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Keithley 7012-S Instruction Manual Download Page 19

 

Matrix Switching Basics

 

2-2

 

The three-pole analog backplane of the mainframe is
shown in Figure 2-2. It is through this analog back-
plane where the rows of a Model 7012 matrix card in-
stalled in one slot can be connected to the rows (or
banks) of a compatible card installed in the other slot of
the mainframe. 

Figure 2-3 shows how each row of the Model 7012 is
connected to the backplane. Notice that, since the Mod-
el 7012 is a two-pole card, there is no connection made
to the Guard terminal of the backplane. The Model
7012 is shipped from the factory with the backplane
row jumpers installed. 

Removing (cutting) the backplane jumpers isolates the
card from the backplane, and subsequently, any card
installed in the other slot. For information on removing
the jumpers, refer to paragraph 3.3.1. 

 

NOTE

 

The Model 7001 does not provide an
analog backplane for the non-701X se-
ries cards. As a result, anyone of these
cards installed in one slot in the main-
frame is electrically isolated from any
card installed in the other slot. The only
way to connect a Model 7012 to one of
these cards is to wire them together.

Figure 2-2
Model 7001 analog backplane

Analog

Backplane

Card 1

Card 2

Model 7001

H

L

G

Row 1 or Bank A

H

L

G

H

L

G

Row 2 or Bank B

H

L

G

H

L

G

Row 3 or Bank C

H

L

G

H

L

G

Row 4 or Bank D

H

L

G

H = High

L = Low

   G = Guard

Row  = Matrix Card (7012)
Bank = Mux Card (7011)

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Summary of Contents for 7012-S

Page 1: ...ess 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 Demo...

Page 2: ...anual Contains Operating and Servicing Information Models 7012 S and 7012 C 4 10 Matrix Cards 7012 901 01 Rev B 11 93 Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan sc...

Page 3: ...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 DAM...

Page 4: ...s 7012 S and 7012 C Instruction Manual 1991 Keithley Instruments Inc All Rights Reserved Cleveland Ohio U S A Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific...

Page 5: ...urora Road Cleveland OH 44139 Technical Support 1 888 KEITHLEY Monday Friday 8 00 a m to 5 00 p m EST Fax 440 248 6168 Visit our website at http www keithley com Artisan Scientific Quality Instrumenta...

Page 6: ...manual Each new Revi sion includes a revised copy of this print history page Many product updates and revisions do not require manual changes and conversely manual corrections may be done without acco...

Page 7: ...hazardous voltage is present in any unknown circuit before measuring Users of this product must be protected from electric shock at all times The responsible body must ensure that users are prevented...

Page 8: ...AUTION heading in a manual explains hazards that could damage the instrument Such damage may invalidate the warranty Instrumentation and accessories shall not be connected to humans Before performing...

Page 9: ...ak any pin to chassis CONTACT LIFE Cold Switching 108 closures At Maximum Signal Levels 105 closures CHANNEL RESISTANCE per conductor 1 CONTACT POTENTIAL 7012 S 500 nV per contact pair Hi Lo 1 5 V per...

Page 10: ...gle ended switching 2 3 2 3 2 Differential switching 2 4 2 3 3 Sensing 2 4 2 3 4 SMU connections 2 5 2 4 Matrix expansion 2 5 2 4 1 Two card switching systems 2 5 2 4 2 Mainframe matrix expansion 2 9...

Page 11: ...Recommended equipment 5 2 5 3 3 Matrix card connections 5 3 5 3 4 Channel resistance tests 5 3 5 3 5 Offset current tests 5 4 5 3 6 Contact potential tests 5 6 5 3 7 Path isolation tests 5 7 5 3 8 Dif...

Page 12: ...r pinout 3 8 Figure 3 8 Model 7011 KIT R with cable assembly 3 8 Figure 3 9 Single card system example multi pin connector card 3 10 Figure 3 10 Single card system example screw terminal connector car...

Page 13: ...gure 5 2 Common mode offset current testing 5 5 Figure 5 3 Differential offset current testing 5 5 Figure 5 4 Contact potential testing 5 6 Figure 5 5 Path isolation testing guarded 5 8 Figure 5 6 Dif...

