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LCR vs ESR meter for in-circuit testing of electrolytic cap

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RiRaRi:
Hello. Which tool is better for in-circuit testing of e-caps? I was thinking about getting proper LCR like DER DE5000 but as i have seen more accurate are ESR meters like ESR70 from Peak if we are measuring in-circuit. Is that true?
Sometimes ESR can not be accurate when in-circuit but still want to get the best tool for it.

KungFuJosh:
In-circuit testing is rarely simple, as there's often other things that will throw off your readings. That said, get both. The DE5000 is a great unit. Lots of people like the ESR70, though I don't have one (or want one).  Personally, I prefer the Shannon Tweezers ST42.

In any case, you still need to be careful about discharging things before testing, and aware of anything that might alter your test results.

RiRaRi:
Understood. But why to get both if one will be enough?

Kean:

--- Quote from: RiRaRi on September 10, 2023, 05:41:51 pm ---Understood. But why to get both if one will be enough?

--- End quote ---

So you have two different results and don't know which one is correct!  :-DD

Clearly you need three different units, so you can take the average of the closest two...  :-+

RiRaRi:
As i have seen on YT: DER DE 5000 can produce misleading results, and be completely off when in autorange. So i am not sure if thats good meter. Check EEVBLOG video about measuring ESR in-circuit.
Which tool should be the best then and most accurate?

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