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Keithley 7035 Instruction Manual

9-bank, 1x4 multiplexer card
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  • Page 1 (217) 352-9330 | Click HERE Find the Keithley 7035 at our website:...
  • Page 2 Instruction Manual Model 7035 9-Bank, 1×4 Multiplexer Card Contains Operating and Servicing Information 7035-901-01 Rev. A / 5-97...
  • Page 3 WARRANTY Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of 1 year from date of shipment. Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable batteries, diskettes, and documentation.
  • Page 4 Model 7035 9-Bank, 1 ×4 Multiplexer Card Instruction Manual ©1997, Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio, U.S.A. First Printing, May 1997 Document Number: 7035-901-01 Rev. A...
  • Page 5 Therefore, it is recommended that you review the Manual Update History. Revision A (Document Number 7035-901-01)..................May 1997 All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc. Other brand and product names are trademarks or registered trademarks of their respective holders.
  • Page 6 (IEC) Standard IEC 664, digital multimeter measuring circuits The types of product users are: (e.g., Keithley Models 175A, 199, 2000, 2001, 2002, and 2010) measuring circuits are Installation Category II. All other instru- Responsible body is the individual or group responsible for the use ments’...
  • Page 7 fire hazard. leads, and input jacks, must be purchased from Keithley Instru- ments. Standard fuses, with applicable national safety approvals, Chassis connections must only be used as shield connections for may be used if the rating and type are the same.
  • Page 8 7035 S ODEL PECIFICATIONS MULTIPLEX CONFIGURATION: Nine independent 1×4 2-pole multiplex banks. Bank A CONTACT CONFIGURATION: 2-pole Form A (Hi, Lo). CONNECTOR TYPE: 96-pin male DIN connector. Channel 1 MAXIMUM SIGNAL LEVEL: 60VDC, 30V rms, 42V peak betwen any two inputs or chassis, 1A switched. 30VA (resistive load).

  • Page 9: Table Of Contents

    Table of Contents General Information Introduction ................................. 1-1 Features ................................1-1 Warranty information............................1-1 Manual addenda ..............................1-2 Safety symbols and terms ........................... 1-2 Specifications ..............................1-2 Unpacking and inspection ........................... 1-2 Inspection for damage ..........................1-2 Handling precautions ..........................1-2 Shipping contents ............................
  • Page 10 Introduction ................................. 3-1 Handling precautions............................3-1 Multi-pin (mass termination) connections......................3-1 Typical connection technique........................3-4 Typical connection scheme ......................... 3-6 Model 7035 installation and removal ........................3-8 Card installation............................3-8 Card removal ............................... 3-8 Operation Introduction ................................. 4-1 Power limits................................. 4-1 Maximum signal levels..........................
  • Page 11 Power-on safeguard........................... 5-18 Troubleshooting ..............................5-18 Troubleshooting equipment ........................5-18 Troubleshooting access ..........................5-18 Troubleshooting procedure ........................5-18 Replaceable Parts Introduction ................................. 6-1 Parts lists ................................6-1 Ordering information ............................6-1 Factory service ..............................6-1 Component layouts and schematic diagrams ...................... 6-1 Index...
  • Page 12 Figure 3-4 Model 7011-KIT-R (cable) assembly ......................3-5 Figure 3-5 Typical connection scheme for Model 7035....................3-7 Figure 3-6 Model 7035 card installation in Model 7001 ....................3-8 Operation Figure 4-1 Model 7001 channel status display ......................4-2 Figure 4-2 Model 7002 channel status display (slot 1)....................
  • Page 13 Channel-to-channel isolation test connections ..................5-10 Figure 5-6 Differential isolation test connections ....................... 5-13 Figure 5-7 Common-mode isolation test connections....................5-15 Figure 5-8 Model 7035 block diagram........................5-16 Figure 5-9 Start and stop sequences..........................5-17 Figure 5-10 Transmit and acknowledge sequence ......................5-17...
  • Page 14 Troubleshooting procedure ........................5-19 Replaceable Parts Table 6-1 Relay board for Model 7035 parts list ......................6-2 Table 6-2 Mass-terminated connector board for Model 7035 parts list ..............6-3 Table 6-3 Model 7011-KIT-R 96-pin female DIN connector kit parts list ..............6-3...