Page 14: ...2 Table 5 2 Path isolation tests 5 8 Table 5 3 Differential and common mode isolation testing 5 11 Table 5 4 Recommended Troubleshooting Equipment 5 15 Table 5 5 Troubleshooting procedure 5 16 v vi Ar...

Page 15: ...made via the 96 pin male DIN connector on the connector card Keithley offers a variety of optional accessories that can be used to make connections to the connector card see paragraph 1 9 The rest of...

Page 16: ...in personal injury or death Always read the associated information very carefully before performing the indicated procedure The CAUTION heading used in this manual explains hazards that could damage t...

Page 17: ...following accessories are available for use with the Model 7012 Model 7012 ST This screw terminal connector card is identical to the one provided with the Model 7012 S assembly An extra screw termina...

Page 18: ...ure 2 1 The card is con gured as a 4 10 matrix Each of the 40 crosspoints is made up of a two pole switch By closing the appropriate crosspoint switch any matrix row can be connected to any col umn in...

Page 19: ...pers isolates the card from the backplane and subsequently any card installed in the other slot For information on removing the jumpers refer to paragraph 3 3 1 NOTE The Model 7001 does not provide an...

Page 20: ...ore effective connected to circuit common Chassis ground is accessible at the rear panel of the Model 7001 2 3 1 Single ended switching In the single ended switching con guration the source or measure...

Page 21: ...he matrix card can be con g ured to use instruments that have sensing capability The main advantage of using sensing is to cancel the ef fects of matrix card path resistance 1 and the resis tance of e...

Page 22: ...LO Output LO Output LO 236 237 238 Triax Cables 3 WARNING Hazardous voltages may be present on GUARD Make sure all cable shields are properly insulated before applying power 2 3 4 SMU connections Fig...

Page 23: ...d by simply installing two as shipped Model 7012s in the Model 7001 mainframe By leaving the backplane jumpers installed the rows of the matrix card installed in slot 1 CARD 1 are automatically connec...

Page 24: ...ane Card 1 Notes Backplane jumpers on both cards must be installed 11 20 7012 Card 2 4 x 20 Matrix Columns could have a Model 7012 matrix card installed in one slot and a Model 7011 multiplexer card i...

Page 25: ...ix example 8 10 1 2 3 4 1 10 Columns 7012 Rows 7001 Analog Backplane Card 1 8 x 10 Matrix 7012 Card 2 1 2 3 4 Rows Jumpers Removed External Column Jumpers Artisan Scientific Quality Instrumentation Gu...

Page 26: ...ne jumpers must be installed 2 Model 7011 bank to bank jumpers must be removed 1 10 7011 Card 2 Quad 1 x 10 Mux 1 10 1 10 1 10 Bank A Bank B Bank C Bank D Inputs An example of a partially implemented...

Page 27: ...ws 5 6 7 or 8 Figure 2 12 cannot be connected to a column of Model 7012 1 with one ac cidental crosspoint closure Three speci c crosspoints must be closed in order to route the source signal to a colu...

Page 28: ...embly in the Model 7001 mainframe 3 2 Handling precautions To maintain high impedance isolation care should be taken when handling the relay card to avoid contami nation from such foreign materials as...

Page 29: ...PC board Using a pair of wire cutters cut one lead of each jumper Jumper installation Referring to Figure 3 1 for jumper locations perform the following steps to install backplane row jumpers 1 If ma...

Page 30: ...mp B Using your thumb and fore nger press the re taining clips inward and with your other hand remove the top half of the clamp 4 Route wires under wire guide connector shim 5 Route the wires through...

Page 31: ...tor card is provided by Figure 3 5 This connector will mate to a 96 pin female DIN con nector Keithley has a variety of cable and connector accesso ries available to accommodate connections from the c...

Page 32: ...inal Connector Desig 1a 32c Schematic Desig 1 96 Matrix Terminal Connector Desig 1a 32c Schematic Desig 1 96 Row 1 HI LO 8c 8b 72 40 Col 1 HI LO 32c 32b 96 64 Row 2 HI LO 6c 6b 70 38 Col 2 HI LO 30c 3...

Page 33: ...shed using a Model 7011 MTC 2 cable and a Model 7011 MTR bulk head connector The two meter round cable is termi nated with a 96 pin female DIN connector at each end This cable mates directly to the mu...

