I have an LCR meter which shows the ESR for electrolytic caps, but I have no idea how to interpret this number. How do you know if a cap is shorted or boardering on that status? I mean, if it gives me a reading of zero Ohms, that's obvious, but what if a small (4.7uF), medium voltage (35V) cap comes up with a reading of, say, 3 Ohms? Is that too low, like I expect, or should it be considered acceptable? I just don't know what a good cap would likely register, and have been surprised in the past when a brand new cap registered a lower ESR than the one I thought was bad. Where can I find info on the subject? Any ideas are welcome.
Thanks...
Dave