5V 9 232 Bench defaults 6 4V 6V Measured with respect to FCOM TP500 Measured with respect to OCOM TP501 Troubleshooting 4 17 Battery replacement WARNING Disconnect the instrument
46. 54 RES 3 01K 1 1OOMW THICK FILM R 418 3 01K R55 RES 10M 1 125MW THICK FILM R 418 10M R56 RES 3 01K 1 1OOMW THICK FILM R 418 3 01K R57 RES 1M 1 100MW THICK FILM R 418 1M R73 74 76 78 81 RES 10K 1 100MW THICK FILM R 418 10K 83 7 69 71 85 89 R77 RES 15k 1 1000MW THICK FILM R 418 15K R82 RES 499 1 1000MW THICK FILM R 418 499 R91 92 RES 200 1 1000MW THICK FILM R 418 200 S01 2 SOCKET PLCC 032 T A SO 143 32 51 SWITCH PUSHBUTTON 6 POLE SW 466 TI TRANSFORMER FOR F SUPPLIES TR 302B TP3 CONN TEST POINT CS 553 U1 22 IC DUAL D TYPE F F 74HC74 IC 773 U2 IC MICROMANAGER DS12365 10 IC 884 U3 MICROCONTROLLER MC68332 FC LSI 161 U4 IC 5V RS 232 TRANSCEIVER MAX202 IC 952 05 OP AMP AD705JR IC 814 U6 IC OCTAL INTER BUS TRANS 75161 IC 647 6 14 Replaceable Parts Table 6 2 cont Digital board parts list Circuit designation Description K eithly part no 07 4 CHANNEL PWR DRIVER 2549B IC 1044 U8 IC NEG VOLTAGE REG 15V 500MA 79 15 U9 IC HEX INVERTERS 74HCT04 IC 880 011 VOLT COMPARATOR LM393D IC 775 U12 14 LARGE SCALE IC LSI 162 70 U13 IC GPIB ADAPTER 9914A LSI 123 U15 PROGRAMMED ROM 2400 803 U16 PROGRAMMED ROM 2400 804 U17 IC SERIAL EPROM 24LC16B LSI 153 U18 IC 5V VOLTAGE REGULATOR LM2940CT U19 IC SCHMITT TRIGGER NAND GATE IC 950 U20 IC OCTAL INTERFACE BUS 75160 IC 646 U21 IC DUAL POWER MOSFET DRIVER IC 437 TSC426 U23
47. 71 60 Reading limits 19 025kQ 19 50 Reading limits 19 0055kQ to 19 0445kQ 1 6 Performance Verification Restoring factory defaults Before performing the verification procedures restore the instrument to its factory front panel bench defaults as follows 1 Press the MENU key The instrument will display the following prompt MAIN MENU SAVESETUP COMMUNICATION CAL Select SAVESETUP and then press ENTER The unit displays SAVESETU P MENU GLOBAL SO U RCE M EM O RY Select GLOBAL and then press ENTER The unit then displays GLO BAL SETU P M ENU SAVE RESTORE POWERON RESET Select RESET and then press ENTER The unit displays RESET ORIGINAL DFLTS BENCH GPIB Select BENCH and then press ENTER The unit then displays RESETTING INSTRUMENT ENTER to confirm EXIT to abort Press ENTER to restore bench defaults and note the unit displays the following RESET COMPLETE BENCH defaults are now restored p gt lt q Press ENTER to continue Press ENTER and then EXIT as necessary to return to normal display Performance Verification 1 7 Performing the verification test procedures Test summary DC voltage output accuracy DC voltage measurement accuracy DC current output accuracy DC current measurement accuracy Resistance measurement accuracy If the Model 2410 is not within specifications and not under warranty see the calibration pro cedures in Section 2 for information on calibrating
48. 8 15 C407 CAP 1UF 20 35V TANTALUM C 494 1 C500 501 CAPACITOR C 548 033 C502 503 CAPACITOR C 549 047 C504 505 534 535 CAP 47UF 2096 100V ALUM ELEC C 521 47 C512 514 CAP 22PF 1096 100V CERAMIC C 451 22P C515 541 CAP 1UF 20 50V CERAMIC C 418 1 C522 523 526 544 CAPACITOR SMT C 542 1000P 527 529 547 532 533 C539 540 CAP 1UF 20 50V CERAMIC C 519 1 C545 546 CAP 022U 10 2000V C 550 022 C549 272 CAP 1UF 10 25V CERAMIC C 495 1 Table 6 1 cont Analog board parts list Replaceable Parts 219 Circuit designation Description Keithley part no C605 607 613 614 CAP 1UF 10 25V CERAMIC C 495 1 617 625 650 652 659 660 C610 612 CAP 2200P 10 100V CERAMIC C 430 2200P C616 CAP 22UF 2096 25V TANTALUM C 440 22 C661 662 524 554 555 CAP 1UF 1096 25V CERAMIC C 495 1 338 339 542 548 CR200 203 205 207 208 DIODE SWITCHING MMBD914 RF 83 210 216 221 235 CR206 209 230 233 400 DIODE IN3595 RF 43 401 222 214 215 CR223 DIODE IN3595 RF 43 CR224 225 504 507 ULTRAFAST POWER RECTIFIER RF 105 CR236 204 211 212 213 DIODE SWITCHING MMBD914 RF 83 513 522 602 CR237 238 512 DIODE DUAL SWITCHING BAV99L RF 82 CR500 503 523 RECTIFIER RF 116 CR508 511 520 521 DIODE CONTROLLED AVALANCHE RF 91 BYD17GSOD 87 CR514 515 516 RECTIFIER RF 125 CR517 519 RECTIFIER RF 117 CR600 DIODE DUAL HSM 2822T31 RF 95 CR601 524 DIODE SCHOTTKY S
49. 85 250V 250V 2 5A slow blow 5 x 20mm FU 106 2 5 Routine Maintenance 3 3 Figure 3 1 Rear panel WARNINGi no INT 5V PK V Q GUARI HI f MADE IN U S A tv V sv Z noo PEAK PEAK PEAK L GUARD SENSE lt 4 WIRE INPUT 250V SENSE OUTPUT PEAK IEEE 488 E ENTER IEEE ADDRESS WITH FRONT PANEL MENU TRIGGER LINK RS232 e LINE FUSE SLOWBLOW 2 5A 250V LINE RATING 85 250VAC 50 60HZ 210VA MAX INTERLOCK DIGITAL VO eta d Troubleshooting 4 2 Troubleshooting Introduction This section of the manual will assist you in troubleshooting and repairing the Model 2410 Included are self tests test procedures troubleshooting tables and circuit descriptions Note that disassembly instructions are located in Section 5 and component layout drawings are found at the end of Section 6 WARNING Theinformation in this section is intended for qualified service personnel only D o 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 U se caution when working with hazardous voltages Repair considerations Before making any repairs to the Model 2410 be sure to read the following considerations CAUTION boards are built using surface mount techniques and require spe cialized equipment
50. All other instruments signal terminals are Installation Category I and must not be con nected to mains Do not connect switching cards directly to unlimited power circuits They are intended to be used with imped ance limited sources NEVER connect switching cards directly to AC mains When connecting sources to switching cards install protective devices to limit fault current and voltage to the card Before operating an instrument make sure the line cord is connected to a properly grounded power receptacle Inspect the connecting cables test leads and jumpers for possible wear cracks or breaks before each use For maximum safety do not touch the product test cables or any other instruments while power is applied to the circuit under test ALWAYS remove power from the entire test system and discharge any capacitors before connecting or disconnecting cables or jumpers installing or removing switching cards or making internal changes such as installing or removing jumpers Do not touch any object that could provide a current path to the common side of the circuit under test or power line earth ground Always make measurements with dry hands while standing on a dry insulated surface ca pable of withstanding the voltage being measured Do not exceed the maximum signal levels of the instruments and accessories as defined in the specifications and operating information and as shown on the instrument or test fixture panels or switch
51. Arm Count 1 ARM COUNT 1 Trigger Arm Source Immediate ARM SOUR IMMediate Trigger Count 1 TRIG COUNT 1 Trigger Source Immediate TRIG SOUR IMMediate Calibration 2 7 Unlocking calibration by remote To unlock calibration via remote send the following command CAL PRO T CO DE password For example the following command uses the default password CAL PRO T CO DE KI002410 Changing the password The default password may be changed from the front panel or via remote as discussed below Changing the password from the front panel Follow the steps below to change the password from the front panel 1 4 5 Press the MENU key then choose CAL and press ENTER The instrument will display the following CALIBRATION UNLO CK EXECU TE VIEW DATES p gt SAVELOCK CHANGE PASSWORD Select UNLOCK and then enter the password Default 002410 Select CHANGE PASSWORD and then press ENTER The instrument will display the following New Pwd 002410 Use 4 gt A V ENTER or EXIT Using the range keys and the left and right arrow keys enter the new password on the display Once the desired password is displayed press the ENTER key to store the new password Changing the password by remote To change the calibration password by remote first send the present password and then send the new password For example the following command sequence changes the password from the KI002410 remo
52. CESS Press ENTER or EXIT to continue 10 Press ENTER or EXIT to complete process Step 5 Lock out calibration 1 From normal display press MENU 2 Select CAL and then press ENTER The Model 2410 will display the following CALIBRATION UNLOCK EXECUTE VIEW D ATES p gt SAVE LOCK CHANGE PASSWORD 3 Select LOCK and then press ENTER The instrument will display the following mes sage CALIBRATION LOCKED Press ENTER or EXIT to continue 4 Press ENTER or EXIT to return to normal display oe 2 16 Calibration Remote calibration Use the following procedure to perform remote calibration by sending SCPI commands over the IEEE 488 bus or RS 232 port The remote commands and appropriate parameters are sepa rately summarized for each step Remote calibration commands Table 2 5 summarizes remote calibration commands For a more complete description of these commands refer to Appendix B Table 2 5 Remote calibration command summary Command D escription CALibration Calibration subsystem PROTected Cal commands protected by password CODE lt password gt Unlock cal changes password if cal is already unlocked Default password KI002410 COUNT Query number of times 2410 has been calibrated SAVE Save calibration data to EEPROM LOCK Lock calibration inhibit SAVE command operation LOCK Request cal lock status DATE lt y gt lt m gt lt d gt Program calibration year month day DATE
53. D103C RF 113 J1001 CONN HEADER STRAIGHT SOLDER PIN CS 368 10 J1002 CONN HEADER STRAIGHT SOLDER CS 368 16 PIN J1003 CONNECTOR HEADER STRAIGHT SOLDER PIN CS 368 14 J1034 LATCHING HEADER FRICTON SGL CS 724 3 ROW J1035 CONN BERG CS 339 K200 201 202 203 204 RELAY SMT K205 N C RELAY 1 FORMB AQV214S RL 176 K206 RELAY REED HI VOLT ISOLATION 848 RL 152 1 K207 208 RELAY RL 199 L201 CHOKE SHIELD BEAD CH 52 L600 601 602 FERRITE CHIP 600 OHM BLM32A07 CH 62 L603 FERRITE CHIP 600 OHM BLM32A07 CH 62 Q200 207 240 241 232 TRANS N CHANNEL JFET SNJ132199 TG 294 Q208 210 212 214 216 TRANS NPN SILICON MPSH17 TG 221 218 Q209 211 213 215 217 TRANS CURRENT REGULATOR CR430 TG 219 6 5 6 6 Replaceable Parts Table 6 1 cont Analog board parts list Circuit designation Description Keithley part no Q220 225 TRANS NPN SILICON MJE340 TG 209 Q221 226 TRANS PNP POWER MJE350 TG 210 Q222 224 TRANS N CHAN JFET SST4393 TG 263 Q234 239 244 246 255 TRANS N MOSFET VN0605T TG 243 256 400 401 404 229 Q242 243 TRANS N CHAN MOSFET 2SK1412 TG 276 Q258 TRANSISTOR SMT TG 345 Q259 TRANSISTOR SMT TG 346 Q260 VERTICAL DMOS FET TG 301 Q261 TRANS N CHAN MOSFET TN2540N8 TG 274 Q402 409 TRANS N CHAN DMOS FET TN2504N8 261 Q403 406 407 408 TRANS N CHAN JFET SST109 TG 266 Q405 410 411 602 605 TRANS N MOSFET VN0605T TG 243 223 233 Q412 414 TRANS N MEGAFET RFD 14
