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Models 2510 and 2510-AT

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6. 4 2 901 01 lt 2 LTR ECA NO REVISION ENG DATE V V E 0 A PRELIMINARY AJS 5 24 99 B PRELIMINARY CAD 9 2 23834 RELEASED LM CAD 12 1 99 ADDED DELETED CHG D PART 3898 E AA 8 00 65995 REFER TO FOR DETAILS 25168 ADDED J103 NOT POPULATED MS 1 18 01 F 25747 A N REV E ADDED C500 5 02 23 02 2 158 2 M03 M102 55 cise _ 157 x J1014 4 Ner M 135 cis ES RESET gx i ind 4l SI e T e n TP113 5VD ooo J1008 a sS TO R261 E WV gt A 2 cix 5 O 8 2228558 8 1114 237 d KG o
7. 000001001000 00000000000 0901 00000005 00000007 MC 612 SIDE 02 ONLY C911 OO OO L 0000000000 R908 6916 GROUND E KC 2001 3552 SIDE a DETAIL FOR MORE COMPONENT INFORMATION REFER TO 2400 PRODUCT STRUCTURE NOTE DIMENSIONAL TOLERANCES 5 gt 2 1 MODEL NEXT ASSEMBLY USED ON SCALE 3 2 TITLE COMPONENT LAYOUT DISPLAY BOARD ENG appa AJC KET THLEY KEITHLEY INSTRUMENTS INC CLEVELAND OHIO 44139 D Specifications 2510 TEC SourceMeter The Model 2510 Thermoelectric Cooler Controller is designed to control the power to the TEC to maintain a constant temperature current voltage or thermistor resistance measure the resistance of the TEC software PID lo
8. LTRIECA NO REVISION ENG DATE 070 0152 B 25369 ADDED 239 1 ST 17 12701 Em BI 26779 Add 1 1788 Sr 2510 308B FRONT PANEL ODE Y 2001 3 BOARD STOP 2 REQ D PLACE ON FRONT PANEL TABS AND SLIDE TOWARDS OUTSIDE EDGE OF PANEL 2400 1100 DISPLAY BOARD ASSEMBLY RED SNAP TOP OF BOARD INTO FRONT PANEL d eun SIDE 6517 3098 LENS LED 2510 004 PL 113 1 ASSEMBLY 239 1 2510 309A OVERLAY USE T 7935 6430 313A OVERLAY MEMBRANE SWITCH 2510 315A CONDUCTIVE RUBBER SWITCH USE T 7936 TO CUT SWITCH 2510 3118 DISPLAY LENS DO NOT REMOVE THE GREEN MASK FROM THE LENS NUSE T 1788 PART NUMBER QTY DESCRIPTION 2510 3088 FRONT PANEL SAU TUM Ue EEE 2510 2510 05 Front Panel Chassis Assy MODEL NEXT ASSEMBLY NEXT PROCESS STEP QTY 2510 3118 DISPLAY LENS 2510 315A CONDUCTIVE RUBBER SWITCH 50012371 A 5 P C BOARD STOP SCALES Th tee Dele UNLESS OTHERWISE SPECIFIED t Panel Assembly 066 6511 3098 LENS LED KX gt 015 ANG f 2510 004 CRIMP ASSEMBLY ILEY Keithley Instruments Inc XXX 005 FRAC EI 64 2510 309 OVERLAY Cleveland Ohio 44139 ae 25 0 040 239 1 CABLE Z SURFACE
9. Models 2510 and 2510 AT Calibration Reference B 3 Miscellaneous commands Miscellaneous commands are those commands that perform such functions as unlocking calibration saving calibration constants locking out calibration and programming date parameters CODE CALibration PROTected CODE Purpose To unlock calibration so that you can perform the calibration procedures Format cal prot code password Parameters Up to a 8 character string including letters and numbers Description The CODE command sends the password code and enables calibration when performing these procedures via remote The correct password must be sent to the unit before sending any other calibration command The default remote password is 1002510 NOTE The CODE command should be sent only once before performing calibration Do not send CODE before each calibration step To change the code first send the present code then send the new code The password parameter must be enclosed in single quotes e If you change the first two characters of the password to something other than you will not be able to unlock calibration from the front panel Example CAL PROT CODE KI002510 Send default code of KI002510 COUNT CALibration PROTected COUNT Purpose To request the number of times the Model 2510 has been calibrated Format cal prot count Response Number of times calibrated Description The COUNT query may b
10. Deore g CAUTION ron CONTINUED PROTECTION AGAINST FIRE HAZARO REPLACE FUSE WITH SAME TYPE AND RATING Model 2510 2 10 Calibration Models 2510 and 2510 AT 3 Select the DMM DC voltage function and enable auto range Press ENTER The unit will then prompt for the 8 5V step VOLTAGE CAL Press ENTER to output 8 5V NOTE output will turn on automatically when you perform the next step 5 Press ENTER The Model 2510 will source 8 5V and simultaneously display the following DMM RDG 08 50000 V Use 4 A V ENTER or EXIT 6 Note and record the DMM reading and then use the EDIT keys to adjust the Model 2510 display to agree exactly with the actual DMM reading 7 After adjusting the display to agree with the DMM reading press ENTER The instru ment will then display the following VOLTAGE CAL Press ENTER to output 0 0V 8 Press ENTER The Model 2510 will source OV and at the same time display the following DMM RDG 00 00000 V Use 4 P A V ENTER or EXIT 9 Note and record the DMM reading and then adjust the Model 2510 display to agree with that reading 10 After adjusting the display value to agree with the DMM reading press ENTER The unit will then display the following VOLTAGE CAL Press ENTER to output 8 5V 11 Press ENTER The Model 2510 will source 8 5V and display the following DMM RDG 08 50000 V Use 4 P A V ENTER or EXIT 12 Note and record the DMM reading adjust the Model 2510 displa
11. 5 2 Handling and cleaning 2 5 2 Handling PC boards eee 5 2 Solder repaits 5 2 Static sensitive DEVICES e tee a d oett 5 3 Assembly drawings 2 5 3 Case cover removal x de deep Pee 5 4 Mother board removal 5 4 Front panel disassembly 5 5 Removing power components 5 5 Power supply module removal sees 5 5 Power module removal eee 5 6 tet er 5 6 Instrument reassembly essere 5 6 Replaceable Parts Introduction 2 eet irte intet eet Pere Hee edet 6 2 6 2 Ordering information 6 2 Factory Service elastic Re Rr e aS 6 2 Component layouts eene nete 6 2 Specifications Calibration Reference Introduction ettet eet ie etaed B 2 Command summary B 2 Miscellaneous commands B 3 SENSe commands oe deste detenti ette tut B 6 SOURce commands 2 B 8 DAC commands 1 4 six drei edt B 9 RESistance commands B 9 De
12. v 050 0164 DETAIL A BLU POWER MODULE WIRING CC 38 2 NO REVISION ENG DATE B 24166 Added 5 211 1 ST 13 20 00 BI 24459 2510 302B Was 2510 3024 ST 15 18 00 B2 25369 CHANGED TORQUE SPEC ST 10 12 01 26756 2510 302 Was 2510 3028 POWER MODULE C0282 CABLE TIE BRN 2510 004 SC 73 GRN YEL 6 32KEPNUT 10 CABLE TIE IN LBS GRN YEL FROM POWER SUPPLY PS 7T7 1A POWER SUPPLY SEE DETAIL B INSTALL WIRES BEFORE PLACING IN CHASSIS CC 31 CABLE CLAMP FOR POWER SUPPLY WIRES PLACE EDGE OF CLAMP NEXT TO POWER SUPPLY ON CHASSIS BOTTOM INSTALL 5 FROM FRONT EDGE OF CHASSIS 2510 004 FN 39 dd 2 PLCS WASHER 4 40KEPNUT 2 EACH REQ D 4 IN LBS WA 85 1 ASS Y p 8 IN LBS 2510 004 MC 285 SERIAL NUMBER 2 PM 1 1B POWER MODULE 0 SUPPLIED SCREWS SEE DETAIL A FOR WIRING 2510 302C CHASSIS 5 IN LBS FU 106 2 5 FUSE 9 N AX 2 phy FROM POWER bd b M3Y6MMPF H PLACE WIRES MODULE T 2 REQ D 5 IN LBS IN CABLE CLAMP FH 39 FUSE HOLDER PART NUMBER QTY DESCRIPTION c 2510 302C CHASSIS 5 11 1 POWER SUPPLY CORTE IE 428 3194 2 FOOT amp SAFETY COVER FE 6 2 FOOT SUPPLIED
13. ON SOUR VOLT 8 5 CAL PROT SENS VOLT lt DMM_Reading gt CAL PROT SOUR lt DMM_Reading gt SOUR VOLT 0 CAL PROT SENS VOLT DMM Reading CAL PROT SOUR lt DMM_Reading gt SOUR VOLT 8 5 CAL PROT SENS VOLT lt DMM_Reading gt CAL PROT SOUR lt DMM_Reading gt OUTP OFF ON CAL PROT SENS CURR Resistance Value CAL PROT IPD OUTP OFF DMM to OU DMM to OU DMM to OU DMM to OU DMM to OU DMM to OU TPU TPU TPU TPU TPU TPU T Figure 2 1 T Figure 2 1 T Figure 2 1 T Figure 2 1 T Figure 2 1 T Figure 2 1 1Q to OUTPUT Figure 2 2 1Q to OUTPUT Figure 2 2 2 22 Calibration Table 2 6 cont Remote calibration step summary Calibrated function Calibration command Models 2510 and 2510 AT Test connections Temperature Thermistor sensor RTD sensor Current sensor Voltage sensor AC ohms Voltage source SYST RSEN SENS TEMP TRAN THER SENS TEMP THER RANG 100 CAL PROT TEMP Resistance Value CAL PROT TEMP 0 SENS TEMP THER RANG 1e3 CAL PROT TEMP Resistance Value CAL PROT TEMP 0 SENS TEMP THER RANG 164 CAL PROT TEMP Resistance Value CAL PROT TEMP 0 SENS TEMP THER RANG 1 5 CAL PROT TEMP Resistance Value CAL PROT TEMP 0 SENS TEMP TRAN RTD SENS TEMP RTD RANG 100 CAL PROT TEMP Resistance Value CAL PROT TEMP 0 SENS TEMP RTD RANG 1000 CAL PROT T
14. 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 Table 4 1 Display board checks Step Item component Required condition Remarks 1 Front panel test Verify that all segments operate Use front panel display test 2 1033 5V 5 Digital 5V supply 3 10902 pin 1 Goes low briefly on power up and then goes high Microcontroller RESET 4 U902 pin 43 4MHz square wave Controller 4MHz clock 5 0902 pin32 Pulse train every 1 ms Control from main processor 6 U902 pin 33 Brief pulse train when front panel key is pressed Key down data sent to main processor 4 16 Troubleshooting Models 2510 and 2510 AT 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 receptacle power on Check for correct power up sequence 3 J1003 pin 3 15V 10 15VPWR Referenced to TP121 4 TP102 5V 5 5 VF Referenced to TP121 5 TP112 5V 5 5VD Referenced to U163 pin 19 6 0 15V 5 15VA Referenced to 122 7 TP105 15V 5 15VA Referenced to TP122 8 TP1
15. EE SE R226 U105 o R107 5 000000000 104 i i C196 R194 8196 Spits S I c3 8 0124 2 4216 7 24 2608315 0 H R106 111 J 19103 qos gt 8 5 9 CRITS R275 R280 cmiig CR120 me 0 qui 00000000 00000000 5000030 000000005224 0153 5279 L124 JUD UU dU UU goud e a 2 3 JL S R278 0102 1 068112 eli 1 6 2 e DD 000000007 000 1 60000000 0 loa a qq an 1123 5110 0134 So R211 001011107 e C278 HS109 0110 zo ox 3 0133 4015127 S 0109 5 C247 R2120 8 y 9 O 8 a a eal 133 TP 120 soos es 0 al O Cy V ee 6214 O OT O je 8306 L115 EOC O 5 eb 6500 ay O x Z korog D O S eS Cu 8 o p 4 gt lt C lt Yo N uh 6104 CR109 BS SO 5 2 52 101 1 le Mio cat 0173 OJO NOTE lt gt HS107 C256 172 132 Lit yon f CE xu eas 0107 205 FOR FURTHER COMPONENT INFORMATION AE loh emer DES or 3 REFER TO 2510 PRODUCT STRUCTURE O 0108 HR O 29 6 S 5108 VE Os C272 C213
16. Keithley KPC 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 e Microsoft QBasic supplied with MS DOS 5 0 or later or Quick Basic e MS DOS version 5 0 or later or Windows 95 98 Me HP style Universal Language Driver CECHP EXE supplied with Keithley and CEC interface cards listed above Calibration equipment The following calibration equipment is required e Keithley Model 2002 DMM 1 1000 1kQ 10kQ and 100kQ resistors Clean copper wire See Section 2 for detailed equipment specifications Models 2510 and 2510 AT Calibration Program C 3 General program instructions 1 With the power off connect the Model 2510 and the digital multimeter to the IEEE 488 interface of the computer Be sure to use shielded IEEE 488 cables for bus connections 2 Turn onthe computer the Model 2510 and the digital multimeter Allow the Model 2510 and the multimeter to warm up for at least one hour before performing calibration 3 Make sure the Model 2510 is set for a primary address of 15 Use the front panel MENU COMMUNICATIONS GPIB selection to check or change the address Make sure the digital multimeter primary address is set to 16 5 Make sure that the computer bus driver software is pr
17. 1kQ 1 10kQ 1 100kQ 1 INPUT OUTPUT _ Keithley CS 846 Mating Connector 1 Ninety day full range accuracy specification of ranges required for various measurement points 2 Characterize all resistors using 4 wire ohms function of recommended DMM before use 3 One connector supplied with Model 2510 Models 2510 and 2510 Performance Verification 1 4 Resistor characterization The resistors listed in Table 1 1 must be characterized using the 4 wire ohms function of the recommended DMM before use Be sure to use the lowest resistance range possible for each measurement for best accuracy Characterized values can be recorded in Table 1 2 Table 1 2 Characterized resistor values Nominal resistance Characterized resistance 1Q Q 1009 _ 1kQ kQ 10kQ kQ 100kQ kQ Characterize value using DMM see Table 1 1 Verification limits The verification limits stated in this section have been calculated using only the Model 2510 one year accuracy specifications and they do not include test equipment uncertainty If a particular measurement falls outside the allowable range recalculate new limits based on Model 2510 specifications and corresponding test equipment specifications Example limits calculation As an example of how verification limits are calculated assume you are testing the operating voltage function using a 10V value Using the Model 2510 operating voltage one year accuracy
18. Flat 2B Willocrissa 14 Rest House Crescent Bangalore 560 001 91 80 509 1320 21 Fax 91 80 509 1322 ITALY Viale San Gimignano 38 20146 Milano 02 48 39 16 01 Fax 02 48 30 22 74 JAPAN New Pier Takeshiba North Tower 13F 11 1 Kaigan 1 chome Minato ku Tokyo 105 0022 81 3 5733 7555 Fax 81 3 5733 7556 KOREA FL URI Building 2 14 Yangjae Dong Seocho Gu Seoul 137 130 82 2 574 7778 Fax 82 2 574 7838 NETHERLANDS Postbus 559 4200 AN Gorinchem 0183 635333 Fax 0183 630821 SWEDEN c o Regus Business Centre Frosundaviks All 15 44 169 70 Solna 08 509 04 679 Fax 08 655 26 10 SWITZERLAND Kriesbachstrasse 4 8600 D bendorf 01 821 94 44 Fax 01 820 30 81 TAIWAN 1FL 85 Po Ai Street Hsinchu Taiwan R O C 886 3 572 9077 Fax 886 3 572 9031 2 02 Models 2510 and 2510 AT TEC SourceMeter Service Manual All references in this manual to the Model 2510 also apply to the Model 2510 AT unless otherwise specified 2000 Keithley Instruments Inc All rights reserved Cleveland Ohio U S A Fourth Printing February 2002 Document Number 2510 902 01 Rev D 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 chang
19. GAIN_16 MUXC MUXB MUXA 10_MA Range N C SHUNT 100 A2DGND SHUNT_1K N C SHUNT_10K MUXSTB MEAS 100K MEAS 10K MEAS 1K MEAS 100 2 WIRE 1MA 100UA DIV 3 Models 2510 and 2510 AT Troubleshooting 4 15 Display board circuits 902 is the display microcontroller that controls the VFD vacuum fluorescent display interprets key data The microcontroller has four peripheral I O ports that are used for the vari ous 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 mother board through the RXB line via PD1 The 4MHz clock for the microcontroller is generated on the digital board DS901 is the VFD 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 U904 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 Troubleshooting Troubleshooting information for the various circuits is summarized below Refer to the com ponent layout drawings at the end of Section 6 for component locations
20. Modulator AHI BLO B Pulse Width Modulator Waveforms Models 2510 and 2510 AT Troubleshooting 4 9 Figure 4 5 shows alternate switching phases of the H bridge output stage as well as a simpli fied schematic of the step down buck regulator Note that the bridge switches between alter nate configurations as shown with the duration and duty cycles controlled by the pulse width modulator The step down buck regulator smooths the H bridge switching waveform into a constant DC level Figure 4 5 15V 15V H bridge switching and step down regulator A H Bridge 4L B Step Down Buck Regulator 4 10 Troubleshooting Models 2510 and 2510 AT Measurement circuits Signal conditioning for the external temperature sensor is provided by U124 U149 and associated components Voltage and current feedback signals from the TEC output terminals are developed by U147 and U151 The conditioned temperature sensor voltage and current feedback signals are fed to the multiplexer IC U142 that switches among the signals during the various phases of the mea surement cycle The output of the mux is fed to the A D converter for conversion to digital data Additional signals switched by the mux during the measurement cycle include a reference volt age reference temperature internal circuit board temperature signal and an internal 15V measurement Sensor conditioning Figure 4 6 shows a simplified schematic of the sens
21. V ENTER or EXIT 4 Setthe calibration due date to the desired value then press ENTER Press ENTER again to confirm the date 5 Once the calibration dates are entered calibration is complete and the following mes sage will be displayed CALIBRATION COMPLETE Press ENTER to save EXIT to abort 6 Press ENTER to save the calibration data or press EXIT to abort without saving cali bration data Step 8 Lock out calibration From the CAL EXECUTE menu select LOCK then press ENTER to lock out calibration Press EXIT to return to normal display 2 20 Calibration Models 2510 and 2510 AT 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 command summary Table 2 5 summarizes remote calibration commands used in this section NOTE Fora detailed description of all calibration commands and queries refer to Appendix B Table 2 5 Remote calibration command summary Command Description CALibration Calibration subsystem PROTected Calibration commands protected by code password CODE lt password gt Unlock calibration Default code password 1002510 SENSe VOLTage lt NRf gt Calibrate Peltier voltage measurement CURRent lt NRf gt Calibrate current measurement TEMPerature lt NRf gt Calibrate temperature measurem
22. specification of 0 1 of reading 4mV offset the calculated output limits are Limits 10V 10V x 0 1 4mV Limits 10V 0 01 0 004 Limits 10V 0 014V Limits 9 986 to 10 014V Resistance limits calculation When verifying accuracy for tests using the precision resistors it will be necessary to recal culate resistance limits based on the actual characterized resistance values You can calculate resistance reading limits in the same manner described above but be sure to use the actual characterized resistance values and the Model 2510 one year accuracy specifications for your calculations see Appendix A 1 5 Performance Verification Models 2510 and 2510 AT 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 2 Select SAVESETUP and then press ENTER The unit then displays SAVESETUP MENU SAVE RESTORE POWERON RESET 3 Select RESET and then press ENTER The unit displays RESET ORIGINAL DFLTS BENCH GPIB 4 Select BENCH and then press ENTER to restore BENCH defaults Performing the verification test procedures Test summary Voltage accuracy e Current accuracy AC resistance accuracy Sensor measurement accuracy If the Model 2510 is not within specifications an
