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Multiplexing Basics

2-6

Figure 2-6 shows how each bank of the Model 7015 is con-
nected to the backplane. Notice that since the Model 7015 is
a two-pole card, there is no connection made to the Guard
terminal of the backplane. The Model 7015 is shipped from
the factory with the backplane jumpers installed.

Removing (cutting) the backplane jumpers isolates the card
from the backplane, and subsequently, any card installed in
an other slot. For information on removing the jumpers, refer
to Section 3.

NOTE

The Model 7001/7002 does not provide an
analog backplane for the non-701X series
cards. As a result, any of these cards in-
stalled in one slot in the mainframe is elec-
trically isolated from any card(s) installed
in an other slot. The only way to connect a
Model 7015 to one of these cards is to wire
them together using the connector blocks
or terminals.

Figure 2-6

Bank connections to backplane

7001/7002

Analog

Backplane

H

L

G

H

L

7015
Bank

(1 of 4)

Backplane
Jumpers

H = High
L = Low
G = Guard

2.3

Typical multiplexer switching schemes

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 help minimize noise pickup in
sensitive measurement applications. These shields are shown
connected to chassis ground. For some test configurations,
shielding may prove to be more effective with shields con-
nected to circuit common or LO. Chassis ground is accessi-
ble at the rear panel of the Model 7001/7002.

2.3.1 Single-ended switching

In the single-ended switching configuration, the source or
measure instrument is connected to the DUT through a sin-
gle pathway, as shown in Figure 2-7. The instrument is con-
nected to the output of one of the banks, and the DUT is
shown connected to one of the inputs for that bank.

2.3.2 Differential switching

The differential or floating switching configuration is shown
in Figure 2-8. The advantage of using this configuration is
that the terminals of the source or measure instrument are not
confined to the same pathway. Each terminal of the instru-
ment can be switched to any available input in the test sys-
tem.

2.3.3 Sensing

Figure 2-9 shows how the multiplexer card can be configured
to use instruments that have sensing capability. The main ad-
vantage of using sensing is to cancel the effects of switch
card path resistance (<210

Ω

, <130

Ω

typical) and the resis-

tance of external cabling. Whenever path resistance is a con-
sideration, sensing should be used.

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Summary of Contents for 7015-S

Page 1: ...l service in house repair center WE BUY USED EQUIPMENT Sell your excess underutilized and idle used equipment We also offer credit for buy backs and trade ins www artisantg com WeBuyEquipment REMOTE INSPECTION Remotely inspect equipment before purchasing with our interactive website at www instraview com LOOKING FOR MORE INFORMATION Visit us on the web at www artisantg com for more information on ...

Page 2: ...ntains Operating and Servicing Information Models 7015 S and 7015 C 40 Channel Solid State Multiplexer Cards 7015 901 01 Rev A 6 93 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 3: ...LE 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 INSTRU MENTS AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS INC HAS BEEN ADVISED IN ADVANCE OF THE POS SIBILITY OF SUCH DAMAGES SUCH EXCLUDED DAMAGES SHALL INCLUDE BUT ARE NOT LIMITED TO COSTS OF REMOVAL AND...

Page 4: ...tion Manual 1993 Keithley Instruments Inc All Rights Reserved Cleveland Ohio U S A First Printing June 1993 Document Number 7015 901 01 Rev A Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 5: ...re 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 Revi sion includes a revised copy of this print history page Revision A Document Number 7015 901 01 June 1993 All Keithley product names are trademarks or registered trademarks of Keithley Instruments Inc Other brand a...

Page 6: ... hazardous voltage is present in any unknown circuit before measuring Users of this product must be protected from electric shock at all times The responsible body must ensure that users are prevented access and or insulated from every connection point In some cases connections must be exposed to potential human contact Product users in these circumstances must be trained to protect themselves fro...

Page 7: ...he CAUTION heading in a manual explains hazards that could damage the instrument Such damage may invalidate the warranty Instrumentation and accessories shall not be connected to humans Before performing any maintenance disconnect the line cord and all test cables To maintain protection from electric shock and fire replacement components in mains circuits including the power transformer test leads...

Page 8: ... CONTACT TYPE Solid state switch CHANNEL RESISTANCE per conductor 210Ω CONTACT POTENTIAL 7015 C 5µV per channel contact pair 7015 S 4µV per channel contact pair OFFSET CURRENT 1nA ACTUATION TIME 500µs ISOLATION Bank 109Ω 25 pF Channel to Channel 109Ω 50 pF Differential Configured as 1 10 109Ω 100pF Configured as 1 40 109Ω 200pF Common Mode Configured as 1 10 109Ω 375pF Configured as 1 40 109Ω 1100...

