Brymen BM235 Multimeter Display Lag/Pause - Page 1
Forum section: electronics / testgear

author: Sebekh
author_rank: Newbie
timestamp: March 19, 2025, 07:59:13 pm
content: helloi have bm235 and it's about refreshing the measurement it seems to me that every now and then it hangs I recorded a movie of it. how is IT with yours bm235?. And how is it in the new bm2257?https://youtu.be/xk-1BdoiZcs?feature=shared

author: EEVblog
author_rank: Unknown
timestamp: March 19, 2025, 10:44:22 pm
content: Quote from: Sebekh on March 19, 2025, 07:59:13 pmI don't see any "hanging"?

author: mwb1100
author_rank: Frequent Contributor
timestamp: March 19, 2025, 10:52:25 pm
content: Quote from: EEVblog on March 19, 2025, 10:44:22 pmEvery now and again it pauses updates for a second or two - it doesn't hang in the usual sense of "stops working". Likely not a native English speaker so the nuance gets lost.

author: EEVblog
author_rank: Unknown
timestamp: March 19, 2025, 11:21:41 pm
content: Confirmed. Doesn't happen on the BM2257, and it also does it on the original old firmware and the latest firmware.Looks like a rolling average every 10 counts.

author: MaxPi
author_rank: Newbie
timestamp: March 20, 2025, 05:55:29 am
content: BM869S (869-PA) also has small frizes

author: Furna
author_rank: Frequent Contributor
timestamp: March 20, 2025, 06:09:29 am
content: Quote from: MaxPi on March 20, 2025, 05:55:29 amI was going to ask for a test with different Brymen meters ... you were faster and tested exactly the meter I was curious about. What firmware version?Did you use the same test metodology as Dave (function generator ramping up)?

author: Sebekh
author_rank: Newbie
timestamp: March 20, 2025, 09:21:47 am
content: thanks Dave that's what I meant, about the lag. in uni-t it's smooth or in bm875s. thanks for the test.another user's videohttps://youtube.com/shorts/V_u-rFpcfp4?feature=shared

author: FiveFiveFive
author_rank: Contributor
timestamp: March 20, 2025, 12:10:58 pm
content: For what it's worth, if you count at the rate of the meter updates, then the BM235 updates for 6 counts then holds for two counts before starting again. Goodness knows why, but I'm not sure rolling average explains it as that should keep on... well... rolling!

author: MaxPi
author_rank: Newbie
timestamp: March 20, 2025, 07:01:14 pm
content: Quote from: Furna on March 20, 2025, 06:09:29 amThe firmware version is indicated in parentheses, and the methodology remains the same: SDG2122X signal generator, 1V, 500µHz ramp.https://youtu.be/ZGsf4aS0TcI

author: Furna
author_rank: Frequent Contributor
timestamp: March 20, 2025, 09:10:44 pm
content: Quote from: MaxPi on March 20, 2025, 07:01:14 pmThanks for the video.I am not used to that versioning scheme for BM869S firmware; mine just show "6" when powered on while pressing "delta/500000" key.Also, my BM869S doesn't have the same behaviour.Unfortunately, I do not have a sig gen to mimic the same metodology.Anyway ramping up in 1 mA steps using a lab power supply, doesn't show any hold/pause.

author: mwb1100
author_rank: Frequent Contributor
timestamp: March 20, 2025, 10:53:21 pm
content: Quote from: Furna on March 20, 2025, 09:10:44 pmAccording to my notes (which may well be wrong), Brymen firmware versioning sometimes uses letters. As one example, my BM235 has revision "g" - which looks very much like a digit 9, but there's a subtle difference: the digit 9 has the bottom LCD segment showing, while the "g" doesn't (see photo). I have no idea why some meters use letters and others continue using (double) digits after ver. 9.

author: Furna
author_rank: Frequent Contributor
timestamp: March 21, 2025, 11:35:00 am
content: Quote from: mwb1100 on March 20, 2025, 10:53:21 pmWell, then I have version/revision "b"?Bought from Welectron March 2024

author: AVGresponding
author_rank: Super Contributor
timestamp: March 22, 2025, 04:47:43 pm
content: Just for shits and giggles I decided to test some of my handhelds to see if they did the same or similar.I tested: Flukes 8060A, 27, 87, 87V, and 289, Uni-T 139C, Tektronix 916, AVO M7027, Brymen 869S, Metrix 57Ex, Mastech 2108A, Norma 910, Gossen M242A, and Agilent U1401B.The only one that did have a similar issue was the Agilent, which pauses after three readings, four times, then pauses after two. The pause time is the same as the reading time, so a full cycle is 19 readings/pauses.

author: Furna
author_rank: Frequent Contributor
timestamp: March 22, 2025, 04:51:45 pm
content: Quote from: AVGresponding on March 22, 2025, 04:47:43 pmWhat was the testing metodolgy?What fw version on BM869S?Thank you

author: AVGresponding
author_rank: Super Contributor
timestamp: March 22, 2025, 05:56:41 pm
content: Quote from: Furna on March 22, 2025, 04:51:45 pmI used a TTi TG2511 to source a 25mHz +/- 1.9V triangle wave, so that I got a guaranteed constantly slowly changing readout. The meters were all used in autorange mode, and for those that have user variable integration times, I tested them all.The 869S fw version is P9

author: Monkeh
author_rank: Super Contributor
timestamp: March 23, 2025, 05:31:46 am
content: Quote from: mwb1100 on March 23, 2025, 04:29:29 amHis is a BM869s, not a BM235.