Products > Test Equipment
New EEVblog BM786 Multimeter
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joeqsmith:

--- Quote from: EEVblog on August 11, 2021, 12:58:44 am ---Firmware updates for BM786.
And Brymen have confirmed that recalibration after firmware update is not required.
--- End quote ---

When I first looked at the 786/9, I was told that swapping the IC could require the meter to need realignment.  While working on the review of the 769, this came up again and they provided a little more detail, suggesting that it only effects the 789.   

I wonder if reprogramming the firmware for the 789 vs swapping the IC would still require realignment.   Shipping takes a fair bit of time.    I'm still waiting on the new 789 to arrive so we can move ahead with the review. 
EEVblog:

--- Quote from: Amaruk on August 11, 2021, 03:49:02 pm ---Thanks for the heads-up on this DMM! It looks great and it is available thru Amazon here in the US now which is great!! :-+

--- End quote ---

Just shipped 80 more units to Amazon US. Both meters sell very well on Amazon.
EEVblog:

--- Quote from: joeqsmith on August 11, 2021, 05:27:27 pm ---
--- Quote from: EEVblog on August 11, 2021, 12:58:44 am ---Firmware updates for BM786.
And Brymen have confirmed that recalibration after firmware update is not required.
--- End quote ---

When I first looked at the 786/9, I was told that swapping the IC could require the meter to need realignment.  While working on the review of the 769, this came up again and they provided a little more detail, suggesting that it only effects the 789.
--- End quote ---

You'd expect swapping the IC on all models to potentially require realignment. As the micro likely has internal ADCs for auxillary measurements that will have individual calibration factors.
EDIT: I can confirm that the micro contains a 21bit sigma-delta ADC, and I presume this is the main measurement ADC.
So yes, certainly you can't just change the micro and expect zero measurement difference.
EEVblog:
Firmware updating works:

firewalker:
Did anyone started hacking it?

Alexander.
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