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U1281A/U1282A Firmware Update

Always update your handheld digital multiemeter with the latest firmware to maximize the performance of the instrument. Please follow all the instructions below step-by-step to ensure the firmware installation is successful.

Release Date Version Version Description
2017-01-19 1.05 Disable DC Filter during measurement at ACmv mode.

How to Download

  1. Unzip the zip file to a folder.
  2. Go to folder PL2303_XPVistaWin7_Driver, click on the PL2303_XPVistaWin7Driver. Exe to install the U1173B IR-USB cable driver.
  3. Double click the Setup.exe file to install the program.

How to Install

  1. Connect the multimeter to your PC via the U1173B IR-USB connectivity cable and turn on the multimeter.
  2. Go to Start > All Programs > Keysight Technologies > Keysight U1281A U1282A Firmware Update > Keysight U1281A U1282A Firmware Update (Version 1.05).
  3. Click


  • Does Not Require a License

Supporting Documentation


Installs on:


Operating System

  • Windows XP SP3
  • Windows 7 SP1
  • Windows Vista SP2
  • Windows 2000 SP4


  • System Requirements: Intel Pentium 4, 1GHz or equivalent, 512MB RAM, 1GB HDD free space
    Operating Systems: Windows 2000 SP4, Windows XP SP3, Windows Vista SP2, Windows 7 SP1
    Required accessory: U1173B IR-USB Connectivity Cable

Supported Instruments

  • U1281A, U1282A