Here’s the page we think you wanted. See search results instead:


Contact an Expert

Firmware update for U1271A & U1272A Handheld Digital Multimeter - Rev 2.04

Always update your handheld digital multimeters with the latest firmware to maximize the performance of the instrument.

Release Date Version Version Description
2013-07-05 2.04 Firmware (Revision 2.04)

How to Download

  • 1. Connect the multimeter to your PC via the U1173A IR-USB connectivity cable and turn on the multimeter.
    2. Go to Start > All Programs > Agilent > Agilent U1271A_U1272A Firmware Update > Agilent U1271A_U1272A Firmware Update (Version 2.04).
    3. Click “Auto Search COM Port” button to search and detect the unit. The model number, serial number and current firmware version of the multimeter will be displayed in the “Model Number”, "Serial Number" and "Current Version" field.
    5. Make sure the instrument is in connected status before you start firmware update. Click “Upload Firmware” to start firmware update.
    6. The multimeter will reset and recover itself after the firmware update.

How to Install

  • Installing the software:
    1. Unzip the zip file to a folder.
    2. Go to folder PL2303_XPVistaWin7_Driver, click on the “PL2303_XPVistaWin7Driver. Exe” to install the U1173A IR-USB cable driver.
    3. Double click the Setup.exe file to install the program.
    Uninstalling the software:
    1. Go to Start > Control Panel, then double-click Add or Remove Programs.
    2. In the Currently installed programs window, select the program that you want to remove, then click Remove.


  • Does Not Require a License

Supporting Documentation


Installs on:


Operating System

  • Windows 7
  • Windows Vista
  • Windows XP
  • Windows 2000


  • System Requirements: Intel Pentium 4, 1GHz or equivalent, 512MB RAM, 1GB HDD free space
    Required accessory: U1173A IR-USB Connectivity Cable
  • Caution:
    Ensure that the battery level is at least 1 bar before performing the firmware update.
    Do not detach the unit or interrupt the upgrade process while it is ongoing. It may cause the unit to hang or malfunction.

Supported Instruments

  • U1271A,U1272A