Keithley 7012-S

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Table of Contents10
Introduction15
Features15
Warranty Information16
Manual Addenda16
Safety Symbols and Terms16
Specifications16
Unpacking and Inspection16
Inspection for Damage16
Shipping Contents16
Instruction Manual17
Repacking for Shipment17
Optional Accessories17
- Figure18
- Model 7012 Simplified Schematic18
- Figure19
- Model 7001 Analog Backplane19
Introduction18
Basic Matrix Configuration (4 × 10)18
- Figure20
- Single-Ended Switching Example20
Matrix Row Connections to Backplane20
Typical Matrix Switching Schemes20
Single-Ended Switching20
- Differential Switching Example21
- Figure21
- Figure 2-6 Sensing Example21
Differential Switching21
Sensing21
Figure 2-7 SMU Connections22
SMU Connections22
Matrix Expansion22
Two-Card Switching Systems22
Two Separate 4 × 10 Matrices23
- Figure23
- Figure24
- Narrow Matrix Example (4 × 20)24
- Figure 2-10 Wide Matrix Example (8 × 10)25
Figure 2-11 Mixed Card Type Example26
Mainframe Matrix Expansion26
Introduction28
Handling Precautions28
Connections28
- Figure29
- Figure 3-1 Backplane Row Jumpers29
- Figure30
- Typical Terminal Block Connections30
Backplane Row Jumpers29
Screw Terminal Connector Card29
Multi-Pin (Mass Termination) Connector Card31
- Cable Clamp for Screw Terminal Connector Card31
- Figure31
- Multi-Pin Connector Card Terminal Identification32
- Figure32
- Typical Round Cable Connection Techniques34
- Figure34
- Model 7011-MTR Connector Pinout35
- Figure35
- Model 7011-KIT-R (with Cable) Assembly35
Typical Connection Schemes36
Single Card System36
Two-Card System36
Single Card System Example (Multi-Pin Connector Card)37
Two-Mainframe System41
Model 7012 Installation and Removal41
Figure42
Introduction47
Power Limits47
Mainframe Control of Matrix Card47
Channel Assignments48
- Channel Status Display48
- Figure48
- Display Organization for Multiplexer Channels49
- Figure49
- Model 7012 Programming Channel Assignments49
Front Panel Control50
IEEE-488 Bus Operation50
Matrix Switching Examples51
Thick Film Resistor Network Testing51
- Figure52
- Four-Terminal Ohms Measurements52
- Figure53
- Voltage Divider Checks54
Transistor Testing56
Figure 4-7 Transistor Testing56
Figure 4-8 DC Parameter Checks58
Measurement Considerations59
Path Isolation59
Magnetic Fields60
Radio Frequency Interference60
Ground Loops60
Keeping Connectors Clean61
AC Frequency Response61
Introduction63
Handling and Cleaning Precautions63
Performance Verification64
Environmental Conditions64
Recommended Equipment64
- Verification Equipment64
Matrix Card Connections65
Channel Resistance Tests65
Offset Current Tests66
Contact Potential Tests68
Path Isolation Tests69
Differential and Common-Mode Isolation Tests71
Special Handling of Static-Sensitive Devices73
- Differential and Common-Mode Isolation Testing73
Principles of Operation74
Block Diagram74
ID Data Circuits75
Relay Control75
Relay Power Control76
Power-On Safeguard76
Troubleshooting77
Troubleshooting Equipment77
Troubleshooting Access77
Troubleshooting Procedure77
- Recommended Troubleshooting Equipment77
- Table77
Introduction79
Parts Lists79
Ordering Information79
Factory Service79
Component Layouts and Schematic Diagrams80

Keithley 7012-S - Page 86

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