Keithley 7021 User Manual Download

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Summary of Contents for 7021

Page 1: ...cess underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Dem...

Page 2: ...Instruction Manual Contains Operating and Servicing Information Model 7021 Multiplexer Digital I O Card Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...

Page 3: ...E AND EXCLUSIVE REMEDIES NEITHER KEITHLEY INSTRUMENTS INC NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT INDI RECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS IN...

Page 4: ...nstruction Manual 1997 Keithley Instruments Inc All rights reserved Cleveland Ohio U S A First Printing May 1997 Document Number 7021 901 01 Rev A Artisan Scientific Quality Instrumentation Guaranteed...

Page 5: ...e num bered 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...

Page 6: ...re measuring Users of this product must be protected from electric shock at all times The responsible body must ensure that users are prevented access and or insulated from every connection point In s...

Page 7: ...the associated infor mation 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 w...

Page 8: ...LO HI Output LO J J HI LO Backplane J J 5V Output VEXT GND Output Channel 1 of 10 5V Input GND Input Channel 1 of 10 10K 10K 10K Multiplexer Configuration Digital I O Configuration DIGITAL I O SPECIF...

Page 9: ...shipment 1 3 Optional accessories 1 3 2 Multiplexer Configuration Introduction 2 1 Basic multiplexer configurations 2 1 Multiplexer bank to bank jumpers 2 2 Backplane jumpers 2 2 Typical multiplexer s...

Page 10: ...cal multiplexer connection schemes 4 9 Single card system 4 10 Two card system 4 11 Two mainframe system 4 12 Typical digital I O connection schemes 4 14 Output connection schemes 4 14 Input connectio...

Page 11: ...d common mode isolation tests 6 11 Channel functionality test 6 13 Special handling of static sensitive devices 6 13 Principles of operation 6 14 Block diagram 6 14 ID data circuits 6 15 Multiplexer r...

Page 12: ...igure 2 11 Multiplexer input expansion example 2 7 Figure 2 12 Mixed card type example 2 8 3 Digital I O Configuration Figure 3 1 Output configuration for pull up devices 3 1 Figure 3 2 Output configu...

Page 13: ...esting 5 7 Figure 5 6 Four wire resistance testing 5 8 Figure 5 7 Low resistance testing 5 10 Figure 5 8 Configuration for current gain and common emitter test 5 11 Figure 5 9 Typical common emitter c...

Page 14: ...3 Channel to channel isolation test summary 6 10 Table 6 4 Differential and common mode isolation testing 6 13 Table 6 5 Recommended troubleshooting equipment 6 17 Table 6 6 Troubleshooting procedure...

Page 15: ...21 has two pole independent 1 12 and 1 18 multiplex banks and ten independent inputs and outputs for both multiplexer and digital I O capabilities Some of the key features include Low contact potentia...

Page 16: ...y or death Always read the associated information very carefully before per forming the indicated procedure The CAUTION heading used in this manual explains haz ards that could damage the card Such da...

Page 17: ...the unit in its original packing carton or the equivalent and include the following information Advise as to the warranty status of the card Write ATTENTION REPAIR DEPARTMENT on the shipping label Fi...

Page 18: ...B Bank A 3 Note Factory configuration shown Bank to Bank Jumpers HI LO HI LO Backplane Jumpers to 7001 7002 Analog Backplane 1 HI LO Jumpers HI LO A B Switching Topology for all Channels HI LO Input 1...

Page 19: ...he multiplex banks of one card connect to the multiplex banks of a second card through the analog backplane of the Model 7001 7002 main frame which expands the number of inputs With the jump ers remov...

Page 20: ...emes The following paragraphs describe some basic switching schemes that are possible with a two pole switching multi plexer These switching schemes include some various shielding configurations to he...

Page 21: ...can be configured to use instruments that have sensing capability The main advantage of using sensing is to cancel the effects of switch card path resistance 1 25 and the resistance of external cablin...

Page 22: ...ystem mainframe can accommodate up to ten cards And by connecting up to six Model 7002 mainframes 60 cards can be configured The limits on the number of cards in the Model 7001 7002 are due to trigger...

Page 23: ...me By leaving the backplane jumpers installed the multiplex banks of the card installed in slot 1 CARD 1 are automatically connected to the multiplex banks of the card installed in slot 2 CARD 2 throu...

Page 24: ...stalled in an ad jacent slot Figure 2 12 shows a possible switching system using a ma trix and a multiplexer The backplane jumpers for both the matrix and multiplexer must be installed This allows mat...

Page 25: ...001 7002 switch system are due to triggering Section 4 explains how to connect a test system using two mainframes 1 2 3 4 Columns 7022 Rows Card 1 5x6 Matrix 7021 Card 2 Dual 1x12 and 1x18 Mux Bank A...

