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[EEVblog2] Returned BM036 Clamp Meter Investigation

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golden_labels:


The PCB is covered with white silkscreen. What’s the purpose? Making understanding the circuit harder? Or what?

golden_labels:
Part 2:


Is it only my impression, or did the specimen got worse from the previous video? It feels like the value went even higher.

---edit:
Nope, my eyes are not deceiving me. The value is going up in Dave’s lab. Here are histograms of 21 values from each video:

It seems that the value is actually higher even after tearing it down.

Yesterday user shapirus reported a BM037 showing absurdly high values in crest mode. If I understand correctly, BM036 and BM037 are very similar meters. That gave me an idea: what if Dave’s BM036 is experiencing a similar issue and is stuck in crest mode? I imagine noise when switching to DC may be recognized as inrush peak and reported. That doesn’t explain why the value is slowly rising.

dexters_lab:

--- Quote from: golden_labels on March 19, 2024, 06:28:30 am ---
Is it only my impression, or did the specimen got worse from the previous video? It feels like the value went even higher.


--- End quote ---

totally, i noticed this too... it has increased over the two videos and importantly since the customer sent it in.

there's a component failing surely?

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