54. GRATED CIRCUIT OPA177GS IC 690 U606 236 IC HI SPEED BIFET OP AMP AD711JR IC 894 U607 IC OP AMP NE5534D IC 802 U608 IC VOLT COMPARATOR LM311M IC 776 U609 PROGRAMMED IC 2400 801 U651 602 603 224 IC QUAD 2 IN NOR 74HCT02 IC 809 U660 661 IC 16 BIT DAC AD7849BR IC 1004 VR200 201 DIODE ZENER MM524694 DZ 113 VR214 215 504 505 506 DIODE ZENER 8 2V MMBZ5237 DZ 92 VR216 217 650 651 DIODE ZENER 17V MMBZ5247BL DZ 104 VR218 219 DIODE ZENER 30V BZX84C30 DZ 106 30 VR400 401 DIODE ZENER 4 7V IN4732A DZ 67 VR403 601 604 DIODE ZENER 3 3V MMBZ5226BL DZ 94 Table 6 1 cont Analog board parts list Replaceable Parts 6 11 Circuit designation Description Keithley part no VR404 406 202 203 DIODE ZENER 5 1V BZX84C5V1 DZ 88 VR500 501 DIODE ZENER 6 0V BZX84B6V2 DZ 87 VR502 503 DIODE ZENER 12V MMSZ12T1 DZ 112 VR507 DIODE ZENER 22V BZX84C22 DZ 86 VR508 509 DIODE ZENER 9 1V INA739A DZ 56 VR600 DIODE ZENER 6 4V IN4579 DZ 73 VR602 603 DIODE ZENER 6 2V MMSZ6V2 DZ 97 Y600 OSCILLATOR HIGH SPEED CMOS 12MHZ CR 37 Order current firmware revision for example A01 6 12 Replaceable Parts Table 6 2 Digital board parts list Circuit designation Description K eithly part no BTI BATTERY BA 46 Cl 3 77 11 14 16 17 20 22 CAP 1UF 10 25V CERAMIC C 495 1 23 25 26 30 40 C2 56 8 76 78 80 82 89 CAP 01UF 10 50V CERAMIC C 491 01
55. ICK FILM R 418 100K R548 RES 30 1K 1 1000MW THICK FILM R 418 30 1K R550 435 436 RES 499 1 1OOMW THICK FILM R 418 499 R555 RES 7 32K 1 125MW THIN FILM R 456 7 32K R556 RES 42 7K 1 125W THIN FILM R 456 42 7K R557 RES 17 2K 1 125W THIN FILM R 456 17 2K R559 RES 1 5K 1 100MW THICK FILM R 418 1 5K R568 574 575 RES 562K 1 125MW METAL FILM R 391 562K R600 449 RES 100K 1 100MW THICK FILM R 418 100K R602 607 558 RES 1 5K 1 100MW THICK FILM R 418 1 5K R609 RES NET TF 245 R610 RES 1 28M 1 1 5W METAL FILM R 176 1 28M R611 621 RES 475 1 100MW THICK FILM R 418 475 R612 RES 5 11K 1 100MW THICK FILM R 418 5 11K R613 624 659 660 RES 100 1 100MW THICK FILM R 418 100 518 519 R614 615 208 553 554 RES 2 21K 1 100MW THICK FILM R 418 2 21K R618 RES 34K 1 100MW THICK FILM R 418 34K R619 RES 4 75K 1 100MW THICK FILM R 418 4 75K R620 RES 82 5 1 100MW THICK FILM R 418 82 5 R623 154 155 RES 10 10 100MW THICK FILM R 418 10 R650 651 RES NET 9K 1K MICRO DIVIDER TF 246 2 R652 665 RES 357 1 100MW THICK FILM R 418 357 R656 RES 8 98K 1 125W THIN FILM R 456 8 98K R657 658 RES 1 100MW THICK FILM R 418 1M R666 RES 3K 12K 0 1 100MW THIN TF 237 2 FILM RT200 POLYSWITCH PTC RESISTOR RT 17 T500 TRANSFORMER TR 311A TP200 215 218 225 227 CONN TEST POINT CS 553 228 230 235 500 TP501 506 510 CONN TEST POINT CS 553 U201 212 214 230 241
56. INPUT 2 Data PRINT Data Range Range 10 IF Range 200 THEN Range 1000 LOOP WHILE Range 1000 PRINT 1 OUTPUT 24 CAL PROT LOCK PRINT 1 OUTPUT 24 SENS FUNC CURR DC PRINT 1 OUTPUT 24 SOUR FUNC CURR PRINT 1 OUTPUT 24 CAL PROT CODE KI002410 E Range 000001 Initial range luA PRINT PRI Model 2410 Current Calibration Constants PRINT DO Loop for all current ranges PRINT 1 OUTPUT 24 SOUR CURR RANGE Range PRINT 1 OUTPUT 24 CAL PROT SENS DATA PRINT 1 ENTER 24 LINE INPUT 2 Data C 8 Calibration Programs PRINT Data PRINT 1 OUTPUT 24 CAL PROT SOUR DATA PRINT 1 ENTER 24 LINE INPUT 2 Data PRINT Data Range Range 10 IF Range 009 AND Range 011 THEN Range 02 IF Range 19 AND Range 21 THEN Range 1 LOOP WHILE Range lt 1 PRINT 41 OUTPUT 24 CAL PROT LOCK Lock out calibration PRINT 41 OUTPUT 24 RST PRINT 41 LOCAL 24 CLOSE END Accuracy calculations A 2 Analog board removal 5 6 Analog circuitry checks 4 16 Assembly drawings Battery replacement 4 17 Calibration 2 1 Calibration considerations 2 4 Calibration equipmen Calibration programs Command reference B 1 Command summary B 2 Compliance considerationq 1 9 Component layout 6 3 Computer hardware requirements Curr
57. M R 418 80 6K R219 220 230 231 616 RES 49 9K 1 1000MW THICK FILM R 418 49 9K 482 221 483 373 374 R222 RES 66 5K 1 1000MW THICK FILM R 418 66 5K R224 234 237 244 247 RES 10K 1 100MW THICK FILM R 418 10K 281 282 284 286 225 R226 288 301 617 622 RES 10K 1 100MW THICK FILM R 418 10K 654 655 211 223 372 R227 RES 6 04K 1 1000MW THICK FILM R 418 6 04K R228 229 RES 2K 1 100MW THICK FILM R 418 2K R240 243 248 251 253 RES 4 99K 1 1000MW THICK FILM R 418 4 99K R241 242 249 250 653 RES 140K 1 100MW THICK FILM R 418 140K 664 R257 258 261 262 265 RES 4 99K 1 100MW THICK FILM R 418 4 99K 266 313 314 317 366 R268 271 209 RES 1 100MW THICK FILM R 418 1M R272 2773 RES 249K 1 100MW THICK FILM R 418 249K R280 439 440 RES 4 02 1 100MW THICK FILM R 418 4 02K R283 287 297 299 350 RES 30 1K 1 1000MW THICK FILM R 418 30 1K R289 291 RES 45 3K 1 100MW THICK FILM R 418 45 3K R293 RES 243K 1 125MW METAL FILM R 391 243K R298 300 RES 150K 1 100MW THICK FILM R 418 150K R302 RES 0499 1 100MW THICK FILM R 418 0499 R303 RES 3 01K 1 1000MW THICK FILM R 418 3 01K R304 306 RES 33 5 250mW METAL FILM R 376 33 R311 312 334 337 339 RES 4 99 1 1000MW THICK FILM R 418 4 99K 335 R320 RESISTOR R 461 10M R332 604 606 423 429 RES 499 1 1OOMW THICK FILM R 418 499 430 505 510 551 R338 364 402 404 416 RES 100K 1
58. N05LSM TG 267 Q413 TRANS P CHAN MOSFET TP0610T TG 259 Q415 TRANS P FET MTP23P06 TG 229 Q501 503 505 508 510 TRANS NPN MMBT3904 TG 238 512 513 227 257 Q504 TRANS NPN TIP48 TG 314 Q506 520 601 228 TRANS PNP MMBT3906L TG 244 262 263 Q507 TRANS PMBMJES731A TG 315 Q514 516 500 502 230 TRANS NCHANNEL PWR TG 222 FET MTPIN100 231 Q515 517 519 532 600 TRANS NPN MMBT3904 TG 238 Q518 TRANS NPN DARLINGTON TIP101 TG 230 0521 TRANS PNP DARLINGTON TIP106 TG 231 Q523 531 525 509 533 TRANS P CHANNEL FET MTP2P50 TG 208 511 Q526 527 TRANS N CHANNEL MOSFET SI9410DY TG 302 Q528 265 TRANS NPN SILICON BC846BL TG 278 Q529 264 TRANS PNP BC 856BL TG 287 R125 RESISTOR R 461 200K R149 RES 10K 5 250MW METAL FILM R 376 10K R151 152 536 537 RES 1 100MW THICK FILM R 418 1K 667 671 157 661 662 665 R156 RES 24 9K 1 100MW THICK FILM R 418 24 9K R200 201 203 232 238 RESISTOR NETWORK 10K 10K TF 236 R202 204 252 255 256 RES 100K 1 100MW THICK FILM R 418 100K 259 260 263 264 267 R207 RES 90 9K 1 125mW METAL FILM R 391 90 9K Table 6 1 cont Analog board parts list Replaceable Parts Circuit designation Description Keithley part no R210 RES 768 1 100MW THICK FILM R 418 768 R213 RES NET 5K 1 668A TF 243 5K R216 318 274 279 319 RES 20K 1 100MW THICK FILM R 418 20K 345 445 R217 RES 121K 1 100MW THICK FILM R 418 121K R218 RES 80 6K 1 100MW THICK FIL
59. R or EXIT Note and record the DMM reading and then adjust the display to agree with the DMM reading Once again the maximum adjustment is within 1 of the present range After adjusting the display to agree with the DMM reading press ENTER to complete calibration of the present range Press EXIT to return to normal display and then select the 10uA source range using the EDIT and up RANGE keys Repeat steps 2 through 18 for the 10uA range After calibrating the 10uA range repeat the entire procedure for the 100uA through 1A ranges using Table 2 4 as a guide Be sure to select the appropriate source range with the EDIT and up RANGE keys before calibrating each range Model 2410 Input LO Amps Digital Multimeter 2 14 Calibration Table 2 4 Front panel current calibration Source Source Multimeter current range current reading 1uA 1 0000uA HA 0 0000u A 1 0000uA uA 0 0000uA uA 10uA 10 000u A 00 000u A uA 10 000uA uA 00 000 100uA 100 00 000 00 100 00uA 000 00uA uA ImA 1 0000mA mA 0 0000mA mA 1 0000mA mA 0 0000mA mA 20mA 20 000 mA 00 000mA mA 20 000mA mA 00 000mA mA 100mA 100 00mA mA 000 00mA mA 100 00mA mA 000 00mA mA 1A 1 0000A A 0 0000A A 1 0000A A 0 0000A A Use
60. R 263 1 8K R454 455 RES 49 9 1 1 10W METAL FILM R 263 49 9 R467 471 RES 100 1 1 10W METAL FILM R 263 100 R472 478 466 355 290 RES 1 100MW THICK FILM R 418 1K 344 309 R473 RES 30 1K 1 100MW THICK FILM R 418 30 1K R474 477 RES 2 1 1W R 441 2 R479 501 529 530 RES 249 1 100MW THICK FILM R 418 249 534 563 R485 525 526 552 348 RES 0499 1 100MW THICK FILM R 418 0499 R489 356 359 418 421 RES 1 100MW THICK FILM R 418 1K 456 458 460 462 464 R490 RES 205 1 1 10W METAL FILM R 263 205 R500 508 521 527 528 RES 562K 1 125MW METAL FILM R 391 562K 533 535 549 566 567 R502 513 515 561 562 RES 562K 1 125MW METAL FILM R 391 562K 565 569 573 R503 512 514 532 560 RES 249 190 100MW THICK FILM R 418 249 R504 511RES 10K 1 100MW THICK FILM R506 RES 30 1 1 1 5W METAL FILM R 88 30 1 R507 RES 18 7 1 125mW METAL FILM R 391 18 7 R509 RES 18 7 196 125mW METAL FILM R 391 18 7 Table 6 1 cont Analog board parts list Replaceable Parts Circuit designation Description Keithley part no R516 523 RES 4 02K 1 100MW THICK FILM R 418 4 02K R517 539 541 RES 12 1 1 125MW METAL FILM R 391 12 1 R520 RES 301 1 100MW THICK FILM R 418 301 R524 538 RES 12 1 1 125MW METAL FILM R 391 12 1 R531 RES 301 1 100MW THICK FILM R 418 301 R542 543 RES 5 5 1W METAL R 444 5 R544 547 292 RES 100K 1 100MW TH
61. T SOUR command generates an in valid source offset calibration constant This error occurs when a CAL PROT SOUR command generates an in valid source gain calibration constant This error occurs when a CAL PROT SENS command generates an in valid measurement offset calibration constant This error occurs when a CAL PROT SENS command generates an in valid measurement gain calibration constant B 12 Command Reference Table B 4 Calibration errors Error Error message number 500 Date of calibration not set 501 Next date of calibration not set 502 Calibration data invalid 503 DAC calibration overflow 504 DAC calibration underflow 505 Source offset data invalid 506 Source gain data invalid 507 Measurement offset data invalid 508 Measurement gain data invalid Status byte EAV Error Available 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 and then test bit 2 to see if it is set If the bit is set an error has occurred and you can use the appropriate error query to read the error and at the same time clear the EAV bit in the status byte Generating an SRQ on error To program the instrument to generate an IEEE 488 bus SRQ Service Request when an error occurs send the SRE 4 command This command will enable SRQ when the EAV bit is set You can
62. Table 1 1 summarizes recommended verification equipment You can use alternate equipment as long as that equipment has specifications at least as good as those listed in Table 1 1 Keep in mind however that test equipment uncertainty will add to the uncertainty of each measurement Generally test equipment uncertainty should be at least four times better than corresponding Model 2410 specifications Table 1 1 lists the uncertainties of the recommended test equipment including the maximum allowable uncertainty of alternate test equipment shown in parentheses Table 1 1 Recommended verification equipment Manufacturer Description Model Accuracy Digital multimeter Hewlett Packard DC voltage IV 5 6ppm HP3458A 10V 4 3ppm 100V 6 3ppm 1000V 6 lppm DC current 55ppm 104 25ppm 100uA 23ppm 1mA 20ppm 100mA 35ppm 1A 110ppm Resistance calibrator Fluke 5450A Resistance 100 23ppm 340 1900 10 5ppm 370 1 9kO 8ppm 265ppm 19kO 7 5 250ppm 190kO 8 5ppm 260ppm 1 9MQ 11 5ppm 365ppm 19MQ 30ppm 315 100MQ 120ppm 1700ppm 90 day full scale accuracy specifications of ranges required for various measurement points 90 day specifications of nominal resistance values shown Maximum uncertainty of alternate test equipment is shown in parentheses Performance Verification 1 5 Verification limits The verification limits stated in this section