23. 1 1 3W R 475 1 R210 R305 R313 R314 R315 R320 RES 10K 1 100MW THICK FILM R 418 10K R211 R215 R252 RES 10M 1 125MW THICK FILM R 418 10M R212 RES 18K 1 1 10W METAL FILM R 263 18K R213 235 236 241 247 249 251 253 263 266 RES 10K 1 1000MW THICK FILM R 418 10K R214 RES 32K 1 1 10W METAL FILM R 263 32K 220 222 230 231 258 262 267 272 280 281 RES 1 100MW THICK FILM R 418 1K R223 R224 R225 R226 R227 R228 R229 R232 RES 475 1 100MW THICK FILM 418 475 R233 R234 R237 RES 475 1 100MW THICK FILM R 418 475 R238 RES 15k 1 100MW THICK FILM R 418 15K R240 RES 332K 1 100MW THICK FILM R 418 332K R268 R269 R27 L R274 271 282 283 285 290 RES 10K 1 1000MW THICK FILM R 418 10K R273 RES 100 5 250MW METAL FILM R 376 100 R278 RES 100 1 1 10W METAL FILM R 263 100 R291 292 312 R158 RES 1 100MW THICK FILM R 418 1K R308 RES 1 1 10W METAL FILM R 263 229 R309 RES 56 2 1 1 10W METAL FILM R 263 56 2 101 TRANSIENT VOLTAGE SUPPRESSOR VR 25 SO 168 SOCKET PLCC 032 T A SO 143 32 101 TRANSFORMER TR 315A TP103 TP104 TP111 TP113 TP118 TP120 SURFACE MOUNT PCB TEST POINT CS 1026 Models 2510 and 2510 AT Replaceable Parts 6 7 Table 6 1 cont Mother board parts list Keithley Circuit designation Description part no TP121 TP122 SURFACE MOUNT PCB TEST POINT CS 1026 U101 IC 5V VOLTAGE REGULATOR LM2940CT 576 U102 IC VOLTAGE REGULATOR IC 1133 U103 IC 15V
24. CAP 100UF 20 10V ALUM ELEC C 483 100 C139 C140 C144 C145 CAP 470 20 50 ALUM C 579 47 151 156 178 187 199 210 236 150 22UF 20 25 TANTALUM 440 22 162 163 167 170 171 181 182 196 198 200 CAP 1UF 10 25 CERAMIC C 495 1 C164 C184 CAP 2200P 10 100V CERAMIC C 430 2200P C165 166 186 193 220 225 226 229 230 231 CAP 01UF 10 50V CERAMIC C 491 01 C168 169 183 195 197 250 268 CAP 47P 5 100V CERAMIC C 465 47P C173 251 266 117 147 297 305 CAP 1000 10 50 MONO CERAMIC C 452 1000P C176 177 180 208 209 214 215 216 253 271 CAP 1UF 20 50 CERAMIC C 418 1 179 247 260 265 275 292 100P 10 100V CERAMIC C 451 100P 201 202 203 211 212 213 219 221 222 CAP 1UF 10 25V CERAMIC C 495 1 C223 CAP 47PF 10 100V CERAMIC C 451 47P C224 C228 CAP 1 100V CERAMIC C 512 15P C227 233 234 237 238 239 240 24 1 243 CAP 1UF 10 25V CERAMIC C 495 1 232 235 242 245 282 CAP OLUF 10 50V CERAMIC C 491 01 246 248 249 252 254 255 256 261 267 269 CAP 1UF 10 25V CERAMIC C 495 1 270 295 218 296 1UF 20 50V CERAMIC C 418 1 272 273 IUF 20 100V CERAMIC C 487 1 277 278 280 281 283 289 291 293 294 1UF 10 25 CERAMIC C 495 1 C279 CAP 1UF 20 100V CERAMIC C 436 1 CR101 CR113 DIODE MBRS140T3 RF 110 6 4 Replaceable Parts Table 6 1 cont Mother board parts list Circuit designation
25. CO 7 LINE CORD W O SHIPPING KIT 0 950 00 MANUAL PACKAGE W O SHIPPING KIT CALL STOCKROOM FOR WORK ORDER HIPPING BEFOR NDING TO F G CERT OF CAL PA 214 PRINTED IN PROD 5 5 BEFORE SENDING TO F G S 2510 mm EERE MODEL NEXT ASSEMBLY NEXT PROCESS STEP QTY E USED ON IN PA 804A PACKING LIST W O SHIPPING KIT UNLESS OTHERWISE SPECIFIED odis MC 960A LABEL REAR PANEL W O SHIPPING KIT XK 015 ANG f PPR Ls 2 0025 FRAC 1 64 2510 080 SURFACE MAX oF ae LJ 6 Replaceable Parts 6 2 Replaceable Parts Models 2510 and 2510 AT Introduction This section contains replacement parts information and component layout drawings for the Model 2510 Parts lists The electrical parts lists for the Model 2510 are shown in the 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 Ordering 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 2510 Instrument serial number Part description Component designation if applicable e Keithley part num
26. CR102 CR103 CR104 CR105 CR106 CR107 CR108 CR130 CR109 CR110 CR111 CR112 CR133 CR114 CR115 CR116 CR122 CR129 CR131 CR132 CR117 CR118 CR119 CR120 CR121 F101 HS101 HS105 HS110 J1001 J1003 J1006 J1007 J1008 1101 11014 J102 J1015 K101 K102 L101 L105 L102 L103 L104 L106 L107 L116 L108 L109 L110 L111 L112 L113 L114 L118 L115 L117 L120 L119 L121 L122 L123 L124 L125 PS101 Q101 Q102 Q104 Q119 Q103 Q105 Q106 Q107 Q108 Q109 Q110 Models 2510 and 2510 AT Description ULTRA FAST BRIDGE RECTIFIER EDFIBM ULTRAFAST POWER RECTIFIER DIODE SWITCHING MMBD914 DIODE SWITCHING MMSD914T19 DIODE DUAL HSM 2822T31 DIODE DUAL SWITCHING BAV99L DIODE DUAL COMMON ANODE BAWS6LT2 POLYSWITCH SMD030 2 HEAT SINK CONNECTOR MODULES CONNECTOR HEADER CONN MICRODIN W GND FINGERS CONN D SUB DUAL STACK M F CONN RIGHT ANGLE 24 PIN CONN BERG CONN HEADER STRAIGHT SOLDER PIN LATCHING HEADER FRICTON SGL ROW N C RELAY 1 FORMB AQV214 MINI POWER RELAY DK1A 5V CHOKE 22UH FERRITE BEAD HIGH CURRENT TOROID FERRITE CHIP 600 OHM BLM32A07 EMI SUPPRESSION INDUCTOR CHOKE EMI FERRITE CHIP 600 OHM BLM32A07 CHOKE 100MHZ POWER SUPPLY DC DC CONVERTER TRANS NPN MMBT3904 TRANS PNP MMBT3906L TRANS CHANNEL MOSFET BUZ11 HEXFET POWER MOSFET IRFZ44N Keithley part no RF 123 RF 107 RF 83 RF 112 RF 95 RF 82 RF 98 FU 103 HS 55 CS 834 CS 784 4 CS 792 CS 1072 1 CS 50
27. FH 39 FUSE HOLDER DET o TE PM 1 1B POWER MODULE amp FE 6 FOOT 2 REQ D M3X6MMPFH MILLIMETER PHIL PAN HEAD SCREW 2510 004 WIRE CRIMP ASSEMBLY ATAOE NU 2 NEERUT 2510 2510 051 Front Penel Chassis Assembly 6 S2KEPNUT KEPNUT MODEL NEXT ASSEMBLY EXT PROCESS STEP QTY 6 32X1 4PFH 2 PHIL FLAT HEAD SCREW 3 2 CABLE CLAMP 7 DIMENSIONAL TOLERANCES TITLE MC 285 SERIAL NUMBER MULA UNLESS OTHERWISE SPECIFIED Chassis Power Module Assembl 6 32X5 16PPH PHIL PAN HEAD SCREW KEITHLEY Instruments Inc lg 005 au 1 64 MATERTAL NO 38 2 3 CABLE TIE eu H 25 0 050 Sree re 2 SPACER SURFACE MAX P CABLE CLAMP Gn USE T 7946 lt gt POWER SUPPLY WIRING A 190 0160 ON AIL A PROPERLY INSTALLED TOP VIEW PUSH ROD L SWITCH Im gt PUSH ROD MODULE PRESS UPWARD ON PUSHROD WHILE PUSHING SWITCH SHAFT DOWN DETAIL DISPLAY BO CABLE PLACE RIBBON CABLE IN CABLE CLAMP A PLACE EXCESS RIBBON CABLE TOWARDS FRONT PANEL AND DRESS AWAY FROM CHASSIS REF DIG BOARD 2510 040 FRONT PANEL ASSEMBLY PART NUMBER DESCRIPTION D2N4U9
28. PROT SENS TEMP DATA query allows you request the tem perature sensor calibration parameters Example CAL PROT SENS TEMP 100 5 Calibrate temperature sensor B 8 Calibration Reference Models 2510 and 2510 AT SOURce commands SOURCE CALibration PROTected SOURce CALibration PROTected SOURce DATA Purpose To calibrate the Peltier source sense voltage Format cal prot sour DMM Reading Parameters DMM Reading 3 5 to 12 5 V cal at ES 2 5 to 2 5 V zero cal 3 5 to 12 5 V cal at F S Query cal prot sour data Description The CAL PROT SOUR command calibrates the Model 2510 Peltier source sense voltage During the calibration process this command is sent three times once each with parameters of approximately F S full scale 0 and 5 The actual parameters are voltage readings taken with a precision DMM The CAL PROT SOUR DATA query allows you request the voltage cali bration parameters Example CAL PROT SOUR 8 51 Calibrate with positive voltage AUTO CALibration PROTected SOURce AUTO Purpose To calibrate the voltage source Format cal prot sour auto Description The CAL PROT SOUR AUTO command calibrates the Model 2510 volt age source Disconnect all test leads or equipment from the OUTPUT termi nals before sending this command Example CAL PROT SOUR AUTO Calibrate voltage source Models 2510 and 2510 AT Calibration Reference B 9 DAC commands IPDac CALib
29. RATING OVAC ONZ FOR TIHUED AGAINST FIRE HAZARD FIEPLACE FUSE WITH TYPE AND Model 2510 Sensor measurement accuracy Use the following steps to verify that Model 2510 temperature sensor measurement accu racy is within specified limits This procedure involves connecting characterized resistors to the INPUT terminals and verifying sensor resistance readings are within required limits NOTE The following procedure tests thermistor sensor accuracy and will verify sensor measurement accuracy for all sensor types 1 With the power off connect the 100Q characterized resistor to the Model 2510 INPUT terminals as shown in Figure 1 4 Turn on the Model 2510 and allow it to warm up for one hour before testing 3 Select the Model 2510 voltage function by pressing the V key Models 2510 and 2510 AT Performance Verification 1 12 Figure 1 4 100Q 1kQ 10kQ Connections for sensor or 100kQ Resistor TESISTANCE ACCUTACY INPUT F INPUT S Connect sense S leads as close verification as possible to resistor body INPUT S KEITHLEY IEEE 488 Yer gt o emm TRIGGER 9522 LINK LINE FUSE sLOWBLOW Model 2510 4 Configure the Model 2510 for thermistor sensor type resistance range and 4 wire sense mode as follows e Press CONFIG then T The instrument will display the following CONFIG TEMPERATURE PROTECTION SENSOR TYPE UNITS PID Select SEN
30. V ENTER or EXIT 2 16 Calibration Models 2510 and 2510 AT 44 Press ENTER to complete the shorted calibration step then remove the shorting wires from the INPUT terminals 45 From the TEMPERATURE CAL menu select I SS then press ENTER The unit dis plays the following 1 55 CAL Connect to temperature p gt 4 sensor and press ENTER 46 Connect the DMM and 1kQ resistor to the Model 2510 Figure 2 5 Press ENTER The Model 2510 will display the following RES VALUE 01 00000kQ Use 4 gt ENTER or EXIT 47 Use the EDIT keys to adjust the Model 2510 display to agree exactly with the charac terized 1kQ resistance value then press ENTER The unit will prompt for the DMM voltage reading DMM RDG 0 833330 V Use 4 gt ENTER or EXIT 48 Note the DMM reading then adjust the Model 2510 display to agree with that value Press ENTER 49 From the TEMPERATURE CAL menu select V SS then press ENTER The unit dis plays the following V SS CAL Connect to temperature p gt 4 sensor and press ENTER 50 Make sure the 1k resistor and the DMM are still connected to the Model 2510 INPUT terminals Figure 2 5 51 Press ENTER The Model 2510 will display the following DMM 2 500000V Use 4 gt ENTER or EXIT 52 Note the DMM reading use the EDIT keys to adjust the Model 2510 display to agree exactly with that value then press ENTER The unit will display the followi
31. a block diagram of the analog circuits These circuits are discussed in more detail in the following paragraphs Pulse Class D Output DAC Width Output Filter Modulator H Drive Stage O o OUTPUT U127 L106 Terminals U107 U110 Q107 L107 MI Q110 L115 Source Over TEC Control Current IN Register Limit Sensing be U143 R102 U147 U105 U151 U132 Measure le Sensor Control Signal E Mux pna Register Conditio 4 1 O U134 U124 U136 U149 Digital Control Measure aenal FORMEO Converter Source circuits The Model 2510 source is a digitally controlled class D power amplifier with the output stage in an H bridge configuration U127 is a 16 bit DAC that controls the pulse width modula tor U110 The H drive IC U107 switches the four output FETs Q107 Q110 Output filtering is provided by L106 L107 L115 and associated components Control information for the DAC and H drive circuit is fed through serial to parallel converter U143 The source amplitude voltage is controlled by varying the duty cycle of the pulse width modulator and ultimately the output stage with the digital control information fed to the DAC and the serial to parallel converter For example with a duty cycle of 50 the output is 2 5V The hardware current limit circuit consists of R102 U105 U132 and associated compo nents
32. and 2510 AT 4 12 Troubleshooting As previously discussed source control information from the 68332 processor is fed to the HDAC where it is converted into an analog signal to control the class D amplifier output Power supply Figure 4 8 Power supply block diagram Figure 4 8 shows a block diagram of the Model 2510 power supply system Class D Analog Circuits Power Amplifier 15VA 5 15VA 15VPWR Digital Circuits Constant Frequency Low Noise Floating iio Switching Supply 45VD DC 7 Regulator 5VF V i DC Linen Power Supply Regulator 100 240V AC The integrated switching power supply module provides all power for the instrument while providing universal inputs and power factor correction for the 120 240V line The 15VPWR voltage from the module powers the output stage directly and this supply voltage is further reg ulated to develop a 5VF floating supply voltage and the 5VD digital voltage that powers the digital circuits A constant frequency switching supply also runs off the 15V power module supply and generates the supply voltages for the analog circuits 5 VA and 15 Models 2510 and 2510 AT Troubleshooting 4 13 D
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34. manner not specified the protection provided by the product may be impaired The types of product users are Responsible body is the individual or group responsible for the use and maintenance of equipment for ensuring that the equip ment is operated within its specifications and operating limits and for ensuring 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 circuits Maintenance personnel perform routine procedures on the product to keep it operating properly for example setting the line voltage or replacing consumable materials Maintenance procedures are described in the manual The procedures explicitly state if the operator may perform them Otherwise they should be performed only by service 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 Keithley products are designed for use with electrical signals that are rated Installation Category I and Installation Category II as described in the International Electrotechnical Commission IEC Standard IEC 60664 Most measurement control and data I O signals are Installation Category I and must not be directly connected to mains vol
35. 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 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 Select DISPLAY TESTS and press ENTER to display the following menu FRONT PANEL TESTS KEYS DISPLAY PATTERNS CHAR SET Select CHAR SET and press ENTER to start the character set test Press any key except EXIT to cycle through all displayable characters 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 Models 2510 and 2510 AT Troubleshooting 4 5 Principles of operation The following information is provided to support the troubleshooting tests and procedures covered in this section of the manual Overall block diagram Figure 4 1 shows an overall block diagram of the Model 2510 Circuitry may be divided into three general areas Analog circuits includes source circuits such as the pulse width modulator H drive and class D output stages as well as measurement circuits such as the sensor signal conditioning and A D converter circuits Digital cir
36. place an ASCII 1 in the out put queue when it has completed each step To determine when the OPC response is ready do the following 1 Repeatedly test the 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 When is set a message is available in the output queue and you can read the out put queue and test for an ASCII 1 After reading the output queue repeatedly test MAV again until it clears At this point the calibration step is completed Using the OPC command The OPC operation complete command can be used to detect the completion of each calibration step In order to use OPC to detect the end of each calibration step do the following 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 status from the standard event status register to set the ESB event summary bit in the status byte when operation complete is detected Send the OPC command immediately following each calibration command For example CAL PROT SENS VOLT 8 OPC Note that you must include the semicolon to separate the two commands and that the OPC command must appear on the same line as the calibration command After sending a calibration command repeatedly test the ESB Event Summary bit bit 5 in the status byte until it is s
37. the following command sequence changes the password from the KI002510 remote default to CAL CAL PROT CODE KI002510 CAL PROT CODE CAL You can use any combination of letters and numbers up to a maximum of eight characters NOTE Ifyou change the first two characters of the password to something other than you will not be able to unlock calibration from the front panel Models 2510 and 2510 AT Calibration 2 7 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 reset the password to the fac tory default 002510 front panel 1002510 remote 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 calibration dates and calibration count at any time 1 From normal display press MENU select CAL then press ENTER The unit will dis play the following CALIBRATION UNLOCK EXECUTE VIEW DATES p 2 Select VIEW DATES and then press ENTER The Model 2510 will display the next and last calibration dates and the calibration count as in the following example NEXT CAL
38. with clean copper wire Figure 2 4 Allow one minute for thermal equilibrium then send this command CAL PROT SENS TEMP 0 28 Connect the DMM and the 1kQ resistor to the INPUT terminals Figure 2 5 29 Send the following command to select a solid state current type temperature sensor SENS TEMP TRAN ISS 30 Send the following command with the characterized 1kQ resistance value as the parameter CAL PROT SENS TEMP Resistance Value 31 Note the DMM reading then send that value as the parameter for the following command CAL PROT SENS TEMP DMM Reading 32 Make sure the 1kQ resistor and DMM are still connected to the Model 2510 INPUT terminals Figure 2 5 33 Send the following command to select a solid state voltage type temperature sensor SENS TEMP TRAN VSS 2 26 Calibration Models 2510 and 2510 AT 34 Note the DMM reading then send the following command with the DMM reading value as the parameter to calibrate the current type solid state sensor CAL PROT SENS TEMP lt DMM_Reading gt 35 Short the INPUT terminals with clean copper wire Figure 2 4 Allow one minute for thermal equilibrium then send this command CAL PROT SENS TEMP 0 Step 5 AC ohms calibration 1 Connect the 1000 resistor to the OUTPUT terminals see Figure 2 6 Note that the output will be turned off for the AC ohms calibration step 2 Send the following command with the characterized 1000 resistance value as the com mand par
39. you request the cur rent calibration parameters CAL PROT SENS CURR 1 01 Calibrate current Models 2510 and 2510 AT Calibration Reference B 7 TEMPerature CALibration PROTected SENSe TEMPerature CALibration PROTected SENSe TEMPerature DATA Purpose To calibrate the temperature sensor measurements Format cal prot sens temp Value Parameters Resistor Value 100kQ thermistor 0 to 125e3 Q 10kQ thermistor 0 to 12 5e3 Q 1kQ thermistor 0 to 1 25e3 Q 1000 thermistor 0 to 125 Q 1000 RTD 0 to 125 Q 10000 RTD 0 to 1250 Q VSS OV to 5 V ISS 350 to 1 25e3 Q then 0 01 to 1 5 V Query cal prot sens temp data Description The CAL PROT SENS TEMP command calibrates the Model 2510 tem perature sensor measurements During the calibration process a 1000 1kQ 10kQ or 100kO nominal resistor or a short must be connected to the INPUT terminals and the characterized value a zero value or a voltage reading is sent as the command parameter depending on the calibration step see Section 2 for details The appropriate sensor and range must first be selected with the following commands Enable 4 wire sensing SYST RSEN e Thermistor sensor SENS TEMP TRAN THER e Thermistor range SENS TEMP THER RANG lt Range gt RTD sensor SENS TEMP TRAN RTD RTD range SENS TEMP RTD RANG Range ISS sensor SENS TEMP TRAN ISS VSS sensor SENS TEMP TRAN VSS The CAL
