Products > Test Equipment
Brymen BM789
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joeqsmith:

--- Quote from: AVGresponding on August 14, 2022, 05:20:59 pm ---Really? I can understand the buyer being too dumb to understand what they are doing (if it's as you describe), but surely the seller should have some basic level of knowledge of the products they are supplying..? I would refuse a return on this basis anyway.

--- End quote ---
Thank you for asking.  We are talking the WWW and there can certainly be differences in language, culture, education and our friendly trolls from time to time.  Lots of dynamics and you may interpret the discussion differently.   I welcome the input. 
floobydust:

--- Quote from: EEVblog on August 14, 2022, 10:37:48 am ---[...] Every single Brymen meter ever made before this 78x series (and many other brands including the biggies like Fluke) do not allow firmware updating, so you are stuck with the version you bought.
There is no manufacturer or dealer re-programming service offered.

--- End quote ---

I think Brymen needs to acknowledge the need to update the firmware in their multimeters. With feature sets now this complicated, updates are to be expected, the days of OTP are thankfully gone. There's not a lot of secret sauce in the firmware and supposedly they have custom silicon as well.
If Brymen is scared then let authorized dealers or a repair depot do it. Oh wait there's none in North America.

Fluke had top quality firmware, it was tested thoroughly, there is no comparison in that regard.
AVGresponding:

--- Quote from: joeqsmith on August 14, 2022, 06:06:00 pm ---
--- Quote from: AVGresponding on August 14, 2022, 05:20:59 pm ---Really? I can understand the buyer being too dumb to understand what they are doing (if it's as you describe), but surely the seller should have some basic level of knowledge of the products they are supplying..? I would refuse a return on this basis anyway.

--- End quote ---
Thank you for asking.  We are talking the WWW and there can certainly be differences in language, culture, education and our friendly trolls from time to time.  Lots of dynamics and you may interpret the discussion differently.   I welcome the input.

--- End quote ---

I see. Looks like you are doing your best to explain to someone with zero knowledge why battery voltage drops when loaded, and then recovers once the load is removed... I wish you luck!
AVGresponding:

--- Quote from: floobydust on August 14, 2022, 07:02:44 pm ---
--- Quote from: EEVblog on August 14, 2022, 10:37:48 am ---[...] Every single Brymen meter ever made before this 78x series (and many other brands including the biggies like Fluke) do not allow firmware updating, so you are stuck with the version you bought.
There is no manufacturer or dealer re-programming service offered.

--- End quote ---

I think Brymen needs to acknowledge the need to update the firmware in their multimeters. With feature sets now this complicated, updates are to be expected, the days of OTP are thankfully gone. There's not a lot of secret sauce in the firmware and supposedly they have custom silicon as well.
If Brymen is scared then let authorized dealers or a repair depot do it. Oh wait there's none in North America.

Fluke had top quality firmware, it was tested thoroughly, there is no comparison in that regard.

--- End quote ---

Maybe just wishful thinking, but I'd prefer a meter that works straight away, and not one that might work 7 firmware patches and 2 years down the line. Much of the time the issues Joe and others uncover are really not edge cases and should really be picked up at the R&D stage. This is not an issue exclusive to Brymen, either. The Fluke 87V has a firmware fault, that afaik exists even today, and has been explored on this forum. It's not a serious one, but it exists nevertheless.

I'd also worry that a used meter purchased off ebay or wherever, might have non-manufacturer firmware that may even cause safety issues, and I expect the manufacturers have similar concerns, as well as wanting to protect their IP of course.
NoMoreMagicSmoke:

--- Quote from: floobydust on August 14, 2022, 07:02:44 pm ---Fluke had top quality firmware, it was tested thoroughly, there is no comparison in that regard.

--- End quote ---

I am not sure this is really a fair statement. Fluke is not immune to rare firmware bugs and has had some themselves (87V GSM bug???). There have been a number of reviewers and this meter has been out for a couple of years now before this issue was found. I have a BM789 with firmware version 08 and I attempted to reproduce this and I could not with my meter. This means that either this issue does not affect all BM789 meters, or it is an extremely narrow scoped issue.

I guarantee that anything with software has edge case bugs that if you search for long enough can be uncovered. The fact that someone can find an obscure bug does not mean that the product is inferior. The company's response though does separate the good from the bad.
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