  • Page 15: General Information

    External test cir- • Low contact potential and offset current for minimal cuit connections to the Model 7035 are made via the 96-pin effects on low-level signals. male DIN connector on the connector card. Keithley offers a •...

  • Page 16: Manual Addenda

    Model 7002 Instruction Manual. After removing the plastic wrapping, place the manual in the binder following the main- Model 7035 specifications may be found at the front of this frame instruction manual. Note that a manual identification manual. These specifications are exclusive of the Model tab is included and should precede the multiplexer card 7001/7002 mainframe specifications.

  • Page 17: Repacking For Shipment

    General Information Repacking for shipment Optional accessories Should it become necessary to return the Model 7035 for The following accessories are available for use with the repair, carefully pack the unit in its original packing carton, Model 7035: or the equivalent, and include the following information: Model 7011-MTC-2 —...

  • Page 18: Multiplexer Configuration

    Bank F Basic multiplexer configuration Bank G A simplified schematic of the Model 7035 multiplex banks is shown in Figure 2-1. It is organized as nine independent Bank H 1 ×4 banks. Each bank has four inputs and one output. Two- pole switching is provided for each multiplexer input, with HI and LO switched.

  • Page 19: Typical Multiplexer Switching Schemes

    Multiplexer Configuration Input 1-4 Bank A-I Optional Shield Source or 7035 Measure Figure 2-2 Single-ended switching example single pathway as shown in Figure 2-2. The instrument is Typical multiplexer switching schemes connected to the output of one of the banks, and the DUT is shown connected to one of the inputs for that bank.

  • Page 20: Sensing

    Sensing example SMU connections Sensing Figure 2-5 shows how to connect a Keithley Model 236, 237, Figure 2-4 shows how the multiplexer can be configured to or 238 Source Measure Unit to the multiplexer. By using use instruments that have sensing capability. The main...

  • Page 21: Multiplexer Expansion

    Multiplexer Configuration Multiplexer expansion Larger multiplexers can be configured by externally connect- ing the individual Model 7035 multiplex banks using cus- tomer-supplied external jumpers. You can configure a multiplexer as large as 1 ×36 (Figure 2-6). Inputs Bank A Output A...

  • Page 22: Card Connections And Installation

    Make sure to handle the cards by the edges and shields nector card. to avoid contamination. • Model 7035 installation and removal ⎯ Provides the procedure to install and remove the card assembly from The connector will mate to a 96-pin female DIN connector.
  • Page 23 Card Connections and Installation 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 View pin side of connector Bank A Bank B Bank C...
  • Page 24 Not Used Not Used Shield Not Used Not Used Keithley has a variety of cable and connector accessories Table 3-2 available to accommodate connections from the connector Mass termination accessories card to test instrumentation and DUTs (devices under test). Model...

  • Page 25: Typical Connection Technique

    (plugged in) after the Model that you want to connect to the card must be terminated with 7035 assembly is installed in the Model a single 96-pin female DIN connector. The following con- 7001/7002 mainframe. Installation is cov- nection techniques provide some guidelines and suggestions ered at the end of this section.
  • Page 26 Card Connections and Installation View from solder cup side of connector Note: See Figure 3-1 and Table 3-1 for terminal identification. Figure 3-3 Model 7011-MTR connector pinout In Figure 3-2B, connections are accomplished using a Model 7011-MTC-2 cable assembly that is cut in half. The 96-pin female DIN connector on one end of the cable mates directly to the multi-pin connector card.

  • Page 27: Typical Connection Scheme

    The following information provides a typical connection and the Model 7035 card. Notice that the bulkhead connector scheme for the Model 7035. Keep in mind that this is only an is shown mounted to a fixture to help keep the cabling stable example to demonstrate wiring a test system.
  • Page 28 HI and LO to Bank G Instrument HI and LO to Bank H Instrument HI and LO to Bank I Instrument Model 7011-MTC-2 Cable Assembly 7011-MTR Bulkhead Connector DUT Test Fixture Instruments DUTs 7035 Simplified Equivalent Circuit Figure 3-5 Typical connection scheme for Model 7035...

