CW500 Power Quality Analyzer

How to check the current Body version.

firmware version is displayed in the lower right of the screen that appears when you start the CW500.

Revision History

Version Release Date Content
1.02 Jan 24,2020
  • Improved Time period recording.
  • Sensor detection problems in quick start guide have been solved.
  • Defect fixed that causes incorrect event detection at inrush current measurements.
  • Defect fixed that causes incorrect wave data display when a transient event occurs.
  • In the language environments other than Japanese,the problem that the threshold values for power quality event after system reset don’t correspond to nominal voltages was solved.



Please read Software Agreement carefully before downloading.


Version 1.02
Release Date Jan 24,2020
File Name 3.44 MB


Type Firmware* 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 Test & Measurement 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.
  • Note that you must agree to the contents of “Software License” for the software that encloses or displays the “Software License” as the conditions of use.
  • This software product may contain open source software (hereafter referred to as OSS). License terms appropriate for each OSS component are applicable in place of the terms of this license. If there is a discrepancy between the terms of the OSS license and the terms of this license, the license terms of the corresponding OSS take precedence.

Downloading of the software indicates acceptance of the software agreement.

Related Products & Solutions

CW500 - Power Quality Analyzer

The Yokogawa CW500 is a portable power analyzer that logs transient power phenomena in addition to measuring single to three phase power.