Page 9: ...hipment 1 3 1 8 Optional accessories 1 3 2 Mutliplexing Basics 2 1 Introduction 2 1 2 2 Basic multiplexer configurations 2 1 2 2 1 Multiplexer bank to bank jumpers 2 2 2 2 2 Backplane jumpers 2 5 2 3 Typical multiplexer switching schemes 2 6 2 3 1 Single ended switching 2 6 2 3 2 Differential switching 2 6 2 3 3 Sensing 2 6 2 4 Multiplexer expansion 2 8 2 4 1 Multi card switching systems 2 8 2 4 2...

Page 10: ... Resistor testing 4 7 4 4 4 Testing with matrix cards 4 10 4 4 3 Transistor current gain testing 4 10 4 5 Measurement considerations 4 12 4 5 1 Thermoelectric potentials 4 12 4 5 2 Channel resistance 4 13 4 5 3 Path isolation 4 14 4 5 4 Magnetic fields 4 15 4 5 5 Radio frequency interference 4 15 4 5 6 Ground loops 4 15 4 5 7 Keeping connectors clean 4 16 4 5 8 Scanning speed considerations 4 16 5...

Page 11: ...15 5 6 Troubleshooting 5 16 5 6 1 Troubleshooting equipment 5 16 5 6 2 Troubleshooting access 5 16 5 6 3 Troubleshooting Procedure 5 16 6 Replaceable Parts 6 1 Introduction 6 1 6 2 Parts lists 6 1 6 3 Ordering information 6 1 6 4 Factory service 6 1 6 5 Component layouts and schematic diagrams 6 1 iii Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 12: ...umper installation 3 3 Figure 3 4 Backplane jumpers 3 4 Figure 3 5 Model 7015 screw terminal connector card 3 4 Figure 3 6 Typical screw terminal connections 3 5 Figure 3 7 Cable clamp for screw terminal connector card 3 5 Figure 3 8 Typical round cable connection techniques 3 8 Figure 3 9 Model 7011 MTR connector pinout 3 9 Figure 3 10 Model 7011 KIT R with cable assembly 3 9 Figure 3 11 Single c...

Page 13: ...tion by path isolation resistance 4 14 Figure 4 13 Power line ground loops 4 15 Figure 4 14 Eliminating ground loops 4 16 5 Service Information Figure 5 1 Path resistance test connections 5 4 Figure 5 2 Differential and common mode offset current test connections 5 5 Figure 5 3 Contact potential test connections 5 6 Figure 5 4 Bank isolation test connections 5 7 Figure 5 5 Channel to channel isola...

Page 14: ...le 4 7 Paired Channels in 4 pole Operation 4 7 5 Service Information Table 5 2 Verification equipment 5 2 Table 5 8 Bank isolation test summary 5 8 Table 5 9 Channel to channel isolation test summary 5 9 Table 5 12 Differential and common mode isolation testing 5 12 Table 5 16 Recommended troubleshooting equipment 5 16 Table 5 17 Troubleshooting procedure 5 17 vii Artisan Technology Group Quality ...

Page 15: ...8 The rest of Section 1 is arranged in the following manner 1 2 Features 1 3 Warranty information 1 4 Manual addenda 1 5 Safety symbols and terms 1 6 Specifications 1 7 Unpacking and inspection 1 8 Repacking for shipment 1 9 Optional accessories 1 2 Features The Model 7015 is a solid state two pole quad 1 10 mul tiplexer card Some of the key features include Solid state relays for fast switching i...

Page 16: ... front of this man ual These specifications are exclusive of the multiplexer mainframe specifications 1 7 Unpacking and inspection 1 7 1 Inspection for damage The Model 7015 is packaged in a re sealable anti static bag to protect it from damage due to static discharge and from contamination that could degrade its performance Before re moving the card from the bag observe the following precau tions...

Page 17: ...the wiring con figuration of the first connector card Model 7011 KIT R This connection kit includes a 96 pin female DIN connector that will mate directly to the connec tor on the Model 7015 C or to a standard 96 pin male DIN bulkhead connector see Model 7011 MTR This connector uses solder cups for connections to external circuitry It in cludes an adapter for a round cable and the housing Model 701...

Page 18: ...ng differential floating switching and sensing 2 4 System expansion Discusses the various configura tions that are possible by using multiple cards 2 2 Basic multiplexer configurations A simplified schematic of the Model 7015 multiplexer card is shown in Figure 2 1 It is organized as four 1 10 multi plexer banks Each bank has 10 inputs and one output Two pole switching is provided for each multipl...

Page 19: ...k A 7015 1 10 1 10 1 10 HI LO Input 1 of 40 HI LO Bank HI LO Jumpers HI LO C D HI LO HI LO Bank to Bank Jumpers Backplane Jumpers to 7001 7002 Analog Backplane Note Factory Configuration shown Four 1 10 multiplexers no jumpers installed Figure 2 2 Two 1 20 multiplexers Bank A jumpered to Bank B Bank C jumpered to Bank D Figure 2 3 One 1 40 multiplexer all bank to bank jumpers in stalled Figure 2 4...