  • Page 29: Model 7035 Installation And Removal

    2. Facing the rear panel of the Model 7001/7002, select the WARNING slot that you wish to install the Model 7035 card in. Installation or removal of the Model 3. Referring to Figure 3-6, feed the Model 7035 card into 7035 is to be performed by qualified ser-...

  • Page 30: Operation

    Mainframe control of card • Multiplexer switching examples — Provides some The following information pertains to the Model 7035. It typical applications for using the Model 7035. assumes that you are familiar with the operation of the Measurement considerations — Reviews a number of •...

  • Page 31: Channel Assignments

    Operation 7001 Display CARD 1 CARD 2 = Open Channel = Closed Channel Figure 4-1 Model 7001 channel status display Channel assignments To control the card from the mainframe, each multiplexer input must have a unique channel assignment that includes The Model 7001 has a channel status display (Figure 4-1) the slot number that the card is installed in.
  • Page 32 Operation Bank Channel Used Used Used Used Figure 4-3 Display organization for multiplexer channels 1!10 1!11 1!12 1!13 1!14 1!15 1!16 1!17 1!18 1!19 1!20 1!21 1!22 1!23 1!24 1!25 1!26 1!27 1!28 1!29 1!30 A. Slot 1 1!31 1!32 1!33 1!34 1!35...

  • Page 33: Closing And Opening Channels

    Operation Closing and opening channels Scanning channels A channel is closed from the front panel by simply keying in Multiplexer channels are scanned by creating a scan list and the channel assignment and pressing CLOSE. For example, configuring the Model 7001/7002 to perform a scan. The to close channel 6 (input 6 of bank B) of a multiplexer card scan list is created in the same manner as a channel list (See installed in slot 2, key in the following channel list and press...

  • Page 34: Ieee-488 Bus Operation

    Bus operation is demonstrated using Microsoft QuickBASIC channel count to the number of channels in the scan list, the 4.5, the Keithley KPC-488.2 (or Capital Equipment Corpo- third command defines the scan list, and the fourth command ration) IEEE interface, and the HP-style Universal Language takes the Model 7001/7002 out of the idle state.

  • Page 35: Multiplexer Switching Examples

    The Model 7035 can be used to test a large number of resis- tors using only one test instrument or group of instruments. Accuracy of measurements can be optimized by minimizing Such tests include two-wire and four-wire resistance mea- stray resistance.

  • Page 36: Four-Wire Resistance Tests

    Model 2000 DMM should be used. Sense Ω 4 Wire Measurement considerations Many measurements made with the Model 7035 are subject to various effects that can seriously affect low-level measure- Dual 1×4 MUX ment accuracy. The following paragraphs discuss these A.

  • Page 37: Magnetic Fields

    To minimize capacitance, keep all cables as short as possible. Magnetic fields Measure 7035 Mux Instrument Card When a conductor cuts through magnetic lines of force, a very small current is generated. This phenomenon will fre-...

  • Page 38: Ground Loops

    Ground Loop Current AC frequency response Power Line Ground The AC frequency response of the Model 7035 is important Figure 4-10 in test systems that switch AC signals. Refer to the specifica- Power line ground loops tions at the front of this manual.
  • Page 39 Operation 4-10...

  • Page 40: Service Information

    Handling and cleaning precautions WARNING The information in this section is Because of the high-impedance areas on the Model 7035, intended only for qualified service per- care should be taken when handling or servicing the card to sonnel. Some of the procedures may prevent possible contamination.

  • Page 41: Performance Verification

    96-pin female DIN connector Contamination will degrade the perfor- then mating it to the connector on the Model 7035. Input and mance of the card. To avoid contamina- output shorting connections can also be done at the connec- tion, always grasp the card by the side tor.

  • Page 42: Channel Resistance Tests

    Channel resistance tests (H) terminal of bank A. Perform the following steps to verify that each contact of 8. Install the Model 7035 in slot 1 (CARD 1) of the Model every relay is closing properly and that the resistance is 7001/7002.