40. 02 15 2001 Last calibration 02 15 2000 Count 0001 Calibration errors The Model 2510 checks for errors after each 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 appropriate error message see Appendix B The unit will then prompt you to repeat the cali bration 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 SYST ERR query The Model 2510 will respond with the error number and a text message describing the nature of the error See Appendix B for details 2 8 Calibration Models 2510 and 2510 AT Aborting calibration steps To abort a calibration step from the front panel press the EXIT key To abort a calibration step via remote send the ABORt command Front panel calibration The front panel calibration procedure described below calibrates all functions Note that each function is separately calibrated and the procedure must be performed in the order shown Step 1 Prepare the Model 2510 for calibration 1 Turn on the Model 2510 and the digital multimeter and allow them to warm up for at least one hour before performing calibra
41. 06 5V 5 5 Referenced to U104 pin 2 9 07 5V 5 5VRF Referenced to U104 pin 2 Digital circuitry checks 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 RAM OK ROM OK Verify that RAM and ROM are functional 2 U163 pin 19 Digital common common All signals referenced to digital common 3 U163 pin 7 5V Digital logic supply 4 U163 pin 68 Low on power up then goes high MPU RESET line 5 0163 0 19 Check for stuck bits MPU address bus 6 U163 DO D15 Check for stuck bits MPU data bus 7 U163 pin 66 16 78MHz MPU clock 8 U166 pin 7 Pulse train during RS 232 I O RS 232 TX line 9 U166 pin 8 Pulse train during RS 232 I O RS 232 RX line 10 0167 pins 34 42 Pulse train during IEEE 488 I O IEEE 488 data bus 11 UI167 pins 26 31 Pulses during IEEE 488 I O IEEE 488 command lines 12 U167 pin 24 Low with remote enabled TEEE 488 REN line 13 U167 pin 25 Low during interface clear TEEE 488 IFC line 14 1163 pin 43 Pulse train D_ADDATA 15 U163 pin 44 Pulse train D_DATA 16 U163 pin 45 Pulse train D_CLK 17 0163 pin 47 Pulse train D_STB Models 2510 and 2510 AT Troubleshooting 4 17 Analog circuitry checks Table 4 4 summarizes analog circuitry checks All measurements are with th
42. 1 CS 339 CS 368 16 CS 724 3 RL 176 RL 249 CH 66 22 CH 91 CH 103 1 CH 62 CH 84 CH 57 CH 62 CH 50 PS 76 1A TG 238 TG 244 TG 211 TG 354 Models 2510 and 2510 AT Replaceable Parts 6 5 Table 6 1 cont Mother board parts list Keithley Circuit designation Description part no Q111 Q116 Q117 TRANS P CHAN MOSFET TP0610T TG 259 0112 0113 0114 0115 0120 0121 0122 0123 TRANS N MOSFET 0605 TG 243 Q124 Q125 Q126 Q127 TRANS N MOSFET VN0605T TG 243 R101 R103 R104 R105 R188 RES 10 5 125MW METAL FILM R 375 10 R102 RES 02 1 5W 1 R 468 02 R107 R198 R200 RES 20K 1 100MW THICK FILM R 418 20K R112 R113 RES 200K 1 125MW METAL FILM R 391 200K R114 115 106 123 208 135 136 130 157 143 RES 1 100MW THICK FILM R 418 1K R116 R117 R150 R161 R162 R199 R209 R221 RES 475 1 1OOMW THICK FILM R 418 475 RII9 RIIS RIAI RES 30 1K 196 100MW THICK FILM R 418 30 1K R120 R142 RES 24 3 1 100 THICK FILM R 418 24 3 R121 RES 3 01K 1 100MW THICK FILM R 418 3 01K R122 RES 1 74K 1 100MW THICK FILM R 418 1 74K R124 R126 R307 RES 0499 1 1 OOMW THICK FILM R 418 0499 R125 127 131 165 151 152 168 169 171 RES 10K 1 100MW THICK FILM R 418 10K R132 R311 RES 7 5K 1 1000MW THICK FILM R 418 7 5K R133 RES 51 5 125MW METAL FILM R 375 51 R134 R137 R201 R306 RES 200 1 100MW THICK FILM R 418 200 R138 R139 R316 RES 5 11K 1 100MW THICK FILM R 418 5 11K R146 147 167 177 178 202 216 217 218
43. 1 Output Vs Excitation 9 2 50 833 uA 2 5 mA 833 pA 100 pA 33 HA 13 5V 2 5 Compliance Nominal Resistance Range 0 250 Q 833 uA max 833 uA 15 75 V max 0 2 50 0 1kQ 0 10 0 80 0 200 Excitation Accuracy 2 9 32 996 42 9 42 9 42 9 32 996 12 2 9 Nominal Sensor Temperature Range 50 to 250 C 50 to 250 C 50 to 250 C 50 to 250 C 50 to 250 C 50 to 250 C Sensor Coefficients p a p A B C A B C A B C A B C Measurement Accuracy rdg offset 40 to 100 C Slope amp offset 40 to 100 C Slope amp offset 0 04 0 07 Q 0 04 0 40 0 04 0 0701 0 00404 Q 0 02 30 0 04 210 0 03 100 nA 0 03 500 uV THERMISTOR MEASUREMENT ACCURACY Nominal Thermistor Accuracy vs Temperature Resistance 0 C 25 C 50 C 100 C 100 Q 0 021 C 0 035 C 0 070 C 0 27 C 1kQ 0 015 C 0 023 C 0 045 C 0 18 C 10kQ 0 006 C 0 012 C 0 026 C 0 15 C 100kQ 0 009 C 0 014 C 0 026 C 0 13 C OPEN SHORTED ELEMENT DETECTION SOFTWARE LINEARIZATION FOR THERMISTOR AND RTD COMMON MODE VOLTAGE 30VDC COMMON MODE ISOLATION gt 10 Q lt 1000pF MAX VOLTAGE DROP IN INPUT FORCE LEADS 1 volt MAX SENSE LEAD RESISTANCE 1000 for rated accuracy SENSE INPUT IMPEDANCE gt 1 1080 GENERAL NOISE REJECTION SPEED NPLC CMRR Normal 1 00 90 dB SOURCE OUTPUT MODES Fixed DC level PROGRAMMABILITY IEEE 488 SCPI 1995 0 RS 232 3 user defina
44. 12 Press ENTER The Model 2510 will display the following RES VALUE 01 00000kQ Use 4 gt A V ENTER or EXIT 13 Use the EDIT keys to adjust the Model 2510 display to agree exactly with the charac terized 1kQ resistance value then press ENTER The unit will display the following THERMISTOR CAL Connect a Short to temperature p 44 sensor and press ENTER 14 Short all four INPUT terminals together using clean copper wire see Figure 2 4 Allow one minute for thermal equilibrium 15 Press ENTER The Model 2510 will display the following RES VALUE 00 00000Q Use 4 P A V ENTER or EXIT 16 Press ENTER to complete the shorted calibration step then remove the shorting wires from the INPUT terminals 2 14 Calibration Models 2510 and 2510 AT 17 From THERMISTOR CAL menu select 10kQ then press ENTER The unit will display the following THERMISTOR CAL Connect to temperature p sensor and press ENTER 18 Connect the 10kQ resistor to the Model 2510 INPUT terminals Figure 2 3 19 Press ENTER The Model 2510 will display the following RES VALUE 010 0000kQ Use 4 gt A V ENTER or EXIT 20 Use the EDIT keys to adjust the Model 2510 display to agree exactly with the charac terized 10kQ resistance value then press ENTER The unit will display the following THERMISTOR CAL Connect a Short to temperature p sensor and press ENTER 21 Short all four INPUT terminals together using
45. 219 RES 1K 1 100MW THICK FILM R 418 1K R148 R149 R255 R256 R257 R279 R284 RI40 RES 2 21K 1 1000MW THICK FILM R 418 2 21K R153 RES 49 9K 1 100MW THICK FILM R 418 49 9K R154 RES 1 28M 1 1 8W METAL FILM R 176 1 28M R159 RES 4 99K 1 125mW METAL FILM R 391 4 99K R160 RES 100K 1 100MW THICK FILM R 418 100K R163 RES 2 49K 1 125MW METAL FILM R 391 2 49K R164 RES 20K 1 1 10W METAL FILM R 263 20K R170 RES 2 49K 1 125MW THIN FILM R 456 2 49K R172 RES 10K 1 125W THIN FILM R 456 10K R173 RES 249K 1 125W THIN FILM R 456 249K R174 RES 27 7K 1 125W THIN FILM R 456 27 7K R175 RES 10K 1 1 10W METAL FILM R 263 10K 6 6 Replaceable Parts Models 2510 and 2510 AT Table 6 1 cont Mother board parts list Keithley Circuit designation Description part no R176 RES 1K 1 1 10W METAL FILM R 263 1K R179 RES 100K 1 1 10W METAL FILM R 263 100K R180 RES 34K 1 100MW THICK FILM R 418 34K R181 R248 R254 R270 RES 4 75K 1 100MW THICK FILM R 418 4 75K R182 RES 82 5 1 100MW THICK FILM R 418 82 5 R183 R293 R295 R297 R299 R301 R303 RES 5 11K 1 100MW THICK FILM R 418 5 11K R184 RES 470 5 125MW METAL FILM R 375 470 R185 189 239 294 296 298 300 302 304 RES 100 1 100MW THICK FILM R 418 100 R186 RES 6 65K 1 1 10W METAL FILM R 263 6 65K R187 RES NET TF 245 R190 R191 R192 R193 R194 R195 R196 R197_ RES 5 11K 1 100MW THICK FILM R 418 5 11K R203 RES
46. 4 5000A as determined from the DMM voltage reading and resistor value Compute the current as follows I V R where V is the DMM voltage reading and R is the characterized value of the 1Q resistor 7 Verify that the current calculated in step 7 is within 4 474 to 4 526A limits 8 Repeat steps 6 and 7 for an output current of 4 5000A Qn cota 9 Models 2510 and 2510 AT Performance Verification 1 10 Current limit accuracy Follow the steps below to verify that Model 2510 current limit accuracy is within specified limits The test involves setting the current limit to a specific value and making sure the current is limited to the required value 1 10 With the power off connect the digital multimeter and 1Q resistor to the Model 2510 OUTPUT terminals as shown in Figure 1 2 Turn on the Model 2510 and the DMM and allow them to warm up for one hour Select the multimeter DC voltage measuring function and set the unit to the 20V range Press the Model 2510 V key to select the voltage function Press CONFIG then I select PROTECTION then set the current limit to 4 50A Make sure the source output is turned on Using the EDIT keys adjust the Model 2510 output voltage to 10 000V Verify that the ILIM message is displayed then measure the output current as determined from the DMM voltage reading and resistor value Compute the current as follows I V R where V is the DMM voltage read
47. 5 to 10 005kQ 100kQ 100kQ 99 939 to 100 061kQ 1 Nominal resistance values 2 Reading limits based on Model 2510 1 year accuracy specifications and nominal resistance values Recal culate reading limits using actual characterized resistance values and Model 2510 1 year accuracy specifi cations See Verification limits earlier in this section for details Calibration 2 2 Calibration Models 2510 and 2510 AT Introduction Use the procedures in this section to calibrate the Model 2510 These procedures require accurate test equipment to measure precise DC voltages and resistances Calibration can be performed 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 The information 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 Environmental conditions Temperature and relative humidity Conduct the calibration procedures at an ambient temperature of 18 28 C 65 82 F with relative humidity of less than 70 unless otherwise noted Warm up period Allow the Model 2510 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 tempe
48. 6 5 gt eH S y Ez HA i N N N N EE ics _ 185 ru ura R245 7 MEUS U102 LUZ 0115 R264 58281 bcd x 5 0000000000000000 Oe gt 6 2 4 0114 2 0119 j e C183 02030000000 UE C287 F101 4 103 149 J R184 LH ARMIS USED ES 3 cong 01669777 C285 m L103 4 C504 2 5 R183 LOS 2 gen S TP105 C135 EAD 7 eee R313 128 z TP122 U129 R182 n2 E SES 95 1 U128 8 a c3 XT Cy an gt R290 7 KI_GNDA2 0241 ei 5 e C290 x 52 c3 m Sine LQ co Gu S ci O TP102 EX UE 9 va p 67 9125 11 R303 gt 4 Mt R122 C122 120 180 3 10000000 127 1 5 123 C155 5VRF C182 lt gt PE 02701217 R119 Riel 123 R305 113 1127 2 c 210124 C127 T 1732 EX U132 o 0000000 ais 0165 R289 aP 2 9 Vv 9 SA o 010 a G S U138 77 5 e EO EL E CR126 571 2 zO amp ES sles NO cs 5 Sees C200 R188 C216 C254 U159 R288 0123 amp o co Riis C130 c l_ cio9 6214 a 0158 ca ca R12 R165 s 9 8 05 R234 2 dt N C296 6125 128 181 O
49. AD PRINT 1 ENTER 16 INPUT 2 Reading RETURN EndProg BEEP PRINT Calibration aborted PRINT 1 OUTPUT 15 CAL PROT LOCK PRINT 1 OUTPUT 15 RST PRINT 1 LOCAL 15 16 Get reading from DMM Close files end program CLOSE END CmdList Calibration command list DATA OUTP ON SOUR VOLT 8 5 CAL PROT SENS VOLT CAL PROT SO DATA SOUR VOLT 0 CAL PROT SENS VOLT CAL PROT SO DATA SOUR VOLT 8 5 CAL PROT SENS VOLT CAL PROT SOUR OUTP OFF DATA OUTP ON CAL PROT SENS CURR DATA SENS TEMP THER RANG 100 CAL DATA SENS TEMP THER RANG 1E3 CA DATA SENS TEMP THER RANG 1E4 CAI DATA SENS TEMP THER RANG 1E5 CA DATA SENS TEMP RTD RANG 1E3 CAL DATA CAL PROT RES OUTP ON DATA SYST RSEN ON SENS TEMP TRAN THER CAL PROT IPD OUTP OFF PROT SENS TEMP CAL PROT SENS TEMP 0 L PROT SENS TEMP CAL PROT SENS TEMP 0 L PROT SENS TEMP CAL PROT SENS TEMP 0 L PROT SENS TEMP CAL PROT SENS TEMP 0 DATA SENS TEMP TRAN RTD SENS TEMP RTD RANG 100 DATA CAL PROT SENS TEMP CAL PROT SENS TEMP 0 PROT SENS TEMP CAL PROT SENS TEMP 0 DATA SENS TEMP TRAN ISS CAL PROT SENS TEMP CAL PROT SENS TEMP DATA SENS TEMP TRAN VSS CAL PROT SENS TEMP CAL PROT SENS TEMP 0 DATA CAL PROT SOUR AUTO OUTP OFF Index Aborting calibration steps 2 8 AC resistance accu
50. C178 2 E X 12 09 0 111 C289 gt Xm L lt 0105 101 9106 R138 11000000 MICRO 5105 R139 C176 y CLK e mum C218 Ri41 DF C175 232 3 e Pd C235 C236 S NN 40 Re R239 8254 5 06 x o 0167 O00000000I m 0115 114 2 1 IMU EY E R161 LI 1 gt o T R142 617 nos R163 N 5 R270 SS yel cR 55 TP108 1221119 E S E C294 0170 75 75 o H Y102 e REFA D b EN e fe d m C T i pee 1725 S ie O gt C L M106 246 ES E C145 NU Re RO 2 22 168 cise UUU TP110 VR105 Ec c228 m _ C1 bi cise 5 200000000007 uw uw EN OO o C221 N ES R269 U168 zc al C144 8 C226 as 288 50168 8 8541 R251 Em P o Sas L x Oa R157 R159 SS nese amp R250 ES R268 a U169 5j 2 mE lt CR102 142 Tog R249 Mo 293 L104 C219 143 R554 vRi04TP109 R248 o c ca O TP106 ee ee ues R247 R265 amp c E gt 3 cs g R590 c c R24
51. EMP Resistance Value CAL PROT TEMP 0 SENS TEMP TRAN ISS CAL PROT TEMP Resistance Value DMM Reading SENS TEMP TRAN VSS CAL PROT ITEMP DMM Reading CAL PROT TEMP 0 CAL PROT RES Resistance Value ON CAL PROT SOUR AUTO OUTP OFF 1000 to INPUT Figure 2 3 Short to INPUT Figure 2 4 1kQ to INPUT Figure 2 3 Short to INPUT Figure 2 4 10kQ to INPUT Figure 2 3 Short to INPUT Figure 2 4 100kQ to INPUT Figure 2 3 Short to INPUT Figure 2 4 1000 to INPUT Figure 2 3 Short to INPUT Figure 2 4 10000 to INPUT Figure 2 3 Short to INPUT Figure 2 4 1kQ DMM to INPUT Figure 2 5 1kQ DMM to INPUT Figure 2 5 Short to INPUT Figure 2 4 1000 to OUTPUT Figure 2 6 None open OUTPUT Models 2510 and 2510 AT Calibration 2 23 Step 2 Voltage calibration 1 10 11 Connect the DMM to the Model 2510 OUTPUT terminals as shown in Figure 2 1 Select the DMM DC voltage function and enable auto range Send this command to turn on the output OUTP ON Send the following command to output 8 5V SOUR VOLT 8 5 Note and record the DMM reading and then send that value as the parameter for the following commands CAL PROT SENS VOLT DMM Reading CAL PROT SOUR DMM Reading For example if the DMM reading is 8 51V the correct commands are CAL PROT SENS VOLT 8 51 CAL PROT SOUR 8 51 Send t
52. ENTER The unit will display the following THERMISTOR CAL Connect a Short to temperature p sensor and press ENTER 7 Short all four INPUT terminals together using clean copper wire as shown in Figure 2 4 Allow one minute for thermal equilibrium Models 2510 and 2510 AT Calibration 2 13 Figure 2 4 Short INPUT Terminals Shorted input with Clean Copper Wire calibration connections WARNIJG wo INTERNAL OPERATOR SERVICABLE PARTS SERVICE BY QUALIFIED PERSONNEL ONLY cum w eve scm n d cof us ENABLE DIG 1 0 TRIGGER LINE FUSE SLOWBLOW 25 250V A une S00 240VAC 50 60 Hz WA i s CAUTION ron CONTINUED PROTECTION AGAINST FIRE HAZARD REPLACE FUSE WITH SAME TYPE AND RATING j Model 2510 NOTE The characterized 1Q resistor can be used in place of the shorted INPUT terminals if desired Enter the characterized value of the 1Q resistor at the RES VALUE prompt 8 Press ENTER The Model 2510 will display the following RES VALUE 00 000009 Use 4 P V ENTER or EXIT 9 Press ENTER to complete the shorted calibration step then remove the shorting wires from the INPUT terminals 10 From the THERMISTOR CAL menu select 1kQ then press ENTER The unit will dis play the following THERMISTOR CAL Connect 1kQ to temperature p gt 44 sensor and press ENTER 11 Connect the 1kQ resistor to the Model 2510 INPUT terminals see Figure 2 3
53. IC CAP 1UF 20 50V CERAMIC CAP 2 2UF 20 100V ALUM ELEC CAP 100UF 20 16V TANTALUM CAP 33PF 10 100V CERAMIC DIODE SWITCHING 250MA BAV 103 DIODE SWITCHING MMBD914 VACUUM FLUORESCENT DISPLAY CONN BERG CONN HEADER STRAIGHT SOLDER PIN TRANS NPN GEN PURPOSE BC868 RES NET 15K 2 1 875W RES 13K 5 125MW METAL FILM RES 4 7K 5 250 MW METAL FILM RES 1M 5 125MW METAL FILM RES 1K 5 250MW METAL FILM RES 240 5 250MW METAL FILM RES 10M 5 125MW METAL FILM TRANSFORMER TDK ER14 5 SERIES IC LATCHED DRIVERS UCN 5812EPF 1 PROGRAMMED ROM IC 32 BIT SERIAL UCN5818EPF 1 DIODE ZENER 8 2V MMBZ5237 CRYSTAL 4MHZ Keithley part no C 417 22 C 436 1 C 418 1 C 503 2 2 C 504 100 C 451 33P RF 89 RF 83 DD 51C CS 339 CS 368 16 TG 293 TF 219 15K R 375 13K R 376 4 7K R 375 1M R 376 1K R 376 240 R 375 10M TR 300 732 7001 800 830 DZ 92 CR 36 4M 6 9 Order current revision level for example 7001 800A02 6 10 Replaceable Parts Models 2510 and 2510 AT Table 6 3 Miscellaneous parts list Qty Description Keithley part no 1 BEZEL REAR 428 303D 1 CHASSIS 2510 301A 1 CONDUCTIVE RUBBER SWITCH 2510 315A 1 COVER 2510 307A 1 DISPLAY LENS 2510 311B 1 FAN FN 39 1 2 FOOT 428 319A 2 FOOT EXTRUDED FE 22A 2 FOOT RUBBER FE 6 1 FUSE HOLDER FH 39 1 FUSE EXP 2 5 5X20MM FU 106 2 5 1 HANDLE 428 329F 1 LENS LED 6517 309B 1 LINE CORD CO 7 1 LINE MODULE
54. ISE SPECIFIED 1 Chassis Assembly OP6 FA 232 1C 2 CAPTIVE PANEL SCREW XX 015 ANG xf MC 233A LABEL WARNING KEITHLEY ie eee d 905 Frac MATERIAL NO 22 SURFACE MAX 7 FINISH L 090 0162 NO REVISI N ENG DATE vor E 26169 OPTP 950 00 Was 2510 900 00 804 Was PA 79IA Recommended Procedure 2510 052 CHASSIS ASSEMBLY Turn the UUT ON 2 Verify all display segments and annunciator turn ON for a few seconds 3 Verify Firmware Rev 4 Verify GPIB Address 15 5 Wait until front panel displays all numbers To change GPIB Address Press MENU 2 Using the Left and Right Arrow Keys Select COMMUNICATION and Press ENTER 3 Using the Left and Right Arrow Keys Select GPIB and Press ENTER 4 Using UP and DOWN Arrow Keys Set Address to 15 and Press ENTER 5 To EXIT Press EXIT PERFORM HIPOT TEST PER MS 1537 TO IEC VOLTAGE SPEC NOTE UNIT IS TO BE SHIPPED WITH GREEN MASK ON THE LENS PART NUMBER QTY DESCRIPTIO PLACE CERTIFICATE OF CALIBRATION ON TOP OF UNIT THEN PLACE INTO PO 14 4 2510 052 CHASSIS ASSEMBLY CHIPLOC BAG AND SEND WITH W O SHIPPING KIT ITEMS TO AUDIT 0 14 4 CHIPLOC BAG
55. Models 2510 and 2510 AT TEC SourceMeter Service Manual ment NET An Interworld Highway LLC Company MEASUR SOME ONFIDENCE WARRANTY Keithley Instruments Inc warrants this product to be free from defects in material and workmanship for a period of year from date of shipment Keithley Instruments Inc warrants the following items for 90 days from the date of shipment 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 Keithley s express written consent or misuse of any product or part This warranty also does not apply to fuses software non rechargeable batteries damage from battery leakage or problems arising from normal wear or failure to follow instructions THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRE
