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FieldFox Current Firmware (New CPU)

To upgrade firmware:

  1. Power on the FieldFox
  2. To view the current installed firmware in FieldFox
    • Press System (7), press Service Diagnostics, press System Information
  3. The Current Version tab at the bottom of this page provides a link to download the latest firmware
  4. Follow the appropriate Update Instructions from the table below
Current Firmware Revision Updated Firmware Revision Update Instructions


A.11.78 (All other FieldFox Models)

Back up all user state files before performing firmware update


External Reference Unlock Error Message does not appear under certain conditions



** Implementation of time/date restriction setting on FieldFox. Please set local time correctly before updating from previous revisions.

Updating within A.09.xx

NOTE: Firmware upgrades do not affect the measurement accuracy of a FieldFox instrument. An annual calibration of a FieldFox remains valid following a firmware upgrade. 

For more information and guidance on which upgrade is right for you refer to the Upgrade Brochure

Click here to view significant firmware history changes

Release Date Version Version Description
2020-07-10 A.11.78 See Release Notes for Details

How to Download

  • Click the download button, select file and save.

How to Install

  • NOTE! Please backup all user state files to computer or USB flash drive before updating to latest firmware revision.
  • See firmware update supporting documentation for installation process.


  • Does Not Require a License

Supporting Documentation


Installs on:



  • Information Not Available

Supported Instruments

  • N991xA, N992xA, N993xA, B Models N995xA, N996xA analyzers with CPU2