Page 20: ...k B 2 1 10 2 2 Bank C 2 1 10 2 2 Bank D 2 Output B Output C Output D Figure 2 3 Two 1 20 multiplexer configuration jumpers installed Output A 1 10 2 2 Bank A Inputs 2 1 10 2 2 Bank B 2 1 10 2 2 Bank C 2 1 10 2 2 Bank D 2 2 2 Jumpers Jumpers Output C Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 21: ...iplexer configuration jumpers installed Output A 1 10 2 2 Bank A Inputs 2 1 10 2 2 Bank B 2 1 10 2 2 Bank C 2 1 10 2 2 Bank D 2 2 2 2 Jumpers Jumpers Jumpers Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 22: ...rd 1 Card 2 Model 7001 7002 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 7015 2 2 2 Backplane jumpers There are four pairs of backplane jumpers located on the re lay card With the jumpers installed the banks of the multi plexer card are connected to the analog backplane of the...

Page 23: ... configurations to help minimize noise pickup in sensitive measurement applications These shields are shown connected to chassis ground For some test configurations shielding may prove to be more effective with shields con nected to circuit common or LO Chassis ground is accessi ble at the rear panel of the Model 7001 7002 2 3 1 Single ended switching In the single ended switching configuration th...

Page 24: ...ential switching example HI LO Source or Measure 7015 H L H L DUT Bank A B Input 1 10 Out In Bank C D Input 1 10 Out In Figure 2 9 Sensing example Source HI Sense HI Sense LO Source LO Source or Measure 7015 H L H L DUT Bank A B Out In Input 1 10 Bank C D Input 1 10 Out In Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 25: ...o the banks of the multiplexer card installed in slot 2 CARD 2 through the analog backplane and with any remaining cards installed in a Model 7002 Figure 2 11 shows an example of input expansion Each Model 7015 card is configured as four 1 10 multiplexers By connecting the banks together via Model 7001 7002 an alog backplane the resulting multiplexer system has 20 2 pole inputs for each of the fou...

Page 26: ...1 10 1 10 7001 7002 Analog Backplane Card 1 Quad 1x10 Multiplexers 7015 1 10 1 10 1 10 1 10 Card 2 Backplane Jumpers installed Quad 1x10 Multiplexers Quad 1x20 Multiplexer multiplexer banks On the multiplexer card the bank to bank jumpers must be removed to maintain isolation be tween matrix rows See the instruction manual for the Model 7012 for complete information on the matrix card 2 4 2 Mainfr...

Page 27: ...e Card 1 4 x 10 Matrix Notes 1 Models 7015 and 7012 backplane jumpers must be installed 2 Model 7015 bank to bank jumpers must be removed 1 10 7015 Card 2 Quad 1 x 10 Mux 1 10 1 10 1 10 Bank A Bank B Bank C Bank D Inputs Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 28: ... or Model 7002 mainframe 3 2 Handling precautions To maintain high impedance isolation care should be taken when handling the relay card to avoid contamination from such foreign materials as body oils Such contamination can substantially lower leakage resistances thus degrading per formance To avoid possible contamination always grasp the relay and connector cards by the side edges or shields Do n...

Page 29: ...used to connect the LO terminals of the banks to gether The bottom terminal pairs W100 W102 and W104 are used to connect the HI terminals of the banks together Table 3 1 summarizes the purpose of each jumper Figure 3 1 Bank to bank jumper locations A Screw Terminal Connector Card Model 7015 S B Multi pin Connector Card Model 7015 C Bank to Bank Jumper Terminals Bank to Bank Jumper Terminals Table ...

Page 30: ...rate the relay card from the con nector card by removing the mounting screw and pulling the two cards away from each other Remember to han dle the cards only by the edges and shields to avoid con tamination 2 Use Figure 3 4 and Table 3 2 to locate the jumpers that are to be removed 3 It is not necessary to unsolder the jumpers from the PC board Using a pair of wire cutters cut both ends of each ju...

Page 31: ...ly to the screw terminals of the twelve terminal blocks Each screw terminal will accommo date 16 22 AWG wire Figure 3 4 Backplane jumpers W100 7015 Relay Card W101 W102 W103 W104 W105 W106 W107 Backplane Jumpers Figure 3 5 Model 7015 screw terminal connector card Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 32: ...lamp screw enough to disengage it from the bottom half of the cable clamp B Using your thumb and forefinger press the retaining 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 the bottom half of the cable clamp 6 Replace the top half of the clamp It simply snaps onto the bottom half of the clamp Tighten ...

