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Appendix 7 Unstable Measured Values

A20

Figure. 17 Flow of Current in the Test State

SOURCE A

SENSE A

SOURCE B

SENSE B

Current

Current probes

Figure. 18 Difference between

Mounted State and Test State

Resistance value in mounted state

Resistance value in test state

Table of Contents

Chapter 1 Overview5
- Table of Contents5
- Introduction9
- Verifying Package Contents9
- Safety Information11
- Operating Precautions13
Appendix 7 Unstable Measured Values21
Chapter 1 Overview23
- Product Overview and Features23
- Front Panel25
- Names and Functions of Parts25
- Rear Panel26
- Measurement Process27
- Screen Organization and Operation Overview29
Chapter 2 Measurement Preparations33
- Connecting the Power Cord33
- Connecting Measurement Leads34
- Connecting Z2001 Temperature Sensor (When Using the TC)35
- Turning the Power on and off36
- Pre-Operation Inspection38
Appendix 11Checking Measurement Faults33
Chapter 3 Basic Measurements39
- Selecting the Measurement Range40
- Setting the Measurement Speed41
- Connecting Measurement Leads to the Measurement Target42
- Checking Measured Values43
  - Confirming Measurement Faults46
  - Holding Measured Values49
Chapter 4 Customizing Mea- Surement Conditions51
- Zero Adjustment52
  - Stabilizing Measured Values (Averaging Function)58
- Correcting for the Effects of Temperature (Temperature Correction (TC))60
- Correcting Measured Values and Displaying Physical Properties Other than Resistance Values (Scaling Function)62
- Changing the Number of Measured Value Digits66
Chapter 5 Judgment Function67
- Judging Measured Values (Comparator Function)68
Chapter 6 Saving and Loading Panels (Saving and Loading Measure- Ment Conditions)79
- Saving Measurement Conditions (Panel Save Function)80
- Loading Measurement Conditions (Panel Load Function)81
  - Preventing Loading of Zero-Adjustment81
  - Preventing Loading of Zero-Adjustment Values82
- Changing Panel Names83
- Deleting Panel Data84
Chapter 7 System Settings85
- Disabling and Enabling Key Operations86
  - Disabling Key Operations (Key-Lock Function)86
  - Re-Enabling Key Operations (Key-Lock Cancel)87
- Power Line Frequency Manual Setting88
- 7.2 Power Line Frequency Manual Setting89
- Enabling or Disabling the Key Beeper90
- Adjusting Screen Contrast91
- Adjusting the Backlight92
- Initializing (Reset)93
- Initializing (Reset)95
Chapter 8 External Control97
- (Ext I/O)97
Chapter 9 Communications129
- (USB/ RS-232C Interface)129
- Overview and Features129
  - Specifications130
- Preparations before Use (Connections and Settings)131
  - Using the USB Interface131
  - Using the RS-232C Interface134
- Controlling the Instrument with Commands and Acquiring Data138
  - Remote and Local States138
  - Displaying Communications Commands (Communications Monitor Function)139
Chapter 10 Printing (Using an RS-232C Printer)145
- Connecting the Printer to the Instrument145
- Printing148
  - Printing Measured Values and Comparator Judgments148
  - Printing List of Measurement Conditions and Settings148
Chapter 11 Specifications153
- Instrument Specifications153
Chapter 12 Maintenance and Service167
- Q&A (Frequently Asked Questions)168
- Troubleshooting168
- Troubleshooting177
  - Error Displays and Remedies177
- Replacing the Measurement Circuit's Protective Fuse179
- Inspection and Repair180
Appendix181
Appendix 1 Block Diagram181
Appendix 2 Four-Terminal (Voltage-Drop) Method182
Appendix 3 DC and AC Measurement183
Appendix 4 Temperature Correction (TC) Function184
Appendix 5 Effect of Thermal EMF186
Appendix 6 Zero Adjustment188
Appendix 8 Detecting the Location of a Short on a Printed Circuit Board201
Appendix 9 JEC 2137 Induction Machine-Com- Pliant Resistance Measurement202
Appendix 10Making Your Own Measurement Leads203
- Specifications (P204
Appendix 12Using the Instrument with a206
- Withstanding Voltage Tester206
Appendix 13Measurement Leads (Options)207
Appendix 14Rack Mounting208
Appendix 15Dimensional Diagram211
Appendix 16Calibration212
Appendix 17Adjustment Procedure216
Appendix 18Instrument Settings (Memo)217

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