63. UTPUT 24 Cmd GOSUB ReadDMM CASE 8 PRINT 1 OUTPUT 24 Cmd Source GOSUB ReadDMM END SELECT NEXT I Range Range 10 Source Range IF J 1 AND Range 200 THEN Range 1000 Source 975 IF J 2 AND Range gt 009 AND Range lt 011 THEN Range 02 Source IF J 2 AND Range gt 19 AND Range lt 21 THEN Range 1 Source 1 WEND EXT J INE INPUT Enter calibration date yyyy mm dd D PRINT 41 OUTPUT 24 CAL PROT DATE D INE INPUT Enter calibration due date yyyy mm dd D PRINT 41 OUTPUT 24 CAL PROT NDUE D PRINT 1 OUTPUT 24 CAL PROT SAVE Save calibration constants GOSUB ErrCheck PRINT 41 OUTPUT 24 CAL PROT LOCK Lock out calibration PRINT Calibration completed PRINT 1 OUTPUT 24 RST PRINT 1 LOCAL 22 24 CLOSE END KeyCheck Check for key press routine WHILE 5 lt gt WEND Flush keyboard buffer PRINT PRINT Press any key to continue ESC to abort program DO I 5 LOOP WHILE I IF I CHR 27 THEN GOTO EndProg Abort if ESC is pressed RETURN Lu CalEnd Check for cal step completion DO PRINT 1 SRO Request SRO status INPUT 2 S Input SRQ status byte LOOP UNTIL S Wait for operation complete PRINT 41 OUTPUT 24 ESR Clear OPC PRINT 41 ENTER 24 INPUT 2 S PRINT 1 SPOLL 24 Clear SRQ INPUT 2 S URN C 5 C 6 Calibration Programs
64. ach calibration step minimizing the possibility that improper calibration may occur due to operator error Front panel error reporting If an error is detected during comprehensive calibration the instrument will display an appro priate error message see Appendix B The unit will then prompt you to repeat the calibration step that caused the error Remote error reporting You can detect errors while in remote by testing the state of EAV Error Available bit bit 2 in the status byte Use the STB query to request the status byte Query the instrument for the type of error by using the appropriate S YST ERR query The Model 2410 will respond with the error number and a text message describing the nature of the error See Appendix B for details Calibration 2 9 Front panel calibration The front panel calibration procedure described below calibrates all ranges of both the current and voltage source and measure functions Note that each range is separately calibrated by repeating the entire procedure for each range Step 1 Prepare the Model 2410 for calibration 1 Turnon the Model 2410 and the digital multimeter and allow them to warm up for at least one hour before performing calibration 2 Press the MENU key and then choose CAL and press ENTER Select UNLOCK and then press ENTER The instrument will display the following PASSWORD Use 4 p A Y ENTER or EXIT 3 Usethe up and down range keys to select the let
65. ading limits accordingly if necessary Performance Verification 1 17 Resistance measurement accuracy Follow the steps below to verify that Model 2410 resistance measurement accuracy is within specified limits This procedure involves applying accurate resistances from a resistance calibra tor and then verifying that Model 2410 resistance measurements are within required limits 1 With the power off connect the resistance calibrator to the Model 2410 INPUT OUT PUT and 4 WIRE SENSE jacks as shown in Figure 1 3 Be sure to use the four wire con nections as shown 2 Select the resistance calibrator external sense mode 3 Configure the Model 2410 ohms function for the 4 wire sense mode as follows Press CONFIG then MEAS Q The instrument will display the following CONFIG OHMS SOURCE SENSEMODE GUARD Select SENSE MODE and then press ENTER The following will be displayed SENSE MODE 2 WIRE 4 WIRE Select 4 WIRE and then press ENTER Press EXIT to return to normal display 4 Press MEAS Q to select the ohms measurement function and make sure the source out put is turned on 5 Verify ohms measurement accuracy for each of the resistance values listed in Table 1 6 For each measurement Setthe resistance calibrator output to the nominal resistance or closest available value NOTE It may not be possible to set the resistance calibrator to the specified value Use the closest possible setting and modify reading
66. al circuitry block diagram List of Tables l Performance Verification Recommended verification equipment Output voltage accuracy Voltage measurement accuracy limits iii Output current accuracy limits ass Current measurement accuracy limits esee Ohms measurement accuracy limits eese 2 Calibration Recommended calibration equipment Calibration unlocked states Front panel voltage calibration esee Front panel current calibration eene Remote calibration command summary Recommended CALibration PROTected SENSe parameter ranges Recommended CALibration PROTected SOURce 2 18 parameter ranges Voltage calibration initialization commands Voltage range calibration commands Current calibration initialization commands Current range calibration commands esee 3 Routine Maintenance Power line FUSE uu eee tu a 3 2 4 Troubleshooting Display board checks a Power supply Checks eere ett titre reote eitis Digital circuitry checks eese nere Analog circuitry
67. and skills for repair If you are not equipped and or qualified it is strongly recommended that you send the unit back to the fac tory for repairs or limit repairs to the PC board replacement level Without proper equipment and training you could damage a PC board beyond re pair 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 2410 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 2410 These static sensitive devices require special handling as explained in Section 5 When a circuit board is removed or a component is replaced the Model 2410 must be recalibrated See Section 2 for details on calibrating the unit Power on self test During the power on sequence the Model 2410 will perform a checksum test on its EPROM and test its RAM If one of these tests fail the instrument will lock up Troubleshooting 4 3 Front panel tests There are three front panel tests one to test the functionality of the front panel keys and two to test the display In the event of a test failure refer to Display board check
68. ase at the back 5 Removechassis To remove the case grasp the front bezel of the instrument and care fully slide the chassis forward Slide the chassis out of the metal case 5 6 Disassembly Analog board removal Perform the following steps to remove the analog board This procedure assumes that the case cover is already removed 1 Disconnect the front and rear input terminals You must disconnect these input terminal connections for both the front and rear inputs INPUT OUTPUT HI and LO 4 WIRE SENSE HI and LO V O GUARD and GUARD SENSE rear panel only Remove all the connections by pulling the wires off the pin connectors and then remove the ferrite noise filters from the chassis During reassembly use the following table to identify input terminals Terminal Front wire color Rear wire color INPUT OUTPUT HI Red White Red INPUT OUTPUT LO Black White Black 4 WIRE SENSE HI Yellow White Yellow 4 WIRE SENSELO Gray White Gray V GUARD White GUARD SENSE Blue White Unplug cables Carefully unplug the ribbon cables at J1001 J1002 and J1003 Unplug the ON OFF cable at J1034 Remove screws Remove the two fastening screws that secure the analog board assembly to the chas sis These 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 Remove analog board assembly After all
69. ational All ranges or functions are bad Q Checked all cables Display or output check one Drifts Unable to zero Unstable Q Overload Q Will not read applied input Q Calibration only I Certificate of calibration required O Data required attach any additional sheets as necessary Show a block diagram of your measurement including all instruments connected whether power is turned on or not Also describe signal source Where is the measurement being performed factory controlled laboratory out of doors etc What power line voltage is used Ambient temperature F Relative humidity Other Any additional information If special modifications have been made by the user please describe Be sure to include your name and phone number on this service form
70. board heat sink shield assembly 2410 050 Chassis assembly 2410 051 Chassis analog board assembly 2410 052 Final chassis assembly 2410 053 Disassembly 5 5 Case cover removal Follow the steps below to remove the case cover to gain access to internal parts WARNING Before removing the case cover disconnect the line cord and any test leads from the instrument 1 Remove handle handle serves as an adjustable tiltbail Adjust its position by gently pulling it away from the sides of the instrument case and swinging it up or down To remove the handle swing the handle below the bottom surface of the case and back until the orientation arrows on the handles line up with the orientation arrows on the mounting ears With the arrows lined up pull the ends of the handle away from the case 2 Removemountingears Remove the screw that secures each mounting ear Pull down and out on each mounting ear NOTE When re installing the mounting ears make sure to mount the right ear to the right side of the chassis and the left ear to the left side of the chassis Each ear is marked RIGHT or LEFT on its inside surface 3 Removerear bezel To remove the rear bezel loosen the two screws that secure the rear bezel to the chassis and then pull the bezel away from the case 4 Remove grounding screws Remove the two grounding screws that secure the case to the chassis They are located on the bottom of the c
71. by pressing the SOURCE I and MEAS I keys and make sure the source output is turned on 4 Verify measure current accuracy for each of the currents listed in Table 1 5 For each measurement Select the correct source range Setthe Model 2410 source output to the correct value as measured by the digital multimeter Verify that the Model 2410 current reading is within the limits given in the table NOTE not be possible to set the current source to the specified value Use the closest possible setting and modify reading limits accordingly 5 Repeat the procedure for negative calibrator currents with the same magnitudes as those listed in Table 1 5 6 Repeat the entire procedure using the rear panel INPUT OUTPUT jacks Be sure to select the rear panel jacks with the front panel TERMINALS key Table 1 5 Current measurement accuracy limits Model 2410 current Model 2410 source Source reading limits and measure range current 1 year 18 C 28 C 1 00000uA 0 99941 to 1 00059uA 10uA 10 0000uA 9 9966 to 10 0034uA 100uA 100 000uA 99 969 to 100 031uA 1 00000mA 0 99967 to 1 00033mA 20mA 20 0000mA 19 9918 to 20 0082mA 100mA 100 000mA 99 939 to 100 061mA 1 1 00000 0 99723 to 1 00277A Measure range coupled to source range when simultaneously sourcing and measuring current As measured by precision digital multimeter Use closest possible value and modify re
