- Go to Start > All Programs > Keysight Technologies > Keysight U1253B Firmware Update > Keysight U1253B Firmware Update Software (Version 3.04).

- 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.

- Make sure the instrument is in connected status before you start firmware update. Click “Upload Firmware” to start firmware update.

- The multimeter will reset and recover itself after the firmware update.

About Device Firmware:

Applying a newer firmware version than the one already installed on your unit can bring various enhancements, include workarounds for diverse problems encountered by the device, and improve or add newly developed features.

On the other hand, downgrading the firmware version can recover the device’s functionality in the event of a software update either turning up faulty or causing the unit’s overall performance to drop. However, bear in mind that applying an older firmware isn’t recommended and might not always be possible.

When it comes to the update steps, due to the large variety of devices and numerous ways for installing a new firmware, it is recommended that you carefully read and understand the upgrade steps, and consider applying a different firmware only when you have familiarized yourself with the update method.

As the installation process is most of the times quite risky, this step should be taken by users that have the ability to successfully complete the update; regular users may initiate it at their own risk. Moreover, it’s best ...