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Old 10-11-2021, 03:06 PM   #2
Join Date: Feb 2021
City & State: Minsk
My Country: Belarus
Line Voltage: 230VAC 50Hz
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Posts: 53
Default Re: Old electrolytic capacitors

1. As a read producers adviced to keep capacitors in ziplock packs to prevent shortage of their life
2. I bought LCR meter and evaluate the capacity, ESR, Z, D and other parameters and compare measured numbers to datasheet.
DC leakage is easy to measure just with a millivoltmeter.
Capacitors with high ESR will not necessarily fail immediately, but the operation of the equipment may be unstable, the symptoms will increase over time and under heavy load. If you replace a bad capacitor in time, you do not need to change the other components.
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