Page 34: ...led Wire instrumentation and DUT to bulkhead connector See Figures 3 5 and 3 7 for terminal identification B 7011 MTC 2 Cut in Half Wire directly to instrumentation and DUT Multi Pin Connector Card C...

Page 35: ...de of connector 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 a b c Note See Figure 3 5 for terminal identification Figure 3 8 Model 7011 KIT R with cable asse...

Page 36: ...When using a single card system make sure that the card remains electrically isolated from any other switching cards There are several ways to ensure iso lation for a single card in the Model 7001 mai...

Page 37: ...ument Instrument Instrument Row 1 Row 2 Row 3 Row 4 DUT 1 2 3 4 5 6 7 8 9 10 DUT 1 2 3 4 5 6 7 8 9 10 1 2 3 4 Instruments Equivalent Circuit Columns Rows Fixture for Bulkhead Connector 7011 MTR Bulkhe...

Page 38: ...Test Fixture 1 2 3 4 5 6 7 8 9 10 DUT 1 2 3 4 5 6 7 8 9 10 DUT 1 2 3 4 5 6 7 8 9 10 1 2 3 4 Instrument Instrument Instrument Instrument Instruments Equivalent Circuit Columns Rows Row 1 Row 2 Row 3 R...

Page 39: ...3 4 5 6 7 8 9 10 DUT 1 2 3 4 5 6 7 8 9 10 DUT 1 2 3 4 5 6 7 8 9 10 1 2 3 4 Instruments Backplane Row Jumpers installed Column Column CARD 1 CARD 2 Equivalent Circuit Note Backplane row jumpers for bot...

Page 40: ...ne DUT 1 2 3 4 5 6 7 8 9 10 DUT 1 2 3 4 5 6 7 8 9 10 DUT 1 2 3 4 5 6 7 8 9 10 DUT 1 2 3 4 5 6 7 8 9 10 1 2 3 4 Note Backplane row jumpers for both cards must be installed Instruments Backplane Row Jum...

Page 41: ...tion and DUT Notice that the row connections for the third matrix card are made at the instruments Figure 3 14 shows connections for the screw terminal connector card Single conductor connections are...

Page 42: ...Backplane Row Jumpers installed Column Column Column CARD 1 CARD 2 CARD 3 Equivalent Circuit External Row Jumpers Row DUT Test Fixture 1 2 3 4 5 6 7 8 9 10 DUT Test Fixture 1 2 3 4 5 6 7 8 9 10 Instru...

Page 43: ...1 2 3 4 5 6 7 8 9 10 DUT 1 2 3 4 5 6 7 8 9 10 DUT 1 2 3 4 5 6 7 8 9 10 1 2 3 4 Trigger Link Cable Note Backplane row jumpers for both cards in 7001 1 must be installed 7001 1 7001 2 Instruments Backp...

Page 44: ...to install the card in 3 Referring to Figure 3 15 for Model 7012 S installa tion or Figure 3 16 for Model 7012 C installation feed the matrix card assembly into the desired slot such that the edges of...

Page 45: ...3 18 Figure 3 15 Model 7012 S card installation in Model 7001 Lock card Unlock card Ejector Arms 2 Lock card Unlock card Ejector Arms 2 Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOU...

Page 46: ...Model 7012 C card installation in Model 7001 1 Screw 2 Unlock card 2 1 Lock card Screw Ejector Arms 2 Screw Unlock card Ejector Arms 2 Screw Lock card Artisan Scientific Quality Instrumentation Guara...

Page 47: ...l level speci cations of the card Maximum signal levels To prevent overheating or damage to the relays never exceed the following maximum signal levels DC signals 110V between any two pins termi nals...

Page 48: ...ARD 1 CARD 2 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 Open Channel Closed Channel 7001 Display 4 3 1 Channel assignments The Model 7001 has a channel status display Figure 4 1 that provides the real...

Page 49: ...1 4 3 1 1 4 1 2 4 1 3 4 1 4 4 1 1 5 1 2 5 1 3 5 1 4 5 1 1 6 1 2 6 1 3 6 1 4 6 1 1 7 1 2 7 1 3 7 1 4 7 1 1 8 1 2 8 1 3 8 1 4 8 1 1 9 1 2 9 1 3 9 1 4 9 1 1 10 1 2 10 1 3 10 1 4 10 1 2 3 4 5 6 7 8 9 10 B...