Page 33: ...2 HI LO 24a 23c 24 87 Input 2 HI LO 16a 15c 16 79 Input 2 HI LO 8a 7c 8 71 Input 3 HI LO 31b 31a 63 31 Input 3 HI LO 23b 23a 55 23 Input 3 HI LO 15b 15a 47 15 Input 3 HI LO 7b 7a 39 7 Input 4 HI LO 30c 30b 94 62 Input 4 HI LO 22c 22b 86 54 Input 4 HI LO 14c 14b 78 46 Input 4 HI LO 6c 6b 70 38 Input 5 HI LO 30a 29c 30 93 Input 5 HI LO 22a 21c 22 85 Input 5 HI LO 14a 13c 14 77 Input 5 HI LO 6a 5c 6 ...

Page 34: ...se Round cable assemblies Figure 3 8 shows typical round cable connection techniques using accessories available from Keithley In Figure 3 8A connections are accomplished using a Model 7011 MTC 2 cable and a Model 7011 MTR bulkhead con nector The two meter round cable is terminated with a 96 pin female DIN connector at each end This cable mates di rectly to the multi pin connector card and to the ...

Page 35: ...d Wire instrumentation and DUT to bulkhead connector See Figure 3 9 and Table 3 3 for terminal identification B 7011 MTC 2 Cut in Half Wire directly to instrumentation and DUT Multi Pin Connector Card C Cable Wire directly to instrumentation and DUT 7011 Kit R Connector Kit Cable Hitachi p n N2807 P D 50TAB is a 50 conductor round cable Two of these cables can be used to supply 100 conductors Arti...

Page 36: ... side 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 Table 3 3 for terminal identification Figure 3 10 Model 7011 KIT R with cable assembly Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 37: ...iplexer using the Model 7011 MTC 2 round cable assembly This cable mates direct ly to both the external bulkhead connector and the Model 7015 C multiplexer card assembly Note that the bulkhead connector is shown mounted to a fixture to help keep the ca bling stable during the test The single card system in Figure 3 12 is identical to the sys tem in the previous illustration except for the connecti...

Page 38: ...khead Connector 7011 MTR Bulkhead Connector 7011 MTC 2 Cable Assembly 84 Individual Conductors DUT Test Fixture 1 20 1 20 Instruments DUTs 1 20 1 20 1 20 1 20 Simplified Equivalent Circuit Dual 1x20 Notes Bank to Bank jumpers installed as follows Bank A connected to Bank B Bank C connected to Bank D 7015 C Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 39: ...rument HI and LO to Banks A and B HI and LO to Banks C and D 1 20 Instruments DUTs 1 20 1 20 1 20 1 20 Simplified Equivalent Circuit Dual 1x20 Notes Bank to bank jumpers installed as follows Bank A connected to Bank B Bank C connected to Bank D 7015 S Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 40: ...led in two Model 7001 mainframes to configure a single 1 120 multiplexer system Each card is configured as a single 1 40 multiplexer Bank to bank jumpers of all three cards must be installed to connect Banks A B C and D together By leaving the backplane jumpers of the cards in mainframe 1 installed the banks of Card 1 are connected to the banks of Card 2 through the analog backplane of the Model 7...

Page 41: ...1 MTC 2 Cable Assembly Cut in half to provide two cables Instruments DUTs 1 40 1 40 41 80 41 80 Simplified Equivalent Circuit Card 2 1x40 7001 Analog Backplane Card 1 1x40 Single 1x80 Multiplexer Notes 1 All bank to bank jumpers both cards must be installed 2 Backplane jumpers both cards must be installed 40 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg co...

Page 42: ...truments DUTs 1 40 1 40 41 80 41 80 Simplified Equivalent Circuit Card 2 1x40 7001 Analog Backplane Card 1 1x40 Single 1x80 Multiplexer Notes 1 All bank to bank jumpers both cards must be installed 2 Backplane jumpers both cards must be installed 7001 C A R D 1 C A R D 2 7015 S 7015 S Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 43: ...Connector Kit Cable Instruments DUTs 1 40 1 40 41 80 41 80 Simplified Equivalent Circuit Card 2 1x40 7001 Analog Backplane Card 1 1x40 Single 1x120 Multiplexer Notes 1 Backplane jumpers for both cards installed in 7001 1 must be installed 2 All bank to bank jumpers on all three cards must be installed Card 1 1x40 7001 1 7001 2 External Bank Connections C A R D 1 C A R D 2 7015 C I N O U T Trigger ...

Page 44: ...r both cards installed in 7001 1 must be installed 2 All bank to bank jumpers on all three cards must be installed DUT Test Fixture 81 120 Card 1 1x40 7001 1 7001 2 External Bank Connections 244 Individual Conductors 22 AWG C A R D 1 C A R D 2 7015 S Not Used 7001 1 C A R D 1 C A R D 2 7015 S 7015 S I N O U T Trigger Link 81 120 Figure 3 16 Two mainframe system example screw terminal connector car...

