WTViewerEfree Software


The WTViewerEfree software can capture measured numeric values, harmonic values, and waveform data. The data can be transferred to a PC via a USB, GP-IB/RS-232 or Ethernet communication interface, and it can be displayed and saved onto the PC. (WT5000/ WT3000E/ WT3000/ WT1800E/ WT1800/ WT500/ WT300E/ WT300)

Applicable Model

WT310, WT310E, WT310HC, WT310EH, WT332, WT333, WT332E, WT333E, WT500, WT1800, WT1801, WT1802, WT1803, WT1804, WT1805, WT1806, WT1801E, WT1802E, WT1803E, WT1804E, WT1805E, WT1806E, WT3000, WT3001E, WT3002E, WT3003E, WT3004E, WT5000

Revision History

Version Release Date Content
1.51 Jul 3, 2020
  • Improved the management method of measurement data files.
1.42 Jun. 4, 2019
  • Added support for WT5000.
1.41 Nov. 22, 2018
  • Changes according to release of WTViewerE ver 1.42.
1.33 Apr 6, 2018
  • Added following languages to the supported language.
    Simplified Chinese, German, Italian, Korean, Russian, Spanish, French, Hungarian
  • Supports to connect between different models.
  • Supports standard user login and using application.
1.21 Oct 6, 2016
  • Added support for WT1800E.
1.11 Apr 11, 2016
  • Added support for WT1800.
    * Firmware Ver. 2.31 or later is required for WT1800.
1.01 Jul 15, 2015
  • New release.


* If there is a previous USB driver, YKMUSB in your PC, please uninstall the driver before this installation.
WT3000 firmware needs to be upgraded to Ver. 6.11, and it requires to dedicated advance mode setting.
* Firmware Ver. 2.31 or later is required for WT1800.



Please read Software Agreement carefully before downloading.


Version 1.51
Release Date Jul 3, 2020
File Name wtviewerefree151.zip 226 MB


Type Software* Registration is required to download.


* Software Agreement
  • The property rights, proprietary rights, intellectual property rights, and all other rights associated with the software are held by Yokogawa Electric Corporation.
  • Under no circumstances is any dumping, reverse compiling, reverse assembly, reverse engineering, or any other kind of alteration or revision of this software allowed.
  • This software is offered free of charge, but no unlimited warranties are made against any defects whatsoever.
  • Also, Yokogawa may not be able to accept inquiries regarding repair of defects in or questions about this software.
  • The contents of this software are subject to change without prior notice as a result of continuing improvements to the software\'s performance and functions.
  • Yokogawa bears no liability for any problems that may occur during download or installation of this software.
  • Use of the Yokogawa Web site is at the user\'s own risk.
  • Any parties contributing to the creation or distribution of the contents on the Yokogawa Web site shall bear no responsibility whatsoever for any damages occurring as a result of the use of said contents.

Downloading of the software indicates acceptance of the software agreement.

Related Products & Solutions

WTViewerEfree Software

The WTViewerEfree is free software for power analyzer models that include WT series*. The software simplifies instrument configuration and gathering of measurements.

*WT5000/ WT3000E/ WT3000/ WT1800E/ WT1800/ WT500/ WT300E/ WT300