Products > Test Equipment
Brymen BM037 clamp meter bug: false readings in Crest mode?
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shapirus:

--- Quote from: AdAstra on May 30, 2024, 07:44:09 pm ---Did Bryman ever get back to you on this?

--- End quote ---
No, but I have never contacted them directly.


--- Quote from: AdAstra on May 30, 2024, 07:44:09 pm ---Wanting to buy one of these but now hesitating. What distributor did you work with?

--- End quote ---
It was one of our local distributors based in Kyiv, so knowing it isn't likely to be of any use to you. They were nice and willing to help, but, alas, they couldn't do much without cooperation on the Brymen side.

Brymen may have fixed this in a later firmware, who knows. This is a nice meter in every other respect besides the mentioned issue, but I surely don't like the manufacturer's overall attitude. I have no direct reason to say one thing or the other about their customer support, it's just my impression. Lack of firmware update support, lack of (non-NDA'ed) calibration procedure info, no schematics, no sign of any involvement with general public on the internet -- nothing. If it works, it works. If it doesn't, you can get a refund -- I was offered one, but I didn't want a refund, I wanted to keep the meter and have this specific issue fixed (or at least paid attention to!), since other meters, at least several of the same batch, had this bug too. But apparently Brymen had no interest in investigating and troubleshooting this bug, so in the end I kept it as it was. I'm still using it from time to time and I still have not seen another clamp meter that I would want to buy to replace the BM037.

Either way, you could get one from a distributor that has an easy return procedure and see if the meter you receive has this bug (and then, if it does, make a hard decision on keeping it or returning it, lol). It would be interesting to know. Or, find a distributor who will agree to test the meter for this particular issue before shipping.
AdAstra:
Thanks, I emailed them directly with a link to this post, will report if I hear back.
AdAstra:
They replied with:

“After inquiring, I was told this problem was caused by improper calibration. To re-calibrate BM037 current functions is able to fix it. I was also advised that every BM037 production unit from Year 2003 needs to pass an additional production test point to check if its CREST mode was calibrated properly. Thus the unit with the S/N (manufactured number) from 231xxxxxx does not have this problem.”     

(I assume the 2003 is a typo and they mean 2023.)
shapirus:
That's nice.

Now I wonder if there's any way of obtaining a calibration procedure for my BM037... I'm even ready to honestly promise not to share the instructions if I receive them :)
AdAstra:
Try them at info@brymen.com, especially since they apparently know it was an issue.
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