Products > Test Equipment
Brymen BM789
<< < (80/81) > >>
J-R:
I have about 10 Brymen DMMs and about 10 Fluke DMMs.  I have taken both types apart to tinker with.  The Fluke selector switches feel superior to me, partially because they are larger and easier to grab, but also they generally just nicely and gently fall into position.  Personally, the 121GW selector switch is my favorite.

It's true that there is not really a systemic "problem" with the Brymen selector switch, but I'm not going to lie and not post my experience with the BM235!
giosif:
Thank you all for your input!
I do appreciate it.

Trying to answer some of the points raised:
1. My FW version is 10 (also shown in the video I included with my original post).
2. With regards to the occasional delay in Diode mode, again, more of a slight nuisance rather than a significant issue.
3. About battery level indicator, I should have mentioned that my voltage level measurements were done with my bench power supply powering the meter.
   So, the different voltage levels I talk about are not due to the different meter functions drawing more energy than others.
   And my main "issue" with it is more related to the reliability of the readings for those measurements which do not display the low battery indicator (while others do).
   Said differently, if I turn the meter straight to DCV measurements and I do not see a low battery indicator showing, then I want to *know* I can trust the DCV readings the meter is giving (i.e. the readings could not have been impacted by a low battery level).
   Otherwise, this can be a safety hazard, in my opinion, unless Brymen comes out states they do this intentionally (i.e. they are confident the DCV readings are reliable even below 3.7V and down to 3.58V or so).
4. With respect to the rotary switch landing between functions, maybe I've been spoiled with the likes of Gossen and Fluke, where that just doesn't happen. Not in my experience, anyway.
   I've had similar incidents with some Agilent/Keysight DMMs but, even with those, not within the first few days of using them.
   In any case, I'll try to exercise the switch for a while as with normal use (i.e. without explicitly trying to land between functions) and see if I encounter the problem again.
   Maybe it was just bad timing with the first occurrence.
mwb1100:

--- Quote from: giosif on April 25, 2023, 09:14:25 pm ---  Said differently, if I turn the meter straight to DCV measurements and I do not see a low battery indicator showing, then I want to *know* I can trust the DCV readings the meter is giving (i.e. the readings could not have been impacted by a low battery level).
   Otherwise, this can be a safety hazard, in my opinion, unless Brymen comes out states they do this intentionally (i.e. they are confident the DCV readings are reliable even below 3.7V and down to 3.58V or so).

--- End quote ---

I don't see a statement about this specific detail in the manual; in fact, I don't see any statement about low battery behavior other than the one you already pointed out: "Low Battery: Below approx. 3.7V".  So you will need to ask Brymen for such a statement if you haven't already.

Alternatively, you could experiment with reading known values at low battery levels to see if readings go bad before the meter dies (my hope would be that readings remain correct even when the low battery symbol is displayed until the meter actually powers off due to low battery voltage).
giosif:

--- Quote from: mwb1100 on April 25, 2023, 10:05:51 pm ---I don't see a statement about this specific detail in the manual; in fact, I don't see any statement about low battery behavior other than the one you already pointed out: "Low Battery: Below approx. 3.7V".  So you will need to ask Brymen for such a statement if you haven't already.

--- End quote ---

I've asked Brymen and the short version of their response is this behaviour is as intended.
I suggested they document this in the manual, so people know it's not a defect.
Antrus:
Hi everyone. My bm789 stopped measuring temperature. Can anyone post the contents of 24cs04 on the board with the buttons? The calibration is stored there.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod