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Brymen firmware updates and changelogs

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SMB784:

--- Quote from: joeqsmith on February 03, 2021, 11:10:34 pm ---
--- Quote from: SMB784 on February 03, 2021, 08:55:55 pm ---
--- Quote from: joeqsmith on February 03, 2021, 06:16:53 pm ---Pretty much what I said during the video.
https://youtu.be/bDIx4ik0vvA?t=502 
Then there's the realignment which I mentioned earlier. 

PA is the version that I demonstrated.

--- End quote ---

I watched the video, but I didn't see where you held down the triangle button on start to get the firmware version; perhaps I missed it, can you tell me where abouts in the video you mentioned this? I would like to get the firmware version so that when I upgrade my BM867s I know which version to ask for.

--- End quote ---

If you followed the link, I stated
--- Quote ---Now they've told me outright that basically that's a special deal and they're not going to make those controllers available to previous owners of this meter.
--- End quote ---
   Having watched it, I find it odd you would have still asked and expect to get one.   

I did not show how to get into the version menu during the video.  My previous comment  "PA is the version that I demonstrated. " was in response to your question  "Does anyone have the firmware version number for the new firmware with the longer backlight?"    Maybe you didn't understand that "PA" is the version.    :-//

--- End quote ---

There has been a misunderstanding; what I said was "I would like to get the firmware version so that when I upgrade my BM867s I know which version to ask for;" what I meant was "when I upgrade (buy a new meter), I want to know what firmware revision to ask for so that I know I am getting the unit with the extended backlight."  Sorry for the confusion.

No, I did not understand that PA was the firmware version number.  At first pass I thought that the firmware number was in P# format where # was a decimal number, but I now see from your post that it's actually in P# format where # is a hexadecimal character, in this case A (or 10 in decimal format, which makes sense since the previous version was P9).

dougg:

--- Quote from: joeqsmith on February 03, 2021, 11:21:51 pm ---
--- Quote from: dougg on February 03, 2021, 02:58:08 pm ---
--- Quote from: joeqsmith on February 02, 2021, 07:45:40 pm ---
--- Quote from: dougg on February 02, 2021, 03:52:46 pm ---...
786 question: what is the difference between Max selected under the REC button and Max selected under the Crest button? The manual takes more space telling you what is _not_ in the 786 than explaining the common functions  :-\

--- End quote ---

Odd, I thought it was pretty clear that it has to do with pulse detection time.

--- End quote ---

Thanks for the clarification. However I disagree with your characterization of "pretty clear". What was shown on the left of that image is on page 18 and what is shown on the right is on page 30 in my pdf. Only the top level sections are numbered (1 through 5) and sub-sections are unnumbered plus there are very few cross references, including on page 18 where I was left wondering "what's the difference". The "General Specification" is under the "5) Maintenance" section? All that said, it's much better than nothing  :)

--- End quote ---

It's a whopping 31 pages, nothing like War and Peace or a typical engineering text book.   :-DD  With it being electronic and searchable, for me it I can normally find what I am looking for fairly fast.

--- End quote ---

A little experimentation gave me a more satisfying answer. When the REC button is pressed it is max(Vrms), min(Vrms) and average(Vrms) running totals been displayed. All three values are >= 0. With the Crest button it is max(V) and min(V) running values being shown (i.e. as close to the _instantaneous_ voltage that the meter can record). There is no point in having a Crest value average since for AC that would be zero. For North American mains voltage I see roughly: 121, 119, 120, 171, -171 Volts respectively in the Vac range.

metaentity:
No, I think Brymen has little interest in releasing firmware updates. But maybe publishing firmware changelogs could be an incentive for user to upgrade their multimeter.

Many people have complained about the backlighting duration of the BM869s, it should be advertised more that the latest firmware has longer backlighting time.

metaentity:
Since I have the chance, I want to thank you for your videos.

Does the noise issue affect other DMMs? The BM869s?

psysc0rpi0n:

--- Quote from: dougg on February 04, 2021, 03:58:06 am ---
--- Quote from: joeqsmith on February 03, 2021, 11:21:51 pm ---
--- Quote from: dougg on February 03, 2021, 02:58:08 pm ---
--- Quote from: joeqsmith on February 02, 2021, 07:45:40 pm ---
--- Quote from: dougg on February 02, 2021, 03:52:46 pm ---...
786 question: what is the difference between Max selected under the REC button and Max selected under the Crest button? The manual takes more space telling you what is _not_ in the 786 than explaining the common functions  :-\

--- End quote ---

Odd, I thought it was pretty clear that it has to do with pulse detection time.

--- End quote ---

Thanks for the clarification. However I disagree with your characterization of "pretty clear". What was shown on the left of that image is on page 18 and what is shown on the right is on page 30 in my pdf. Only the top level sections are numbered (1 through 5) and sub-sections are unnumbered plus there are very few cross references, including on page 18 where I was left wondering "what's the difference". The "General Specification" is under the "5) Maintenance" section? All that said, it's much better than nothing  :)

--- End quote ---

It's a whopping 31 pages, nothing like War and Peace or a typical engineering text book.   :-DD  With it being electronic and searchable, for me it I can normally find what I am looking for fairly fast.

--- End quote ---

A little experimentation gave me a more satisfying answer. When the REC button is pressed it is max(Vrms), min(Vrms) and average(Vrms) running totals been displayed. All three values are >= 0. With the Crest button it is max(V) and min(V) running values being shown (i.e. as close to the _instantaneous_ voltage that the meter can record). There is no point in having a Crest value average since for AC that would be zero. For North American mains voltage I see roughly: 121, 119, 120, 171, -171 Volts respectively in the Vac range.

--- End quote ---

I have a Brymen 869s (firmware 869-P9). If I press and hold REC button during boot, I see all the chars in the display. Not any specific values. How you get those values?

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