Page 26: ...Refer to Section 4 to configure the logic to your requirement Controlling pull up devices Typically the digital outputs are used to provide drive for rel atively high current devices such as solenoid...

Page 27: ...s to high impedance devices i e logic devices internal pull up resistors are used to achieve the appropriate logic level Figure 3 2 shows the output con figuration using the 10k pull up resistor RP Th...

Page 28: ...channel the input is pulled high to 5V which displays the channel as on When the resistor is connected to ground the channel is pulled low Thus with nothing connected to the channel the input is pull...

Page 29: ...Digital I O Configuration 3 4 Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...

Page 30: ...rd and two mainframe system configurations Typical digital I O connection schemes Provides some typical connection schemes for output solenoid relay motor and logic device control and for input micro...

Page 31: ...he backplane row jumpers 1 If mated together separate the relay card from the con nector card by removing the mounting screw and then pulling the two cards away from each other Remember to only handle...

Page 32: ...ion 2 Refer to Figure 4 2 to determine which jumpers to in stall or remove 3 Using Figure 4 3 as a guide install the jumpers on or remove the jumpers from the appropriate terminal pairs Figure 4 3 Ban...

Page 33: ...nector card by removing the mounting screw and then pulling the two cards away from each other Remember to only handle the cards by the edges and shields to avoid contamination 2 Locate J101 on the r...

Page 34: ...y the edges and shields to avoid contamination Keithley has a variety of cable and connector accessories available to accommodate connections from the connector card to test instrumentation and DUTs d...

Page 35: ...annel 24 58 26b H L 31 31a Channel 29 92 28c H L 30 30a Channel 30 62 30b H L Output 64 32b 32 32a H L 43 11b Channel 1 75 11c H L 13 13a Channel 2 74 10c H L 14 14a Channel 6 46 14b H L 47 15b Channe...

Page 36: ...n 7 HI 15b 47 Chan 22 HI 25b 57 DIG OUT 39 6c 70 Chan 7 LO 15c 79 Chan 22 LO 25c 89 DIG OUT 40 8c 72 Bank B Chan 8 HI 17a 17 Bank B Chan 23 HI 27a 27 DIG IN 1 3a 3 Chan 8 LO 14c 78 Chan 23 LO 24c 88 D...

Page 37: ...via the main frame backplane from appearing on the pins of the male DIN connector The output relays will only close when the Model 7011 MTC 2 cable assembly is connected to the card If building your...

Page 38: ...o of these cables can be used to provide 100 conductors The connector has solder cups to accommodate the individ ual wires of the unterminated cable Figure 4 12 provides an exploded view of the connec...

Page 39: ...using the Model 7011 MTC 2 round cable assembly This cable mates direct ly to both the external bulkhead connector and the Model 7021 Notice that the bulkhead connector is shown mounted to a fixture t...

Page 40: ...er system Each card is configured as a single 1 30 multiplexer To accomplish this all bank to bank jumpers both cards are installed to connect banks A and B together By leaving the backplane jumpers o...

Page 41: ...ltiplexer system Each card is configured as a single 1 30 multiplexer To accomplish this bank to bank jumpers of all three cards must be installed to connect banks A and B together By leaving the back...

Page 42: ...tions to external circuitry A suitable round cable can be terminated with a 96 pin female DIN connector Model 7011 KIT R with two lengths of Hitachi cable P N N2807 P D 50TAB This cable contains 50 co...

Page 43: ...0 1 30 31 60 Simplified Equivalent Circuit Card 2 1x30 7001 7002 Analog Backplane Card 1 1x30 Single 1x90 Multiplexer Notes 1 Backplane jumpers for both cards installed in 7001 7002 1 must be installe...

Page 44: ...ecessary voltage level A motor is turned on when the corresponding output channel is turned on closed Figure 4 17 Digital output motor control Logic device control Figure 4 18 shows a digital output c...

Page 45: ...on the Model 7002 With a switch open and the input resistance configuration set to pull down as shown in Figure 4 19B the corresponding input channel is pulled low by the internal input resistor As a...

Page 46: ...upplied 4 40 screw at the end of the card to secure the assembly Make sure to handle the cards by the edges and shields to prevent contamination 2 Facing the rear panel of the mainframe select the slo...

Page 47: ...nd Installation 4 18 ber to handle the card by the edges and shields to avoid contamination that could degrade performance Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artis...

Page 48: ...relays never exceed the following maximum signal levels 110V DC or rms 155V peak between any two inputs or chassis 1A switched 30VA resistive load Digital I O maximum signal levels To ensure proper op...

Page 49: ...on 4 Input channels use positive true logic but can be configured to pull up or pull down Thus a channel can be pulled high or pulled low when the input is open depending on the jumper configuration I...

