I have the following device - polar electrolytic capacitor (it is/was having stripe on its sleeve):
I know its capacitance and voltage rating - 2.2 uF / 400 V, but accidentally removed the remainders of the sleeve so it is not clear where + and where - are.
I have found this question, and tried with 220 kOhm resistor, tried with 10 kOhm resistor, and can not understand the result. I have Fluke multimeter, and it seems to measure only tens of mAs. In both cases above I see it measures approximately 20 mA in both direction when connecting non-charged cap, and then current quickly goes to 0.
Is it multimeter issue - I need more sensitive device? Is there any other way to identify the polarity?
Are you certain that this is a polarized ("normal") aluminium electrolytic?
Did you measure case resistance to -ve lead?
Yes, both pins with case in all directions go to infinity.
Throw it away and buy a new one.
Bad idea, I can not find a replacement of the same size (6x11). I would try to reuse it, as I suspect it is of good condition (but I can not measure it, do not have such measurement equipment).