xvii
IM WT310E-02EN
2.2Attach 
 to 2.2, 2.3, 2.5, 2.9, 2.10, 2.11 and 5.1
1
2
3
4
5
6
7
App
Contents
Checking the Contents of the Package.............................................................................................ii
Safety Precautions .......................................................................................................................... vii
Regulations and Sales in Each Country or Region ........................................................................ xiii
Symbols and Notation Used in This Manual .................................................................................. xiv
Workflow ........................................................................................................................................ xvi
Chapter 1  Component Names and Functions
1.1  Front Panel, Rear Panel, and Top Panel .......................................................................... 1-1
1.2  Displayed Items ................................................................................................................ 1-5
1.3  Digital Numbers and Characters ...................................................................................... 1-7
1.4 Keys ................................................................................................................................. 1-8
1.5  Auto Range, Overrange, and Error Indications During Measurement ............................ 1-12
1.6  System Configuration ..................................................................................................... 1-14
Chapter 2  Making Preparations for Measurements
2.1  Handling Precautions ....................................................................................................... 2-1
 2.2  Installing the Instrument ................................................................................................... 2-3
 2.3  Connecting the Power Supply .......................................................................................... 2-7
2.4  Turning the Power Switch On and Off .............................................................................. 2-9
 2.5  Precautions When Wiring the Circuit under Measurement .............................................2-11
2.6  Assembling the Adapters for the Voltage Input Terminals .............................................. 2-17
2.7  Wiring for Accurately Measuring a Single-phase Device ................................................ 2-19
2.8  Guide for Selecting the Method Used to Measure the Power ........................................ 2-20
 2.9  Wiring the Circuit under Measurement for Direct Input .................................................. 2-21
 2.10  Wiring the Circuit under Measurement When Using Current Sensors ........................... 2-38
 2.11  Wiring the Circuit under Measurement When Using a Voltage or Current Transformer.... 2-45
2.12  Connecting to a PC via USB (Installing WTViewerFreePlus) ......................................... 2-52
Chapter 3  Common Operations
3.1  Key Operation and Functions ........................................................................................... 3-1
3.2  Entering Values ................................................................................................................ 3-3
3.3  Initializing the Settings ...................................................................................................... 3-4
Chapter 4  Operating this instrument
4.1  Setting the Measurement Ranges .................................................................................... 4-1
4.2  Configuring the Wiring System Settings (Only on the WT332E/WT333E) ....................... 4-4
4.3  Displaying the Voltage, Current, and Active Power on the WT310E/WT310EH .............. 4-5
4.4  Displaying Voltages, Currents, and Active Powers on the WT332E/WT333E .................. 4-6
Chapter 5  External I/0 (Option)
 5.1  External I/O Connector Pin Arrangement and Pinout ....................................................... 5-1
5.2  Controlling This Instrument Remotely .............................................................................. 5-4
5.3  Producing D/A Output ....................................................................................................... 5-5