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YOKOGAWA Manuals
Measuring Instruments
WT230
User manual
YOKOGAWA WT230 User Manual
Digital power meter
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Product Registration
Functional Comparison of the WT210/WT230 and WT200/WT110E/WT130
Safety Precautions
Startup Guide
Wiring the Circuit
(Wiring a Three-Phase, Three-Wire System)
Installing the WT230
Connecting the WT230 Power Supply
Turning on the Power to the WT230
(Wiring a Single-Phase, Two-Wire System)
Wiring the Circuit on the Primary Side of the Inverter
Checking the Contents of the Package
Standard Accessories
Structure of the Manual
Conventions Used in this Manual
Table of Contents
Functions
Wiring the Circuit on the Secondary Side of the Inverter
Selecting the Wiring System
Selecting the Measurement Range
Selecting the Voltage Range
Selecting the Current Range
Turning on the Power to the Circuit under Measurement
Displaying Voltage, Current, and Active Power
Displaying the Voltage on the Primary Side of the Inverter on Display a
Displaying the Current on the Primary Side of the Inverter on Display B
Displaying the Active Power on the Primary Side of the Inverter on Display C
Displaying the Voltage of the Secondary Side of the Inverter on Display a
Displaying the Current on the Secondary Side of the Inverter on Display B
Displaying the Active Power on the Secondary Side of the Inverter on Display C
Displaying the Efficiency
Setting the Efficiency Computation
Displaying the Efficiency
Confirming the Displayed Efficiency
System Configuration and Block Diagram
Functions
Digital Numbers and Characters and Initial Menus
Front Panel, Rear Panel, and Top View
Operation Keys and Functions/Element Display
Auto Range Monitor, Overrange, and Error Displays During Measurement
Handling Precautions
Installing the Instrument
Wiring Precautions
For Making Accurate Measurements
Connecting the Power Supply
Turning ON/OFF the Power Switch and Opening Message
Directly Wiring the Circuit under Measurement
Using an External PT or CT to Wire the Circuit under Measurement
Using an External Sensor to Wire the Circuit under Measurement
Selecting the Wiring System (Applies Only to the WT230)
Selecting the Measurement Mode
Selecting the Measurement Synchronization Source
Turning ON/OFF the Input Filter
Selecting the Measurement Range When Using Direct Input
Setting the Scaling Value When External PT/CT Is Used
Selecting the Measurement Range and Setting the Scaling Constant When External Sensor Is Used (Option)
Using the Averaging Function
Using the MAX Hold Function
Computing the Efficiency (Applies to WT230 Only)
Computing the Crest Factor
Performing Four Arithmetical Operation
Computing the Average Active Power During Integration
Selecting the Number of Displayed Digits and the Display Update Rate
Selecting the Crest Factor
Chapter 1 Functional Overview and Digital Display
Chapter 2 Names and Functions of Parts and Auto Range Monitor, Overrange
Chapter 3 Before Starting Measurements
Chapter 4 Setting Measurement Conditions and Measurement Range
Chapter 5 Displaying Measurement Results and Computation Results
Displaying Voltage, Current and Active Power
Displaying Apparent Power, Reactive Power and Power Factor
Displaying the Phase Angle
Displaying the Frequency
Displaying Efficiency (WT230 Only), Crest Factor, Four Arithmetic Operation Value, Average Active Power, and Peak Value
Integration
Chapter 6 Integration
Integrator Functions
Setting Integration Mode and Integration Timer
Displaying Integrated Values
Precautions Regarding Use of Integrator Function
Chapter 7 Harmonic Measurement Function (Option)
Chapter 8 Store/Recall Function of Measured/Computed Data and Setup
Chapter 9 External In/Output Function
Chapter 10 GP-IB Interface (Option)
Chapter 11 Serial Interface (Option)
Serial Interface Functions and Specifications
GP-IB Interface Functions and Specifications
Responses to Interface Messages, and Remote/Local Modes
Status Byte Format (before the IEEE 488.2 Standard)
Output Format for Measured/Computed Data, Setup Parameters, and Error Codes
Setting the Address and Mode
Setting the Output Items
Commands (before the IEEE 488.2 Standard)
Pin Arrangement and Pin Assignments of the External I/O Connector (Option)
Remote Control (Option)
D/A Output (Option)
Comparator Function (Option)
Setting the Comparator Mode (Option)
Setting the Comparator Limit Values (Option)
Comparator Display (Option)
Turning the Comparator Function ON/OFF (Option)
Outputting to an External Plotter or External Printer
Storing/Recalling Measured/Computed Data
Storing/Recalling Setup Parameters
Setting the Target Element, PLL Source and Harmonic Distortion Method
Turning ON/OFF the Harmonic Measurement Function
Setting the Harmonic Order and Displaying the Measured Harmonic Value
Serial Interface Specifications
Connecting the Interface Cable
Setting the Mode, Handshaking Method, Data Format and Baud Rate
Format and Commands of Output Data (before the IEEE488.2 Standard)
Back-Up of Setup Parameters
Initializing Setup Parameters
Performing Zero-Level Compensation
Key Lock
Commands
Before Programming
Sample Program Image
Sample Program (Initialization, Error, and Execution Functions)
Sample Program (Output of Normal Measurement Data)
Sample Program (Output of Harmonic Measurement Data)
Overview of IEEE 488.2-1992
Messages
Program Format
Symbols Used in Syntax Descriptions
Commands
Data
Responses
Synchronization with the Controller
Command List
Commands
Aoutput Group
Communicate Group
Configure Group
Display Group
Harmonics Group
Integrate Group
MATH Group
Measure Group
Recall Group
Relay Group
Sample Group
Status Group
Store Group
Common Command Group
Overview of the Status Report
Status Report
Status Byte
Standard Event Register
Extended Event Register
Output Queue and Error Queue
Before Programming
Sample Program Image
Sample Program (Initialization, Error, and Execution Functions)
Sample Program (Output of Normal Measurement Data)
Sample Program (Output of Harmonic Measurement Data)
ASCII Character Codes
Communication-Related Error Messages
Chapter 12 Initializing Setup Parameters, Zero-Level Compensation, and Key
Adjustments
Chapter 15 Maintenance and Troubleshooting
Calibration
Specifications
In Case of Malfunctioning
Error Codes and Corrective Actions
Replacing the Fuse
Recommended Replacement Parts
Chapter 16 Specifications
Input
Accuracy
Functions
Comparator Output (/CMP Option)
D/A Output (/DA4, /DA12, and /CMP Options)
External Sensor Input (/EX1 and /EX2 Options)
Remote Control Input/Output Signal (/DA4, /DA12, and /CMP Options)
GP-IB Interface (Standard on -C1, /C1 Option)
Serial (RS-232-C) Interface (Standard on -C2, /C2 Option)
General Specifications
Dimensional Drawings
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Digital Power Meter
IM 760401-01E
3rd Edition
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