About ST5520 upgrade

V2.04 May 28, 2021

If you are unable to download software, please check the following:
  • Please register a my HIOKI account and then use it to log in to the my HIOKI service.
  • Product firmware (product upgrades) and computer application software can only be downloaded for products you have registered on the my HIOKI service.
Software (ST5520V204_en.zip)
Version upgrade procedure manual (ST5520Vup2_en_00.pdf)

○ Latest software is posted. Keep the instruction manual up-to-date.
○ Do not perform the following operations during the upgrade. Repair is required.
・ Turn off the main unit.
・ Unplug the USB cable.

Version Upgrade History

V2.04 (Dec. 2019)
Fixed a bug in V2.03.
[Bug Description]
The measurement result may becme out of the accuracy when measuring the device around lower display range limit by the 890V or higher test voltage.
[Countermeasures]
The firmware is updated to V2.04 which has the same lower limits for the resistance display and assured accuracy ranges of V2.02.  The upper limit is not changed.