Products > Test Equipment

New EEVblog BM786 Multimeter

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Roger Need:

--- Quote from: NY2KW on January 16, 2021, 02:49:47 pm ---How fast is the Autorange?

--- End quote ---

I suggest you take a look at joeqsmith's excellent Youtube videos on the latest firmware with autoranging.



Roger

rsjsouza:

--- 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 ---
Despite they asked you to switch ICs, this may be due simply to the fact the devices have their JTAG port cut off to protect the Flash contents against prying eyes. This may still be used for flash programming (and perhaps some basic testing) during production.

joeqsmith:

--- Quote from: rsjsouza on January 16, 2021, 07:33:00 pm ---
--- 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 ---
Despite they asked you to switch ICs, this may be due simply to the fact the devices have their JTAG port cut off to protect the Flash contents against prying eyes. This may still be used for flash programming (and perhaps some basic testing) during production.

--- End quote ---

It's possible.  I didn't ask.  I did however offer to program them to avoid the shipping times and speed up our progress.   We may have saved a few weeks.  Then again, getting everything setup and working may have been more trouble than it was worth.  Not a big deal one way or the other.   It's not the 121GW.  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. 

My tests certainly are not the end all of tests but I am interested to see what problems early buyers find.  It may point to the need to improve or add to my own tests. 

rsjsouza:

--- 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.

joeqsmith:

--- 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. 

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