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New EEVblog BM786 Multimeter

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EEVblog:

--- Quote from: joeqsmith on January 16, 2021, 04:52:40 pm ---
--- Quote from: Roger Need on January 15, 2021, 09:02:10 pm ---Here is a photo with the battery holder removed.  Are the pins shown for flashing firmware??

Roger

--- End quote ---

I was guessing that connector allowed them to perform the alignment semi-automatically.  There appears to be two other unpopulated connectors which I was guessing were for development and not needed once they got into production.   During my evaluation, any changes the to firmware required that I change ICs.   

--- End quote ---

I have been told that "Firmware update will need Custom-made Programmer."
And I think way back they inidcated it was a re-programmable part as opposed to previous models that use OTP processors.

As for firmware changes, the BM235 had several firmware changes over 3-4 years as users slowly found obscure issues.
Just look at the ohm ranging issue with the BM867 recently, a once previously solidly tested meter.
So I'd be surprised if we don't see some firmware changes over the next few years.

EEVblog:

--- Quote from: joeqsmith on January 16, 2021, 11:51:21 pm ---
--- Quote from: rsjsouza on January 16, 2021, 08:43:11 pm ---
--- Quote from: joeqsmith on January 16, 2021, 08:19:00 pm ---While Dave's UEI meter still has some firmware problems noted with the prototype back in 2017,  the Brymen BM786 even though it's a brand new product, is much more mature (not to mention the quality of the parts and design).   The UEI meter needed that crutch.  I don't see that being the case with most high quality meters. 

--- End quote ---
UEI's core business is not on multimeters, but Brymen's is. For them it is make it or break it. For UEI, it is another department.

IIRC, shortly before the release of the 121GW UEI had discontinued their entire range of DMMs. Nowadays I see four models, all 4000/6000 counts clearly for industrial markets.

--- End quote ---
I had tried to buy a few new UEI meters once Dave announced they were going to produce his meter.  They were already out of the business by that time which is why you never saw me run one.

--- End quote ---

Actually not true. They have been selling into the Chinese market under the Kane brand.
http://www.kanetest.com.cn/category.php?id=33
And there is a new model coming our in that 500 series, it's an upgraded design based on the 121GW design, but new much bigger case for a tripple display much like the original concep 121GW proposed right at the start, and I believe new firmware.
I have partly shown this in a previous video, it's probably not far from release.

joeqsmith:

--- Quote from: EEVblog on January 17, 2021, 01:24:05 am ---
--- Quote from: joeqsmith on January 16, 2021, 04:52:40 pm ---
--- Quote from: Roger Need on January 15, 2021, 09:02:10 pm ---Here is a photo with the battery holder removed.  Are the pins shown for flashing firmware??

Roger

--- End quote ---

I was guessing that connector allowed them to perform the alignment semi-automatically.  There appears to be two other unpopulated connectors which I was guessing were for development and not needed once they got into production.   During my evaluation, any changes the to firmware required that I change ICs.   

--- End quote ---

I have been told that "Firmware update will need Custom-made Programmer."
And I think way back they inidcated it was a re-programmable part as opposed to previous models that use OTP processors.

As for firmware changes, the BM235 had several firmware changes over 3-4 years as users slowly found obscure issues.
Just look at the ohm ranging issue with the BM867 recently, a once previously solidly tested meter.
So I'd be surprised if we don't see some firmware changes over the next few years.

--- End quote ---

Interesting about the programmer.  I have not looked into it beyond what I posted today. 

I bought the BM235 late and missed out on all the fun Scott was having with it finding early problems.  Outside of the cut away area around the connector for added clearance, the one I have seems fine for the most part.  I mentioned the autorange problem with it.   The BM869s has a similar problem but it's not anything that has hindered me. 

I've up'ed my game since looking at the very first handheld, even since looking at the BM235.   The benefit to the BM786 is that we find more problems early on and we have a company who not only wants to correct them but is also capable of doing so. 

After experiencing the 121GW, I have adopted the old adage of fool me once ....   I don't care if it's sold under UEI, Kane or Finest. 

ian.ameline:
Are the calibration procedures documented for this meter?

joeqsmith:

--- Quote from: ian.ameline on January 17, 2021, 09:25:41 pm ---Are the calibration procedures documented for this meter?

--- End quote ---
I assume you are asking about how to align the meter.   I'm sure Brymen has these procedures documented along with everything else about the design.   It's not available to the general public that I am aware of.

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