Apparently I tricked data, what ever that means.
A few links talking about various problems:
https://www.eevblog.com/forum/testgear/brymen-bm869-resistance-quirk/https://www.eevblog.com/forum/testgear/some-problems-with-my-brymen-bm869s/https://www.eevblog.com/forum/testgear/brymen-869s-dc-offset-issue-when-reading-acmv/msg3961952/#msg3961952***
I can believe what they are showing in the video but I can't believe someone is dumb enough to be moving around when making such a measurement. Then again, maybe it is my lack of moving around that constitutes my tricking of the data. I call it good practice.
To repeat their test, I used the attached resistor plugged directly into the meters to avoid effects from the leads. The meters were placed flat on the ESD mat. I set each meter to record the min/max and then waved my hand around the meter until the meter stopped detecting a change.
The worse meter I have by far is my Gossen Ultra. Note however that it is second best next to the UNI-T UT181A. The worse meter was one of my Fluke 189.
Watching the video that was linked, he shows about a 1Meg change which isn't too bad. My guess is had he used the min/max and tried to build up some more charge, maybe use some cloth, he could have made it seem much worse.
So is it a problem? For me, not at all. For our friend in the video, yes.
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Also, I want to be very clear that while the GMW Ultra has a lot of custom made shielding to help mitigate this problem, the UT181A is also modified to help it survive ESD transients. This modification could very well have improved its immunity. Some of the other meters tested have been damaged but repaired using OEM parts.
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I have added a few other high res meters. The UT61E+ has been fitted with different high speed clamp transistors than the original after I damaged it. However, I do not believe this would have any effect on the results. The OWON was also damaged but again, I don't believe it would effect the results.
We have a new winner..... The EEVBLOG/121GW I tested was one of the last two I had procured. This meter was never stressed in any way. Because they changed the filter constants so often, I have included the firmware revision.
Keep in mind again, it takes little intelligence to buy an expensive meter. Doing so doesn't make you any smarter. This is a dumb test. I am showing an average delta of 3.59, or about 4X more than shown in the video. I'm fine with it.