Page 45: ...ischarged 1 Mate the connector card to the relay card if they are sep arated Install the supplied 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 slot that you wish to install the card in 3 Referring to Figure 3 17 or Figure 3 18 for Model 7015 C installation...

Page 46: ...488 CHANNEL READY EXTERNAL TRIGGER O U T I N C A R D 90 250V 50 400Hz 40VA MAX LINE RATING 2 TRIGGER LINK DIGITAL I O C A R D 1 MADE IN USA Ejector Arms Open Position Tighten Ground Screw Ejector Arms Locked Position Tighten ground screw Ejector Arms locked position CARD 1 CARD 2 CARD 3 CARD 4 INTERCONNECTION INSTALLATION AND REMOVAL OF CARDS BY QUALIFIED SERVICE PERSONNEL ONLY WARNING NO INTERNAL...

Page 47: ...exceed the following maximum signal levels 175V peak between any two pins 34mA resistive load 0 3VA max 1 106V Hz max 4 3 Mainframe control of multiplexer card The following information pertains to the Model 7015 Solid State Multiplexer Card It assumes that you are familiar with operation of the Model 7001 or Model 7002 mainframe If you are not familiar with operation of the mainframe it is recomm...

Page 48: ... by exclamation points Some examples of CHANNEL assignments are as follows CHANNEL 1 1 Slot 1 Channel 1 Input 1 of Bank A CHANNEL 1 40 Slot 1 Channel 40 Input 10 of Bank D CHANNEL 2 23 Slot 2 Channel 23 Input 3 of Bank C CHANNEL 2 36 Slot 2 Channel 36 Input 6 of Bank D Figure 4 1 Channel status display CARD 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 Model 7001 D...

Page 49: ... 2 3 2 13 2 23 2 33 2 4 2 14 2 24 2 34 2 5 2 15 2 25 2 35 2 6 2 16 2 26 2 36 2 7 2 17 2 27 2 37 2 8 2 18 2 28 2 38 2 9 2 19 2 29 2 39 2 10 2 20 2 30 2 40 Examples 1 18 Slot 1 Channel 18 Input 8 Bank B 2 36 Slot 2 Channel 36 Input 6 Bank D Note For Model 7002 slots 3 10 substitute slot number for first number in channel assignments Notice that channel entries are separated by commas A comma is inse...

Page 50: ...se commands are listed as follows RST TRIGger SEQuence COUNt AUTo ON ROUTe SCAN list INIT The first command resets the mainframe to a default scan configuration The second command automatically sets the channel count to the number of channels in the Scan List the third command defines the Scan List and the fourth com mand takes the mainframe out of the idle state The following program will perform...

Page 51: ...al 2 pole connection scheme shown a total of 40 DUTs per card can be tested at high scanning rates with break before make off Model 7002 only The type of measurement can vary although some sort of voltage measurements are usually made using the setup shown To provide synchronization between scanner card channel closure and multimeter measurements a trigger link cable is connected between the multi...

Page 52: ...4VAC 180 250VAC 50 60 400HZ 55VA MAX LINE FUSE SLOWBLOW 1 2A 250V IEEE 488 CHANGE IEEE ADDRESS WITH FRONT PANEL MENU OPTION SLOT 7001 Switch System 2001 Multimeter Trigger Link Cable 8501 Trigger Link OUT Trigger Link IN NEXT DISPLA Y PREV POWER DCV ACV DCI ACI Ω2 Ω4 FREQ TEMP REL TRIG STORE RECALL INFO LOCAL CHAN SCAN CONFIG MENU EXIT ENTER RANGE AUTO FILTER MATH RANGE SENSE Ω 4 WIRE HI INPUT LO ...

Page 53: ...t the Model 2001 is limited to the 200Ω range and above because the sense lead resistance is too high for the 20Ω range The Model 7015 can be configured for 20 channels of 4 pole operation by isolating Banks A and B from Banks C and D and by programming the Model 7001 7002 mainframe for the 4 pole mode See Section 4 of the Model 7001 7002 In struction Manual Bank jumper removal is described in par...

Page 54: ...L 500V PEAK F R FRONT REAR 2A 250V AMPS 350V PEAK 1100V PEAK Model 2001 Multimeter 2001 MULTIMETER 1 Dual 1x20 MUX DUTs 20 R A Test Configuration B Simplified Equivalent Circuit 20 21 40 1 20 Input HI Sense Ω HI Sense Ω LO Input HI Sense Ω HI Input LO Sense Ω LO 2001 Multimeter 7015 DUT 7015 Ω Note Jumpers between Banks B and C are removed Input LO Artisan Technology Group Quality Instrumentation ...