  • Page 43: Offset Current Tests

    15. Repeat steps 7 through 13 to check that the common 5. Connect the triax cable to bank A HI and LO, as shown mode offset current is <100pA. in A. 6. Install the Model 7035 in slot 1 (CARD 1) of the main- frame.
  • Page 44 Model 6517A (Measure Current) Note: Setup shown is configured to test Bank A pathways for offset current. Bank Outputs Model 7025 odel 7035 Unterminated A) Differential Triax Cable Bank Inputs WARNING: WARNING: NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.

  • Page 45: Contact Potential Tests

    1. Cut the short on bank I output HI to LO. 1. Turn off the Model 7001/7002 mainframe if it is on. 12. Install the Model 7035 in mainframe slot 1, and turn on 2. Place jumpers between banks A-B, B-C, C-D, D-E, E-F, power.
  • Page 46 LSTN Model 182 Note: Setup shown is configured to test Banks A through I relays for contact potential. Bank Outputs Customer-supplied jumpers Low thermal short. Clean, high purity copper (1 of 1) Model 7035 Figure 5-3 Contact potential test connections...

  • Page 47: Bank And Channel-To-Channel Isolation Tests

    In general, the tests are performed by applying a volt- Figure 5-4. age (60V) across the leakage resistance and then measuring 4. Install the Model 7035 in slot 1 (CARD 1) and turn on the current. The isolation resistance is then calculated as the mainframe.
  • Page 48 Bank H and Bank I 1!30 and 1!35 Bank H, Input 3 to Bank I, Input 4 Bank H and Bank I 1!31 and 1!36 *Assumes Model 7035 is installed in slot 1 of the mainframe. Program as slot (1) and channel.
  • Page 49 20. Use Table 5-3 (test numbers 4 through 29) and steps 6 Figure 5-5. through 19 to test banks B through I inputs. Move the 14. Install the Model 7035 in slot 1 and turn on the main- electrometer connections shown in Figure 5-5 to the frame.
  • Page 50 Bank I, Input 34 to Bank I, Input 35 Bank I and Input 34 1!35 Bank I, Input 35 to Bank I, Input 36 Bank I and Input 35 1!36 *Assumes Model 7035 is installed in slot 1 of the mainframe. Program as slot (1) and channel. 5-11...

  • Page 51: Differential And Common-Mode Isolation Tests

    A as shown in Figure 5-6. voltage and current levels and displays the resistance value. 6. Install the Model 7035 in slot 1 (CARD 1), and turn on the mainframe. Perform the following steps to check differential and com- mon mode isolation: 7.
  • Page 52 FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING. Source V and Measure V/I Model 6517A Unterminated Banana Cable Note: Setup shown is configured to test isolation between HI and Bank LO of Bank A. Outputs Model 7035 Figure 5-6 Differential isolation test connections 5-13...
  • Page 53 Bank E None Bank E, Input 17 1!17 Bank E, Input 18 1!18 Bank E, Input 19 1!19 Bank E, Input 20 1!20 *Assumes Model 7035 is installed in slot 1 of the mainframe. Program as slot (1) and channel. 5-14...
  • Page 54 FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING. Source V and Measure V/I Model 6517A Unterminated Banana Cable Note: Setup shown is configured to test isolation between Bank A and chassis ground. Bank Outputs Model 7035 Figure 5-7 Common-mode isolation test connections 5-15...

  • Page 55: Special Handling Of Static-Sensitive Devices

    The paragraphs below discuss the basic operating principles mended that they all be treated as static-sensitive. for the Model 7035 and can be used as an aid in troubleshoot- ing the card. The schematic drawings of the Model 7035 card 1.