56. N 2510 050 CHASSIS POWER MODULE ASSEMBLY 2510 040 FRONT PANEL ASSEMBLY 2510 100F DIGITAL BOARD ASSEMBLY A CS H3 IEEE HARDWARE KIT 2 4 SCREWLOCK FEMALE 2001 320A PUSH ROD 4 40X1 4PPH 3 PHIL PAN HEAD SCREW ST 166 21 STA DOFF DIGITAL BOARD ASSEMBLY D3 25950 2510 100 Was 2510 100 ST 10 30 01 TR NO REVISION ENG DATE 04 26175 12510 100 1 Was 2510 100E D 25369 DEL CA 239 1A8 2510 1000 ST 1712701 DI 25302 2510 10001 WAS 2510 100D Si 275 01 D2 25168 2510 100E Was 2510 10001 ST 110 30 01 Nu 4 40X HL 4PPH e RS 3 REQ D 5 IN LBS S FROM FAN AX DAN SEE DETAIL B 2001 320A PUSH ROD 2510 100F FROM POWER SUPPLY SEE DETAIL A S S CS Sa DE 2910 050 T 166 21 TANDOFF 6 IN 155 FROM FRONT PANEL CS 725 SCREWLOCK FEMALE EE HARDWARE KIT 7 IN LBS 4 REQ D 4 IN LBS CHASSIS POWER MODULE ASSEMBLY 2510 2510 05 Chassis Assembly 2510 Tech Tech MODEL NEXT ASSEMBLY NEXT PROCESS STEP QTY DIMENSIONAL TOLERANCES PONG SARE Stade UNLESS OTHERWISE SPECIFIED XX 015 ANG f Keithley Instruments Inc t KEITHLEY 44139 XXX gt 005 FRAC gt 1 64 SURFACE MAX Wa G
57. N oL j 23 0126 fe w101 2 Ln C106 j ope O Ol M104 m 5 Oo D V T M01 37 MODEL NEXT ASSEMBLY USED ON MC 612 LABEL 2510 102 r 0612 FED A DATE e791 790 SCALE 2 5 M A N IN NLESS O WISE NOTED 5 21 99 3 2 COMDONEN AV K z Y DIM ARE IN IN UNLESS OTHER E NOTED UE TITLE COMPONENT LAYOUT DIM TOL UNLESS OTHERM SPECIFIED Ags APPR MOTHER BOARD KEITHLEY INSTRUMENTS INC F a T X X 0 ANG m oa i uu PEE NU CLEVELAND OHIO 44139 DONE aat eru A DO NOT SCALE THIS DRAWING 4 3 x PG 1 OF 1 A Lee lt FE 27 2 PLACES 05901 APE ETWEEN 12 B 521244 MOUNTED DS901 AND 2400 112 MOUNTED ON SIDE E Eco NO REUISION 17908 RELERSED 20811 MOVED DISPLAY 20MILS INWARD CHG D ARTWORK FROM REV D TO ADDED C917 J1034 TO BE USED ON MODEL 2436 ONLY IS 01 DISPLAY SEE DETAIL A e e PLACES aO 2400 112 Ty C901
58. NS TEMP 0 15 Connect the 100kQ resistor to the Model 2510 INPUT terminals Figure 2 3 Models 2510 and 2510 AT Calibration 2 25 16 Send this command to select the 100kQ resistance range SENS TEMP THER RANG 1 5 17 Send the following command with the characterized 100kQ resistance value as the parameter to calibrate the 100k range CAL PROT SENS TEMP Resistance Value 18 Short the INPUT terminals with clean copper wire Figure 2 4 Allow one minute for thermal equilibrium then send this command CAL PROT SENS TEMP 0 19 Connect the 100Q resistor to the INPUT terminals Figure 2 3 20 Send the following command to select the RTD type temperature sensor SENS TEMP TRAN RTD 21 Send this command to select the 1000 range SENS TEMP RTD 100 22 Send the following command with the characterized 1000 resistance value as the parameter to calibrate the RTD measurement function CAL PROT SENS TEMP Resistance Value 23 Short the INPUT terminals with clean copper wire Figure 2 4 Allow one minute for thermal equilibrium then send this command CAL PROT SENS TEMP 0 24 Connect the 10000 resistor to the INPUT terminals Figure 2 5 25 Send this command to select the 10000 range SENS TEMP RTD RANG 1000 26 Send the following command with the characterized 10000 resistance value as the parameter to calibrate the RTD measurement function CAL PROT SENS TEMP Resistance Value 27 Short the INPUT terminals
59. OW NOISE LT1007CS8 1 949 0149 1357 0155 0158 0154 HCPL0631 1153 0156 0157 HIGH SPEED COUPLER 1225 U159 U165 IC POS NAND GATES INVERT 74HCT14 IC 656 U160 IC 64KX16 BIT CMOS STATIC RAM LSI 215 1 0161 2 INPUT EXCLUSIVE OR GATE NC7SZ86 IC 1180 U163 IC MICROCONTROLLER MC68332 FC LSI 161 U164 IC PROTECTED QUAD POWER DRIVERS IC 1212 U166 IC 45V RS 232 TRANSCEIVER MAX202 IC 952 U167 IC GPIB ADAPTER 9914A LSI 123 U168 PROGRAMMED ROM 2510 800 U169 IC OCTAL INTER BUS TRANS 75161 IC 647 U170 IC OCTAL INTERFACE BUS 75160 IC 646 U171 U137 IC 2 INPUT OR GATE IC 1206 U173 IC CURRENT SOURCE LM334H IC 421 U174 IC CENTIGRADE TEMP SENSOR LM35DZ 933 VR103 VR104 DIODE ZENER 6 2V MMSZ6V2 DZ 97 VR105 DIODE DZ 127 VR106 DIODE ZENER 30V BZX84C30 DZ 106 30 W101 W102 JUMPER 300 J 7 1 Y101 OSCILLATOR HIGH SPEED CMOS 12MHZ CR 37 Y102 CRYSTAL FSM327 CR 41 Order current firmware revision for example 2510 800A01 Models 2510 and 2510 AT Table 6 2 Display board parts list Circuit designation C901 C902 C904 C907 C908 C910 C903 C905 C906 C909 C911 C912 C913 C914 C915 C916 CR901 CR902 CR903 CR904 CR905 CR906 DS901 J1032 J1033 Q901 Q902 R901 R902 R903 R904 R905 R906 R907 R908 T901 U901 U904 U905 U902 U903 VR901 Y901 Replaceable Parts Description CAP 22UF 20 6 3 TANTALUM CAP 1UF 20 100V CERAM
60. PM 1 1B 1 MATING INPUT OUTPUT CONNECTOR CS 846 1 MEMBRANE SWITCH FRONT PANEL 6430 313A 1 MODIFIED FRONT PANEL 2510 308A 1 MOUNTING EAR LEFT 428 338B 1 MOUNTING EAR RIGHT 428 328E 1 OVERLAY FRONT PANEL 2510 309A 2 PC BOARD STOP 2001 371A 1 POWER ROD 2001 320A 1 POWER SUPPLY PS 77 1A 1 REAR PANEL 2510 303A
61. PPR eT RE USED ON Front Panel Chassis Assembly 251499035 LTR ECA NO REVISION ENG DATE 250 0162 232 1 CAPTIVE PANEL SCREW A 24008 Released ST 1 5 00 2 REQ D 5 IN LBS 428 303D REAR BEZEL 24 NOTE ORIENTATION OF WORDING 2510 307A COVER eg 4 40x 1 4PFHUC STEP Z 4 REQ D 5 IN LBS MC 615A amp MC 233A DO NOT TIGHTEN UNTIL SEE DETAIL A REAR BEZEL IS INSTALLED 2510 051 FRONT PANEL CHASSIS ASSEMBLY 408 3388 MOUNT NG e EAR LEFT 74 428 328 MOUNTING i EAR RIGHT ORIENTATION we FA 230 2B 8 SCREW 2 REQ D 7 IN LBS DETAIL A EFE 22A FOOT 2 REQ D MC 615A WARNING LABEL REAR OF UNIT MC 233A WARNING LABEL PART NUMBER QTY DESCRIPTION 2510 051 FRONT PANEL CHASSIS ASSEMBLY X 2510 3074 COVER 428 3286 MOUNTING EAR RIGHT 18 3386 MOUNTING SEARS LEFT 2510 2510 080 Final Inspection FE 22A 2 FOOT BOTTOM CHASSIS COVER REF MODEL NEXT ASSEMBLY NEXT PROCESS STEP QTY MC 615A WARNING LABEL USED ON 4 40x1 4PFHUC 4 PHIL FLAT HEAD UNDERCUT SCREW E MENS ONAL TOL ERENCES 428 3030 REAR BEZEL PISNO UM S RS UNLESS OTHERW
62. PROTected SENSe VOLTage DATA Purpose Format Parameters Query Description Example CURRent Models 2510 and 2510 AT To calibrate the Peltier voltage measurement cal prot sens volt DMM Reading DMM Reading 3 5to 12 5 V 2 5 to 2 5 V at ES zero cal 3 5 to 12 5 V cal at ES cal prot sens volt data The CAL PROT SENS VOLT command calibrates the Model 2510 Peltier voltage measurement During the calibration process this command is sent three times once each with parameters of approximately ES 0 and E S The actual parameters are voltage readings taken with a precision DMM The CAL PROT SENS VOLT DATA query allows you to request the Pelt ler voltage calibration parameters CAL PROT SENS VOLT 8 51 CALibration PROTected SENSe CURRent CALibration PROTected SENSe CURRent DATA Purpose Format Parameters Query Description Example To calibrate the current measurement Calibrate positive voltage cal prot sens curr Resistor Value Resistor Value 0 5 to 1 5 Q cal prot sens curr data The CAL PROT SENS CURR command calibrates the Model 2510 current measurement During the calibration process 19 nominal resistor must be connected to the OUTPUT terminals and the source is automatically set to 4 5V OV and 4 5V The command parameter is the characterized value of the 1Q resistor The CAL PROT SENS CURR DATA query allows
63. SOR TYPE and then press ENTER The following will be displayed SENSOR TYPE THERMISTOR RTD 1 55 V SS Select THERMISTOR and then press ENTER The following will be displayed THERMISTOR SETTINGS RANGE A B C I SRC gt Select RANGE then press ENTER The unit displays THERMISTOR RANGE 100 1K 10K 100K Select 100 then press ENTER From the THERMISTOR SETTINGS menu choose SENSE MODE then press ENTER From the SENSE MODE menu choose 4 WIRE then press ENTER e Press EXIT as required to return to normal display 5 Repeatedly press the DISPLAY TOGGLE key until the sensor resistance RT is dis played on the lower display line on the right For example RT 099 98Q 6 Verify that the sensor reading for the 100Q resistance in Table 1 3 is within stated limits 1 13 Performance Verification Models 2510 and 2510 AT NOTE reading limits in Table 1 3 are based on nominal resistance values Recalculate new limits based on characterized resistance values and Model 2510 one year ther mistor sensor accuracy specifications see Appendix A 7 Repeat steps through 5 for the remaining resistance values in Table 1 3 Be sure to select the correct resistance range from the THERMISTOR RANGE menu Table 1 3 Sensor resistance measurement accuracy limits Model 2510 sensor reading limits Sensor range Test resistance 1 year 18 C 28 C 100Q 100Q 99 89 to 100 110 1kQ 1kQ 0 9992 to 1 0008kQ 10kQ 10kQ 9 99
64. SSED OR IMPLIED INCLUD ING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS 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 CONSEQUENTIAL 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 DAM AGES 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 PROPERTY KEITHLEY Keithley Instruments Inc 28775 Aurora Road Cleveland Ohio 44139 440 248 0400 Fax 440 248 6168 1 888 KEITHLEY 534 8453 www keithley com Sales Offices BELGIUM Bergensesteenweg 709 B 1600 Sint Pieters Leeuw 02 363 00 40 Fax 02 363 00 64 CHINA Yuan Chen Xin Building Room 705 12 Yumin Road Dewai Madian Beijing 100029 8610 6202 2886 Fax 8610 6202 2892 FINLAND Tiet j ntie 2 02130 Espoo Phone 09 54 75 08 10 Fax 09 25 10 51 00 FRANCE 3 all e des Garays 91127 Palaiseau C dex 01 64 53 20 20 Fax 01 60 11 77 26 GERMANY Landsberger Strasse 65 82110 Germering 089 84 93 07 40 Fax 089 84 93 07 34 GREAT BRITAIN Unit 2 Commerce Park Brunel Road Theale Berkshire RG7 4AB 0118 929 7500 Fax 0118 929 7519 INDIA
65. The output stage current that flows through R102 develops a voltage that is amplified by U105 and compared with a programmed current limit in 10 bit DAC U132 If the current value exceeds the pre programmed limit the H drive IC is disabled turning off the output stage Class D Amplifier Figure 4 3 shows a simplified schematic of the class D amplifier output stage The DAC converts control information from the processor into an analog signal that controls the pulse width modulator PWM through the H bridge control The IP DAC converts current limit control information from the processor and forms the BRIDGE OFF signal that turns off the output stage in an over current condition 4 7 Troubleshooting Models 2510 and 2510 AT Simplified schematic of class D amplifier Figure 4 3 44039 IN 30 J N oos WIT I N C9 L 1 Ja Lo L80rdIH 99 inim LOE mro MLO E 32 ML 4 8 Troubleshooting Models 2510 and 2510 AT H bridge Figure 4 4 shows a simplified schematic of the H bridge output stage switching as well as the pulse width modulator waveforms The four output stage transistors function as simple switches with the switching phases and duty cycles controlled by the pulse width modulator as shown Figure 4 4 Simplified schematic of H bridge output stage 15V DUT A H Bridge Switching ALO PWM BHI Pulse Input Voltage i 8 Width
66. VOLTAGE REGULATOR IC 1135 U104 IC VOLTAGE REGULATOR IC 1132 U105 U119 IC DUAL FET OPAMP IC 1128 U107 IC 80V 2 5A FULL BRIDGE FET DRIVER IC 1139 U108 U109 U123 IC 2 INPUT AND GATE 1140 U110 IC HIGH SPEED PWM CONTROLLER IC 1119 U113 IC SUPPLY VOLT SUPERVISOR TL7705A IC 860 U114 IC AJD SHUNT REGULATOR TL431CLP IC 677 U115 U150 IC SINGLE TRANSISTOR COUPLER IC 1182 U116 IC HIGH SPEED PWN CONTROLLER IC 1120 0118 VOLT COMPARATOR LM393D IC 775 U120 U124 IC OPA177GS 960 U121 IC PRECISION BIFET OPAMP 1194 0122 DUAL BIPOLAR OP AMP LT1124CS8 IC 955 U125 U172 IC VOLTAGE REFERENCE IC 1065 U126 U130 U131 U152 U153 IC CMOS ANAL SWITCH DG444DY IC 866 U127 IC 5V 16 BIT DAC MAX542ACSD IC 1176 U128 IC VOLT COMPARATOR LM311M IC 776 U129 IC OP AMP NE5534D IC 802 U132 IC 5V 10 BIT DAC MAX515CSA 1331 U133 IC NCHAN LAT DMOS QUADFET SD5400CY IC 893 U134 U135 U136 U143 8 STAGE SHIFT C074HC409AM IC 1026 U138 IC QUAD D FLIP FLOP W CLK RESET IC 923 74 175 U139 U140 IC QUAD 2 IN NOR 74 02 809 U141 IC SERIAL EPROM 24LC16B LSI 153 U142 IC 8 CHAN ANA MULTIPLEXER DG408DY IC 844 U145 PROGRAM 2000 802A02 U146 IC DUAL D TYPE F F 74HC74 IC 773 6 8 Replaceable Parts Models 2510 and 2510 AT Table 6 1 cont Mother board parts list Keithley Circuit designation Description part no U147 U151 IC DIFFERENTIAL AMP INA117P IC 889 U148 IC OP AMP L
67. ameter to calibrate the AC ohms function CAL PROT RES Resistance Value Step 6 Voltage source calibration 1 Disconnect all resistors and test leads from the Model 2510 OUTPUT terminals 2 Turnon the output by sending OUTP ON 3 Send this command to complete voltage source calibration CAL PROT SOUR AUTO 4 Turn off the output by sending OUTP OFF Step 7 Program calibration dates Use following commands to set the calibration date and calibration due date CAL PROT DATE lt yyyy gt mm lt dd gt Calibration date CAL PROT NDUE lt yyyy gt mm lt dd gt Next calibration due date Note that the year month and date must be separated by commas Step 8 Save calibration constants Calibration is now complete so you can store the calibration constants in EEROM by send ing the following command CAL PROT SAVE NOTE Calibration will be temporary unless you send the SAVE command Step 9 Lock out calibration To lock out further calibration send the following command after completing the calibration procedure CAL PROT LOCK 3 Routine Maintenance 3 2 Routine Maintenance Models 2510 and 2510 AT Introduction The information in this section deals with routine type maintenance that can be performed 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 t
68. ation and as shown on the instrument or test fixture panels or switching 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 Ifa screw is present connect it to safety earth ground using the wire recommended in the user documentation The I symbol on an instrument indicates that the user should refer to the operating instructions located in the manual The JA symbol on an instrument shows that it can source or measure 1000 volts or more including the combined 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 war ranty 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
69. atus PRINT 1 OUTPUT 15 ESE 1 SRE 32 Enable OPC and SRQ PRINT 1 OUTPUT 16 SYST PRES Initialize 2002 PRINT 1 OUTPUT 16 FORM ELEM READ 2002 reading data only Y Replace nominal resistor values below with characterized values RS 71 1 ohm value RS 1 100 100 ohm value RS 2 1e3 1k ohm value R 3 1e4 10k ohm value R 4 1 5 100k ohm value CLS PRINT Model 2510 Calibration Program GOSUB KeyCheck PRINT 1 OUTPUT 15 CAL PROT CODE KI002510 Jiss FOR I 1 TO 46 READ Cmd SELECT CASE I CASE 1 PRINT Connect DMM INPUT to 2510 OUTPUT terminals GOSUB KeyCheck CASE 3 4 6 7 9 10 39 41 GOSUB ReadDMM Cmd Cmd Reading CASE 12 PRINT Connect 1 ohm resistor to OUTPUT terminals GOSUB KeyCheck CASE 13 Cmd Cmd RS CASE 19 22 25 28 32 35 IF I 32 THEN J 1 PRINT Connect R J ohm resistor to INPUT terminals GOSUB KeyCheck Cmd Cmd R J 1 Models 2510 and 2510 AT Calibration Program CASE 20 23 26 29 33 36 42 PRINT Short INPUT terminals with clean copper wire PRINT Wait 1 minute GOSUB KeyCheck CASE 38 41 PRINT Connect 1k ohm resistor and DMM to INPUT terminals IF 38 THEN Cmd Cmd R 2 GOSUB KeyCheck CASE 43 PRINT Connect 100 ohm resistor to OUTPUT terminals GOSUB KeyCheck Cmd Cmd R 1 CASE 44 PRINT Disconnect all equipment from OUTPUT
70. ber 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 e 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 circuit boards are provided on the following pages Drawings include Mother board 2510 100 e Display board 2400 110 Models 2510 and 2510 AT Replaceable Parts 6 3 Table 6 1 Mother board parts list Keithley Circuit designation Description part no C101 C102 C204 C205 C206 C207 CAP 6800 20 50 ALUM ELEC C 578 680 C103 C106 2 2U 10 50V TANTALUM 563 2 2 104 105 118 121 122 125 126 127 157 158 CAP 1UF 20 50 CERAMIC C 418 1 C107 109 112 114 135 136 143 152 155 161 CAP 1UF 1096 25V CERAMIC C 495 C110 C113 CAP 033U 1096 50V CERAMIC C 491 033 C111 C128 C188 C189 C192 C194 C290 CAP IUF 2096 35V TANTALUM C 494 1 C115 C175 CAP 2200P 1 50V CERAMIC C 532 2200P C116 C174 CAP 220PF 10 100V CERAMIC C 451 220P C119 C172 C185 100 5 100V CERAMIC C 465 100P C120 CAP 470P 10 100V CERAMIC C 451 470P C123 131 132 133 134 137 138 141 142 146 CAP 22UF 20 25V TANTALUM C 440 22 C130
71. ble power up states plus factory default and RST POWER SUPPLY Nominal 100 to 240VAC rms 50 60Hz 90VA WARRANTY 1 year EMC Conforms to European Union Directive 89 336 EEC EN 61326 1 SAFETY Conforms to European Union Directive 73 23 EEC EN 61010 1 VIBRATION MIL PRF 28800F Class 3 Random Vibration WARM UP 1 hour to rated accuracies DIMENSIONS WEIGHT 89mm high x 213 mm wide x 370mm deep 3 in x 8 in x 4946 in Bench configuration with handle amp feet 104mm high x 238mm wide x 370mm deep 4 in x 9 in x 1496 in Net Weight 3 8kg 8 38 lbs ENVIRONMENT Operating 0 50 C 70 R H up to 35 C Derate 3 R H C 35 50 C Storage 25 to 65 C NOTES 1 With remote voltage sense 2 With 10kQ thermistor as sensor 3 Short term stability is defined as 24 hours with Peltier and Model 2510 at 25 C 0 5 C 4 Long term stability is defined as 30 days with Peltier and Model 2510 at 25 C 0 5 C 5 10Hz to 10MHz measured at 5A output into a 2Q load 12 For 1kQ unbalance in LO lead 6 Common mode voltage 0V Minimum amplifier specification meter connect enabled connects 13 Resistance range 0Q to 1000 for Peltier low output to thermistor rated accuracy measure circuit ground 0 1 14 Accuracy figures represent the of rdg 0 1Q with meter connect uncertainty that the Model 2510 disabled may add to the temperature 7 Resistance range 0Q to 200 for measurement not including ther rated a
72. 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 2510 These static sensitive devices require special handling as explained in Section 5 e Whenever a circuit board is removed or a component is replaced the Model 2510 must be recalibrated See Section 2 for details on calibrating the unit Models 2510 and 2510 AT Troubleshooting 4 3 Power on self test During the power on sequence the Model 2510 will perform a checksum test on its EPROM and test its RAM If one of these tests fails the instrument will lock up 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 checks 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 follow ing steps to run the KEYS test 1 Display the MAIN MENU by pressing the MENU key 2 Using the EDIT keys 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 KEYS and press ENTER to start the test When a key is pressed