Page 50: ...16 B 17 B 18 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 2 10 2 11 2 12 2 13 2 14 2 15 2 16 2 17 2 18 2 19 2 20 2 21 2 22 2 23 2 24 2 25 2 26 2 27 2 28 2 29 2 30 2 31 2 32 2 33 2 34 2 35 2 36 2 37 2 38 2 39...

Page 51: ...ls paragraph However the scan list is specified from the SCAN CHANNELS display mode The SCAN LIST key toggles between the channel list and the scan list The following shows an example of a scan list S...

Page 52: ...tput 07 open all Scanning output channels There are many commands associated with scanning How ever it is possible to configure a scan using as little as four commands These commands are listed as fol...

Page 53: ...card installed in slot 1 PRINT 1 output 07 sens2 data 3 PRINT 1 enter 07 LINE INPUT 2 A PRINT A The first statement reads input channel 3 slot 1 The second statement addresses the mainframe to talk se...

Page 54: ...re cards Accuracy of measurements can be optimized by minimizing stray resistance Make connecting wires as short as possible to minimize path resistance Another technique is to short one of the multip...

Page 55: ...wo poles of switching are required for each resistor tested For this reason only 12 re sistors per card can be tested using this configuration be cause two channels must close at the same time Figure...

Page 56: ...measurement accuracy unless steps are taken to avoid them The Model 7021 has been designed to keep relay EMF at a minimal level Thermal EMF effects can be virtually eliminated by taking two voltage m...

Page 57: ...measuring the collector current IC The DC common emitter current gain of the transistor is then determined as follows Figure 5 8 shows the test configuration and equivalent cir cuit for the current ga...

Page 58: ...current range on the Model 2000 DMM Doing so will result in the loss of one or two decades of resolution but 3 1 2 or 4 1 2 digit resolution will probably be adequate for most situations HI LO POWER...

Page 59: ...test capabilities of that system The follow ing paragraphs discuss an overall multiplexer matrix switching system and also briefly outline a typical test that can be made with such a system Multiplex...

Page 60: ...th the equivalent resistance of the DUT as shown in Figure 5 11 For low to medium device resistance values path isolation resistance is seldom a consideration however it can seriously degrade measurem...

Page 61: ...sources as in the case of arcing in high volt age environments In either case the effect on the measure ment can be considerable if enough of the unwanted signal is present RFI can be minimized in se...

Page 62: ...esent in the air can be deposited on the insulator surface To avoid these problems never touch the connector insulat ing material In addition the multiplexer digital I O card should be used only in cl...

Page 63: ...Operation 5 16 Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...

Page 64: ...recautions Handling and cleaning precautions Because of the high impedance areas on the Model 7021 care should be taken when handling or servicing the card to prevent possible contamination which coul...

Page 65: ...y of less than 70 Recommended equipment Table 6 1 summarizes the equipment necessary for perfor mance verification along with an application for each unit Multiplexer connections The following informa...

Page 66: ...n bank A inputs It is recommended that the physical connections be made at the inputs of bank A as shown in Figure 6 1 7 Connect INPUT LO and INPUT 4 WIRE LO to the HI H terminal of bank A 8 Install t...

Page 67: ...ain frame 6 Turn on the Model 7001 7002 7 Program the unit to close channel 1 1 bank A input 1 8 On the Model 6517A disable zero check and allow the reading to settle Verify that the reading is 100pA...

Page 68: ...L B Common Mode Bank Inputs Model 7021 WARNING NO INTERNAL OPERATOR SERVICABLE PARTS SERVICE BY QUALIFIED PERSONNEL ONLY WARNING NO INTERNAL OPERATOR SERVICABLE PARTS SERVICE BY QUALIFIED PERSONNEL O...

Page 69: ...n ternal offsets Leave REL READING enabled for the entire procedure 11 Turn off the mainframe Remove the Model 7021 from slot 1 Cut the short on bank B output HI to LO 12 Install the Model 7021 in mai...

Page 70: ...tion changes 5 Place the Model 6517A in the R measurement function 6 Turn on and program the Model 7001 7002 to close chan nels 1 1 and 1 4 bank A input 1 and bank B input 4 7 On the Model 6517A sourc...

Page 71: ...6 5 Channel to channel isolation test connections Model 7021 Bank Outputs Bank Inputs A H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L B H L H L Model 6517A Note Setup shown i...

Page 72: ...k A Input 12 to Bank B Input 13 Bank A and Bank B 1 12 and 1 13 7 Bank A Input 16 to Bank B Input 14 Bank A and Bank B 1 16 and 1 14 8 Bank A Input 17 to Bank B Input 15 Bank A and Bank B 1 17 and 1 1...