72. ck the date from the instrument by using the DATE query or by using the front panel CAL menu Note The year month and day parameters must be delimited by commas Example CAL PROT DATE 1996 11 20 Send cal date 11 20 96 NDUE CALibration PRO Tected N D U E Purpose To send the next calibration due date to the instrument Format cal prot ndue year month day Parameters year 1996 to 2095 month 1 to 12 day 1 to 31 Query cal prot ndue Response year month day Description The NDUE command allows you to store the date when calibration is next due in instrument memory You can read back the next due date by using the NDUE query or by using the front panel CAL menu Note The next due date parameters must be delimited by commas Example CAL PROT NDUE 1997 11 20 Send due date 11 20 97 B 6 Command Reference SEN Se CALibration PRO Tected SEN Se Purpose To calibrate the sense function Format cal prot sens lt nrf gt Parameters See Table B 2 for recommended parameter ranges for optimum calibration Description The CAL PROT SENS command calibrates the Model 2410 sense function To use this command you must 1 program the source to the correct value 2 select the range being calibrated and 3 send the CAL PROT SENS command for each parameter listed in Table B 2 Note When the Model 2410 receives this command it will attempt to place the Example
73. ctual reading range is 10V 2 5mV or from 9 9975 to 10 0025V Current measurement calculations are performed in exactly the same manner using the perti nent specifications ranges and input signal values Source accuracy Source accuracy is calculated similarly except of course that source specifications are used As an example of how to calculate the actual source output limits assume that you are sourcing 0 7mA on the mA source range You can compute the reading limit range from source current one year accuracy specifications as follows Accuracy 0 034 of output 200nA offset z 0 03496 x 0 7mA 200nA 238nA 200nA 438nA In this case the actual current output range is 0 7mA 438nA or from 0 69956mA to 0 70044mA Command Reference B 2 Command Reference Introduction This appendix contains detailed information on the various Model 2410 remote calibration commands calibration error messages and methods to detect the end of each calibration step Section 2 of this manual covers detailed calibration procedures Command summary Table B 1 summarizes Model 2410 calibration commands These commands are covered in detail in the following paragraphs Table B 1 Remote calibration command summary Command D escription CALibration Calibration subsystem PROTected Cal commands protected by password CODE lt password gt Unlock cal if cal is unlocked changes password Default password KI0
74. cuitry block diagram U15 U16 U12 U14 Serial Reset Interface RS 232 Interface U E PROM jis 4 Microprocessor GPIB U3 lt U6 U13 gt IEEE 488 Interface AID U20 Control D ata AJD Interface 09 025 4 LN To Display Board Controller lt 16 78MHz ne a Trigger f T gt Trigger U23 Digital 1 0 m Digital U7 1 0 4 12 Troubleshooting Display board U902 is the display microcontroller that controls the vacuum fluorescent display and interprets key data The microcontroller has four peripheral I O ports that are used for the various control and read functions Display data is serially transmitted to the microcontroller from the digital board via the TXB line to the microcontroller PDO terminal In a similar manner key data is serially sent back to the digital board through the RXB line via PD1 The 4MHz clock for the microcontroller is gen erated on the display board DS901 is the vacuum fluorescent display module which can display up to 49 charac ters Each character is organized as a 5 x 7 matrix of dots or pixels and includes a long under bar segment to act as a cursor The display uses a common multiplexing scheme with each character refreshed in sequence U903 and 0904 are the grid drivers and U901 and U905 are the dot drivers Note that dot driver and grid driver data is serially transmitted from the microcontroller PD3 and PC1 The requires both 60VDC and
75. discussed in Section 2 2 Turnonthe computer the Model 2410 and the digital multimeter Allow the Model 2410 and the multimeter to warm up for at least one hour before performing calibration 3 Make sure the Model 2410 is set for a primary address of 24 Use the front panel MENU GPIB selection to check or change the address 4 sure the digital multimeter primary address is set to its factory default setting 22 5 Make sure the computer bus driver software CECHP EXE is properly initialized 6 Enterthe QBasic editor and type in the following program Check 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 C 4 Calibration Programs Program C 1 Model 2410 calibration program Model 2410 calibration program for use with the HP3458A Digital Multimeter Rev 1 0 11 1 96 2410 primary address 24 HP3458A primary address 22 OPEN IEEE FOR OUTPUT AS 1 Open IEEE 488 output path OPEN IEEE FOR INPUT AS 2 Open IEEE 488 input path PRINT 1 INTERM CRLE Set input terminator PRINT 1 OUTTERM LF Set output terminator PRINT 1 REMOTE 22
76. emove the power supply from the chassis Power module removal Perform the following steps to remove the rear panel power module 1 Remove the analog board Unplug the cable connecting the power module to the digital board 3 Disconnect the power module s ground wire This green and yellow wire connects 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 could result in injury or death the ground wire of the power module must be connected to chassis ground W hen in stalling the power module be sure to re connect the green and yellow ground wire to the threaded stud on the chassis 5 10 Disassembly Instrument re assembly Re assemble the instrument by reversing the previous disassembly procedures Make sure that all parts are properly seated and secured and that all connections are properly made WARNING ensure continued protection against electrical shock verify that power line ground green and yellow wire attached to the power module is con nected to the chassis Also make certain that the two bottom case screws are properly installed to secure and ground the case cover to the chassis 6 Replaceable Parts 6 2 Replaceable Parts Introduction This section contains replacement parts information and component layout drawings for the Model 2410 Parts lists The e
77. ent measurement accuracy 1 16 Case cover removal Detecting calibration errors B 11 Detecting calibration t completio Digital board remova Disassembly 5 1 Environmental condition 2 3 Factory servicd 6 3 Front panel calibratio Front panel disassembl Front panel test 4 3 General program instructiond C 3 Handling and cleaning 5 2 Instrument re assembl Line fuse replacemenj 3 2 Miscellaneous commands B 3 No comm link errof 4 18 Ordering informatio Output current accurac Output voltage accurac Parts lists Performance verification 1 1 Performing the verification test procedure Power on self test 4 2 Principles of operatio Remote calibratio Removing power componenti 5 9 Repair considerations Replaceable parts 6 1 Requesting calibration constants Resistance measurement accurac Restoring factory defaults 1 6 Routine maintenancq 3 1 Single range calibratio Software requirements SpecificationdA 1 Static sensitive device 5 3 Troubleshooting 4 14 13 Verification test requirements Voltage measurement accuracy 1 13 Service Form Model No Serial N o D ate List all control settings describe problem and check boxes that apply to problem Q Intermittent Analog output follows display U Particular range or function bad specify L IEEE failure Q Obvious problem on power up Batteries and fuses OK Front panel oper
78. er test leads and input jacks must be purchased from Keithley Instruments Standard fuses with applicable national safety approvals may be used if the rating and type are the same Other components that are not safety related may be purchased from other suppliers as long as they are equivalent to the original component Note that selected parts should be purchased only through Keithley Instruments to maintain accu racy and functionality of the product If you are unsure about the applicability of a replacement component call a Keithley Instruments office for information To clean the instrument use a damp cloth or mild water based cleaner Clean the exterior of the instrument only Do not apply cleaner directly to the instrument or allow liquids to enter or spill on the instrument Table of Contents l Performance Verification S Verification test requirements a Restoring factory defaults i Performing the verification test procedures Compliance considerationS eee Ouptut voltage accuracy erase ei Voltage measurement aCcuracy i Output current ACCULACY ii Current measurement accuracy eene Resistance measurement nennen 2 Calibration Introduction siciliana E Environmental conditions
79. es all power for the instrument while pro viding universal inputs for the 110 120V line The digital board runs directly from the switcher including the 12VD supply to program the flash ROM A constant frequency switching supply runs off the 12VD supplies and generates all the floating supply voltages for the analog board 5V 15V and 70VF An AC output low volt age supplies the analog board with the power it uses to derive the output stage supply voltages 42V and 1200V Figure 4 3 Power supply block diagram Analog Board O utput Stage 70 15Vp 5V V 15 70Vr 1200V 42V 0 42V 1200V High Voltage Power 1 Constant Frequency Low Noise Floating AC2 Switching Supply Digital Circuits y 412Vd Line 5Vd Neutral Switching Power Supply Y 5 12Vd Troubleshooting 4 9 O utput stage Figure 4 4 shows a simplified schematic of the output stage The Model 2410 output stage serves two purposes 1 it converts signals from floating com mon to output common and 2 it provides both voltage and current amplification The output stage drive transistors are biased in class B configuration to prevent 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 0518 and 0521
