I have lots of caps mostly from inverter welders . the TO-6 is a cap tester but maxes out at 2000 uf .My big inverter caps are 6000uf @450 volts . I was hoping that some knows more about cap testing / equipment . Thanks for the post .
What do you want to test? Just measuring the capacitance? Put them in series with another known value capacitor to bring the total for the string down below 2mF. Calculate Cunknown from Cmeasured and Cknown.
Why didn't you say you want to test a bunch of inverter capacitors in this post? We aren't mind-readers, you know.
Anyway, the most important spec. for caps used in power conversion is ESR. The best way to test ESR is with a network analyzer, but an extremely handy device that I use all the time is the Peak Capacitor Tester.
$110 + shipping and worth 10x as much. Sure beats carrying a rack-mounted network analyzer around, too.
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