  • Page 56: Id Data Circuits

    Service Information ID data circuits 4. Once all data is received, the mainframe sends a stop command, which is a low-to-high transition of the Upon power-up, card identification information from each IDDATA line with the IDCLK line held high card is read by the mainframe. This ID data includes such (Figure 5-9).
  • Page 57 Do not touch edge connectors, board surfaces, or components on the Table 5-5 summarizes recommended equipment for trouble- card. Also, do not touch areas adjacent shooting the Model 7035. to electrical contacts on connectors. Table 5-5 Use care when removing relays from the...
  • Page 58 Service Information Table 5-6 Troubleshooting procedure Step Item/component Required condition Comments GND test point (C114) All voltages referenced to digital ground (GND pad). +6V pad (Q101, pin 2) +6VDC Relay voltage. +5V pad (C103) +5VDC Logic voltage. +15V pad (R101) +15VDC Relay bias voltage.
  • Page 59 Service Information 5-20...
  • Page 60 Card for Model 7035. Factory service 7035-176 — Schematic, Mass-Terminated Connector Card for Model 7035. If the card is to be returned to Keithley Instruments for repair, Table 6-3 — Parts List, Model 7011-KIT-R 96-pin Female perform the following: DIN Connector Kit.
  • Page 61 Replaceable Parts Table 6-1 Relay card for Model 7035 parts list Circuit Keithley designation Description part no. 2-56 ×3/16 PHILLIPS PAN HEAD SCREW 2-56 ×3/16PPH (RELAY BOARD TO SHIELD) 2-56 ×5/8 PHILLIPS PAN HEAD FASTENER FA-245-1 2-56 ×5/16 PHILLIPS PAN HEAD SEMS SCREW 2-56 ×5/16PPHSEM...
  • Page 62 Replaceable Parts Table 6-2 Mass-terminated connector card for Model 7035 parts list Circuit Keithley designation Description part no. 2-56 ×3/16 PHILLIPS PAN HEAD SCREW (FOR SHIELD) 2-56 ×3/16PPH 2-56 ×3/8 PHILLIPS PAN HEAD SCREW (FOR BRACKET) 2-56 ×3/8PPH 2-56 ×7/16 PHILLIPS PAN HEAD SCREW 2-56 ×7/16PPH...
  • Page 69 Index AC frequency response 5-14 Card connections and installation 4-1 DC parameter checks 5-11 Analog matrix maximum signal Card installation 4-18 Differential and common-mode levels 5-1 Card removal 4-18 isolation test 6-8 Channel assignments 5-2 Differential switching 2-3 Channel functionality test 6-10 Digital I/O configuration 3-1 Channel resistance tests 6-3 Digital I/O connections 4-2...
  • Page 70 Factory service 7-1 Keeping connectors clean 5-14 Partial matrix implementation 2-9 Features 1-1 Parts lists 7-1 Four-terminal ohms measurements 5-8 Path isolation 5-12 Path isolation tests 6-7 Performance verification 6-2 Power-on safeguard 6-13 Magnetic fields 5-13 Power limits 5-1 Mainframe control of the card 5-1 Principles of operation 6-11 General information 1-1 Mainframe matrix expansion 2-8...
  • Page 71 Thick film resistor network testing 5-7 Unpacking and inspection 1-2 Transistor testing 5-10 Troubleshooting 6-14 Troubleshooting access 6-14 Troubleshooting equipment 6-14 Troubleshooting procedure 6-14 Voltage divider checks 5-8 Turning channels on and off 5-5 Voltage source jumper 4-2 Two-card switching systems 2-5 Two-card system 4-12 Two-mainframe system 4-14 Typical connection techniques 4-8...
  • Page 72 Service Form 0RGHO 1R 6HULDO 1R 'DWH 1DPH DQG 7HOHSKRQH 1R &RPSDQ\ /LVW DOO FRQWURO VHWWLQJV GHVFULEH SUREOHP DQG FKHFN ER[HV WKDW DSSO\ WR SUREOHP ❏ ❏ ❏ ,QWHUPLWWHQW $QDORJ RXWSXW IROORZV GLVSOD\ 3DUWLFXODU UDQJH RU IXQFWLRQ EDG VSHFLI\ ❏ ❏...
  • Page 73 Keithley Instruments, Inc. 28775 Aurora Road Cleveland, Ohio 44139 Printed in the U.S.A.

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