80. from the power line and all other equipment before changing the battery The volatile memories of the Model 2410 are protected by a replaceable battery when power is off Typical life for the battery is approximately ten years The battery should be suspected if the instrument no longer retains buffer data or user defined operating parameters such as instru ment setups source memory and math expressions If the battery is absent or totally exhausted the display will show the Reading buffer data lost message shortly after the Model 2410 is switched on The battery is a 3V wafer type lithium cell Panasonic type BR 2330 or equivalent Keithley part number BA 46 which is located on the digital board Replacement of the battery requires removal of the case cover and analog board assembly See Section 5 WARNING precautions below must be followed to avoid personal injury Wear safety glasses or goggles when working with lithium batteries Do not short the battery terminals together Keep lithium batteries away from all liquids Do not attempt to recharge lithium batteries Observe proper polarity when installing the battery Do not incinerate or otherwise expose the battery to excessive heat gt 60 C Bulk quantities of lithium batteries should be disposed of as a hazardous waste DIGNUM ms To replace the battery carefully unsolder it and then solder the new one in its place Re assemble the instrument and tur
81. he desired range and 3 send the desired DATA query Example SENS FUNC VOLT DC Select DC sense function SENS VOLT DC RANGE 0 2 Choose 200mV range CAL PROT SENS DATA Request cal constants Command Reference B 11 D etecting calibration errors If an error occurs during any calibration step the Model 2410 will generate an appropriate error message Several methods to detect calibration errors are discussed below Reading the error queue As with other Model 2410 errors any calibration errors will be reported in the error queue You can read the error queue by using the SYST ERR query Error summary Table B 4 summarizes calibration errors These errors will occur under the following conditions Error 500 501 Error 502 Error 503 504 Error 505 Error 506 Error 507 Error 508 These errors occur if you do not set the calibration date or calibration due date This error 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 This error occurs when the source compliance DAC calibration con stants generate an invalid DAC setting All of the source compliance DAC calibration constants are verified each time a CAL PROT SOUR command is processed and when the Model 2410 is first turned on This error generally occurs when the Model 2410 source circuitry is defec tive This error occurs when a CAL PRO
82. here possible test equipment specifications should be at least four times better than cor responding Model 2410 specifications Table 2 1 Recommended calibration equipment Manufacturer E x Description Model Accuracy Digital Multimeter Hewlett Packard DC voltage 1V 5 6ppm HP3458A 10V 4 3ppm 100V 6 3ppm 1000 6 1 DC current luA 55ppm 10uA 25ppm 100uA 23ppm 1mA 20ppm 100mA 35ppm 1A 110ppm 90 day full scale accuracy specifications of ranges required for various measurement points U nlocking calibration Before performing calibration you must first unlock calibration by entering or sending the calibration password as discussed below U nlocking calibration from the front panel 1 Press the MENU key then choose CAL and press ENTER The instrument will display the following CALIBRATION UNLOCK EXECUTE VIEW D ATES p gt SAVE LOCK CHANGE PASSWORD Select UNLOCK and then press ENTER The instrument will display the following PASSWORD Use 44 p A Y ENTER or EXIT Use the up and down RANGE keys to select the letter or number and use the left and right arrow keys to choose the position Press down RANGE for letters up RANGE for numbers Enter the present password on the display Front panel default 002410 2 6 Calibration 4 Once the correct password is displayed press the ENTER key If the password was cor rectly entered the fol
83. ing card When fuses are used in a product replace with same type and rating for continued protection against fire hazard Chassis connections must only be used as shield connections for measuring circuits NOT as safety earth ground connections If you are using a test fixture keep the lid closed while power is applied to the device under test Safe operation requires the use of a lid interlock If a screw is present connect it to safety earth ground using the wire recommended in the user documen tation The A symbol on an instrument indicates that the user should refer to the operating instructions located in the manual The A symbol on an instrument shows that it can source or measure 1000 volts or more including the com bined effect of normal and common mode voltages Use standard safety precautions to avoid personal contact with these voltages The WARNING heading in a 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 explains hazards that could damage the instrument Such damage may invalidate the warranty Instrumentation and accessories shall not be connected to humans Before performing any maintenance disconnect the line cord and all test cables To maintain protection from electric shock and fire replacement components in mains circuits including the power transform
84. ion Calibration consderations When performing the calibration procedures Make sure that the test equipment is properly warmed up and connected to the Model 2410 front panel INPUT OUTPUT jacks Also be certain that the front panel jacks selected with the TERMINALS switch Always allow the source signal to settle before calibrating each point Do not connect test equipment to the Model 2410 through a scanner or other switching equipment Ifan error occurs during calibration the Model 2410 will generate an appropriate error message See Appendix B for more information WARNING common mode voltage voltage between LO and chassis ground is 250V peak Exceeding this value may cause a breakdown in in sulation creating a shock hazard CAUTION voltage between INPU T OUTPUT and LO or 4 WIRE SENSE HI and LO is 1100V peak The maximum voltage between INPUT OUTPUT HI and 4 WIRE SENSE HI or between INPUT OUTPUT LO and 4 WIRE SENSE LO is 5V E xceeding these voltage values may result in instrument damage Calibration cycle Perform calibration at least once a year to ensure the unit meets or exceeds its specifications Calibration 2 5 Recommended calibration equipment Table 2 1 lists the recommended equipment for the calibration procedures You can use alter nate equipment as long as that equipment has specifications at least as good as those listed in the table W
85. ion PROTected SENSe parameter ranges Sense First parameter Second parameter Third parameter range zero negative full scale positive full scale 0 2V 0 002 to 0 002 0 18 to 0 22 0 18 to 0 22 2 0 02 to 0 02 1 8 to 2 2 1 8 to 42 2 20V 0 2 to 40 2 18 to 22 18 to 422 1000V 2 to 2 800 to 1100 800 to 1100 1E 8to 1E 8 0 9E 6 to 1 1E 6 0 9 6 to 1 1E 6 10uA 1 7 1 7 9E 6 to 11E 6 9E 6 to 11E 6 100uA IE 6to 1E 6 90 6 110 6 90E 6 to 110E 6 1E 5 to 1 5 0 9E 3 to 1 1E 3 0 9E 3 to 1 1E 3 20mA 1E 4 to 1 4 18E 3 to 22E 3 18E 3 to 22E 3 100mA 1E 3 to 1E 3 90E 3 to 110E 3 90E 3 to 110E 3 1 2 1 2 0 9 to 1 1 0 9 to 1 1 Note Parameter steps for each range may be performed in any order but all three parameter steps for each range must be completed For optimum calibration use parameters within recommended limits Calibration 2 17 2 18 Calibration Table 2 7 Recommended CALibration PROTected SOURce parameter ranges Source First parameter Second parameter Third parameter Fourth parameter range negative full scale negative zero positive full scale positive zero 0 2V 0 18 to 0 22 0 002 to 0 002 0 18 to 0 22 0 002 to 0 002 2V 1 8 to 2 2 0 02 to 0 02 1 8 to 2 2 0 02 to 0 02 20V 18 to 22 0 2 to 0 2 18 to 22 0 2 to 0 2 1000V 800 to 1200 2
86. ion when per forming these procedures via remote The correct password must be sent to the unit before sending any other calibration command The default remote password is KI002410 Note 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 and then send the new code The password parameter must be enclosed in single quotes If you change the first two characters of the password to something other than KL you will not be able to unlock calibration from the front panel Example CAL PROT CODE KI002410 Send default code of KI002410 COUNT CALibration PRO Tected CO U NT Purpose To request the number of times the Model 2410 has been calibrated Format cal prot count Response Number of times calibrated Description The COUNT query can be used to determine the total number of times the Model 2410 has been calibrated Example CAL PROT COUNT Request calibration count B 4 Command Reference LO CK CALibration PRO Tected LO CK Purpose To lock out calibration Format cal prot lock Query cal prot lock Response 0 Calibration unlocked 1 Calibration locked D escription The LOCK command lets you lock out comprehensive calibration after completing those procedures Thus LOCK performs the opposite of sending the password with the CODE command The LOCK query returns calibra
87. l be generated by the guard circuit and a guard sense terminal is provided to sense around the voltage drop in the guard leads since significant current can flow 50mA Troubleshooting 4 11 Digital circuitry Refer to Figure 4 5 for the following discussion on digital circuitry The core digital circuitry uses a Motorola 68332 microcontroller running at 16 78MHz The memory configuration includes two 256K X 8 bit EEPROMs and two 128K X 8 bit RAMs used in parallel to utilize the 16 bit data bus of the MPU The RAM is battery backed up providing continued storage of data buffer information during power down cycles and flash ROM support allows internal firmware upgrades using either the serial or GPIB port for downloading new firmware All calibration constants and save setup o are stored in a separate serial EEPROM Set ups 1 through 4 are stored in battery backed up RAM External communication is provided via GPIB and serial interfaces 9914 IEEE 488 standard interface IC is used for the GPIB and a 68332 Queued Serial Module QSM provides the serial UART For internal communications the Time Processing Unit TPU is used for serial communications with the front panel display module and both the TPU and QSM handle digital to analog interfacing Figure 4 5 1 5 3 ROM RAM Digital cir
88. l key except EXIT is pressed the next part of the test sequence is selected The five parts of the test sequence are Checkerboard pattern alternate pixels on and all annunciators Checkerboard pattern and the annunciators that are on during normal operation Horizontal lines pixels of the first digit are sequenced Vertical lines pixels of the first digit are sequenced Each digit and adjacent annunciator is sequenced All the pixels of the selected digit are on When finished abort the display test by pressing EXIT The instrument returns to the FRONT PANEL TESTS MENU Continue pressing EXIT to back out of the menu structure 4 4 Troubleshooting CHAR SET test The character set test lets you display all characters Perform the following steps to run the character set test 1 Display the MAIN MENU by pressing the MENU key Select TEST and press ENTER to display the SELF TEST MENU 3 Select DISPLAY TESTS and press ENTER to display the following menu FRONT PANEL TESTS KEYS DISPLAY PATTERNS CHAR SET 4 Select CHAR SET and press ENTER to start the character set test Press any key except EXIT to cycle through all displayable characters 5 When finished abort the character set test by pressing EXIT The instrument returns to the FRONT PANEL TESTS MENU Continue pressing EXIT to back out of the menu structure Troubleshooting 4 5 Principles of operation The following information is provided to