Page 73: ...nk B Input 5 Bank B Input 5 to Bank B Input 8 Bank B Input 8 to Bank B Input 9 Bank B Input 9 to Bank B Input 10 Bank B Input 10 to Bank B Input 13 Bank B Input 13 to Bank B Input 14 Bank B Input 14 t...

Page 74: ...in slot 1 CARD 1 and turn on the mainframe 7 Make sure all the relays are open 8 On the Model 6517A source 100V 9 After allowing the reading on the Model 6517A to settle verify that it is 1G 109 This...

Page 75: ...L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L B H L H L Model 6517A Note Setup shown is configured to test isolation between Bank A and chassis ground WARNING NO INTERNAL OPERATOR...

Page 76: ...ese devices will be received in anti static containers made of plastic or foam Keep these parts in their original containers until ready for in stallation or use 2 Remove the devices from their protec...

Page 77: ...n information multiplexer relay drivers and relays and digital I O output channel drivers and digital I O input channel registers These various elements are dis cussed in the following paragraphs Figu...

Page 78: ...ig nal it receives 4 Once all data is received the mainframe sends a stop command which is a low to high transition of the ID DATA line with the IDCLK line held high Figure 6 10 Multiplexer relay cont...

Page 79: ...n put channel registers U102 contains eight channels and U101 contains two channels When the digital inputs are read the STROBE line goes high to latch the input channel information The INCLOCK line t...

Page 80: ...ering tool such as a solder sucker to clear each mounting hole completely free of solder Each relay pin must be free to move in its mounting hole before removal Also make certain that no burrs are pre...

Page 81: ...e 6 U110 pin 6 IDCLK pulses During power up only 7 U110 pin 5 IDDATA pulses During power up only 8 U106 pin 7 STROBE pulse End of relay update sequence 9 U106 pin 2 CLK pulses During relay update sequ...

Page 82: ...er 7021 2 Card serial number 3 Part description 4 Circuit description if applicable 5 Keithley part number Factory service If the card is to be returned to Keithley Instruments for repair perform the...

Page 83: ...EJECTOR ARM 7011 301B IC SERIAL EPROM 24C01P IC 737 ROLL PIN FOR EJECTOR ARMS DP 6 1 SHIELD 7011 305C STANDOFF 2 CLEARANCE ST 204 1 C100 112 114 115 118 121 122 125 CAP 0 1 F 20 50V CERAMIC C 365 1 C1...

Page 84: ...ERIAL IN LATCH DRIVER 5841A IC 536 U110 EPROM PROGRAM 7021 800A01 U111 IC HEX INVERTER 74HCT04 IC 444 U112 IC QUAD 2 INPUT OR 74HCT32 IC 443 U113 IC HIGH SPEED BUFFER 74HC125 IC 451 U114 IC RETRIG MON...

Page 85: ...ONN BERG CS 339 J202 203 CONN SHIM 7011 309A J1004 CONN 96 PIN 3 ROW CS 514 K201 202 RELAY ULTRA SMALL POLARIZED TF2E 4 5V RL 162 P1002 1003 CONNECTOR 48 PIN 3 ROW CS 748 3 Q201 TRANS NPN SILICON 2N39...

Page 86: ...Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...

Page 87: ...Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...

Page 88: ...Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...

Page 89: ...Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...

Page 90: ...Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...

Page 91: ...THLEY INSTRUMENTS INC KEITHLEY DO NOT SCALE THIS DRAWING APPR D R N SCALE DATE P G TITLE NO C DATE ENG REVISION ECA NO LTR 1 1 A B C D D C B A 4 3 2 4 3 2 CAB 1 6 97 1 1 COMPONENT LAYOUT CONNECTOR BOA...

Page 92: ...NA FILE 7021 174 06 01A 7021 175 06A 0 6 PTH 010 025 010 007 003 SEE NOTE 7 SIDE 01 SEE NOTE 8 SIDE 01 SOLDERMASK ARTWORK CONTAINS SELECTED AREAS OF SOLDERMASK RELIEF ON GUARD TRACES SEE NOTE 9 SIDE...

Page 93: ...l tests 6 6 Controlling devices using pull up resistors 3 2 Controlling pull up devices 3 1 Current gain tests 5 10 D Differential and common mode isolation tests 6 11 Differential switching 2 4 Digit...

Page 94: ...terference 5 14 Reading digital I O input channels 5 6 Reading input channels 5 4 Recommended equipment 6 2 Repacking for shipment 1 3 Resistor testing 5 6 S Safety symbols and terms 1 2 Scanning chan...

Page 95: ...libration only Certi cate of calibration required Data required attach any additional sheets as necessary Show a block diagram of your measurement system including all instruments connected whether po...

Page 96: ...Keithley Instruments Inc 28775 Aurora Road Cleveland Ohio 44139 Printed in the U S A Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...

Page 97: ...uipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentat...

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