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Aneng SZ20 25,000 count, 1uV, 10nA, 20A

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Kleinstein:
Having a mixed AC + DC signal and also AC frequencies higher than the digital RMS part can handle can lead to odd results. Quite some meters have problems with this - not just the cheap ones and may not detect clipping at some point in the signal chain. Sometimes a manual range selection helps.

I just had an oscillating voltage regulator and my UT139 meter (uses digital RMS up to only some 1 kHz - so similar to this meter) did not show any AC reading - just no result, which is still better than some wrong value. In other examples one can also get wrong readings or an somewhat unexpected overload from the DC background  (AC mV range).

DC1MC:

--- Quote from: Kleinstein on April 16, 2023, 08:06:23 am ---Having a mixed AC + DC signal and also AC frequencies higher than the digital RMS part can handle can lead to odd results. Quite some meters have problems with this - not just the cheap ones and may not detect clipping at some point in the signal chain. Sometimes a manual range selection helps.

I just had an oscillating voltage regulator and my UT139 meter (uses digital RMS up to only some 1 kHz - so similar to this meter) did not show any AC reading - just no result, which is still better than some wrong value. In other examples one can also get wrong readings or an somewhat unexpected overload from the DC background  (AC mV range).

--- End quote ---

So, do you have interest in interrogate  >:D my SZ20 for science, I can DHL it to you immediately, I'm actually curious on how good or bad it is ? You can subject it to any abuse you see fit, if it doesn't survive, than it wasn't worth.

 Cheers,
 DC1MC

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