73. bration OUTPUT F OUTPUT S Connect sense S leads as close connections as possible to resistor body OUTPUT S lt OUTPUT F WARNING No INTERNAL OPERATOR SERVICABLE PARTS SERVICE BY QUALIFIED PERSONNEL ONLY am MORAN wit FRONT PANEL MENU ENABLE DIG ewe RS 232 us E LINE FUSE SLOWBLOW A LINE RATING KF t CAUTION For CONTINUED PROTECTION AGAINST FIRE HAZARD REPLACE FUSE WITH SAME TYPE AND RATING j Model 2510 Step 6 Voltage source calibration 1 From the CAL EXECUTE menu select V SOURCE then press ENTER The instru ment will display the following message V SRC CAL Open Peltier leads then press 4 ENTER Disconnect all resistors and test leads from the Model 2510 OUTPUT terminals 3 Press ENTER to complete voltage source calibration Press EXIT to return to the CALIBRATION menu Models 2510 and 2510 AT Calibration 2 19 Step 7 Enter calibration dates and save calibration For temporary calibration without saving new calibration constants proceed to Step 6 Lock out calibration 1 From the CALIBRATION menu select SAVE then press ENTER The unit will prompt you for the calibration date CAL DATE 02 15 2000 Use 4 gt A V ENTER or EXIT 2 Using the EDIT keys change the displayed date to today s date then press the ENTER key Press ENTER again to confirm the date 3 The unit will then prompt for the calibration due date NEXT CAL 02 15 2001 Use 4 gt A
74. ccuracy mistor uncertainty These accura 8 Current through Peltier 0 2A cy figures are for thermistors with P C typical A B C constants 9 Default values shown selectable values of 10 100pA 833p A 2 5mA Note that tempera ture control performance will degrade at lower currents 10 AC Ohms is a dual pulsed meas urement using current reversals available over bus only 11 23 C 5 HW 3 13 02 Rev Models 2510 and 2510 AT Specifications A 3 Accuracy calculations The information below discusses how to calculate accuracy for both TEC measurement and thermal feedback element specifications Accuracy specifications are stated as follows Accuracy of reading offset As an example of how to calculate the actual limits assume an output voltage of 5V You can compute the limits from one year operating voltage accuracy specifications as follows Accuracy of reading offset 0 1 X 5V 4mV t 5mV 4mV 9mV Thus the actual operating voltage range is 5 9mV or from 4 991 to 5 009V Calibration Reference B 2 Calibration Reference Models 2510 and 2510 AT Introduction This appendix contains detailed information on the various Model 2510 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 M
75. clean copper wire see Figure 2 4 Allow one minute for thermal equilibrium 22 Press ENTER The Model 2510 will display the following RES VALUE 00 00000 2 Use 4 P A V ENTER or EXIT 23 Press ENTER to complete the shorted calibration step then remove the shorting wires from the INPUT terminals 24 From the THERMISTOR CAL menu select 100kQ then press ENTER The unit will display the following THERMISTOR CAL Connect to temperature p 4 sensor and press ENTER 25 Connect the 100kQ resistor to the Model 2510 INPUT terminals Figure 2 3 26 Press ENTER The Model 2510 will display the following RES VALUE 0100 000kQ Use 4 gt ENTER or EXIT 27 Use the EDIT keys to adjust the Model 2510 display to agree exactly with the charac terized 100kQ resistance value then press ENTER The unit will display the following THERMISTOR CAL Connect a Short to temperature p sensor and press ENTER 28 Shortall four INPUT terminals together using clean copper wire see Figure 2 4 Allow one minute for thermal equilibrium 29 Press ENTER The Model 2510 will display the following RES VALUE 00 000000 Use 4 P A V ENTER or EXIT Models 2510 and 2510 AT Calibration 2 15 30 Press ENTER to complete the shorted calibration step then remove the shorting wires from the INPUT terminals 31 Press EXIT to return to the TEMPERATURE CAL menu 32 Select RTD then press ENTER The unit displays
76. components in mains circuits including the power transformer test leads and input jacks must be purchased from Keithley Instruments Standard fuses with applicable national safety ap provals 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 accuracy 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 an 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 Products that consist of a circuit board with no case or chassis e g data acquisition board for installation into a computer should never require cleaning if handled accord ing to instructions If the board becomes contaminated and operation is affected the board should be returned to the factory for proper cleaning servicing Table of Contents 1 Performance Verification Introduction ree eie delati 1 2 Verification test requirements 1 2 Environmental conditions eese 1 2 Warm up period i cc ric Tere 1 2 Line DOWeL i ee
77. cterized value of the 1Q resistor Verify that the current calculated in step 6 is within 4 474 to 4 526A limits Repeat steps 6 and 7 for an output current of 4 5000A Turn off the output when the test is completed 1 9 Performance Verification Models 2510 and 2510 Figure 1 2 Connections for current verification tests 1Q Resistor OUTPUT S OUTPUT F E Connect sense S leads as close as L possible to resistor body OUTPUT 5 el lt OUTPUT F WARNING no orenaron sercante PARTS SERVICE BY GUALPIED PERSONEL OM INPUT LO Model 2002 DMM Model 2510 Current readback accuracy Follow the steps below to verify that Model 2510 current readback accuracy is within speci fied limits The test involves setting the output current to a specific value using a 1Q resistor and a digital multimeter 1 With the power off connect the digital multimeter and 1Q resistor to the Model 2510 OUTPUT terminals as shown in Figure 1 2 Turn on the Model 2510 and the DMM and allow them to warm up for one hour Select the multimeter DC voltage measuring function and set the unit to the 20V range Press CONFIG then I choose PROTECTION then set the current limit to 5 00A Press the Model 2510 I key to select the current function and make sure the source out put is turned on 6 Using the EDIT keys adjust the Model 2510 output current to
78. cuits includes the microcomputer that controls the analog section front panel and GPIB and RS 232 ports as well as associated interfacing circuits e Power supplies converts the AC line voltage into DC voltages that supply the power for the digital and analog circuits and the class D power amplifier Figure 4 1 R _ _ Analog Section E _ Overall block Pulse Class D diagram DAC gt Width gt H Drive Output Output to TEC Modulator Stage Control Overl TEC Register Limit VV Sensing Y Sensor Input from C AID Signal rO Temperature Conditioning Sensor To Analog To Output To Digital 4 ne Circuits Stage Circuits B p ai p gt x 15V 45V 15V 5V Display Front Panel lt RS 232 34 RS 232 I O T T Keyboard Controller i 9 _ Microcomputer l Analog caput Digital Digital l Power 8 Power lt gt Tri Power Vo Trigger GPIB Supply Supply Trigger Digital Interface i Supply tae ee 5 E 2 M E ses Power Supply Line In Digital Section 4 6 Troubleshooting Models 2510 and 2510 AT Analog circuits Figure 4 2 Block diagram of analog circuits Figure 4 2 shows
79. cussed below Reading the error queue As with other Model 2510 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 2 summarizes calibration errors If errors occur and CAL PROT SAVE is sent cal ibration constants without errors will be saved while those with errors will not 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 then test bit 2 to see if it is set If the EAV bit is set an error has occurred and you can use the appropriate error query to read the error and at the same 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 following command SRE 4 This command will enable SRQ when the EAV bit is set You can then read the status byte and error queue as outlined above to check for errors and to determine the exact nature of the error Models 2510 and 2510 AT Table B 2 Calibration errors Error number Calibration Reference Error message 500 501 502 509 510 520 521 522 523 524 525 530 531 532 533 540 541 542 543 550 551 552 553 560 561 562 563 564 565 566 570 Date o
80. d not under warranty see the calibration procedures in Section 2 for information on calibrating the unit Models 2510 and 2510 Performance Verification 1 6 Test considerations WARNING maximum common mode voltage voltage between INPUT OUTPUT terminals and chassis ground is 30V DC Exceeding this value may cause a shock hazard CAUTION maximum voltage between INPUT OUTPUT sense S terminals is 1V Exceeding this voltage may result in instrument damage When performing the verification procedures Be sure to restore factory front panel defaults as previously outlined Make sure that the test equipment is fully warmed up and properly connected to the Model 2510 INPUT or OUTPUT terminals as required Besure that the Model 2510 output is turned on before making measurements Besure the test equipment is set up for the proper function and range Allow the Model 2510 output signal to settle before making a measurement Do not connect test equipment to the Model 2510 through a scanner multiplexer or other switching equipment Adjusting setpoints Before making many verification measurements you must properly adjust the setpoint as covered below 1 First select the function to be tested as indicated in the procedure 2 Press any one of the four EDIT keys 4 gt A V to enter the setpoint edit mode 3 Using the EDIT keys adjust the setpoint to the required value Voltage accuracy Ou
81. down and out on each mounting ear NOTE When reinstalling 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 Remove rear bezel To remove the rear bezel loosen the two screws that secure the rear bezel to the chassis then pull the bezel away from the case Remove bottom screws Remove the four screws that secure the case to the chassis They are located on the bottom of the case Remove chassis To remove the case grasp the front bezel of the instrument and carefully slide the chassis forward Slide the chassis out of the metal case Mother board removal Perform the following steps to remove the mother board This procedure assumes that the case cover is already removed 1 Remove the 488 ENABLE DIG I O RS 232 fasteners The IEEE 488 ENABLE DIG I O and RS 232 connectors each have two hex head screws that secure the connectors to the rear panel Remove these screws Remove mother board mounting screws Remove the two mounting screws that secure the mother board to the chassis Unplug cables Unplug the display board ribbon cable from J1014 Unplug the cables going to the power supply from J1003 Unplug the cable going to the OUTPUT indicator from J102 Unplug the fan cable from J1015 Models 2510 and 2510 AT Disassembly 5 5 4 Remove mother b
82. e lt and gt arrow keys to choose the position Press W for letters A for numbers Enter the present password on the display Front panel default 002510 Once the correct password is displayed press the ENTER key You can then proceed with the calibration procedure 2 6 Calibration Models 2510 and 2510 AT Unlocking calibration by remote To unlock calibration via remote send the following command CAL PROT CODE lt password gt For example the following command uses the default password CAL PROT CODE KI002510 Changing the password The default password 002510 may be changed from the front panel or via remote as discussed Changing the password from the front panel Follow the steps below to change the password from the front panel 1 Press the MENU key choose CAL and press ENTER The instrument will display the following CALIBRATION UNLOCK EXECUTE VIEW DATES p SAVE LOCK CHANGE PASSWORD Select UNLOCK then enter the password Default 002510 3 Select CHANGE PASSWORD and then press ENTER The instrument will display the following New Pwd 002510 Use 4 P V ENTER or EXIT Using the EDIT keys enter the new password on the display 5 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
83. e V function selected 5V output voltage 5 current limit and 1Q and 1000 resistors connected to the OUTPUT and INPUT terminals respectively Turn OUTPUT ON while measuring Table 4 4 Analog circuitry checks Step Item component Required condition Remarks 1 TP103 10 4V H drive signal 2 TP104 4V H drive signal 3 TP1087 6 3V A D reference signal 4 TP1097 12 5V 14V nominal supply 5 TP1107 12 5V 14V nominal supply 6 1142 OV Sensor feedback signal 7 TP118 Pulse train Mux output to A D converter 8 1192 0 5V OUTPUT current sense signal 9 TPI20 5V OUTPUT voltage sense signal 6 Measured with respect to F common TP121 7 Measured with respect to A2 common TP122 Internal fuse replacement WARNING Disconnect the line cord and all cables and test leads from the instrument before replacing internal fuses CAUTION Do not install a fuse with a higher current rating than specified or instru ment damage may occur Power supply module fuse replacement An internal fuse protects the power supply module from over current conditions Replace this fuse as follows 1 Turn off the power and disconnect the line cord and all other test leads and cables from the instrument Remove the case cover and mother board as covered in Section 5 3 Locate the fuse on the power supply module circuit board The module is mounted on the chassis bottom 4 Replace the fuse with one with the same curre
84. e eee iei r 1 3 Recommended test equipment 1 3 Resistor characterization 2 1 4 Verification mits sc eec 1 4 Example limits calculation eene 1 4 Resistance limits calculation eese 1 4 Restoring factory defaults 2 1 5 Performing the verification test procedures 1 5 Test SUrDmaty there ise bae pde vede eiae 1 5 Test considerati ns ettet ec 1 6 Adjusting setpoints 1 6 Voltage ACCUTACY ironii ean a aE EE E EER a 1 6 Output voltage accuracy 1 6 Voltage readback accuracy 1 7 Voltage limit accuracy 1 8 Current ACCURACY event e Ee Yee rae eee EN 1 8 Output current accuracy 1 8 Current readback accuracy eene 1 9 Current limit accuracy essere nnne 1 10 AG resistance sorene riir RA E Resta emus 1 10 Sensor measurement nennen 1 11 2 Calibration Introduction iori eti e eere eret aa 2 2 Environmental conditions 2 2 Temperature and relat
85. e 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 2510 902 01 Revision B Document Number 2510 902 01 Revision C Document Number 2510 902 01 December 2000 February 2002 Revision D Document Number 2510 902 01 cessent 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 KERESI Safety Precautions The following safety precautions should be observed before using this product and any associated instrumentation 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 and follow all installation operation and maintenance information carefully before us ing the product Refer to the manual for complete product specifications If the product is used in a
86. e 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 Assembly drawings Use the assembly drawings located at the end of this section to assist you as you disassemble and reassemble the Model 2510 Refer to these drawings for information about the Keithley part numbers of most mechanical parts in the unit Assembly drawings include e Front panel assembly 2510 040 e Chassis power module assembly 2510 050 Front panel chassis assembly 2510 051 e Chassis assembly 2510 052 e Final inspection 2510 080 5 4 Disassembly Models 2510 and 2510 AT 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 Remove handle The handle serves as an adjustable tilt bail 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 Remove mounting ears Remove the screw that secures each mounting ear Pull
87. e used to determine the total number of times the Model 2510 has been calibrated Example CAL PROT COUNT Request calibration count B 4 Calibration Reference Models 2510 and 2510 AT CALibration PROTected LOCK Purpose To lock out calibration Format cal prot lock Query cal prot lock Response 0 Calibration unlocked 1 Calibration locked Description The LOCK command allows you to lock out calibration after completing the procedure Thus LOCK performs the opposite of sending the password with the CODE command The LOCK query returns calibration lock status NOTE unlock calibration send the CODE command with the appropriate password Example CAL PROT LOCK Lock out calibration SAVE CALibration PROTected 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 be only temporary unless the SAVE command is sent to perma nently store calibration constants Calibration data will not be saved if calibration was not unlocked by sending the CODE command or if invalid calibration data exists Example CAL PROT SAVE Save calibrati
88. ed limits This test involves setting the output voltage to a specific value as measured by a DMM and verifying that the Model 2510 voltage readback display reading is within limits 1 With the power off connect the digital multimeter to the Model 2510 OUTPUT termi nals as shown in Figure 1 1 Turn on the Model 2510 and DMM and allow them to warm up for at least one hour 3 Select the multimeter DC volts measuring function and choose the 20V range Press the Model 2510 V key to select the voltage function and make sure the source output is turned on 5 Using the EDIT keys adjust the Model 2510 output voltage as measured by the DMM to 9 000V or closest possible value 6 Verify that the Model 2510 readback display top display line is within 8 987 to 9 013V limits 7 Repeat steps 5 and 6 for 9 000V output value 8 Turn off the output when the test is completed Models 2510 and 2510 AT Performance Verification 1 8 Voltage limit accuracy Follow the steps below to verify that Model 2510 voltage limit accuracy is within specified limits The test involves setting the voltage limit to a specific value and making sure the output voltage is limited to the required value 1 395200 SN e o With the power off connect the digital multimeter to the Model 2510 OUTPUT termi nals as shown in Figure 1 1 Turn on the Model 2510 and the DMM and allow them to warm up for one hour Select the m
89. ed on the digital board This ROM is the only IC installed in a socket Refer to the 2510 100 component layout drawing at the end of Section 6 for exact location Carefully push down on the ROM IC to make sure it is properly seated in its socket CAUTION careful not to push down excessively or you might crack the mother 5 board Connect the line cord and turn on the power If the problem persists additional trouble shooting will be required Disassembly 5 2 Disassembly Models 2510 and 2510 AT Introduction This section explains how to handle clean and disassemble the Model 2510 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 touch ing the PC board traces while you are repairing the instrument Mother board 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 flu