89. l not exceed the programmed compliance limit Types of compliance There are two types of compliance that can occur real and range Depending upon which value is lower the output will clamp at either the displayed compliance setting real or at the maximum measurement range reading range The real compliance condition can occur when the compliance setting is less than the high est possible reading of the measurement range When in compliance the source output clamps at the displayed compliance value For example if the compliance voltage is set to 1V and the measurement range is 2V the output voltage will clamp limit at 1 V Range compliance can occur when the compliance setting is higher than the possible read ing of the selected measurement range When in compliance the source output clamps at the maximum measurement range reading not the compliance value For example if the compli ance voltage is set to 1V and the measurement range is 200mV the output voltage will clamp limit at 210mV Determining compliance limit The relationships to determine which compliance is in effect are summarized as follows They assume the measurement function is the same as the compliance function Compliance Setting lt Measurement Range Real Compliance Measurement Range lt Compliance Setting Range Compliance You can determine the compliance that is in effect by comparing the displayed compliance
90. lectrical parts lists for the Model 2410 are shown in tables at the end of this section For part numbers to the various mechanical parts and assemblies use the Miscellaneous parts list and the assembly drawings provided at the end of Section 5 O rdering information To place an order or to obtain information concerning replacement parts contact your Keithley representative or the factory see inside front cover for addresses When ordering parts be sure to include the following information Instrument model number Model 2410 Instrument serial number Part description Component designation if applicable Keithley part number Replaceable Parts 6 3 Factory service If the instrument is to be returned to Keithley Instruments for repair 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 instrument Carefully pack the instrument in the original packing carton Write ATTENTION REPAIR DEPARTMENT and the RMA number on the shipping label Component layouts The component layouts for the various circuit boards are provided on the following pages Analog board 2410 100 Display board 2400 110 Digital board 2400 140 6 4 Replaceable Parts Table 6 1 Analog board parts list Circuit designation Description Keithley part no C200 203 2
91. libration Introduction Use the procedures in this section to calibrate the Model 2410 These procedures require accurate test equipment to measure precise DC voltages and currents Calibration can be per formed either from the front panel or by sending SCPI calibration commands over the IEEE 488 bus or RS 232 port with the aid of a computer WARNING _ Theinformation in this section is intended for qualified service personnel only Do not attempt these procedures unless you are qualified to do so Some of these procedures may expose you to hazardous voltages Calibration 2 3 Environmental conditions Temperature and relative humidity Conduct the calibration procedures at an ambient temperature of 18 28 C 65 82 F with rel ative humidity of less than 7046 unless otherwise noted Warm up period Allow the Model 2410 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 instrument s internal temperature to stabilize Typically allow one extra hour to stabilize a unit that is 10 18 F outside the specified temperature range Also allow the test equipment to warm up for the minimum time specified by the manufacturer Line power The Model 2410 requires a line voltage of 85 to 250V at line frequency of 50 to 60Hz The instrument must be calibrated within this range 2 4 Calibrat
92. lowing message will be displayed CALIBRATION UNLO CKED Calibration can now be executed 5 Press EXIT to return to normal display Calibration will be unlocked and will assume the states summarized in Table 2 2 Attempts to change any of the settings listed below with calibration unlocked will result in an error 510 Not permitted with cal un locked NOTE With calibration unlocked the sense function and range track the source function and range That is when SOUR FUNC is set to VOLT the SENS FUNC setting will be VOLT DC When SOUR FUNC is set to CURR the SENS FUNC setting will be CURR DC A similiar command coupling exists for SOUR VOLT RANG SENS VOLT RANG and SOUR CURR RANG SENS CURR RANG Table 2 2 Calibration unlocked states Mode State Equivalent remote command Concurrent Functions OFF SENS FUNC CONC OFF Sense Function Source SENS FUNC source function Sense Volts NPLC 1 0 SENS VOLT NPLC 1 0 Sense Volts Range Source V SENS VOLT RANG lt source_V_range gt Sense Current NPLC 1 0 SENS CURR NPLC 1 0 Sense Current Range Source I SENS CURR RANG source I range Filter Count 10 SENS AVER COUN 10 Filter Control REPEAT SENS AVER TCON REPeat Filter Averaging ON SENS AVER STAT ON Source V Mode FIXED SOUR VOLT MODE FIXED Volts Autorange OFF VOLT RANG AUTO OFF Source I Mode FIXED SOUR CURR MODE FIXED Current Autorange OFF SOUR CURR RANG AUTO OFF Autozero ON SYST AZERO ON Trigger
93. mpedance levels Therefore any static that builds up on you or your clothing may be sufficient to destroy these devices if they are not handled properly Use the following precautions to avoid damaging them CAUTION CMOS devices are installed in the M odel 2410 Handle all semicon ductor devices as being static sensitive Transport and handle ICs only in containers specially designed to prevent static build up Typically you will receive these parts in anti static containers made of plastic or foam Keep these devices in their original containers until ready for installation Remove the devices from their protective containers only at a properly grounded work station Also ground yourself with a suitable wrist strap Handle the devices only by the body do not touch the pins Ground any printed circuit board into which a semiconductor device is to be inserted to the bench or table Use only anti static type desoldering tools Use only grounded tip solder irons Once the device is installed in the PC board it is normally adequately protected and you can handle the boards normally 5 4 Disassembly Assembly drawings Use the assembly drawings located at the end of this section to assist you as you disassemble and re assemble the Model 2410 Also refer to these drawings for information about the Keithley part numbers of most mechanical parts in the unit Front panel assembly 2410 040 Analog
94. n it on The Reading buffer data lost error message will be displayed Send the SYST MEM INIT command to perform the following Clear the reading buffer Initialize instrument setups 1 4 to the present instrument settings Initialize all 100 source memory locations to the present instrument settings Delete user math expressions 4 18 Troubleshooting No comm link error A No Comm Link error indicates that the front panel processor has stopped communicating with the main processor which is located on the digital board This error indicates that one of the main processor ROMs may require reseating in its socket ROMs may be reseated as follows 1 2 3 Turn off the power and disconnect the line cord and all other test leads and cables from the instrument Remove the case cover as outlined in Section 5 Remove the analog board assembly as outlined in Section 5 Locate the two firmware ROMs U15 and U16 located on the digital board These are the only ICs installed in sockets Refer to the component layout drawing at the end of Section 6 for exact locations Carefully push down on each ROM IC to make sure it is properly seated in its socket CAUTION _ Becareful not to push down excessively or you might crack the digital 6 board Connect the line cord and turn on the power If the problem persists additional trouble shooting will be required Disassembly 5 2 Disassembly Introduction
95. n to drive the output Sense resistors in the HI output lead provide output current sensing and a separate sense resistor is used for each current range The 1A range uses 0 2V full scale for a full range 1A output while all other ranges use 2V output for full scale current Voltage feedback is routed either internally or externally There are four voltage ranges 0 2V 2V 20V and 1000V The feedback gain changes for only the 20V and 1000V ranges resulting in three unique feedback gain values A multiplexer directs the voltage 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 the digital section Troubleshooting 4 7 42 42 Figure 4 2 FB 1200 41200 Analog circuitry V DAC W V Clamp block diagram Error Output a Sense Output Amp Stage Resistors HI I Clamp I DAC W Go S 0 s Li IFB VFB Remote NT Control VFB re er IFB 7 Protecti Y rotection Guai AID MUX wy Out NA Protection Guard Sense 4 8 Troubleshooting Power supply Figure 4 3 shows a block diagram of the Model 2410 power delivery system The offline flyback switching power supply provid
96. nts with the same magnitudes as those listed in Table 1 4 6 Repeat the entire procedure using the rear panel INPUT OUTPUT jacks Be sure to select the rear panel jacks with the front panel TERMINALS key Table 1 4 Output current accuracy limits Model 2410 Model 2410 output Output current limits source range current setting 1 year 18 C 28 1 00000 0 99905 to 1 00095uA 100A 10 00001 A 9 9947 to 10 0053uA 100uA 100 0004 A 99 949 to 100 051uA ImA 1 00000mA 0 99946 to 1 00054mA 20mA 20 0000mA 19 9870 to 20 0130mA 100mA 100 000mA 99 914 to 100 086mA 1 1 00000A 0 99640 to 1 00360A Performance Verification 1 15 Figure 1 2 Connections for current verification tests Model 2410 sss EEBB Digital M ultimeter 1 16 Performance Verification Current measurement accuracy Follow the steps below to verify that Model 2410 current measurement accuracy is within specified limits The procedure involves applying accurate currents from the Model 2410 current source and then verifying that Model 2410 current measurements are within required limits 1 With the power off connect the digital multimeter to the Model 2410 INPUT OUTPUT jacks as shown in Figure 1 2 2 Select the multimeter DC current function 3 Setthe Model 2410 to both source and measure current
