Always update your handheld digital multimeter 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.

Keysight recommends using the most current version, which includes the most up-to-date bug fixes and security patches available.
Release Date Version Version Description
2019-06-26 1.27 Update to fix bug – Readings intermittently dropped to zero during data logging.
Release Date Version
2019-06-26 1.27
Version Description
Update to fix bug – Readings intermittently dropped to zero during data logging.

How to Download

  1. Double click on the installer 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 C:\\ Program Files (x86) \ Keysight Technologies \ Keysight U1241C U1242C Firmware Update (Version 1.27)
  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.
  4. Make sure the instrument is in connected status before you start firmware update. Click “Upload Firmware” to start firmware update.
  5. The multimeter will reset and recover itself after the firmware update.

Licensing

  • Does Not Require a License

Supporting Documentation

Download

Installs on: Instrument

Operating System

  • Windows XP SP3
  • Windows 2000 SP4
  • Windows Vista SP2
  • Windows 7 SP1
  • Windows 10

Prerequisites

  • PL23XX_Prolific_DriverInstaller_v202  (Driver available in the zip file ).

Supported Instruments

  • U1241C, U1242C

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 U1241C U1242C Firmware Update > Keysight U1241C U1242C Firmware Update (Version 1.22).
  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.
  4. Make sure the instrument is in connected status before you start firmware update. Click “Upload Firmware” to start firmware update.
  5. The multimeter will reset and recover itself after the firmware update.
     

Licensing

  • Does Not Require a License

Supporting Documentation

Download

Installs on: Instrument

Operating System

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

Prerequisites

  • 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

  • U1241C, U1242C
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