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YOKOGAWA WT110 User Manual
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IM 253401-01E
4-2
Typical Waveform Types and Differences in Measured Values between
Measurement Modes
Name
Measurement
mode
Waveform
RMS
value
Mean
value
Mean-value
rectification
Linear
averaging
Sinewave
Half-wave
rectification
Full-wave
rectification
Direct
current
Triangular
wave
Square
wave
Pulse
Pulse
RMS
—
V MEAN
DC
Ep
2
Ep
2
Ep
2
Ep
Ep
3
Ep
D
·
Ep
τ
2
π
·
Ep
2
π
·
Ep
Ep
π
2
π
·
Ep
Ep
Ep
2
Ep
D
·
Ep
τ
2
π
·
Ep
Ep
2
Ep
2 2
Ep
2
π
2 2
·
Ep
π
4 2
·
Ep
π
2 2
·
Ep
π τ
4
π
2
·
Ep
π
D
2 2
·
Ep
D
·
Ep
τ
2
π
·
Ep
2
π
·
Ep
0
0
Ep
π
0
2
π
Ep
π
0
2
π
Ep
π
0
2
π
Ep
Ep
π
0
2
π
Ep
π
0
2
π
Ep
0
2
π
Ep
τ
Ep
π
0
Display
τ
2
π
When duty D (= ) is applied.
4.1 Selecting the Measurement Mode
39
41
Table of Contents
Foreword
2
Checking the Contents of the Package
3
Optional Equipment
4
Standard Accessories
4
Safety Precautions
5
How to Use this Manual
7
Conventions Used in this Manual
8
Table of Contents
9
Chapter 1 What this Instrument Can Do
13
System Configuration and Block Diagram
13
Functions
14
Digital Numbers/Characters, and Initial Menus
17
Chapter 2 Nomenclature, Keys and Displays
19
Front Panel, Rear Panel and Top View
19
Operation Keys and Function/Element Display
20
Displays in Case of Overrange/Error During Measurement
22
Chapter 3 Before Operation
23
Usage Precautions
23
Installing the Instrument
24
Wiring Precautions
26
Wiring the Measurement Circuit
27
Wiring the Measurement Circuit When Using External PT/CT
29
Wiring the Measurement Circuit When Using the External Sensor
31
Connecting the Power Supply
34
Turning the Power ON/OFF
35
Selecting the Wiring Method (for WT130)
37
Improving the Measurement Accuracy
38
Chapter 4 Setting Measurement Conditions
39
Selecting the Measurement Mode
39
Turning the Filter ON/OFF
41
Selecting the Measurement Range in Case of Direct Input
42
Setting the Scaling Value When External PT/CT Is Used
44
Selecting the Measurement Range and Setting the Scaling Value When External Sensor Is Used (Option)
46
Using the Averaging Function
48
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, Frequency
56
Measuring/Displaying Voltage, Current and Active Power
56
Measuring/Displaying Frequency
58
Measuring/Displaying Four Arithmetic Operation Value, Crest Factor and Peak Value
59
Computing/Displaying Apparent Power, Reactive Power and Power Factor
60
Computing/Displaying the Phase Angle
61
Chapter 6 Computing/Displaying Apparent Power, Reactive Power, Power
62
Chapter 7 Integration
62
Integrator Functions
62
Setting Integration Mode and Integration Timer
65
Displaying Integrated Values
66
Precautions Regarding Use of Integrator Function
68
Chapter 8 Using the Harmonic Analysis Function (Optional)
70
Harmonic Analysis Function
70
Averaging Function
71
Setting the Element, PLL Source and Harmonic Distortion Method
72
Switching the Harmonic Analysis Function ON/OFF
74
Setting the Harmonic Order and Displaying the Results of Harmonic Analysis
75
Chapter 9 Storing/Recalling
78
Storing/Recalling Measured Data
78
Storing/Recalling Set-Up Parameters
81
Remote Control and D/A Output Connector (Optional)
83
Chapter 10 Using External In/Output
84
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/Printer
99
Chapter 11 GP-IB Interface
103
Using the GP-IB Interface
103
Responses to Interface Messages
104
Status Byte Format (before the IEEE488.2-1987 Standard)
105
Parameters and Error Codes
106
Setting the Address/Addressable Mode
111
Setting the Output Items
112
Commands (before the IEEE488.2-1987 Standard)
114
Chapter 12 RS-232-C Interface
115
Using the RS-232-C Interface
115
Connecting the Interface Cable
116
Setting the Mode, Handshaking Method, Data Format and Baud Rate
118
Format and Commands of Output Data (Brefore the IEEE488.2-1987 Standard)
121
Chapter 13 Other Useful Functions
122
Back-Up of Set-Up Parameters
122
Initializing Set-Up Parameters
123
Chapter 14 Adjustment, Calibration and Trouble-Shooting
124
Adjustments
124
Calibration
127
In Case of Malfunctioning
133
Error Codes and Corrective Actions
134
Replacing the Fuse (for WT130)
136
Chapter 15 Specifications
137
Input
137
Measurement Functions
137
Frequency Measurement
137
Communication
137
Computing Functions
138
Display Functions
138
Integrator Functions
138
Internal Memory Function
138
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 Specifications
139
Total Harmonic Analysis Function (Optional)
139
External Dimensions
140
Appendix 1 Communication Commands
156
Appendix
157
Symbols Used in Syntax Descriptions
159
Messages
159
Commands
161
Responses
162
Data
162
Synchronization with the Controller
164
Command List
165
Aoutput Group
168
Communicate Group
169
Configure Group
171
Display Group
174
Harmonics Group
175
Integrate Group
176
MATH Group
177
Measure Group
178
Recall Group
184
Relay Group
185
Sample Group
187
Status Group
188
Store Group
189
Common Command Group
190
Overview of the Status Report
192
Status Byte
193
Standard Event Register
194
Extended Event Register
195
Output Queue and Error Queue
196
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YOKOGAWA WT110 Specifications
General
Brand
YOKOGAWA
Model
WT110
Category
Measuring Instruments
Language
English
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