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| Brymen BM789 |
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| PushUp:
Unfortunately, the "new" Benning MM 7-2 with "FW 72001" has the same problem/bug: I found the spot with my "Vishay Precision Potentiometer" immediately @ 661.x Ohm,.... ....however, the MM 7-2 does not autorange for ever, but simply shows OL after autoranging (it is not as fast as the other DMMs). When I pull the test leads out of the MM 7-2 and put them back in, it shows an interim value before going back straight to OL. After that I only had to swap the test leads into the Fluke 289: ..., the Keysight U1273A... foto fun kostenlos ...and the PM XTRA,... ...which have not any issue, showing the "right" resistance instantly depending on its precision. ...and back it goes...! :popcorn: Cheers! :( |
| joeqsmith:
--- Quote from: EEVblog on August 10, 2022, 06:36:36 am --- --- Quote from: joeqsmith on August 10, 2022, 01:19:19 am ---I should add that the 789 shown was the last meter I tested which had been setup at the factory. It is not one of the meters I had swapped parts on. Also, maybe a bit more to the story. Looking at one of the 786 meters, w/ 78605 which had modified with the latest parts of that time, does not exhibit this problem. As I mentioned, I had forwarded this information to Brymen. --- End quote --- The 786 and 789 firmware bases are different. Possible it exists in one and not the other. I've gone up by 1 ohm increments from 600ohm to 680ohm and there is no problem. --- End quote --- Based on the posts, it seems so. I have confirmation that Brymen is now working on it. Guessing the OP did not contact them as it did not seem like they were made aware of the problem until now. :-// I'll post an update when I have it. |
| TCbystander:
--- Quote from: PushUp on August 10, 2022, 10:42:40 am --- ....however, the MM 7-2 does not autorange for ever, but simply shows OL after autoranging (it is not as fast as the other DMMs). When I pull the test leads out of the MM 7-2 and put them back in, it shows an interim value before going back straight to OL. --- End quote --- Seems like you were using the continuity function, not the resistance function instead ??? |
| coromonadalix:
hmmmm seems like it since you have the continuity beep logo on the screeen ?? |
| PushUp:
I am quite sure, that I was in Ohms mode, when I did my decisive measurement, as I saw different values, when I searched for the 660 Ohms region and have just forgotten to pay attention to the settings, when doing the photosession behind the other DMMs, after playing around with the buttons of the MM 7-2, which also keeps the last settings... As I have already sent the Benning back home, I cannot repeat my measurement. However, as I don't want to ruin Bennings sellings, I hope that I was mistaken and quote the assumption of innocence for Benning with its MM 7-2 and their FW 72001, that they have paid attention to the mentioned bug, as they should know, which older Brymen-FW they use as their own first FW-Version "72001"... Next time I will make a video for myself, having a better proof of concept, as I am also annoyed about my lousy documentation, but as I will not buy a Brymen/Benning again, maybe someone else is willing to repeat the test, because what I can definitely say is, that I am totally happy with my aleady bought handheld DMMs and don't see any reason to buy another one... :) Sorry & Cheers! ;) |
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