90. en short to INPUT terminals Figure 2 3 and Figure 2 4 1kQ resistor short 1kQ resistor then short to INPUT terminals Figure 2 3 and Figure 2 4 10kQ resistor short 10kQ resistor then short to INPUT terminals Figure 2 3 and Figure 2 4 100kQ resistor short 100kQ resistor then short to INPUT terminals Figure 2 3 and Figure 2 4 RTD 100Q resistor short 1000 resistor then short to INPUT terminals Figure 2 3 and Figure 2 4 1kQ resistor short 1kQ resistor then short to INPUT terminals Figure 2 3 and Figure 2 4 1 55 1kQ resistor DMM and 1kQ resistor to INPUT terminals Figure 2 5 V SS 1kQ resistor short DMM 1k resistor short to INPUT terminals Figure 2 4 and Figure 2 5 AC OHMS 100Q resistor 100Q resistor to OUTPUT terminals Figure 2 6 V SOURCE Open leads None open OUTPUT terminals CAL EXECUTE menu selections Step 2 Voltage calibration 1 From the CAL EXECUTE menu select VOLTAGE then press ENTER The instrument will display the following message VOLTAGE CAL Connect only a DMM to Peltier p gt Then press ENTER 2 Connect the DMM to the Model 2510 OUTPUT terminals as shown in Figure 2 1 Figure 2 1 Voltage calibration connections OUTPUT F OUTPUT S Model 2002 DMM WARNING NO INTERNAL OPERATOR SERVICABLE PARTS SERVICE BY QUALIFIED PERSONNEL ONL E EU wit FRON iy a e o OUTPUT S TRIGGER LE LINK OUTPUT F
91. ent SOURce lt NRf gt Calibrate Peltier source sense voltage AUTO Calibrate voltage source IPDac Calibrate current protection DAC RESistance AC lt NRf gt Calibrate AC ohms DATE lt y gt lt m gt lt d gt Program calibration year month day NDUE lt y gt lt m gt lt d gt Program calibration due year month day SAVE Save calibration data in EEPROM LOCK Lock out calibration Models 2510 and 2510 AT Remote calibration procedure Step 1 Prepare the Model 2510 for calibration 1 Table 2 6 Calibration 2 21 With the power off connect the Model 2510 to the controller IEEE 488 interface or RS 232 port using a shielded interface cable Turn on the Model 2510 and the test equipment and allow them to warm up for at least one hour before performing calibration If you are using the IEEE 488 interface make sure the primary address of the Model 2510 is the same as the address specified in the program you will be using to send commands Use the MENU key and the COMMUNICATION menu to access the IEEE 488 address Send the following command to unlock calibration CAL PROT CODE KI002510 Table 2 6 summarizes the various calibration steps and associated commands which are covered in more detail throughout the procedure Remote calibration step summary Calibrated function Calibration command Test connections Voltage Current Current protection
92. es are the property of their respective companies Keithley Instruments Inc Sales Offices BELGIUM CHINA FINLAND FRANCE GERMANY GREAT BRITAIN INDIA ITALY JAPAN KOREA NETHERLANDS SWEDEN SWITZERLAND TAIWAN 28775 Aurora Road Cleveland Ohio 44139 440 248 0400 Fax 440 248 6168 1 888 KEITHLEY 534 8453 www keithley com Bergensesteenweg 709 B 1600 Sint Pieters Leeuw 02 363 00 40 Fax 02 363 00 64 Yuan Chen Xin Building Room 705 12 Yumin Road Dewai Madian Beijing 100029 8610 6202 2886 Fax 8610 6202 2892 Tiet j ntie 2 02130 Espoo Phone 09 54 75 08 10 Fax 09 25 10 51 00 3 all e des Garays 91127 Palaiseau C dex 01 64 53 20 20 Fax 01 60 11 77 26 Landsberger Strasse 65 82110 Germering 089 84 93 07 40 Fax 089 84 93 07 34 Unit 2 Commerce Park Brunel Road Theale Berkshire RG7 4AB 0118 929 7500 Fax 0118 929 7519 Flat 2B Willocrissa 14 Rest House Crescent Bangalore 560 001 91 80 509 1320 21 Fax 91 80 509 1322 Viale San Gimignano 38 20146 Milano 02 48 39 16 01 Fax 02 48 30 22 74 New Pier Takeshiba North Tower 13F 11 1 Kaigan 1 chome Minato ku Tokyo 105 0022 81 3 5733 7555 Fax 81 3 5733 7556 2FL URI Building 2 14 Yangjae Dong Seocho Gu Seoul 137 888 82 2 574 7778 Fax 82 2 574 7838 Postbus 559 4200 AN Gorinchem 0183 635333 Fax 0183 630821 c o Regus Busines
93. esistor still connected to the OUTPUT terminals press ENTER The Model 2510 will automatically complete the current protection calibration process 7 Disconnect the 1 resistor from the OUTPUT terminals 2 12 Calibration Models 2510 and 2510 AT Step 4 Temperature calibration 1 Connect the 1000 resistor to the Model 2510 INPUT terminals as shown in Figure 2 3 2 From the CAL EXECUTE menu select TEMPERATURE then press ENTER The instrument will display the following message TEMPERATURE CAL THERMISTOR RTD 1 55 V SS Figure 2 3 100Q 1kQ 10kQ or 100kQ Resistor Thermistor and RTD INPUT S ibrati INPUT F Connect sense S leads as close calibration resistor as possible to resistor body connections INPUT S INPUT F 55 ee etsi a ENABLEDIG 10 mme e C TRIGGER RS 232 QZ Eris Model 2510 3 Select THERMISTOR then press ENTER The instrument will display the following THERMISTOR CAL 1000 100kQ 4 Select 100Q then press ENTER The unit will display the following THERMISTOR CAL Connect 1000 to temperature p 44 sensor and press ENTER 5 Make sure the 1000 resistor is properly connected then press ENTER The Model 2510 will display the following RES VALUE 0 100000kQ Use 4 gt A V ENTER or EXIT 6 Use the EDIT keys to adjust the Model 2510 display to agree exactly with the characterized 1000 resistance value then press
94. et Use STB to request the status byte Once operation complete has been detected clear OPC status using one of two meth ods 1 use the ESR query 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 Models 2510 and 2510 AT Calibration Reference B 13 Generating an SRQ on calibration complete An 488 bus SRQ service request can be used to detect operation complete instead of repeatedly polling the Model 2510 To use this method send both ESE 1 and SRE 32 to the instrument then include the command at the end of each calibration command line as covered above Clear the SRQ by querying the ESR using the ESR query to clear OPC sta tus then request the status byte with the STB query Refer to your controller s documentation for information on detecting and servicing SRQs C Calibration Program C 2 Calibration Program Models 2510 and 2510 AT Introduction This appendix includes a calibration program written in BASIC to help you to calibrate the Model 2510 Refer to Section 2 for more details on calibration procedures equipment and con nections Appendix B covers calibration commands in detail Computer hardware requirements The following computer hardware is required to run the calibration programs IBM PC compatible computer
95. f calibration not set Next date of calibration not set Calibration data invalid Not permitted with cal locked Not permitted with cal un locked Source gain data invalid Source offset data invalid Source gain data invalid Source offset data invalid Source DAC Overflow Source DAC Underflow I Protection gain data invalid I Protection offset data invalid T Protection DAC Overflow I Protection DAC Underflow V Meas gain data invalid V Meas offset data invalid V Meas gain data invalid V Meas offset data invalid I Meas gain data invalid Meas offset data invalid I Meas gain data invalid Meas offset data invalid 100 Ohm Thermistor data invalid 1kOhm Thermistor data invalid 10kOhm Thermistor data invalid 100kOhm Thermistor data invalid RTD data invalid VSS data invalid ISS data invalid AC Ohms data invalid B 11 B 12 Calibration Reference Models 2510 and 2510 AT Detecting calibration step completion When sending remote calibration commands you must wait until the instrument completes the current operation before sending another command You can use either OPC or OPC to help determine when each calibration step is completed Using the OPC query With the OPC operation complete query the instrument will
96. he following command to output OV SOUR VOLT 0 Note and record the DMM reading then send that value as the parameter for the follow ing commands CAL IPROT SENS VOLT DMM Reading CAL PROT SOUR DMM Reading Send the following command to output 8 5V SOUR VOLT 8 5 Note and record the DMM reading then send that value as the parameter for the follow ing commands CAL IPROT SENS VOLT DMM Reading CAL PROT SOUR DMM Reading Send this command to turn off the output OUTP OFF Disconnect the DMM from the OUTPUT terminals Step 3 Current and current protection calibration 1 2 Connect the 1Q resistor to the Model 2510 OUTPUT terminals as shown in Figure 2 2 Send this command to turn on the output OUTP ON Send the following command with the characterized 1Q resistor value as the command parameter CAL PROT SENS CURR Resistance Value For example if the actual resistor value is 1 01 2 the correct command is CAL PROT SENS CURR 1 01 2 24 Calibration Models 2510 and 2510 AT 4 With the 10 resistor still connected send the following command to calibrate the cur rent protection DAC CAL PROT IPD 5 Send this command to turn off the output OUTP OFF 6 Disconnect the 1Q resistor from the OUTPUT terminals Step 4 Temperature calibration 1 Connectthe 100 resistor to the Model 2510 INPUT terminals as shown in Figure 2 3 2 Send the following command to select the thermistor ty
97. he line fuse The power line fuse is accessible from the rear panel and is integral with the AC power module see Figure 3 1 Figure 3 1 Model 2510 Rear panel WAPINING uo regat OPERATOR IEEE 498 MADE IN ENTER IEEE ADDRESS INPUT U S A WITH FRONT PANEL MENU F S S F S s TRIGGER RS 232 GGE LINE FUSE SLOWBLOW 2 5A 250V LINE RATING 100 240 50 60 HZ NS 2 CAUTION CONTINUED PROTECTION AGAINST FIRE HAZAfID REPLACE FUSE WITH SAME AND RATING Line Fuse Models 2510 and 2510 AT Routine Maintenance 3 3 Perform the following steps to replace the line fuse 1 Using a small flat blade screwdriver carefully release the locking tab that secures the fuse carrier to the power module 2 Pull out the fuse carrier and replace the fuse with the type specified in Table 3 1 CAUTION To prevent instrument damage use only the fuse type specified in Table 3 1 3 Reinstall the fuse carrier pushing it in firmly until it locks into place NOTE Ifthe power line fuse continues to blow a circuit malfunction exists and must be corrected Refer to the troubleshooting information in Section 4 of this manual for additional information Table 3 1 Power line fuse Line voltage Rating Keithley part no 100 240V 250V 2 5A Slow FU 106 2 5 Blow 5 x 20mm Troubleshooting 4 2 Troublesho
98. igital circuitry Refer to Figure 4 9 for the following discussion on digital circuitry Figure 4 9 Digital circuitry ROM RAM overall block diagram U168 U160 Serial Reset KJ r 3 Interface gt RS 232 Interface gt U166 PROM VI Microprocessor GPIB lt EEE 488 Interface 0163 0167 U169 0170 Control Data A D Interface lt lt 32 U171 To Display Board Controller 16 78MHz Voltage Source Trigger Control Link e in Trigger uies f 86 Digital I O Di 0164 The core digital circuitry uses a Motorola 68332 microcontroller 7163 running at 16 78MHz The memory configuration includes a flash EEPROM U168 and a RAM U160 Flash ROM support allows internal firmware upgrades using either the serial or GPIB port for downloading new firmware All calibration constants and the saved setups are stored in a sepa rate serial EEPROM U141 External communication is provided via GPIB and serial interfaces A 9914 GPIB IEEE 488 standard interface IC U167 is used for the GPIB and a U166 provides the voltage conversion for the RS 232 port U164 provides interfacing for the Digital I O port 4 14 Troubleshooting Models 2510 and 2510 AT Figure 4 10 shows a diagram for digital control that includes serial to parallel converters U134 to U136 and associated control signal nomenclatures Figure 4 10 Digital control circuits MEAS_DUT_HI MEAS DUT LO GND GND GAIN_4
99. ing and R is the characterized value of the 1Q resistor Verify that the current calculated in step 9 is within 4 275 to 4 725A limits Turn off the output when the test is completed AC resistance accuracy Follow the steps below to verify that Model 2510 AC resistance accuracy is within specified limits The test involves connecting a 100Q resistor to the OUTPUT terminals and verifying that the Model 2510 AC resistance reading is within limits 1 Qoo de 429 529 With the power off connect the 100Q resistor to the Model 2510 OUTPUT terminals as shown in Figure 1 3 Connect the Model 2510 to the serial port or IEEE 488 interface of the computer Turn on the Model 2510 and allow it to warm up for one hour before testing Press CONFIG then R Select AC OHMS then press ENTER Note the reading and verify that the resistance measurement is within required limits Recalculate limits using the characterized resistance value and Model 2510 AC resis tance specifications For 1000 resistance the limits are 99 88 to 100 120 1 11 Performance Verification Models 2510 and 2510 Figure 1 3 1000 Resistor Connections for OUTPUT F OUTPUT S Connect sense S leads as close AC resistance as possible to resistor body 4 OUTPUT F verification test OUTPUT S amp IEEE 488 MADE IN 6 ENTER IEEE ADDRESS USA WITH FRONT PANEL MENU 2 Ze TRIGGER 95 232 LINK LINE FUSE SLOWBLOW 25A 250V A UNE
100. ion step completion B 12 Generating an SRQ on calibration complete B 13 Using the OPC command B 12 Using the OPC query B 12 Digital circuitry checks 4 16 Disassembly 5 1 Display board checks 4 15 Environmental conditions 2 2 Line power 2 2 Temperature and relative humidity 2 2 Warm up period 2 2 Factory service 6 2 Front panel calibration 2 8 Front panel disassembly 5 5 Front panel tests 4 3 CHAR SET test 4 4 DISPLAY PATTERNS test 4 4 KEYS test 4 3 Fuse replacement Digital I O 5V supply 4 18 Power supply module 4 17 General program instructions C 3 Program C 1 Model 2510 calibration program C 4 Handling and cleaning 5 2 Handling PC boards 5 2 Solder repairs 5 2 H Bridge 4 8 Instrument reassembly 5 6 Internal fuse replacement 4 17 Introduction 1 2 2 2 3 2 4 2 5 2 6 2 B 2 C2 Line fuse replacement 3 2 Miscellaneous commands B 3 CODE B 3 COUNT B 3 DATE B 5 LOCK B 4 NDUE B 5 SAVE B 4 Mother board removal 5 4 No comm link error 4 18 Ordering information 6 2 Parts list Display board 6 9 Miscellaneous 6 10 Mother board 6 3 Parts lists 6 2 Performance Verification 1 1 Performing the verification test procedures 1 5 Adjusting setpoints 1 6 Test considerations 1 6 Test summary 1 5 PID hardware loop control 4 11 Power line fuse 3 3 Power supply checks 4 16 Power on self test 4 3 Principles of operation 4 5 Analog circuits 4 6 A D converter 4 11 Measurement circuits 4 10 Source ci
101. it 1 8 Output 1 6 readback 1 7 KEITHLEY Service Form Model No Serial No Date Name and Telephone No Company List all control settings describe problem and check boxes that apply to problem Q Intermittent Q Analog output follows display Q Particular range or function bad specify L IEEE failure Q Obvious problem on power up L Batteries and fuses are OK Front panel operational All ranges or functions are bad Q Checked all cables Display or output check one Q Drifts Q Unable to zero Unstable Q Overload Q Will not read applied input Q Calibration only Q Certificate of calibration required Q 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 ent ipm An Interworld Highway LLC Company Specifications are subject to change without notice All Keithley trademarks and trade names are the property of Keithley Instruments Inc All other trademarks and trade nam
102. ive humidity 2 2 Warm Up period 22 2 2 Line POWER M P 2 2 Calibration considerations 2 3 Calibration cycle deir ete hae tere eee eene 2 3 Recommended calibration equipment 2 3 Resistor characterization esee 2 4 Calibration MENU n ctii ee tt eri pr eene 2 5 Unlocking calibration eese 2 5 Unlocking calibration from the front panel 2 5 Unlocking calibration by remote 122211 2 6 Changing the password 4 2224 4 0 2 6 Changing the password from the front panel 2 6 Changing the password by remote 2 6 Resetting the calibration password 2 7 Viewing calibration dates and calibration count 2 7 Calibration i etre ton ther er rns 2 7 Front panel error reporting 2 7 Remote error reporting 2 eee 2 7 Aborting calibration steps 2 8 Front panel calibration c esent ede 2 8 Remote calibration 2 20 Remote calibration command summary 2 20 Remote calibration procedure eee 2 21 Rou
103. le 4 4 6 Table 6 1 Table 6 2 Table 6 3 B Table B 1 Table B 2 Performance Verification Recommended verification equipment 1 3 Characterized resistor values eee 1 4 Sensor resistance measurement accuracy limits 1 13 Calibration Recommended calibration equipment 2 4 Characterized resistor values 2 4 Calibration Ment a a a a aia 2 5 Calibration step summary 2 9 Remote calibration command summary 2 20 Remote calibration step 2 21 Routine Maintenance Power hne 3 3 Troubleshooting Display board checks 4 15 Power supply checks 4 16 Digital circuitry checks 2 4 16 Analog circuitry checks 2 4 17 Replaceable Parts Mother board parts list esee 6 3 Display board parts list eere 6 9 Miscellaneous parts 18 6 10 Calibration Reference Calibration commands eese nennen B 2 Calibration errors o eite tier tbe eed B 11 Performance Verification Models 2510 and 2510 AT Performance Verification 1 2 Introduction Use the procedures in this section to verify that Model 2510 accuracy is within the limits stated in
104. ng V SS CAL Connect a Short to temperature p sensor and press ENTER 53 Short all four INPUT terminals together using clean copper wire see Figure 2 4 Allow one minute for thermal equilibrium 54 Press ENTER The Model 2510 will display the following DMM RDG 0 000000V Use 4 gt V ENTER or EXIT Models 2510 and 2510 AT Calibration 2 17 55 Press ENTER to complete the shorted calibration step then remove the shorting wires from the INPUT terminals 56 Press EXIT to return to the CAL EXECUTE menu Figure 2 5 I SS and V SS calibration resistor connections TNO Resistor Connect senise 5 leads as close as possible to INPUT 5 resistor body INPUT F INPUT S KEITHLEY INPUT HI INPUT LO Model 2002 DMM Model 2510 2 18 Calibration Models 2510 and 2510 AT Step 5 AC ohms calibration 1 From the CAL EXECUTE menu select AC OHMS then press ENTER The instru ment will display the following message AC OHMS CAL Connect 1000 load to Peltier gt Then press ENTER Connect the 100Q resistor to the OUTPUT terminals see Figure 2 6 3 Press ENTER The instrument will display the following RES VALUE 0 100000kQ Use 4 P A V ENTER or EXIT 4 Use the EDIT keys to adjust the Model 2510 display to agree exactly with the charac terized 100 resistance value then press ENTER Figure 2 6 100Q Resistor AC ohms cali
