YOKOGAWA CW120 - Chapter 2. Components and Indications; Front Panel and Connector Block

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2-1

IM CW120-E

Components and Indications

2

Chapter 2. Components and Indications

2.1 Front Panel and Connector Block

● Dimensions

Connector Block

Front View

117 51

Unit: mm

161

Side View

Table of Contents

Introduction3
Checking Items in the Package4
Precautions for Safe Use of the Instrument7
- Table of Contents9
Chapter 1. Product Overview13
- Product Overview13
Chapter 2. Components and Indications17
- Front Panel and Connector Block17
- Connecting Input Signals19
- Operation Keys and Display21
- Overrange and Other Marks Shown During Measurement22
Chapter 3. Precautions for Safe Measurement27
- Handling Precautions27
- Installation Procedure29
- Maintaining High Precision of Measurement31
Chapter 4. Connecting Power Supply and Turning Power On/Off33
- When Using AC Power Supply33
- When Supplying Power from Voltage Input35
- Startup Screens36
- Basic Operation Flow38
Chapter 5. Wiring39
- Precautions for Wiring the Circuit under Test39
- Diagrams of Basic Wiring40
- Wiring the Circuit under Test with External VT/CT42
- Indication and Change of Wiring Method43
- Wiring Check Function44
Chapter 6. Setting Ranges and Wiring Method49
- Ranges and Display Digits49
- Changing Voltage Range Setting54
- Changing Current Range Setting55
- Changing Wiring Method Setting58
Chapter 7. Making Settings61
- Setting Items and Item Selection61
- Setting each Item64
- Setting Name of Measured-Data File92
Chapter 8. Instantaneous Value Measurement93
- Measuring Instantaneous Values93
- Switching Display Contents94
- Saving Data96
- Frequency Measurement99
- Sampling Cycle and Integration Cycle100
Chapter 9. Electric Energy Measurement101
- Measuring Electric Energy101
- Starting and Stopping Integration103
- Switching Display Contents110
- Saving Data112
- Backup Memory115
- External Control Input/Output118
- Meter Actions Upon Power Failure and Recovery121
Chapter 10. PC Card123
- PC Card Specifications123
- Inserting and Removing PC Card124
- Storage Capacity125
- Formatting PC Card126
- Saving and Loading From/To PC Card127
- Interface with Personal Computer129
Chapter 11 Communication Functions131
- Rs-232131
- Rs-485136
- Data Format139
Chapter 12. Auxiliary Functions141
- Convenient Functions141
- Using Optional Printer143
Chapter 13. Troubleshooting147
- Corrective Measures in Case of Failure147
- Error Codes148
Chapter 14. Specifications149
- Specifications of CW120/121149
- Specifications of Clamp-On Current Probes156
Appendix161
Appendix 1. Circuit Block Diagram161
Commands164
- Messages164
Appendix 2. Communication Commands165
- Commands166
  - Response167
- Responses167
- Data168
  - Messages on RS-485170
- Communication Commands174
  - Output Queue and Error Queue174
- Detailed Description of Communication Commands174
- Error Messages182
- Command Effectiveness Tables186
Appendix 3. File Structures and Data Items Printed191
- Overview192
- Measured Data193
- File Format193
- Print Format195
  - Print Item Titles and Data Formats195
- Settings196
- File Format196
- Output Format and Data Values197
- Print Format199
- Automatic File Naming200
Index201

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