Fluke 8846A Lithium Battery Replacement - cal data affected?

[KJ-90]

In the Fluke 8846A DMM, there is a lithium coin cell on the main circuit board. I have read this is for powering the unit's clock and calendar functions. However, does it also affect the calibration data retention as well? As we know, most closed-case calibrated equipment stores the cal data in NVRAM, so no battery power is needed. But, is it safe to change the cell if needed, or is this only a Fluke service center task? Any ideas on what to do when the battery needs replacing? 

[Awesome14]

The service manual for the 8846A is called the 'calibration' manual. It doesn't mention the button cell. But page 1-7 of the user manual mentions that calibration constants are stored in non-volatile memory.

[macboy]

The service manual for the 8846A is called the 'calibration' manual. It doesn't mention the button cell. But page 1-7 of the user manual mentions that calibration constants are stored in non-volatile memory.

'Non-volatile" definitely can mean battery-backed RAM.

If you are confident in your ability to not hurt yourself doing it, you could consider changing the battery with the power on. I don't recommend it though.