Page 55: ...I LO HI LO 220 Current Source 182 Input 220 Output R 220 Currrent Source 7015 DUT V 182 Nanovoltmeter 7015 Low level resistance measurements Many times it is necessary to make resistance measurements with either lower voltage sensitivity or higher currents than are available with ordinary DMMs Examples of cases where low level resistance measurements may be necessary include the testing of PC boar...

Page 56: ...ample a 1mA collector current will result in a nominal 0 1 to 0 2V voltage drop across the relay contacts 4 4 4 Testing with matrix cards The Model 7015 can be added to a matrix switching system to enhance the test capabilities of that system The following paragraphs discuss an overall multiplexer matrix switching system Multiplexer and matrix card connections Figure 4 8 shows a typical system usi...

Page 57: ...e 2001 Multimeter 230 Voltage Source A Test Configuration B Simplified Equivalent Circuit Amps Output Common 7015 I B NEXT DISPLAY PREV POWER DCV ACV DCI ACI Ω2 Ω4 FREQ TEMP REL TRIG STORE RECALL INFO LOCAL CHAN SCAN CONFIG MENU EXIT ENTER RANGE AUTO FILTER MATH RANGE SENSE Ω 4 WIRE HI INPUT LO INPUTS CAL 500V PEAK F R FRONT REAR 2A 250V AMPS 350V PEAK 1100V PEAK 2001 MULTIMETER Artisan Technology...

Page 58: ...ts that can seriously affect low level measure ment accuracy The following paragraphs discuss these ef fects and ways to minimize them 4 5 1 Thermoelectric potentials Thermoelectric potentials thermal EMFs are small electric potentials generated by differences in temperature at circuit connecting points such as multiplexer card terminals and connectors Thermal EMFs can also be generated by the sol...

Page 59: ...thermal drifts and the rel process should be repeated whenever the range is changed for best accuracy 4 5 2 Channel resistance Channel resistance is the equivalent resistance between the input and output terminals of the multiplexer card With con ventional mechanical relays the channel resistance is gener ally low enough to be negligible However the solid state relays used in the Model 7015 have a...

Page 60: ...dance devices The voltage measured across such a device for example can be substantially attenuated by the voltage divider action of the device source resistance and path isolation resistance as shown in Figure 4 12 Also leakage currents can be generated through these resistances by voltage sources in the system Any differential isolation capacitance affects DC measure ment settling time as well a...

Page 61: ...e sources such as radio or TV signals or some types of electronic equipment micro processors high speed digital circuits etc or it can result from impulse sources as in the case of arcing in high voltage environments In either case the effect on the measurement can be considerable if enough of the unwanted signal is present RFI can be minimized in several ways The most obvious method is to keep th...

Page 62: ...s to avoid contamination If the connector insulators should become contaminated ei ther by inadvertent touching or from air borne deposits they can be cleaned with a cotton swab dipped in clean methanol After thorough cleaning they should be allowed to dry for several hours in a low humidity environment before use or they can be dried more quickly using dry nitrogen 4 5 8 Scanning speed considerat...

Page 63: ...the high impedance areas on the Model 7015 care should be taken when handling or servicing the card to prevent possible contamination The following precautions should be taken when servicing the card Handle the card only by the edges and shields Do not touch any board surfaces or components not associated with the re pair Do not touch areas adjacent to electrical contacts When servicing the card w...

Page 64: ...st may indicate that the multiplexer card is contaminated See paragraph 5 2 for in formation on cleaning the card 5 3 1 Environmental conditions All verification measurements should be made at an ambient temperature between 18 and 28 C and at a relative humid ity of less than 70 5 3 2 Recommended equipment Table 5 1 summarizes the equipment necessary for perfor mance verification along with an app...

Page 65: ... Turn off the Model 7001 7002 if it is on 2 Turn on the Model 2001 and allow it to warm up for one hour before making measurements 3 Connect all input terminals of Bank A together to form one common terminal as shown in Figure 5 1 4 Set the Model 2001 to the 2kΩ range and connect the four test leads to the INPUT and SENSE jacks 5 Short the four test leads together and enable REL Leave REL enabled ...

Page 66: ...HI INPUT LO INPUTS CAL 500V PEAK F R FRONT REAR 2A 250V AMPS 350V PEAK 1100V PEAK 2001 MULTIMETER Model 2001 Multimeter Measure 4 Wire Ohms A B C D 1 3 4 5 6 7 8 9 10 2 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 Note Connections are set up to test Bank A HI Jumpers Bank Outputs Bank Inputs Model 7015 Sense Ω HI Input HI Input LO Sense Ω LO 6 Turn on the Model 7001 7002 and program the...