105. nt and voltage rating marked on the power supply module circuit board 4 18 Troubleshooting Models 2510 and 2510 AT Digital I O 5V supply fuse replacement An internal fuse protects the 5V supply line on the ENABLE DIG I O connector from over current conditions Replace this fuse as follows 1 Turn off the power and disconnect the line cord and all other test leads and cables from the instrument Remove the case cover as covered in Section 5 Locate fuse F101 on the mother board This fuse is located near the ENABLE DIG I O RS 232 connector assembly J1007 at the back of the board See the 2510 100 compo nent layout drawing at the end of Section 6 for location Carefully unsolder the blown fuse Replace the fuse with one with the following rating 0 6A Keithley part number FU 103 then solder it in place After soldering clean the mother board as covered in Section 5 Handling and clean ing precautions No comm link error A No Comm Link error indicates that the front panel processor has stopped communicat ing with the main processor which is located on the mother board This error indicates that the main processor ROM U168 may require reseating in its socket The ROM may be reseated as follows 1 4 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 Locate the firmware ROM U168 locat
106. o warm up for at least one hour before conducting the verification procedures 1 3 Performance Verification Models 2510 and 2510 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 C 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 2510 requires a line voltage of 100 to 240V and a line frequency of 50 or 60Hz Verification tests must be performed within this range Recommended test equipment Table 1 1 summarizes recommended verification equipment and pertinent specifications 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 2510 specifications Table 1 1 Recommended verification equipment Description Manufacturer Model Specifications Digital Multimeter Keithley 2002 DC Voltage 20V 6 8ppm Resistance 200 23ppm 2002 19ppm 2kQ 7 4ppm 20 0 7 4ppm 200kQ 29 8ppm Resistors Isotec RUG Z 1R00 0 1 1Q 0 1 100W 1000 1
107. oard Slide the mother board forward until the slots line up with the guide pins then remove the board During reassembly replace the mother board and start the IEEE 488 ENABLE DIG and RS 232 connector screws and the board mounting screws Tighten all the fas teners once they are all in place and the board is correctly aligned Be sure to plug in all cables Front panel disassembly Use the following procedure to remove the display board and or the pushbutton switch pad 1 Remove the power switch rod Carefully disconnect the power switch rod from the power switch mounted on the rear panel power module Slide the rod toward the rear until it clears the access hole in the front panel then remove the rod 2 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 Unplug the display board ribbon cables Using a 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 5 Remove the switch pad by pulling it from the front panel Removing power components The following procedures to remove the power supply and or power module require tha
108. odel 2510 calibration commands These commands are covered in detail in the following paragraphs Table B 1 Calibration commands Command Description CALibration Calibration subsystem PROTected Calibration commands protected by code password CODE lt password gt Unlock calibration Default code password 1002510 CODE Query calibration code password SENSe VOLTage lt NRf gt Calibrate Peltier voltage measurement DATA Query Peltier voltage calibration constants CURRent lt NRf gt Calibrate current measurement DATA Query current calibration constants TEMPerature lt NRf gt Calibrate temperature measurement DATA Query temperature calibration constants SOURce lt NRf gt Calibrate Peltier source sense voltage DATA Query Peltier source sense calibration constants AUTO Calibrate voltage source IPDac Calibrate current protection DAC DATA Query current protection DAC calibration constants RESistance AC lt NRf gt Calibrate AC ohms DATA Query AC ohms calibration constants DATE lt yyyy gt lt mm gt lt dd gt Program calibration year month day DATE Query calibration date NDUE lt yyyy gt lt mm gt lt dd gt Program calibration due year month day NDUE Query calibration due date SAVE Save calibration data in EEPROM LOCK Lock out calibration LOCK Query if calibration is locked 1 locked 0 unlocked COUNt Query number of times Model 2510 has been calibrated
109. on constants Models 2510 and 2510 AT Calibration Reference B 5 DATE CALibration PROTected DATE Purpose To program the calibration date Format cal prot date year month day Parameters year 2000 to 2099 month 1 to 12 day gt 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 back the date from the instru ment 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 2000 11 20 Send cal date 11 20 2000 NDUE CALibration PROTected NDUE Purpose To send the next calibration due date to the instrument Format cal prot ndue year month day Parameters year 2000 to 2099 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 2001 11 20 Send due date 11 20 2001 B 6 SENSe commands Calibration Reference VOLTage CCALibration PROTected SENSe VOLTage CALibration
110. op CONTROL SYSTEM SPECIFICATIONS TEC OUTPUT SPECIFICATIONS OUTPUT RANGE 10 VDC at up to 5 ADC OUTPUT RIPPLE 5mV rms 5 AC RESISTANCE EXCITATION 9 6mA 190pA 10 11 TEC MEASUREMENT SPECIFICATIONS SET Constant Peltier Temperature FUNCTION 1 Year 23 C 5 C Constant Peltier Voltage Operating Constant Peltier Current Resistance 978 2 0 of rdg 0 19 Constant Thermistor Resistance Operating Voltage 16 0 1 of rdg 4mV CONTROL METHOD Operating Current 0 4 of rdg 8mA Programmable software PID loop Proportional Integral and Derivative gains independently program mable SETPOINT SHORT TERM STABILITY 0 005 rms SETPOINT LONG TERM STABILITY 0 01 2 SETPOINT RANGE 50 to 225 C OVER TEMPERATURE LIMIT 250 C max UNDER TEMPERATURE LIMIT 50 max SETPOINT RESOLUTION 0 001 C 1mV 100pA 0 01 of nominal 25 C thermistor resistance HARDWARE CURRENT LIMIT 1 0A to 5 25A 5 SOFTWARE VOLTAGE LIMIT 0 5 to 10 5V 5 AC Resistance 8 0 10 of rdg 0 02Q OPEN SHORTED THERMOELECTRIC DETECTION LOAD IMPEDANCE Stable into typical COMMON MODE VOLTAGE 30VDC maximum COMMON MODE ISOLATION gt 10 Q lt 1500 MAX SENSE LEAD RESISTANCE 1Q for rated accuracy MAX FORCE LEAD RESISTANCE 0 10 THERMAL FEEDBACK ELEMENT SPECIFICATIONS 1 Year 23 C 5 C Sensor Type Solid State Current Voltage Thermistor 1kQ 10kQ 100 kQ Output
111. operly initialized Enter the QBasic editor and type in the program below NOTE _ Be sure to change the resistor parameters R R 1 R 4 to the characterized values of the 1Q 1000 10kQ and 100kQ resistors See Section 2 for details 7 Check thoroughly for errors then save it using a convenient filename 8 Run the program and follow the prompts on the screen to perform calibration For test connections refer to the following figures in Section 2 Voltage calibration DMM connections Figure 2 1 Current and current protection calibration 1Q resistor connections Figure 2 2 Thermistor and RTD calibration 1000 to 100kQ resistor connections Figure 2 3 Shorted INPUT connections Figure 2 4 I SS and V SS calibration resistor DMM connections Figure 2 5 AC ohms calibration 1000 resistor connections Figure 2 6 4 Calibration Program Models 2510 and 2510 AT Program C 1 Model 2510 calibration program Model 2510 calibration program for use with Keithley 2002 DMM 2510 primary address 15 2002 primary address 16 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 CRLF Set input terminator PRINT 1 OUTTERM LF Set output terminator PRINT 1 REMOTE 15 16 Put 2510 2002 in remote PRINT 1 OUTPUT 15 RST Initialize 2510 PRINT 1 OUTPUT 15 CLS Clear 2510 st
112. or conditioning circuits In this example measurement using 10kQ thermistor is assumed Sensor conditioning for other thermistor ranges and sensor types is similar Figure 4 6 Sensor conditioning for 10kQ thermistor 15V THPFBK SHUNT_10K 10K MEAS_10K Models 2510 and 2510 AT Troubleshooting 4 11 A constant current is forced through the DUT thermistor as well as a reference resistor in this example 10kQ for the 10kQ range As various phases of the measurement cycle the volt ages across the DUT and 10kQ reference resistor are measured and the actual DUT resistance is computed from the ratio of the two voltages Since the resistance of the 10kQ reference resis tance is accurately known as determined during instrument calibration the DUT resistance and a given temperature can be accurately determined and internal software converts the resis tance into an equivalent temperature reading A D converter The Model 2510 unit uses a multi slope charge balance A D converter with a single slope run down The converter is controlled by a gate array Commands are issued by the MPU to the gate array and the gate array IC sends A D reading data back to the MPU for calibration and processing PID hardware loop control Figure 4 7 shows an overall diagram of the hardware aspects of the PID control loop Figure 4 7 PID hardware control loop 20 15V MEAS TEMP_REF Models 2510
113. oting Models 2510 and 2510 AT Introduction This section of the manual will assist you in troubleshooting and repairing the Model 2510 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 at the end of Section 6 Safety considerations WARNING The information in this section is intended for qualified service personnel only Do not perform these procedures unless you are qualified to do so Some of these procedures may expose you to hazardous voltages that could cause personal injury or death Use caution when working with hazardous voltages Repair considerations Before making any repairs to the Model 2510 be sure to read the following considerations CAUTION The PC boards are built using surface mount techniques and require spe cialized equipment and skills for repair If you are not equipped and or qualified it is strongly recommended that you send the unit back to the factory for repairs or limit repairs to the PC board replacement level Without proper equipment and training you could damage a PC board beyond repair Repairs will require various degrees of disassembly however it is recommended that the Front Panel Tests be performed prior to any disassembly The disassembly instruc tions for the Model 2510 are contained in Section 5 of this manual Do not make repairs to surface mount PC
114. pe temperature sensor SENS TEMP TRAN THER 3 Send the following command to enable 4 wire sensing 5 ON 4 Send this command to select the 1000 resistance range SENS TEMP THER RANG 100 5 Send the following command with the characterized 100Q resistance value as the parameter to calibrate the 1000 range CAL PROT SENS TEMP Resistance Value 6 Short the INPUT terminals with clean copper wire Figure 2 4 Allow one minute for thermal equilibrium then send this command CAL PROT SENS TEMP 0 7 Connect the 1kQ resistor to the Model 2510 INPUT terminals Figure 2 3 8 Send this command to select the 1kQ resistance range SENS TEMP THER RANG 163 9 Send the following command with the characterized 1kQ resistance value as the param eter to calibrate the 1kQ range CAL PROT SENS TEMP Resistance Value 10 Short the INPUT terminals with clean copper wire Figure 2 4 Allow one minute for thermal equilibrium then send this command CAL PROT SENS TEMP 0 11 Connect the 10kQ resistor to the Model 2510 INPUT terminals Figure 2 3 12 Send this command to select the 10k resistance range SENS TEMP THER RANG 164 13 Send the following command with the characterized 10k resistance value as the parameter to calibrate the 10 range CAL PROT SENS TEMP Resistance Value 14 Short the INPUT terminals with clean copper wire Figure 2 4 Allow one minute for thermal equilibrium then send this command CAL PROT SE
115. protective de vices 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 con necting cables test leads and jumpers for possible wear cracks or breaks before each use When installing equipment where access to the main power cord is restricted such as rack mounting a separate main input pow er disconnect device must be provided in close proximity to the equipment and within easy reach of the operator 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 ca 2 02 bles 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 Al ways make measurements with dry hands while standing on a dry insulated surface capable of withstanding the voltage being measured The instrument and accessories must be used in accordance with its specifications and operating instructions or the safety of the equipment may be impaired Do not exceed the maximum signal levels of the instruments and accessories as defined in the specifications and operating in form
116. quipment for the calibration procedures You can use alternate equipment as long that equipment has specifications at least as good as those listed in the table For optimum calibration accuracy test equipment specifications should be at least four times better than corresponding Model 2510 specifications 2 4 Calibration Models 2510 and 2510 AT Table 2 1 Recommended calibration equipment Description Manufacturer Model Specifications Digital Multimeter Keithley 2002 DC Voltage 20V 6 8ppm Resistance 202 23ppm 2002 19ppm 2kQ 7 4ppm 20 0 7 4ppm 200kQ 29 8ppm Resistors Isotec RUG Z 1R00 0 1 1Q 0 1 100W 1000 1 1kQ 1 10kQ 1 100kQ 1 INPUT OUTPUT Keithley CS 846 Mating Connector Clean Copper Wire 18 22 AWG 3 Ninety day full range accuracy specification of ranges required for various measurement points 4 Characterize all resistors using 4 wire ohms function of recommended DMM before use 5 One connector supplied with Model 2510 Resistor characterization The resistors listed in Table 2 1 must be characterized using the 4 wire ohms function of the recommended DMM before use Be sure to use the lowest resistance range possible for each measurement for best accuracy Record the characterized values in Table 2 2 Table 2 2 Characterized resistor values Nominal resistance 10 1000 1kQ 10kQ 100kQ Characterized resistance Q Q kQ kQ kQ Characterize
117. racy 1 10 Accuracy calculations A 5 Analog circuitry checks 4 17 Assembly drawings 5 3 Block diagram Analog circuitry 4 6 Digital circuitry 4 13 Overall 4 5 Power supply 4 12 Calibration 2 1 Calibration commands B 2 Calibration considerations 2 3 Calibration cycle 2 3 Recommended calibration equipment 2 3 Resistor characterization 2 4 Calibration equipment C 2 Calibration errors 2 7 B 11 Front panel error reporting 2 7 Remote error reporting 2 7 Calibration menu 2 5 Calibration Program C 1 Calibration Reference B 1 Calibration step summary 2 9 Case cover removal 5 4 Changing the password 2 6 by remote 2 6 from the front panel 2 6 Characterized resistor values 1 4 2 4 Class D Amplifier 4 6 Command summary B 2 Component layouts 6 2 Computer hardware requirements C 2 Connections AC ohms calibration 2 18 Current and current protection calibration 2 11 for AC resistance verification test 1 11 for current verification tests 1 9 for sensor resistance accuracy verification 1 12 for voltage verification tests 1 7 1 55 and V SS calibration resistor 2 15 Shorted input calibration 2 13 Thermistor and RTD calibration resistor 2 12 voltage calibration 2 9 Current accuracy 1 8 limit 1 10 Output 1 8 readback 1 9 DAC commands B 9 IPDac B 9 Detecting calibration errors B 10 Error summary B 10 Generating an SRQ on error B 10 Reading the error queue B 10 Status byte EAV Error Available bit B 10 Detecting calibrat
118. ration PROTected IPDac CALibration PROTected IPDac DATA Purpose To calibrate the current protection DAC Format cal prot ipd Query cal prot ipd data Description The CAL PROT IPD command calibrates the current protection DAC A resistor of less than 1 50 must be connected to the OUTPUT terminals before this command is sent The CAL PROT IPD DATA query allows you request the current protec tion DAC calibration parameters Example CAL PROT IPD Calibrate current protection DAC RESistance commands RESistance CALibration PROTected RESistance AC CALibration PROTected RESistance AC DATA Purpose To calibrate the AC ohms circuit Format cal prot res Resistance Value Parameters Resistance Value 10 to 1e3 Q 100 default Query cal prot res data Description The CAL PROT RES command calibrates the Model 2510 AC ohms cir cuit 100 to 1kQ 100 preferred resistor must be connected to the OUTPUT terminals and the characterized value of that resistor is used as the CAL PROT RES command parameter The output is off The CAL PROT RES DATA query requests the AC ohms calibration constants Example CAL PROT RES 99 5 Calibrate with 1000 nominal resistor B 10 Calibration Reference Models 2510 and 2510 AT Detecting calibration errors If an error occurs during any calibration step the Model 2510 will generate an appropriate error message Several methods to detect calibration errors are dis
119. rature to stabilize Typically allow one extra hour to stabilize a unit that is 10 C 18 F outside the specified temperature range Allow the test equipment to warm up for the minimum time specified by the manufacturer Line power The Model 2510 requires a line voltage of 100 to 240V at line frequency of 50 or 60Hz The instrument must be calibrated while operating from a line voltage within this range Models 2510 and 2510 AT Calibration 2 3 Calibration considerations WARNING maximum common mode voltage voltage between INPUT OUTPUT terminals and chassis ground is 30V DC Exceeding this value may cause a shock hazard CAUTION maximum voltage between INPUT OUTPUT sense 5 terminals is 1V Exceeding this voltage may result in instrument damage When performing the calibration procedures Make sure that the test equipment is properly warmed up and connected to the Model 2510 INPUT or OUTPUT terminals as required e Always allow the source signal to settle before calibrating each point Do not connect test equipment to the Model 2510 through a scanner or other switching equipment Ifan error occurs during calibration the Model 2510 will generate an appropriate error message See Appendix B for more information Calibration cycle Perform calibration at least once a year to ensure the unit meets or exceeds its specifications Recommended calibration equipment Table 2 1 lists the recommended e
