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| BM789 continuity behaviour |
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| Electro Fan:
--- Quote from: NoisyBoy on September 06, 2023, 03:57:08 am ---No issue with 786. I wonder if it is firmware version related. Not that it matters since Bremen will not provide end user firmware upgrade. But at least it may help for those who are shopping for a used 789 if it is firmware related. --- End quote --- 78905 versions should command a higher price in the resale market for users seeking occasionally extra high sensitivity. |
| mwb1100:
BM786 firmware 78608 doesn't show this issue. |
| sonpul:
--- Quote ---Or it does, and you just learned to accept it? --- End quote --- I usually focus, start work and finish. The call is used for troubleshooting, partial reverse engineering, checking your work, etc. It doesn't seem to interfere at all. Otherwise, I would not have bought a second exactly the same. On my devices 78911 firmware. I can observe such a feature on them. As a rule, if I pay attention to this, then the very first touch to the board of one of the probes, for the whole day or the ringing cycle, may be. Or the devices do their job immediately without a short beep. |
| Veteran68:
--- Quote from: Electro Fan on September 03, 2023, 10:17:09 pm ---OK, this thread has me testing more. Mine does the same as Caliaxy describes: random very short beeps when touching metal parts of various equipment with only one probe (the other probe in the air). Looks like some static charge pick-up - touching repeatedly the same metal part does not result in multiple beeps; you have to wait a bit or touch something else before being rewarded with a new beep. I can reproduce this ^ . --- End quote --- I can reproduce this as well with my eevBlog BM786 (FW 78607). I just touched the red probe to a metal shelving unit while holding the black probe in the air, and it beeped once. Touched it again and nothing. Then touched it to a heatsink on a PCB on my bench maybe 2 seconds later, and it beeped once again. Pretty sure I've seen this before with other meters besides the Brymen. In fact I watch a LOT of YouTube repair videos and am sure I've seen meters beep once like that on first contact, and they weren't Brymen meters either. However I just tried with a couple of my other meters at hand -- a Fluke 117 and a Brymen BM869s -- and couldn't reproduce it. I have a lot of other meters that I may try here and there. I hadn't really thought of it as a problem and it's never caused me any concerns. I chalked it up as some kind of capacitance behavior or something but never noticed before that it would also happen with one probe in the air. EDIT: Added firmware version |
| LuisBe:
Hello everybody again, sorry for the delay but my holidays are over and I can't play with multimeters for so long. I would like to say that I really like the BM789, its size, its construction, its functions and simply in this thread we talk about small details and let the community know about them without bad faith. About the short beep when touching the chassis of my equipment, I have seen that my installation must not be right and some of my equipment must introduce some kind of noise in my ground and I think that makes my multimeter behave like that. https://youtube.com/shorts/v3YMqNoi91U?feature=shared About the short continuity beep on a Chinese Arduino board, it strikes me that my BM235 doesn't behave like that. Maybe it is because the BM789 is much more sensitive so the continuity function is better on bigger boards than a small Arduino board. My firmware version is 78912, you will see in the video after displaying it, it turns off (I don't know if it's normal operation but I think it's not a problem). https://youtube.com/shorts/BC1WUbZbf5E?feature=shared Greetings to all. LuisB |
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