Page 67: ...A pathways for offset current Model 7025 Unterminated Triax Cable LO Black A Differential A B C D 1 3 4 5 6 7 8 9 10 2 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 Bank Outputs Model 7015 Model 617 Measure Current INPUT HI Red Note Setup shown is configured to test Bank A pathways for offset current Model 7025 Unterminated Triax Cable LO Blk B Common Mode Short Bank Inputs Bank Inputs A...

Page 68: ...DING on the Model 182 to null out in ternal offsets Leave REL READING enabled for the entire procedure 11 Turn off the Model 7001 7002 Remove the Model 7015 from slot 1 Cut the short on B and D output HI to LO 12 Install the Model 7015 in the Model 7001 7002 slot 1 and turn power on 13 Wait 15 minutes 14 Program the Model 7001 7002 to close Channel 1 1 15 After settling verify that reading on the ...

Page 69: ...nfigured to test isolation between Bank A and Bank B Model 7015 5 3 7 Bank and channel to channel isolation tests Bank isolation tests check the leakage resistance between ad jacent banks Channel to channel isolation tests check the leakage resistance between a Bank Output connection and a Bank Input connection with an adjacent Bank Input relay closed In general the tests are performed by applying...

Page 70: ...the card as shown in Figure 5 5 25 Install the Model 7015 in slot 1 of the Model 7001 7002 and turn on the mainframe 26 Program the Model 7001 7002 to close Channel 1 2 Bank A Input 2 Make sure all other channels are open 27 On the Model 617 disable zero check and press OPER ATE to source 100V 28 After allowing the reading on the Model 617 to settle verify that it is 1GΩ 109 Ω 29 Place the Model 6...

Page 71: ...A and Input 4 Bank A and Input 5 Bank A and Input 6 Bank A and Input 7 Bank A and Input 8 Bank A and Input 9 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 Assumes Model 7015 installed in slot 1 of mainframe Programmed as slot 1 and channel Figure 5 5 Channel to channel isolation test connections A B C D 1 3 4 5 6 7 8 9 10 2 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 Bank Outputs Bank Inputs Mo...

Page 72: ...Input 10 Bank C and Input 1 Bank C and Input 2 Bank C and Input 3 Bank C and Input 4 Bank C and Input 5 Bank C and Input 6 Bank C and Input 7 Bank C and Input 8 Bank C and Input 9 1 22 1 23 1 24 1 25 1 26 1 27 1 28 1 29 1 30 28 29 30 31 32 33 34 35 36 Bank D Input 1 to Bank D Input 2 Bank D Input 2 to Bank D Input 3 Bank D Input 3 to Bank D Input 4 Bank D Input 4 to Bank D Input 5 Bank D Input 5 t...

Page 73: ...UT Model 7025 Unterminated Triax Cable Red Banana to Banana Cable Ground Link Removed Unterminated Banana Cable Note Setup shown is configured to test isolation between HI and LO of Bank A 5 3 8 Differential and common mode isolation tests These tests check the leakage resistance isolation between HI H and LO L differential and from HI H and LO L to chassis common mode of every bank and channel In...

Page 74: ...8 9 10 11 Bank A Bank A Input 1 Bank A Input 2 Bank A Input 3 Bank A Input 4 Bank A Input 5 Bank A Input 6 Bank A Input 7 Bank A Input 8 Bank A Input 9 Bank A Input 10 None 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 12 13 14 15 16 17 18 19 20 21 22 Bank B Bank B Input 1 Bank B Input 2 Bank B Input 3 Bank B Input 4 Bank B Input 5 Bank B Input 6 Bank B Input 7 Bank B Input 8 Bank B Input 9 Bank B Inpu...

Page 75: ...nd Link Removed Unterminated Banana Cable Source V and Measure V I A B C D 1 3 4 5 6 7 8 9 10 2 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 Bank Inputs Model 7015 Jumper Note Setup shown is configured to test isolation between Bank A and chassis ground 3 Handle the devices only by the body do not touch the pins or terminals 4 Any printed circuit board into which the device is to be ins...

Page 76: ...wer up card identification information from each card is read by the mainframe This ID data includes such in formation as card ID hardware settling time and relay con figuration information ID data is contained within an on card EEPROM U104 In order to read this information the sequence described below is performed on power up 1 The IDDATA line pin 6 of U104 is set from high to low while the IDCLK...

Page 77: ...ormation into the Q out puts of the relay drivers and the appropriate relays are ener Figure 5 9 Start and stop sequences IDCLK IDDATA Start Bit Stop Bit Figure 5 10 Transmit and acknowledge sequence IDCLK Acknowledge Start 1 8 9 Data output from mainframe or ROM IDDATA Data output from mainframe or ROM IDDATA gized Note that a relay driver output goes low to energize the corresponding relay 5 5 4...

Page 78: ...ithley 7001 Control card WARNING Lethal voltages are present within the 7001 mainframe Some of the proce dures may expose you to hazardous voltages Observe standard safety pre cautions for dealing with live circuits Failure to do so could result in personal injury or death CAUTION Observe the following precautions when troubleshooting or repairing the switch card To avoid contamination which could...