Page 50: ...ng shows an ex ample of a scan list SCAN CHANNELS 2 1 1 2 1 3 2 2 1 2 2 5 When a scan is performed the channels speci ed in the scan list will be scanned in the order that they are pre sented in the s...

Page 51: ...ine 25 to slow down the scan Also Line 5 is added to the beginning of the program to ensure that all chan nels are open before the scan is started 5 OUTPUT 707 open all 10 OUTPUT 707 RST 20 OUTPUT 707...

Page 52: ...testing 1 2 3 4 H 1 3 4 5 6 7 8 9 10 2 R1 R2 R3 R4 R1 R2 R4 R3 Model 230 Model 196 Ohms Sense Volts Ohms Volts Ohms HI Output Common Measure V or 4 terminal Source V Ohms Sense HI Volts Ohms LO Ohms...

Page 53: ...Volts Ohms HI Ohms Sense HI Ohms Sense LO Volts Ohms LO H L 1 H L 2 H L 3 H L 4 H L H L 1 2 R1 R2 R3 H L L H H L H L 196 Equivalent Circuit R4 H L 5 X X X Closed Crosspoints Rows Cols R4 H L Artisan...

Page 54: ...and 3V ranges 1G 30V range 11M 300V range 10 1M For better input impedance re quirements the Keithley Model 617 Electrometer can be incorporated into the test system to measure volt age Another facto...

Page 55: ...e V H 1 2 Model 7012 3 V 196 230 Equivalent Circuit 4 L Sense Output Sense Common R1 R2 R3 Thick Film H L H L H L H L H L H L H L R1 R2 R3 H H H H 1 2 3 4 Rows H L 5 R4 X X X X X Closed Crosspoints Co...

Page 56: ...an be expand ed to test more by simply using additional Model 7012 matrix cards The Model 7001 will accommodate two matrix cards Daisy chaining six Model 7001s expands the system to 12 matrix cards al...

Page 57: ...Law as follows Gain IC IB IE IC IB Common emitter characteristic curves A pro le of the transistor operating characteristics can be obtained by measuring the collector current over a speci ed voltage...

Page 58: ...Source I Measure V Output HI Sense HI Sense LO Output LO SMU 2 A Measure I Source V V Measure V Source I H L H L H L 7012 Rows X X X X X Closed Crosspoint Equivalent Circuit A V SMU 2 SMU 1 IC I B VB...

Page 59: ...ldom a con sideration however it can seriously degrade measurement accuracy when testing high impedance devices The voltage measured across such a device for example can be substantially attenuated by...

Page 60: ...interference over a wide range of frequencies across the spectrum Such RFI can be particularly troublesome at low signal lev els but is can also affect measurements at high levels if the problem is of...

Page 61: ...on resistance will be substantial ly reduced affecting high impedance measurement paths Oils and salts from the skin can contaminate connector insulators reducing their resistance Also contami nants p...

Page 62: ...Operation 4 16 Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...

Page 63: ...ircuits on the Model 7012 care should be taken when handling or servicing the card to prevent possible contamination which could degrade performance The following precau tions should be taken when han...

Page 64: ...Failure of any performance veri ca tion test may indicate that the matrix card is contaminated See paragraph 5 2 to clean the card 5 3 1 Environmental conditions All veri cation measurements should b...

Page 65: ...est the high H terminal of row 1 through crosspoints 1 1 through 1 12 Rows Columns 5 3 3 Matrix card connections The following information summarizes methods that can be used to connect test instrumen...

Page 66: ...om high H to low L differential and from high H and low L to chassis common mode for each pathway In general these tests are performed by simply measuring the leakage current with an electrometer In t...

Page 67: ...H L H L H L H L H L H L H L H L H L Chassis ground is accessible at rear panel of the 7001 Figure 5 3 Differential offset current testing 1 2 3 4 1 3 4 5 6 7 8 9 10 2 Model 7012 MODEL 617 Measure Cur...

Page 68: ...3 4 5 6 7 8 9 10 2 Model 7012 HI LO Note Setup shown is configured to test Row 1 crosspoints for contact potential Model 1484 Low Thermal Cable Unterminated Low Thermal short clean high purity copper...