97. parameter into one of the three parameter ranges summarized in Table B 2 depending on the active SENS FUNC and range If the parameter does not fit into any of the three allowed ranges error number 222 Parameter data out of range will be generated Once the unit has successfully selected the appropriate parameter range it will then check to see if autorange for the active SENS FUNC is enabled If so error number 221 Settings conflict 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 can be sent in any order However once one CAL PROT SENS command executes the other two must also be executed or error number 200 Execution error will occur when the CAL PROT SAVE command is processed at the end of the calibration procedure CAL PROT SENS 2 Calibrate 2V sense range Command Reference B 7 Table B 2 Recommended CALibration PROTected SENSe parameter ranges Sense First parameter Second parameter Third parameter range zero negative full scale positive full scale 0 2V 0 002 to 40 002 0 18 to 0 22 0 18 to 0 22 2V 0 02 to 0 02 1 8 to 2 2 1 8 to 2 2 20V 0 2 to 0 2 18 to 22 18 to 22 1000 2 to 2 800 to 1100 800 to 1100 IE 8to 1 8 0 9E 6 to 1 1E 6 0 9E 6 to 1 1E 6 10uA 1 7 1 7 9 6 to 11E 6 9 6 to 11 6
98. roperly calibrated In some instances however you may want to calibrate only certain ranges To do so complete the entire procedure only for the range s to be calibrated Keep in mind however that you must complete all parameter steps for each source or sense range Also be sure to set calibration dates and save calibration after calibrating the desired range s Routine M aintenance 3 2 Routine Maintenance Introduction The information in this section deals with routine type maintenance that can be per formed by the operator Line fuse replacement WARNING Disconnect the line cord at the rear panel and remove all test leads con nected to the instrument front and rear before replacing the line fuse The power line fuse is accessible from the rear panel just above the AC power receptacle 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 Pullout the fuse carrier and replace the fuse with the type specified in Table 3 1 CAUTION Toprevent instrument damage use only thefusetype specified in Table 3 1 3 Re install the fuse carrier NOTE Ifthe power line fuse continues to blow a circuit malfunction exists and must cor rected Refer to the troubleshooting section of this manual for additional information Table 3 1 Power line fuse Keithley part Linevoltage Rating no
99. rvicing SRQs Calibration Programs C 2 Calibration Programs Introduction This appendix includes a calibration program written in BASIC to help you calibrate the Model 2410 as well as an example program that demonstrates how to request calibration constants Refer to Section 2 for more details on calibration procedures equipment and connections Computer hardware requirements The following computer hardware is required to run the calibration programs BM PC compatible computer Keithley 488 2 KPS 488 2 or KPC 488 2AT or CEC PC 488 IEEE 488 interface for the computer Two shielded IEEE 488 connecting cables Keithley Model 7007 Software requirements In order to use the calibration programs you will need the following computer software Microsoft QBasic supplied with MS DOS 5 0 or later MS DOS version 5 0 or later HP style Universal Language Driver CECHP EXE supplied with Keithley and CEC interface cards listed above Calibration Programs C 3 Calibration equipment The following calibration equipment is required Hewlett Packard HP3458A Digital Multimeter See Section 2 for detailed equipment specifications General program instructions 1 With the power off connect the Model 2410 and the digital multimeter to the IEEE 488 interface of the computer Be sure to use shielded IEEE 488 cables for bus connections Also connect the digital multimeter to the Model 2410 as
100. s for details on trou bleshooting the display board KEYS test The KEYS test lets you check the functionality of each front panel key Perform the following steps to run the KEYS test 1 Display the MAIN MENU by pressing the MENU key 2 Select TEST and press ENTER to display the SELF TEST MENU 3 Select DISPLAY TESTS and press ENTER to display the following menu FRONT PANEL TESTS KEYS DISPLAY PATTERN S CHAR SET 4 Select KEYS and press ENTER to start the test When a key is pressed the label name for that key will be displayed to indicate that it is functioning properly When the key is released the No keys pressed message is displayed 5 Pressing EXIT tests the EXIT key However the second consecutive press of EXIT aborts the test and returns the instrument to the FRONT PANEL TESTS MENU Con tinue pressing EXIT to back out of the menu structure DISPLAY PATTERNS test The display patterns test lets you verify that each pixel and annunciator in the vacuum fluores cent display is working properly Perform the following steps to run the display patterns test 1 Display the MAIN MENU by pressing the MENU key Select TEST and press ENTER to display the SELF TEST MENU Select DISPLAY TESTS and press ENTER to display the following menu FRONT PANEL TESTS KEYS DISPLAY PATTERNS CHAR SET Select DISPLAY PATTERNS and press ENTER to start the display test There are five parts to the display test Each time a front pane
101. select the source and sense range being calibrated For example for the 1mA range the command is SOUR CURR RANG 1E 3 Program the source to output the negative full range value using the SOUR CURR command For example SOUR CURR 1E 3 Note and record the multimeter reading Use the multimeter reading as the parameter for the CAL PROT SOUR and CAL PROT SENS commands For example a typical value for the 1mA range would be CAL PRO T SO UR 1 025E 3 CAL PRO T SEN S 1 025E 3 Program the current source for output using the SOUR CURR 0 0 command Note the multimeter reading Sendthe source and sense calibration commands using the multimeter reading for the parameter For example CAL PROT SOUR 1E 6 CAL PRO T SEN S 1E 6 Setthe source to the positive full range value using the SOUR CURR command For example for the 1mA range SOUR CURR 1E 3 Note and record the multimeter reading Send the source and sense commands using the multimeter reading as the parameter For example CAL PROT SO UR 1 03E 3 CAL PRO T SEN S 1 03E 3 Send the SOUR CURR 0 0 command to set the source current to OA Note and record the multimeter reading Send the CAL PROT SOUR command using the multimeter reading as the command parameter For example CAL PROT SOUR 1E 6 2 22 Calibration Table 2 10 Current calibration initialization commands Command Description SOUR FUNC CURR Select source current mode
102. splay Front T i Panel e 77 RS 232 f gt RS 232 1 0 T T Keyboard I Controller 1 1 l I __J Microcomputer i Analog uos Digital Digital _ Hii 1 cower Supply lt Trigger GPIB I Supply Digital P Interface S77 gt GPIB 1 0 lt r 1 0 I c d SQ Mn pM EE CRI a Line In Digital Section Power Supply 4 6 Troubleshooting Analog circuits Figure 4 2 shows the analog circuitry block D A converters control the programmed voltage and current or voltage compliance and cur rent compliance Each DAC has two ranges a 10V full scale output or a 1 V full scale output The DAC outputs are fed to the summing node FB Either the V DAC or the I DAC has the abil ity to control the main loop If the unit is set for SV source voltage it will source voltage until the compliance current is reached as determined by the I DAC setting and the current loop will override the voltage loop If however the unit is set for SI source current it will source current until the compliance voltage is reached as determined by the V DAC setting and the voltage loop will override the current loop A priority bit in the V clamp I clamp circuit controls these functions The error amplifier adds open loop gain and slew rate control to the system to assure accu racy and provide a controllable signal for the output stage which provides the necessary voltage and current gai
103. t the display adjustment range is within 10 of the present range After adjusting the display to agree with the DMM reading press ENTER The instru ment will then display the following I CAL Press ENTER to Output 0 0000UA Press ENTER The Model 2410 will source OuA and at the same time display the following DMM RDG 0 000000UA Use 4 p A V ENTER or EXIT Note and record the DMM reading and then adjust the Model 2410 display to agree with the actual DMM reading Note that the display value adjustment limits are within 1 of the present range 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 0000uA Press ENTER The Model 2410 will source 1uA and display the following DMM RDG 1 000000uA Use 44 gt A V ENTER or EXIT Figure 2 2 Current calibration test connections 14 15 16 17 18 19 20 Calibration 2 13 Note and record the DMM reading and then adjust the Model 2410 display to agree with the DMM reading Again the maximum display adjustment is within 10 of the present range After adjusting the display value to agree with the DMM reading press ENTER and note that the instrument displays I CAL Press ENTER to Output 0 0000uA Press ENTER The Model 2410 will source and simultaneously display the following DMM RDG 0 000000UA Use 4 gt A V ENTE
104. te that the instrument displays V CAL Press ENTER to Output 000 00mV Press ENTER The Model 2410 will source OmV and simultaneously display the following DMM RDG 000 0000mV Use 4 p A V ENTER or EXIT Note and record the DMM reading and then adjust the display to agree with the DMM reading Once again the maximum adjustment is within 1 of the present range After adjusting the display to agree with the DMM reading press ENTER to complete calibration of the present range Press EXIT to return to normal display and then select the 2V source range Repeat steps 2 through 18 for the 2V range After calibrating the 2V range repeat the entire procedure for the 20V and 1000V ranges using Table 2 3 as a guide Be sure to select the appropriate source range with the EDIT and RANGE keys before calibrating each range Press EXIT as necessary to return to normal display Calibration 2 11 Figure 2 1 Voltage calibration test connections Model 2410 Input HI essa Ei Digital M ultimeter Input LO Table 2 3 Front panel voltage calibration Source Source Multimeter voltage range voltage reading 0 2V 200 00mV mV 000 00m V mV 200 00mV mV 000 00mV mV 2V 2 0000V 0 0000V 2 0000V 0 0000V lt lt lt 4 20 20 000V 00 0
