YOKOGAWA WT110 - Page 129

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IM 253401-01E

14-6

14.2 Calibration

Calibration of AC Voltage, Current and Power

Wiring

Connect the Digital Power meter, Synchronizer and the AC voltage and AC current standard as

follows.

AC voltage

standard

AC voltage

standard

± EUT

Digital power

meter

Synchronizer

AC voltage

standard

EUT

EXT

± (A)

EXT

± (A)

EXT

± (A)

EUT:Equipment under test

• Direct input

• External sensor input (equipped with option /EX1)

Change as follows for wiring currents only.

Synchronizer

Main Page

Foreword2
Checking the Contents of the Package3
- Optional Equipment4
- Standard Accessories4
Safety Precautions5
How to Use this Manual7
Conventions Used in this Manual8
- Table of Contents9
Chapter 1 What this Instrument Can Do13
- System Configuration and Block Diagram13
- Functions14
- Digital Numbers/Characters, and Initial Menus17
Chapter 2 Nomenclature, Keys and Displays19
- Front Panel, Rear Panel and Top View19
- Operation Keys and Function/Element Display20
- Displays in Case of Overrange/Error During Measurement22
Chapter 3 Before Operation23
- Usage Precautions23
- Installing the Instrument24
- Wiring Precautions26
- Wiring the Measurement Circuit27
- Wiring the Measurement Circuit When Using External PT/CT29
- Wiring the Measurement Circuit When Using the External Sensor31
- Connecting the Power Supply34
- Turning the Power ON/OFF35
- Selecting the Wiring Method (for WT130)37
- Improving the Measurement Accuracy38
Chapter 4 Setting Measurement Conditions39
- Selecting the Measurement Mode39
- Turning the Filter ON/OFF41
- Selecting the Measurement Range in Case of Direct Input42
- Setting the Scaling Value When External PT/CT Is Used44
- Selecting the Measurement Range and Setting the Scaling Value When External Sensor Is Used (Option)46
- Using the Averaging Function48
- Using the Four Arithmetical Operation Function (Applies to WT110/WT130 with ROM Version 2.01 or Later)50
- Computing the Crest Factor (Applies to WT110/WT130 with ROM Version 2.01 or Later)53
- Computing the Efficiency (Applies to WT130 with ROM Version 2.01 or Later)54
Chapter 5 Measuring/Displaying Voltage, Current, Active Power, Frequency56
- Measuring/Displaying Voltage, Current and Active Power56
- Measuring/Displaying Frequency58
- Measuring/Displaying Four Arithmetic Operation Value, Crest Factor and Peak Value59
- Computing/Displaying Apparent Power, Reactive Power and Power Factor60
- Computing/Displaying the Phase Angle61
Chapter 6 Computing/Displaying Apparent Power, Reactive Power, Power62
Chapter 7 Integration62
- Integrator Functions62
- Setting Integration Mode and Integration Timer65
- Displaying Integrated Values66
- Precautions Regarding Use of Integrator Function68
Chapter 8 Using the Harmonic Analysis Function (Optional)70
- Harmonic Analysis Function70
- Averaging Function71
- Setting the Element, PLL Source and Harmonic Distortion Method72
- Switching the Harmonic Analysis Function ON/OFF74
- Setting the Harmonic Order and Displaying the Results of Harmonic Analysis75
Chapter 9 Storing/Recalling78
- Storing/Recalling Measured Data78
- Storing/Recalling Set-Up Parameters81
- Remote Control and D/A Output Connector (Optional)83
Chapter 10 Using External In/Output84
- Remote Control (Optional)84
- D/A Output (Optional)85
- Comparator Function (Optional)89
- Setting the Comparator Mode (Optional)91
- Setting the Comparator Limit Values (Optional)92
- Comparator Display (Optional)96
- Turning the Comparator Function ON/OFF (Optional)98
- Outputting to an External Plotter/Printer99
Chapter 11 GP-IB Interface103
- Using the GP-IB Interface103
- Responses to Interface Messages104
- Status Byte Format (before the IEEE488.2-1987 Standard)105
- Parameters and Error Codes106
- Setting the Address/Addressable Mode111
- Setting the Output Items112
- Commands (before the IEEE488.2-1987 Standard)114
Chapter 12 RS-232-C Interface115
- Using the RS-232-C Interface115
- Connecting the Interface Cable116
- Setting the Mode, Handshaking Method, Data Format and Baud Rate118
- Format and Commands of Output Data (Brefore the IEEE488.2-1987 Standard)121
Chapter 13 Other Useful Functions122
- Back-Up of Set-Up Parameters122
- Initializing Set-Up Parameters123
Chapter 14 Adjustment, Calibration and Trouble-Shooting124
- Adjustments124
- Calibration127
- In Case of Malfunctioning133
- Error Codes and Corrective Actions134
- Replacing the Fuse (for WT130)136
Chapter 15 Specifications137
- Input137
- Measurement Functions137
- Frequency Measurement137
- Communication137
- Computing Functions138
- Display Functions138
- Integrator Functions138
- Internal Memory Function138
- D/A Converter (Optional)138
- External Input (Optional)139
- Comparator Output (Optional)139
- External Control and Input Signals (in Combination with the D/A Converter and Comparator Options)139
- General Specifications139
- Total Harmonic Analysis Function (Optional)139
- External Dimensions140
Appendix 1 Communication Commands156
Appendix157
- Symbols Used in Syntax Descriptions159
- Messages159
- Commands161
- Responses162
- Data162
- Synchronization with the Controller164
- Command List165
- Aoutput Group168
- Communicate Group169
- Configure Group171
- Display Group174
- Harmonics Group175
- Integrate Group176
- MATH Group177
- Measure Group178
- Recall Group184
- Relay Group185
- Sample Group187
- Status Group188
- Store Group189
- Common Command Group190
- Overview of the Status Report192
- Status Byte193
- Standard Event Register194
- Extended Event Register195
- Output Queue and Error Queue196

YOKOGAWA WT110 - Page 129

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