Name: Keysight Technologies 34972A
Brand: Keysight Technologies
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Keysight 34970A/34972A

Data Acquisition/Switch Unit

Service Guide

Copyright Notice2
Declaration of Conformity2
Safety Information2
Technology Licenses2
Software Updates/Licenses3
Safety Symbols4
General5
- Before Applying Power5
- Ground the Instrument5
- Do Not Operate in an Explosive Atmosphere5
- Do Not Remove the Instrument Cover6
- Do Not Modify the Instrument6
- In Case of Damage6
Safety Considerations5
Environmental Conditions7
Regulatory Markings8
Sales and Technical Support9
Waste Electrical and Electronic Equipment (WEEE) Directive9
- Product Category9
The Front Panel at a Glance11
The Front-Panel Menu at a Glance12
Display Annunciators14
The 34970A Rear Panel at a Glance16
The 34972A Rear Panel at a Glance17
The Plug-In Modules at a Glance18
A Multifunction Module20
In this Book21
Table of Contents23
Specifications29
1 Specifications30
Quick Start32
- To Prepare the Instrument for Use33
- Quick Start33
- To Connect Wiring to a Module34
- To Set the Time and Date36
- To Configure a Measurement Channel37
- To Monitor a Single Channel38
- To Close a Channel39
- If the Instrument Does Not Turn on41
- To Adjust the Carrying Handle43
- To Rack Mount the Instrument44
Front-Panel Overview48
- Front-Panel Menu Reference49
- Front-Panel Overview49
- To Unsecure for Calibration52
- To Secure against Calibration53
- To Change the Security Code54
- Error Messages55
- To Perform a Zero Adjustment56
- To Apply MX+B Scaling to Measurements57
- To Read the Relay Cycle Count58
- To Read a Digital Input Port59
- To Write to a Digital Output Port60
- To Read the Totalizer Count61
- To Output a DC Voltage62
Calibration Procedures64
- Keysight Technologies Calibration Services66
- Calibration Interval66
  - Adjustment Is Recommended66
- Time Required for Calibration67
- Automating Calibration Procedures67
- Recommended Test Equipment68
- Input Connections69
- Calibration Security71
  - To Unsecure the Instrument Without the Security Code72
- Calibration Message74
- Calibration Count74
- Calibration Procedure75
- Aborting a Calibration in Progress75
- Test Considerations76
- Performance Verification Tests77
  - Self-Test78
  - Quick Performance Check79
  - Performance Verification Tests79
- Internal DMM Verification Tests80
  - Zero Offset Verification80
  - Gain Verification82
- Optional AC Performance Verification Tests87
- Internal DMM Adjustments88
  - Zero Adjustment88
  - Gain Adjustment89
- VDC Adjustment Procedure (Optional)92
- Plug-In Module Test Considerations94
- Relay Verification95
  - Relay Cycle Count95
  - (Optional) 34901A Relay Contact Resistance Verification96
  - (Optional) 34902A Relay Contact Resistance Verification103
  - (Optional) 34903A Relay Contact Resistance Verification108
  - (Optional) 34904A Relay Contact Resistance Verification109
  - (Optional) 34905/06A Relay Contact Resistance Verification112
  - (Optional) 34908A Relay Contact Resistance Verification113
- Thermocouple Reference Junction (Optional)119
  - Thermocouple Reference Junction Verification119
  - Thermocouple Reference Junction Adjustments120
- 34907A Analog Output122
  - Analog Output Verification Test122
  - Analog Output Adjustment123
  - 5 Theory of Operation125
Theory of Operation Theory of Operation126
- System Block Diagram127
- Floating Logic128
- Memory131
- Earth-Referenced Logic132
- Power Supplies133
- Front Panel135
- Backplane136
  - Analog Bus136
  - Digital Bus136
- Internal DMM137
- Switch Modules146
- Multifunction Module162
Service169
- Service170
- Service Service170
- Operating Checklist171
- Types of Service Available172
- Cleaning173
- Repackaging for Shipment173
- Electrostatic Discharge (ESD) Precautions174
- Surface Mount Repair174
- To Replace the Power-Line Fuse175
- Troubleshooting Hints175
- Self-Test Procedures179
- Disassembly184

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Keysight Technologies 34972A Specifications

General

Brand	Keysight Technologies
Model	34972A
Category	Switch
Language	English

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