TR75A Firmware Update Tool

This is an update program for the TR75A firmware.


This is an update program for the TR75A firmware.

Compatible ProductsTR75A
VersionVer. 1.03 (August 30, 2022)
File Nameapp-tr75a-firm-103-eng.exe
File Size8.01 MB
Operating EnvironmentCompatible OS  *1
Microsoft Windows 11 64bit English
Microsoft Windows 10 32/64bit English
CopyrightT&D Corporation
ReplicationCopying to another media is expressly forbidden
*1: For installation, it is necessary to have Administrator (Computer Administrator) rights.

How to Check your TR75A Firmware Version

T&D WebStorage Service

  1. From the [Devices] menu, open the settings window by clicking the [Settings] button for the desired device.
  2. Read off the "Firmware" version next to the "Serial Number" located at the top of the window.


  1. Open T&D software "TR7 for Windows" and connect your device via USB to the computer.
  2. Read off the "Firmware Version" value located at the lower left on the screen.

Firmware Update Procedure

  • All recorded data will be deleted by updating the firmware. Please make sure to download all necessary data before update.
  • The firmware update requires a USB connection between a device and a PC.

Before connecting a USB cable, make sure that the PC has the USB device driver installed. (By installing the application "TR7 for Windows", the USB device driver will also be installed.)

  1. Connect the device via USB to the computer.
  2. Open the downloaded "TR75A Firmware Update Tool".
  3. Follow the instructions on the screen to update the firmware.

If the update completes successfully, the new firmware version will be displayed as AXXX (XXX represents the version number) at the bottom of the LCD screen when the power is turned on.

Revision History

Ver. 1.03August 30, 2022

  • Fixed a problem where the time of the first data could be recorded incorrectly in the following situation: You start the recording after changing the recording interval with the buttons on the logger, and keep pressing the REC/STOP button after the REC icon appears on the LCD.

Ver. 1.02June 27, 2022

  • Fixed a problem that occurred when setting the device clock to "Synchronize with SNTP Server", where the synchronization failed in rare cases and caused incorrect timestamp calculations.
    See here for details.

Ver. 1.01 March 14, 2022

  • Changed the message to be displayed on the LCD when the battery voltage is low from [dEAd bAtt] to [Lo bAtt].
  • When passcode lock is enabled and you enter the wrong passcode three times in a row, the lock cannot be disabled for one minute now.

User Agreement


  1. Although T&D Corporation has carried out operational tests on T&D Graph, hereafter referred to as "the software", we cannot guarantee that all operations will work properly under all conditions.
  2. T&D Corporation shall not accept any responsibility for any damage whether direct or indirect that results from the usage of the software.
  3. Specifications of the software may be subject to change and service may be terminated without advance notice to the user. In such a case T&D Corporation shall not be responsible for any damages whether direct or indirect from the inability to use the software.
  4. T&D Corporation has no obligation to correct any defects found in the software.


  1. All copyrights for the software, including all of the programs and all related documents, are the sole property of T&D Corporation.
  2. The software is for use free of charge. Redistribution is permitted as long as it is to others for non-profit. In this case, all terms and conditions as written in the above disclaimers automatically transfer and hold true and valid for the party to which the program was redistributed. Please note that if you wish to commercially redistribute the program please contact your local distributor or T&D representative.
  3. The reprinting or redistribution for commercial purposes whether in part or in whole, in magazines or as a part of any product is strictly forbidden without the expressed consent of T&D Corporation. Any inquiries concerning commercial redistribution should be directed to the Sales Department of T&D Corporation.
  4. Please do not attempt to make any changes or modifications to the software.
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