Products > Test Equipment
BM869S not reading correct voltage
LDDM:
Sorry :palm: i forgot one picture (please see update to my previous post, Meter_16)
Fungus:
--- Quote from: coromonadalix on July 12, 2024, 12:23:18 pm ---yeah but see my link on my post we see only 2 contacts
https://lygte-info.dk/review/DMMBrymen%20BM869s%20UK.html
--- End quote ---
Here, too...
https://www.eevblog.com/forum/testgear/brymen-bm-867-teardown-pictures/msg156229/#msg156229
But that makes no sense to me. :-// :-/O :wtf:
LDDM:
I just found this post from 2022 of someone having (I think) the same issue.
https://www.eevblog.com/forum/testgear/brymen-bm869s-suddenly-weird-behaviour/
Similar thing here. It seems to be more common than I thought...
https://www.eevblog.com/forum/testgear/brymen-bm869s-stopped-measuring-ac-volts/25/
Port from 2018 with similar problems:
https://www.eevblog.com/forum/repair/brymen-bm869s-ol-problem-with-ac-measument/msg1918175/#msg1918175
joeqsmith:
Sadly as you have seen, seldom people who post about their problems ever provide a conclusion.
I live near fresh water and it's not a problem like other parts of the USA. I've never had to consider conformal coating. Do you have to store your electronics in special containers or is not a problem where you live? Is the humidity always high enough that ESD isn't a concern?
J-R:
The BM869s is actually pretty well sealed. There are gaskets/o-rings around the battery cover and the banana jacks, even the screw heads. So I don't think humidity would impact it.
But you could still fully inspect the PCB under a microscope looking for any solder issues or corrosion, clean selector switch and jack contacts.
A side note is that each jack's BeepJack feature does not function if their respective fuse is blown, so double-check those.
What 9V batteries are you using?
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