120. rcuits 4 6 Digital circuitry 4 13 Display board circuits 4 15 Overall block diagram 4 5 Power supply 4 12 Rear panel 3 2 Recommended calibration equipment 2 4 Recommended test equipment 1 3 Resistor characterization 1 4 Recommended verification equipment 1 3 Remote calibration 2 20 command summary 2 20 procedure 2 21 Remote calibration command summary 2 20 Removing power components 5 5 Fan removal 5 6 Power module removal 5 6 Power supply module removal 5 5 Repair considerations 4 2 Replaceable Parts 6 1 Resetting the calibration password 2 7 RESistance commands B 9 RESistance B 9 Restoring factory defaults 1 5 Routine Maintenance 3 1 Safety considerations 4 2 SENSe commands B 6 CURRent B 6 TEMPerature 7 VOLTage B 6 Sensor conditioning 4 10 Sensor measurement accuracy 1 11 Sensor resistance measurement accuracy limits 1 13 Software requirements C 2 SOURce commands B 8 AUTO B 8 SOURCE B 8 Specifications A 1 Static sensitive devices 5 3 Troubleshooting 4 1 4 15 Analog circuitry checks 4 17 Digital circuitry checks 4 16 Display board checks 4 15 Power supply checks 4 16 Unlocking calibration 2 5 by remote 2 6 from the front panel 2 5 Verification limits 1 4 Example limits calculation 1 4 Resistance limits calculation 1 4 Verification test requirements 1 2 Environmental conditions 1 2 Line power 1 3 Warm up period 1 2 Viewing calibration dates and calibration count 2 7 Voltage accuracy 1 6 lim
121. s Centre Frosundaviks All 15 4tr 169 70 Solna 08 509 04 679 Fax 08 655 26 10 Kriesbachstrasse 4 8600 D bendorf 01 821 94 44 Fax 01 820 30 81 1FL 85 Po Ai Street Hsinchu Taiwan R O C 886 3 572 9077 Fax 886 3 572 9031 Copyright 2001 Keithley Instruments Inc Printed in the U S A 4 02
122. t the case cover and mother board be removed as previously explained Power supply module removal Perform the following steps to remove the power supply module 1 Remove the wires that connect the power supply module to the rear panel power module Remove any cable clamps or cable ties that secure the power supply module wires 3 Remove the screws that secure the power supply to the chassis bottom then remove the module 5 6 Disassembly Models 2510 and 2510 AT Power module removal Perform the following steps to remove the rear panel power module 1 Disconnect the power module s ground wire This green and yellow wire connects to a threaded stud on the chassis with a kep nut 2 Squeeze the latches on either side of the power module while pushing the module from the access hole Fan removal 1 Remove the two nuts that secure the fan to the rear of the chassis 2 Remove the fan from the chassis Instrument reassembly Reassemble 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 sure the four bottom case screws are properly installed to secure and ground the case cover to the chassis
123. tage or to voltage sources with high tran sient over voltages Installation Category II connections require protection for high transient over voltages often associated with local AC mains connections Assume all measurement control and data I O connections are for connection to Category I sourc es unless otherwise marked or described in the Manual 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 Operators of this product must be protected from electric shock at all times The responsible body must ensure that operators are prevented access and or insulated from every connection point In some cases connections must be exposed to potential human contact Product operators 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 Do not connect switching cards directly to unlimited power circuits They are intended to be used with impedance limited sourc es NEVER connect switching cards directly to AC mains When connecting sources to switching cards install
124. tecting calibration errors 2 B 10 Reading the error queue 2 B 10 Error summiaty pinire B 10 Status byte EAV Error Available bit B 10 Generating an SRQ on error eee B 10 Detecting calibration step completion B 12 Using the OPC B 12 Using the OPC command eee B 12 Generating an SRQ on calibration complete B 13 Calibration Program Introd CtlOn ies aaner aaro p es E ir a C 2 Computer hardware requirements C 2 Software requirements C 2 Calibration equipment sese enne C 2 General program instructions C 3 Program C 1 Model 2510 calibration program 4 List of Illustrations 1 Figure 1 1 Figure 1 2 Figure 1 3 Figure 1 4 2 Figure 2 1 Figure 2 2 Figure 2 3 Figure 2 4 Figure 2 5 Figure 2 6 3 Figure 3 1 4 Figure 4 1 Figure 4 2 Figure 4 3 Figure 4 4 Figure 4 5 Figure 4 6 Figure 4 7 Figure 4 8 Figure 4 9 Figure 4 10 Performance Verification Connections for voltage verification tests 1 7 Connections for current verification tests 1 9 Connections for AC resistance
125. terminals GOSUB KeyCheck END SELECT PRINT 1 OUTPUT 15 Cmd OPC GOSUB CalEnd GOSUB ErrCheck NEXT I LINE INPUT Enter calibration date yyyy mm dd D PRINT 1 OUTPUT 15 CAL PROT DATE D LINE INPUT Enter calibration due date yyyy mm dd D PRINT 1 OUTPUT 15 CAL PROT NDUE D PRINT 1 OUTPUT 15 CAL PROT SAVE Save calibration constants GOSUB ErrCheck PRINT 1 OUTPUT 15 CAL PROT LOCK Lock out calibration PRINT Calibration completed PRINT 1 LOCAL 15 16 CLOSE END KeyCheck Check for key press routine WHILE INKEYS 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 CalEnd Check for cal step completion DO PRINT 1 SRQ Request SRQ status INPUT 2 S Input SRQ status byte LOOP UNTIL S Wait for operation complete PRINT 1 OUTPUT 15 ESR Clear OPC PRINT 1 ENTER 15 INPUT 2 S PRINT 1 SPOLL 15 Clear SRQ INPUT 2 S RETURN C 6 Calibration Program ErrCheck PRINT 41 OUTPUT 15 SYST ERR PRINT 1 ENTER 15 INPUT 42 E Err Models 2510 and 2510 AT Error check routine Query error queue IF E 0 THEN PRINT Err GOTO ErrCheck Display error RETURN ReadDMM SLEEP 3 PRINT 1 OUTPUT 16 RE
126. the following RTD CAL Connect 1000 to temperature p gt 4 sensor and press ENTER 33 Connect the 1000 resistor to the Model 2510 INPUT terminals Figure 2 3 34 Press ENTER The Model 2510 will display the following RES VALUE 0 100000kQ Use 4 gt A V ENTER or EXIT 35 Adjust the display to agree with the value of the 1000 resistor then press ENTER The unit will display the following RTD CAL Connect a Short to temperature p sensor and press ENTER 36 Short all four INPUT terminals together using clean copper wire see Figure 2 4 Allow one minute for thermal equilibrium 37 Press ENTER The Model 2510 will display the following RES VALUE 00 000000 Use 4 gt A V ENTER or EXIT 38 Press ENTER to complete the shorted calibration step then remove the shorting wires from the INPUT terminals 39 Connect the 1kQ resistor to the Model 2510 INPUT terminals Figure 2 3 40 Press ENTER The Model 2510 will display the following RES VALUE 01 00000kQ Use 4 gt A V ENTER or EXIT 41 Adjust the display to agree with the value of the 1k resistor then press ENTER The unit will display the following RTD CAL Connect a Short to temperature p sensor and press ENTER 42 Short all four INPUT terminals together using clean copper wire see Figure 2 4 Allow one minute for thermal equilibrium 43 Press ENTER The Model 2510 will display the following RES VALUE 00 000000 Use 4 P
127. the instrument s one year accuracy specifications You can perform these verification procedures When you first receive the instrument to make sure that it was not damaged during shipment 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 Do 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 Use standard safety pre cautions when working with hazardous voltages NOTE Ifthe instrument is still under warranty and its performance is outside specified lim its contact your Keithley representative or the factory to determine the correct course of action Verification test requirements Be sure that you perform the verification tests Under the proper environmental conditions e After the specified warm up period Using the correct line voltage Using the proper test equipment Using the specified output signals and reading limits Environmental conditions Conduct your performance verification procedures in a test environment with Anambient temperature of 18 28 C 65 82 F Arelative humidity of less than 7096 unless otherwise noted Warm up period Allow the Model 2510 t
128. the label name for that key will be displayed to indicate that it is functioning properly When the key is released the message No keys pressed 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 SELF TEST MENU Continue pressing EXIT to back out of the menu structure 4 4 Troubleshooting Models 2510 and 2510 AT DISPLAY PATTERNS test The display test lets you verify that each pixel and annunciator in the vacuum fluorescent display is working properly Perform the following steps to run the display test 1 2 3 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 panel key except EXIT is pressed the next part of the test sequence is selected The five parts of the test sequence are as follows e Checkerboard pattern alternate pixels on and all annunciators e Checkerboard pattern and the annunciators that are on during normal operation Horizontal lines pixels of the first digit are sequenced e Vertical lines pixels of the first digit are sequenced e Each digit and adjacent annunciator is sequenced All the pixels
129. tine Maintenance eet ete rte Irae t petet os 3 2 Line fuse replacement 3 2 Troubleshooting Introduction norte pre teste eret Ree 4 2 Safety considerations entente 4 2 Repair considerations 4 2 Power On self test eee tt c 4 3 Front panel tests eterne ertet eene 4 3 4 3 DISPLAY PATTERNS test 4 4 CHAR SET Ei erneiert 4 4 Principles of operation 4 5 Overall block diagram eene 4 5 Analog circuits 4 6 Power supply 4 12 Digital circuitry ettet teretes 4 13 Display board circuits eee 4 15 Troubleshooting eorr nete ere teet hene ea eee 4 15 Display board checks 81 4 15 Power supply checks 4 16 Digital circuitry checks 12 4 16 Analog circuitry 4 17 Internal fuse replacement eee 4 17 Power supply module fuse replacement 4 17 Digital I O 5V supply fuse replacement 4 18 No comm link etror o 4 18 Disassembly Introduction ele ote
130. tion 2 Configure the INPUT terminals for 4 wire sensing as follows e Press CONFIG then T Select SENSOR TYPE then press ENTER Choose THERMISTOR then press ENTER Select SENSE MODE then press ENTER Choose 4 WIRE then press ENTER Press EXIT as required to back out of the menu structure and return to normal display 3 Pressthe MENU key choose CAL and press ENTER Select UNLOCK and then press ENTER The instrument will display the following PASSWORD Use 4 P A V ENTER or EXIT 4 Use the A and V keys to select the letter or number and use the 4 and gt arrow keys to choose the position Press W for letters A for numbers Enter the present password on the display Front panel default 002510 5 Press ENTER to complete the process Select EXECUTE then press ENTER to enter the CAL EXECUTE menu Table 2 4 summarizes the various menu selections and calibration steps which are covered in more detail throughout the procedure Models 2510 and 2510 AT Table 2 4 Calibration step summary Calibration 2 9 Function Calibration step Test connections VOLTAGE Output 8 5V DMM to OUTPUT terminals Figure 2 1 Output 0V DMM to OUTPUT terminals Figure 2 1 Output 8 5V DMM to OUTPUT terminals Figure 2 1 CURRENT 1Q resistor 1Q resistor to OUTPUT terminals Figure 2 2 J PROTECTION 1Q resistor 1Q resistor to OUTPUT terminals Figure 2 2 TEMPERATURE THERMISTOR 1000 resistor short 1000 resistor th
131. tput voltage accuracy Follow the steps below to verify that Model 2510 output voltage accuracy is within specified limits This test involves setting the output voltage to a specific value and accurately measuring the voltage with a DMM 1 With the power off connect the digital multimeter to the Model 2510 OUTPUT termi nals as shown in Figure 1 1 Turn on the Model 2510 and DMM and allow them to warm up for at least one hour Select the multimeter DC volts measuring function and choose the 20V range Bow Press the Model 2510 V key to select the voltage function and make sure the source output is turned on 1 7 Performance Verification Models 2510 2510 AT Using the EDIT keys adjust the Model 2510 voltage setpoint to exactly 9 000V Verify that the DMM reading is within 8 987 to 9 013V limits Repeat steps 5 and 6 for a 9 000V output value 99 c Oy Turn off the output when the test is completed Figure 1 1 Connections for voltage verification tests INPUT S INPUT F INPUT S KEITHLEY y INPUT INPUT LO 4 2 ED GAT gt POWER MZ PHOTECTON GANT FRE ADIPE FUSE WITH SAMME TYPE AND AT Model 2002 DMM Model 2510 0 Gam Cem jene Voltage readback accuracy Follow the steps below to verify that Model 2510 voltage readback accuracy is within speci fi
132. ultimeter DC voltage measuring function and set the unit to the 20V range Press the Model 2510 V key to select the voltage function Using the EDIT keys adjust the Model 2510 voltage setpoint to 10 000V Press CONFIG then V select PROTECTION then set the voltage limit to 9 00V Turn the source output on Verify that the message is displayed then note the DMM voltage reading Verify that the voltage measured in step 8 is within 8 55 to 9 45V limits Turn off the output when the test is completed Current accuracy Output current accuracy Follow the steps below to verify that Model 2510 output current accuracy is within specified limits The test involves setting the output current to a specific value and measuring the current using a 1Q resistor and a digital multimeter 1 With the power off connect the digital multimeter and 10 resistor to the Model 2510 OUTPUT terminals as shown in Figure 1 2 Turn on the Model 2510 and the DMM and allow them to warm up for one hour Select the multimeter DC voltage measuring function and set the unit to the 20V range Press CONFIG then I choose PROTECTION then set the current limit to 5 00A Press the Model 2510 I key to select the current function and make sure the source out put is turned on Using the EDIT keys adjust the Model 2510 setpoint to exactly 4 5000A Compute the current as follows I V R where V is the DMM voltage reading and R is the char a
133. value using DMM see Table 2 1 Models 2510 and 2510 AT Calibration menu Calibration Table 2 3 summarizes the main calibration menu selections To enter the calibration menu press the MENU key select CAL then press ENTER Use the EDIT keys to move the cursor and scroll through menu selections Press ENTER to select a MENU item Table 2 3 Calibration menu Menu selection Description UNLOCK Unlock calibration using password default 002510 EXECUTE Execute calibration steps VOLTAGE Voltage calibration CURRENT Current calibration I PROTECTION Current protection calibration TEMPERATURE Temperature calibration AC OHMS AC resistance calibration V SOURCE Voltage source calibration VIEW DATES View calibration dates SAVE Save calibration constants LOCK Lock out calibration CHANGE PASSWORD Change calibration password Unlocking calibration Before performing calibration you must first unlock calibration by entering or sending the calibration password as explained in the following paragraphs Unlocking calibration from the front panel 1 Press the MENU key choose CAL and press ENTER The instrument will display the following CALIBRATION UNLOCK EXECUTE VIEW DATES gt lt q SAVE LOCK CHANGE PASSWORD Select UNLOCK and then press ENTER The instrument will display the following PASSWORD Use 4 P A V ENTER or EXIT Use the A and V keys to select the letter or number and use th
134. verification test 1 11 Connections for sensor resistance accuracy verification 1 12 Calibration Voltage calibration connections 2 9 Current and current protection calibration connections 2 11 Thermistor and RTD calibration resistor connections 2 12 Shorted input calibration connections 2 13 I SS and V SS calibration resistor connections 2 17 AC ohms calibration connections see 2 18 Routine Maintenance Rear panel zone eni mna egg 3 2 Troubleshooting Overall block diagram esee 4 5 Block diagram of analog circuits eee 4 6 Simplified schematic of class D amplifier 4 7 Simplified schematic of H bridge output stage 4 8 H bridge switching and step down regulator 4 9 Sensor conditioning for 10KQ thermistor 4 10 PID hardware control 1 4 11 Power supply block diagram 4 12 Digital circuitry overall block diagram 4 13 Digital control circuits esee 4 14 List of Tables 1 Table 1 1 Table 1 2 Table 1 3 2 Table 2 1 Table 2 2 Table 2 3 Table 2 4 Table 2 5 Table 2 6 3 Table 3 1 4 Table 4 1 Table 4 2 Table 4 3 Tab
135. x 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 C low humidity environment for several hours Models 2510 and 2510 AT Disassembly 5 3 Static sensitive devices CMOS devices operate at very high impedance 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 Model 2510 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 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 Us
136. y to agree with the DMM reading and press ENTER 13 Disconnect the DMM from the OUTPUT terminals Models 2510 and 2510 AT Calibration 2 11 Step 3 Current and current protection calibration 1 From the CAL EXECUTE menu select CURRENT then press ENTER The instru ment will display the following message CURRENT CAL Connect a 1Q load to Peltier p gt lt q Then press ENTER 2 Connect the 1Q resistor to the Model 2510 OUTPUT terminals as shown in Figure 2 2 Figure 2 2 esistor Current and current OUTPUT F OUTPUT S Connect sense S leads as close as protection calibration possible to resistor body connections OUTPUT S WARNING No INTERNAL OPERATOR SERVICABLE PARTS SERVICE BY QUALIFIED PERSONNEL ONLY a e WIT FRONT PANEL MENU ENABLE DIG 10 TRIGGER 5 232 LINE FUSE SLOWBLOW 25 250V A une rating 100240VAC 50 60 HZ SOVA MAX CAUTION For CONTINUED PROTECTION AGAINST FIRE HAZARD REPLACE FUSE WITH SAME TYPE AND RATING j Model 2510 3 Press ENTER The Model 2510 will display the following RES VALUE 1 00000Q Use P A V ENTER or EXIT 4 Adjust the Model 2510 display to agree exactly with the characterized value of the 1 2 resistor then press ENTER 5 Select I PROTECTION then press ENTER The instrument will then display the following CURRENT PROTECTION Connect 1Q load to Peltier p gt lt q Then press ENTER 6 With the 1Q r

Models 2510 and 2510-AT

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