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Bench LCR Recommendations?

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KungFuJosh:
Thanks for your help and the tips!

I already have plenty of caps for reference, not sure about the ceramic types though. I'll get some if I need to. I'll make a reference chart with a set of specific caps, and cross check them on the DE5000 and Shannon tweezers.

For SMT stuff, for now I'm just going to keep using the Shannon tweezers, but I may setup a SMT fixture also in the future.

Thanks for the tips on the measure setup- Avg 16 is much more stable, and I'm sure plenty accurate enough for my needs.

I turned on Vm/Im, what do you consider very low?

I wonder, has anybody done a hardware comparison between the TH2830 and TH2832? What I really wonder is if there's any difference between them besides their firmware and the sticker on the front.

mawyatt:
Just measure an open and short, that will give you an idea of what's to be considered as low for current (open) and voltage (short). Note you can change the output Z to 30 ohms for high current use with low impedance DUTs, and the output voltage to 2 volts for high impedance DUTs. Also study up on the ALC use (3.5.2), which can maintain a constant Voltage or Current for the DUT.


Edit: CAUTION, this instrument can deliver 2 volts RMS and 67ma RMS to the DUT, so some caution is advised when evaluating sensitive DUT characteristics.

Anyway, lots of useful features and whatnot in these instruments, and lots of details to learn to use properly :-+

Best,

KungFuJosh:
I setup a test with 3 LCRs and 3 other meters. Results attached.





The Siglent and Amprobe meters agree a lot. Even their BS numbers when trying to measure in the pF were similar.

The ESR numbers marked unstable were wonky. They had a fairly large range they cycled through. I assume it would be easier at a lower frequency, but 1k it was.

Martin72:
Testfrequency is missing..
Comparing with a bench DMM is a little bit "unfair" because I strongly doubt that the DMM use the same measure method like the LCRs do.

KungFuJosh:

--- Quote from: Martin72 on May 30, 2023, 10:44:37 pm ---Testfrequency is missing..
Comparing with a bench DMM is a little bit "unfair" because I strongly doubt that the DMM use the same measure method like the LCRs do.

--- End quote ---

Test frequency for the LCRs is 1kHz (noted on the spreadsheet). It wasn't really intended to be fair for the other meters, they were just added for reference. I don't think it's generally fair to compare C measurement on a DMM anyway. It's just nice that they say something. Though I found it interesting how close the 2 DMMs were, in their measurements and failures.

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