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IM WT310E-01EN
Thank you for purchasing the WT310E, WT310EH, WT332E, or WT333E Digital Power Meter. This instrument 
is a power measurement instrument that can measure parameters such as voltage, current, and power.
This User’s Manual explains the features of this instrument and how to use them. To ensure correct 
use, please read this manual thoroughly before beginning operation.
Keep this manual in a safe place for quick reference in the event that a question arises.
List of Manuals
The following manuals, including this one, are provided as manuals for this instrument. Please read all manuals.
Manual Title Manual No. Description
WT310E/WT310EH/WT332E/WT333E 
Digital Power Meter User’s Manual
IM WT310E-01EN This manual. The manual explains all features of this 
instrument, except for the communication interface 
features, and how to use them.
WT310E/WT310EH/WT332E/WT333E 
Digital Power Meter Getting Started 
Guide
IM WT310E-02EN Provided as a printed manual. This manual explains 
the handling precautions and basic operations of this 
instrument and provides an overview of its features.
WT310E/WT310EH/WT332E/WT333E 
Digital Power Meter Communication 
Interface User’s Manual
IM WT310E-17EN This manual explains the communication interface 
features of this instrument and how to use them.
WT310E/WT310EH/WT332E/WT333E 
Digital Power Meter
IM WT310E-92Z1 Document for China
PDF files of all the manuals above are included in the accompanying CD.
The “EN” and “Z1” in the manual numbers are the language codes.
Contact information of Yokogawa offices worldwide is provided on the following sheet.
Document No. Description
PIM 113-01Z2 List of worldwide contacts
Notes
• Thecontentsofthismanualaresubjecttochangewithoutpriornoticeasaresultofcontinuing
improvements to the instrument’s performance and functionality. The figures given in this manual 
may differ from those that actually appear on your screen.
• Everyefforthasbeenmadeinthepreparationofthismanualtoensuretheaccuracyofitscontents.However,
should you have any questions or find any errors, please contact your nearest YOKOGAWA dealer.
• Copyingorreproducingalloranypartofthecontentsofthismanualwithoutthepermissionof
YOKOGAWA is strictly prohibited.
• SafetyprecautionsareprovidedintheGettingStartedGuide,IMWT310E-02EN.Besureto
observe the safety precautions.
• TheTCP/IPsoftwareofthisproductandthedocumentsconcerningithavebeendeveloped/created
byYOKOGAWAbasedontheBSDNetworkingSoftware,Release1thathasbeenlicensedfrom
theRegentsoftheUniversityofCalifornia.
Trademarks
• Microsoft,InternetExplorer,MS-DOS,Windows,WindowsVista,Windows7,Windows8,and
Windows8.1areeitherregisteredtrademarksortrademarksofMicrosoftCorporationintheUnited
States and/or other countries.
• AdobeandAcrobatareeitherregisteredtrademarksortrademarksofAdobeSystemsIncorporated.
• ModbusisaregisteredtrademarkofAEGSchneider.
• Inthismanual,the® and TM symbols do not accompany their respective registered trademark or 
trademark names.
• Othercompanyandproductnamesareregisteredtrademarksortrademarksoftheirrespectiveholders.
Revisions
• September2015 1stEdition
• October2017 2ndEdition
2nd Edition: October 2017 (YMI)
AllRightsReserved,Copyright©2015YokogawaTest&MeasurementCorporation