Page 79: ... voltage 4 U104 pin 5 IDCLK pulses During power up only 5 U104 pin 6 IDDATA pulses During power up only 6 U100 pin 7 STROBE pulse End of relay update sequence 7 U100 pin 2 CLK pulses During relay update sequence only 8 U100 pin 3 DATA pulses During relay update sequence only 9 U100 U103 U105 pins 10 18 Low with relay energized high with relay de energized Relay driver outputs Artisan Technology Gr...

Page 80: ...Service Information 5 18 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 81: ...cuit description if applicable 5 Keithley part number 6 4 Factory service If the card is to be returned to Keithley Instruments for repair perform the following 1 Complete the service form at the back of this manual and include it with the card 2 Carefully pack the card in the original packing carton 3 WriteATTENTION REPAIR DEPT on the shipping label Note It is not necessary to return the switchin...

Page 82: ...ard for 7015 S 7015 166 Schematic Terminal Block Board for 7015 S 7015 170 Component Layout Mass Terminated Card for 7015 C 7015 176 Schematic Mass Terminated Card for 7015 C Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 83: ...ANCE CAP 10UF 20 100 25V ALUM ELEC CAP 1UF 20 50V CERAMIC CAP 150PF 10 1000V CERAMIC DIODE SILICON IN4006 D0 41 CONN 48 PIN 3 ROWS CONNECTOR 32 PIN 2 ROWS RES 10K 5 1 4W COMPOSITION OR FILM RES 2K 5 1 4 COMPOSITION OR FILM RELAY IC 8 BIT SERIAL IN LATCH DRIVER 5841A EPROM PROGRAM JUMPER 7011 301B 7011 305B ST 137 20 ST 204 1 C 314 10 C 365 1 C 64 150P RF 38 CS 736 2 CS 775 1 R 76 10K R 76 2K RL 16...

Page 84: ...sz KK Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 85: ...B2 25917 TC17 100 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 86: ...B2 25917 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 87: ...J1006 1009 1012 1015 J1004 1005 1007 1008 1010 1011 P1002 1003 W100 105 TOP CLAMP CABLE CLAMP SHIELD CONN 6 PIN CONN 8 PIN CONNECTOR 48 PIN 3 ROWS CONN BERG 2 PIN 7011 302B 7011 304 5C 7011 305B TE 115 6 TE 115 8 CS 748 3 CS 339 2 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 88: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 89: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 90: ...5V CONNECTOR 48 PIN 3 ROWS TRANS N CHAN MOSPOW FET 2N7000 TO 92 RES 1M 10 1 2W COMPOSITION RES 10 5 1 4W COMPOSITION OR FILM RES 100K 5 1 4W COMPOSITION OR FILM RES 10K 5 1 4W COMPOSITION OR FILM RES 68 5 1 4W COMPOSITION OR FILM RES 10K 1 1 8W METAL FILM RES 4 99K 1 1 8W METAL FILM IC QUAD 2 INPUT NOR 74HC02 IC DUAL VOLTAGE COMPARATOR LM393 CONN BERG 2 PIN 7011 307 7011 309A 7011 311A ST 203 1 C ...

Page 91: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 92: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 93: ...on for damage 1 2 Installation and removal 3 18 Instruction manual 1 2 J Jumper installation 3 3 Jumper removal 3 3 K Keeping connectors clean 4 16 L Low level resistance measurements 4 9 M Magnetic fields 4 15 Mainframe control of multiplexer card 4 1 Mainframe multiplexer expansion 2 9 Manual addenda 1 2 Maximum signal levels 4 1 Measurement considerations 4 12 Minimizing thermal EMFs 4 13 Mixin...

Page 94: ...hipment contents 1 2 Single card system 3 10 Single ended switching 2 6 Special handling of static sensitive devic es 5 13 Specifications 1 2 T Testing with matrix cards 4 10 Thermoelectric generation 4 12 Thermoelectric potentials 4 12 Transistor current gain testing 4 10 Troubleshooting 5 16 Troubleshooting access 5 16 Troubleshooting equipment 5 16 Troubleshooting Procedure 5 16 Two card system...

Page 95: ...Calibration only CertiÞcate of calibration required Data required attach any additional sheets as necessary Show a block diagram of your measurement system 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 Rela...

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

Page 97: ...l service in house repair center WE BUY USED EQUIPMENT Sell your excess underutilized and idle used equipment We also offer credit for buy backs and trade ins www artisantg com WeBuyEquipment REMOTE INSPECTION Remotely inspect equipment before purchasing with our interactive website at www instraview com LOOKING FOR MORE INFORMATION Visit us on the web at www artisantg com for more information on ...

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