Page 69: ...correct enabled for the entire procedure 6 On the Model 617 select the 20pA range and re lease zero check 7 On the Model 617 press suppress to cancel offset current and then enable zero check 8 On the...

Page 70: ...w 3 Col 7 to Row 4 Col 8 Row 3 and Row 4 1 3 7 and 1 4 8 8 Row 3 Col 8 to Row 4 Col 9 Row 3 and Row 4 1 3 8 and 1 4 9 9 Row 3 Col 9 to Row 4 Col 10 Row 3 and Row 4 1 3 9 and 1 4 10 Figure 5 5 Path iso...

Page 71: ...On the Model 617 set the voltage source for 100V and select the 200nA current range Make sure the voltage source is still in standby 6 Place the Model 617 in the V I measurement func tion by pressing...

Page 72: ...L H L H L H L H L H L H L H L H L Figure 5 7 Common mode isolation testing 1 2 3 4 1 3 4 5 6 7 8 9 10 2 Model 7012 HI Model 617 INPUT Model 7025 Unterminated Triax Cable Red Banana to Banana Cable Gro...

Page 73: ...are static sensitive it is recommended that they all be treated as static sensitive 1 Such devices should be transported and handled only in containers specially designed to prevent or dissipate stat...

Page 74: ...agram of the Model 7012 Key elements include the relay drivers and relays as well as the ROM which contains card ID and con guration information These various elements are discussed in the following p...

Page 75: ...more data The ROM will then sequentially transmit data after each acknowledge signal it receives 4 Once all data is received the mainframe sends a stop command which is a low to high transition of th...

Page 76: ...r ROM IDDATA Data output from mainframe or ROM IDDATA A power on safeguard circuit made up of U114 a D type ip op and associated components ensures that relays do not randomly energize on power up and...

Page 77: ...001 mainframe Some of the procedures may expose you to hazardous voltages Observe stan dard safety precautions for dealing with live circuits Failure to do so could result in personal injury or death...

Page 78: ...7 U105 pin 6 ID DATA pulses During power up only 8 U100 pin 7 STROBE pulse End of relay update sequence 9 U100 pin 2 CLK pulses During relay update sequence only 10 U100 pin 3 DATA pulses During relay...

Page 79: ...esenta tive or the factory see inside front cover for addresses When ordering parts be sure to include the following information 1 Card model number 7012 S or 7012 C 2 Card serial number 3 Part descri...

Page 80: ...el 7011 and 7012 use the same relay card only the connector cards are different Table 2 Parts List Screw Terminated Connector Card for 7012 S 7012 160 Component Layout Screw Terminated Con nector Card...

Page 81: ...CERAMIC C 365 1 C 365 1 C 237 1 C 22 001 C 314 10 C 64 150P J1002 1003 CONNECTOR MALE CS 736 2 K100 139 RELAY ULTRA SMALL POLARIZED TF2E 5V RL 149 P2001 CONNECTOR RIGHT ANGLE MALE CS 775 1 Q100 Q101 T...

Page 82: ...ARD ASS Y ORIENT ARROW TOWARDS PIN 1 OF DEVICE E2 25917 CHG D U105 FROM IC 737 TO TC17 100 DELETED SO 72 KK 6 18 01 Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scie...

Page 83: ...2 25917...

Page 84: ...TC17 100 25917 2...

Page 85: ...1002 1003 SHIELD STRIP POLYURETHANE FOR BOTTOM CLAMP TOP CLAMP 2 56X7 16 PHILLIPS PAN HEAD FOR TERMINAL SHIELD BOARD 7011 304 2 FA 243 1 7011 309 7011 305 2001 345 1 7011 302 2 56X7 16PPH J1004 1006 J...

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Page 88: ...365 1 CR101 104 DIODE SILICON IN4148 DO 35 RF 28 E101 102 BEAD FERRITE CT 9 J1004 CONN 96 PIN 3 ROWS CS 514 K101 104 RELAY ULTRA SMALL POLARIZED TF2E 4 5V RL 162 P1002 1003 CONNECTOR FEMALE CS 748 3 Q...

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Page 91: ...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 92: ...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 93: ...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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