105. te default to CAL CAL PRO T CO DE K1002410 CAL PRO T CO DE You can use any combination of letters and numbers up to a maximum of eight characters NOTE If you change the first two characters of the password to something other than KI you will not be able to unlock calibration from the front panel 2 8 Calibration Resetting the calibration password If you lose the calibration password you can unlock calibration by shorting together the CAL pads which are located on the display board Doing so will also reset the password to the factory default KI002410 See Section 5 for details on disassembling the unit to access the CAL pads Refer to the dis play board component layout drawing at the end of Section 6 for the location of the CAL pads Viewing calibration dates and calibration count When calibration is locked only the UNLOCK and VIEW DATES selections will be acces sible in the calibration menu To view the calibration dates and calibration count at any time 1 From normal display press MENU select CAL and then press ENTER The unit will display the following CALIBRATION UNLOCK EXECUTE VIEW D ATES gt 2 Select VIEW DATES and then press ENTER The Model 2410 will display the next and last calibration dates and the calibration count as in the following example NEXT CAL 12 15 97 Last calibration 12 15 96 Count 0001 Calibration errors The Model 2410 checks for errors after e
106. ter or number and use the left and right arrow keys to choose the position Enter the present password on the display Front panel default 002410 Press ENTER to complete the process 4 Press EXIT 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 Connect the Model 2410 to the digital multimeter as shown in Figure 2 1 Select the multimeter DC volts measurement function NOTE The 2 wire connections shown assume that remote sensing is not used Remote sens ing may be used if desired but it is not essential when using the recommended digital multimeter 2 From normal display press the SOURCE V key 3 Press the EDIT key to select the source field cursor flashing in source display field and then use the down RANGE key to select the 200mV source range 4 From normal display press MENU 5 Select CAL and then press ENTER The unit will display the following CALIBRATIO N UNLOCK EXECUTE VIEW D ATES gt SAVE LOCK CHANGE PASSWO RD 6 Select EXECUTE and then press ENTER The instrument will display the following message V CAL Press ENTER to Output 200 00mV 7 Press ENTER The Model 2410 will source 200mV and simultaneously display the following DMM RDG 200 0000mV Use 44 p A ENTER or EXIT 2 10 Calibration 10 11 12 13 14
107. the unit Test considerations When performing the verification procedures Be sure to restore factory front panel defaults as outlined above Make sure the test equipment is properly warmed up and connected to the Model 2410 INPUT OUTPUT jacks Also be sure that the front panel jacks are selected with the TERMINALS key Make sure the Model 2410 is set to the correct source range Be sure the Model 2410 output is turned on before making measurements Be sure the test equipment is set up for the proper function and range Allow the Model 2410 output signal to settle before making a measurement Do not connect test equipment to the Model 2410 through a scanner multiplexer or other switching equipment WARNING common mode voltage voltage between LO and chassis ground is 250V peak Exceeding this value may cause a breakdown in in sulation creating a shock hazard CAUTION voltage between INPU T OUTPUT and LO or 4 WIRE SENSE HI and LO is 1100V peak The maximum voltage between INPUT OUTPUT HI and 4 WIRE SENSE HI or between INPUT OUTPUT LO and 4 WIRE SENSE LO is 5V E xceeding these voltage values may result in instrument damage 1 8 Performance Verification Setting the source range and output value Before testing each verification point you must properly set the source range and output value as outlined below 1 Presseither the SOURCE V or SOURCE I key to
108. timeter reading as the parameter For example CAL PROT SO UR 1 997 CAL PRO T SEN S 1 997 Send the SOUR VOLT 0 0 command to set the source voltage to OV Note and record the multimeter reading Send the CAL PROT SOUR command using the multimeter reading as the command parameter For example CAL PRO T SO UR 1 02E 3 2 20 Calibration Table 2 8 Voltage calibration initialization commands Command D escription RST Restore GPIB defaults SOUR FUNC VOLT Activate voltage source SENS CURR PROT 0 01 Current limit when voltage source is active SENS CURR RANG 0 01 Make sure 100mA range is not active SOUR VOLT PROT MAX Maximum allowable source voltage SYST RSEN OFF Disable remote sensing CAL PROT CODE K1002410 Unlock cal OUTP STAT ON Turn source on Remote sensing may be used if desired but is not essential when using recommended digital multimeter To use remote sensing send SYST RSEN ON Table 2 9 Voltage range calibration commands Step Command procedure Description 1 SOUR VOLT RANGE Range Select source range 2 SOUR VOLT lt Source_value gt Establish negative full range polarity 3 Take DMM reading Read actual output value 4 CAL PROT SOUR lt DMM_Reading gt Calibrate sense function negative full scale 5 Check 2410 for errors 6 CAL PROT SENS DMM Reading Calibrate source function negative full scale 7 Check 2410 for errors 8 SOUR VOLT 0
109. tis iret tasha ele eoa A Specifications Accuracy calculations i A 2 B Command Reference Introduction u Command eee de rrt s Miscellaneous commands i Detecting calibration errors ii Detecting calibration step completion C Calibration Programs Introduction Computer hardware requirements 2 Software reduirements rss Calibration equipment i General program instructions Requesting calibration constants iii List of Illustrations l Performance Verification Connections for voltage verification tests Connections for current verification tests Connections for resistance accuracy verification 2 Calibration Voltage calibration test connections 2 11 Current calibration test connections 2 13 3 Routine Maintenance Rear panel iei dete Eee tee ris eda aan 3 3 4 Troubleshooting Overall block diagram seen Analog circuitry block Power supply block diagram sese Output stage simplified schematic Digit
110. tive 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 range or if the source is in autorange or in standby error number 221 Settings conflict will be generated If no error occurs the active source function range point will be calibrated using the corresponding parameter Note that parameters for a given source function and range may be sent in any order However once one CAL PROT SOUR command executes the other three must also be executed or error number 200 Execution error will occur when the CAL PROT SAVE command is processed at the end of the calibration procedure Because the source is calibrated for both positive and negative values two zero calibration points are required The Model 2410 automatically uses the appropriate zero parameter based on whether the source polarity is positive or negative CAL PROT SOUR 2 Calibrate 2V source range Table B 3 Command Reference Recommended CALibration PROTected SOURce parameter ranges B 9 Source First parameter Second parameter Third parameter Fourth parameter range negative full scale negative zero positive full scale positive zero 0 2V 0 18 to 0 22 0 002 to 0 002 40 18 to 0 22 0 002 to 0 002 2V 1 8 to 2 2 0 02 to 0 02 1 8 to 2 2 0 02 to 0 02 20V 18 to 22 0 2 to 40 2 18 to 422 0 2 to
111. ument is still under warranty and its performance is outside specified limits contact your Keithley representative or the factory to determine the cor rect course of action Performance Verification 1 3 Verification test requirements Be sure that you perform the verification tests Under the proper environmental conditions After the specified warm up period Using the correct line voltage Using the proper test equipment Using the specified output signal and reading limits Environmental conditions Conduct your performance verification procedures in a test environment with Anambient temperature of 18 28 65 82 F Arelative humidity of less than 70 unless otherwise noted Warm up period Allow the Model 2410 to warm up for at least one hour before conducting the verification procedures If the instrument has been subjected to temperature extremes those outside the ranges stated above allow additional time for the instrument s internal temperature to stabilize Typically allow one extra hour to stabilize a unit that is 10 18 F outside the specified tem perature range Also allow the test equipment to warm up for the minimum time specified by the manufacturer Line power The Model 2410 requires a line voltage of 85 to 250V and a line frequency of 50 to 60Hz Verification tests must be performed within this range 1 4 Performance Verification Recommended test equipment
112. us from the standard event status register to set the ESB event summary bit in the status byte when operation complete is detected 2 Sendthe OPC command immediately following each calibration command For example CAL PRO T SEN S 2 0 PC 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 command 3 After sending a calibration command repeatedly test the ESB Event Summary bit bit 5 in the status byte until it is set Use STB to request the status byte 4 Once operation complete has been detected clear OPC status using one of two methods 1 use the ESR query and then read the response to clear the standard event status register or 2 send the CLS command to clear the status registers Note that sending CLS will also clear the error queue and operation complete status B 14 Command Reference Generating an SRQ on calibration complete An IEEE 488 bus SRQ service request can be used to detect operation complete instead of repeatedly polling the Model 2410 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 described Clear the SRQ by querying the ESR using the ESR query to clear OPC status and then request the status byte with the STB query Refer to your controller s documentation for information on detecting and se
113. y 1997 Addendum A Document Number 2410 902 02 i April 1997 Revision B Document Number 2410 902 01 nennen July 1998 All Keithley product names are trademarks or registered trademarks of Keithley Instruments Inc Other brand names are trademarks or registered trademarks of their respective holders Safety Precautions The following safety precautions should be observed before using this product and any associated instrumen tation Although some instruments and accessories would normally be used with non hazardous voltages there are situations where hazardous conditions may be present This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury Read the operating information carefully before using the product The types of product users are Responsible body is the individual or group responsible for the use and maintenance of equipment and for en suring that operators are adequately trained Operators use the product for its intended function They must be trained in electrical safety procedures and proper use of the instrument They must be protected from electric shock and contact with hazardous live cir cuits Maintenance personnel perform routine procedures on the product to keep it operating for example setting the line voltage or replacing consumable materials Maintenance procedures

Model 2410 1100V SourceMeter®

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Model 2410 1100V SourceMeter®