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Accuracy of LCR meter?

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Faringdon:
Hi,
Do you agree this LCR meter  cannot realistically measure 37uH or so?...because its accuracy  is stated as 2% of 2mH = 40uH.

LCR meter
https://www.farnell.com/datasheets/1955257.pdf

rs20:
Yeah, I suspect it'd be fairly useless for that, but I think your reasoning is wrong.

37uH would get rendered as "0.037" mH, except it would it would be off by up to (2% of 37 uH (negligible; ~ 1uH) PLUS 8 counts (where the least significant digit here is uH, so ~ 8uH)), so anywhere from "0.028" to "0.046" mH would be reported in the case of a nominal 37uH inductor. In other words, about +/- 25% error on the inductance value. So pretty hopeless.

Martin72:
Hi,


--- Quote ---because its accuracy  is stated as 2% of 2mH
--- End quote ---

According to the sheet you´ve linked, there is no remark that the 2mH range got 2%.
It´s only stated, the BEST accuracy will be 2%, not on which range.
Apart from this, 2mH as lowest range makes it useless.
It should have 200µH range at least:

https://www.amazon.de/Kapazit%C3%A4ts-Induktivit%C3%A4ts-Pr%C3%BCfvorrichtung-Meter-Selbstentladung-Strecken-Anzeige/dp/B07BR2N7GB/ref=asc_df_B07BR2N7GB/?tag=googshopde-21&linkCode=df0&hvadid=266451026830&hvpos=&hvnetw=g&hvrand=7066970650968613726&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9043666&hvtargid=pla-444110103102&th=1

My recommendation :
Save a little bit more money and buy a DER DE5000.
Starting at appx 100 bucks, depending on the accessoires, there´s no better choice for the money, imho.

bd139:
Buy Peak LCR45 from CPC. That will measure reliably down to 0.3uH which is outside it’s specified capability. I’ve tested one against a fixture with a signal generator and scope and a 6.5uH inductor was measure at 6.6uH.

I wouldn’t buy the DER. There’s no warranty service or calibration options unlike the Peak.

Martin72:
Warranty: Who cares about it, when buying ultra-lowcost stuff like DER or peak.
Calibration: It´s the same, open and shorted probes.
We got LCR40 and LCR45 at work for quick checking, can do a comparison between them and the DER, if it´s interesting for anyone.

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