IR (Insulation resistance)?

Question

When I measure the IR of a capacitor with IR meter. First I need to charge the capacitor, normally with its rated voltage, charge the capacitor for a certain time. When I use higher charging voltage, the IR measured is also getting higher. Why?

Answer 1

I'm not sure an IR meter is the optimal way for testing capacitors?  But, if you do this, I would suggest that the capacitor only be tested at its rated voltage.  And, a meaningful measurement may only be obtained if you use a known good reference capacitor for comparison.

I expect, measurement values will vary between capacitor types, i.e. disc, ceramic, vs. electrolytic,  tantalum, etc.  So, I expect a good known reference is needed to make a valid assessment.

Answer 2

Not sure what you mean by IR?  To me it could be Infra-Red, in ohms law IR equals volts or in meaurement of an insulation breakdown you use a HiPot Tester or sometimes called a Megger Tester.    Please elaborate.  Describe your IR meter.

Does it look like the one shown at the website below?

http://www.transcat.com/Catalog/productd...