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Operation

4-9

detrimental effect on measurement accuracy unless steps are
taken to avoid them. Thermal EMF effects can be virtually
eliminated by taking two voltage measurements, E

1

and E

2

,

the first with the current, I, flowing in one direction, and the
second with a current, I, of the same magnitude flowing in
the opposite direction. The resistance can then be calculated
as follows:

Note that simply reversing the current source polarity will re-
sult in a 2

×

accuracy specification change. To avoid this

problem, matrix switching could be added to the test system
to reverse the current. See paragraph 4.4.4.

R

E

2

E

–

1

2I

----------------

=

Figure 4-6

Low-resistance testing

KEITHLEY

182 SENSITIVE DIGITAL VOLTMETER

TRG

SRQ

REM

TALK

LSTN

Model 182

1

Dual 1x20 MUX

DUTs

(20)

20

1

20

1

20

HI

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 board traces, contacts, bus bars, and low-re-
sistance shunts.

Figure 4-6 shows a typical test configuration for a switching
system capable of testing a number of low resistance devices.
The Model 220 Current Source forces current through the
device under test, while the Model 182 Sensitive Digital
Voltmeter measures the resulting voltage across the device.

Since low voltage levels are being measured, thermal EMF
offsets generated by relay and connector contacts will have a

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Содержание 7015-C

Страница 1: ...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 IN...

Страница 2: ...tains 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 SO...

Страница 3: ...E 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 INS...

Страница 4: ...ion 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...

Страница 5: ...e 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...

Страница 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...

Страница 7: ...e 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 performi...

Страница 8: ...sis CONTACT TYPE Solid state switch CHANNEL RESISTANCE per conductor 210 CONTACT POTENTIAL 7015 C 5 V per channel contact pair 7015 S 4 V per channel contact pair OFFSET CURRENT 1nA ACTUATION TIME 500...

Страница 9: ...ipment 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 T...

Страница 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...

Страница 11: ...5 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...

Страница 12: ...mper 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 termin...

Страница 13: ...ion 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...

Страница 14: ...e 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...

Страница 15: ...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 Rep...

Страница 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 sealabl...

Страница 17: ...he 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 s...

Страница 18: ...g 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 sch...

Страница 19: ...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 1...

Страница 20: ...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...

Страница 21: ...plexer 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 Instrument...

Страница 22: ...d 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...

Страница 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 effe...

Страница 24: ...ntial 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 Measur...

Страница 25: ...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 M...

Страница 26: ...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 mult...

Страница 27: ...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 B...

Страница 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...

Страница 29: ...sed 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...

Страница 30: ...ate 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 tamin...

Страница 31: ...y 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 Backpla...

Страница 32: ...amp 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...

Страница 33: ...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...

Страница 34: ...e 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...

Страница 35: ...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...

Страница 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 as...

Страница 37: ...plexer 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 connecto...

Страница 38: ...head 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 No...

Страница 39: ...ument 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 con...

Страница 40: ...ed 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...

Страница 41: ...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...

Страница 42: ...ruments 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 B...

Страница 43: ...onnector 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...

Страница 44: ...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 Indivi...

Страница 45: ...scharged 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...

Страница 46: ...88 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...

Страница 47: ...xceed 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...

Страница 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 2...

Страница 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...

Страница 50: ...e 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 th...

Страница 51: ...l 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 volt...

Страница 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...

Страница 53: ...the Model 2001 is limited to the 200 range and above because the sense lead resistance is too high for the 20 range The Model 7015 can be configured for 20 channels of 4 pole operation by isolating Ba...

Страница 54: ...CAL 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...

Страница 55: ...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 w...

Страница 56: ...mple 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 enh...

Страница 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 2 4 FREQ TEMP REL TRIG STORE RECALL INFO L...

Страница 58: ...s 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...

Страница 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 ou...

Страница 60: ...nce 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 i...

Страница 61: ...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 volta...

Страница 62: ...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 methano...

Страница 63: ...he 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 H...

Страница 64: ...t 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 ambie...

Страница 65: ...1 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...

Страница 66: ...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...

Страница 67: ...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 Mo...

Страница 68: ...ING 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...

Страница 69: ...figured 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 ch...

Страница 70: ...e 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 othe...

Страница 71: ...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 Pro...

Страница 72: ...nput 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...

Страница 73: ...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 Differen...

Страница 74: ...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...

Страница 75: ...d 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...

Страница 76: ...er 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...

Страница 77: ...rmation 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 I...

Страница 78: ...thley 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...

Страница 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 updat...

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

Страница 81: ...uit 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...

Страница 82: ...rd 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 Q...

Страница 83: ...NCE 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...

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

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

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

Страница 87: ...1006 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...

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

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

Страница 90: ...V 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 6...

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

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

Страница 93: ...n 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 fi...

Страница 94: ...ipment 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...

Страница 95: ...alibration 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 p...

Страница 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...

Страница 97: ...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 IN...

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