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Old 12-08-2016, 09:57 AM
Findm-Keepm's Avatar
Findm-Keepm Findm-Keepm is offline
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Join Date: Jun 2007
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Use a resistor to measure leakage - ohms law applies. I have the LC102 and the calibration uses several high-megohm values in calibrating the leakage at various voltage points.

I use a Sencore Field Calibrator originally sold with the LC53 and LC75 to verify calibration along with some Siemens 1% polystyrene capacitors for the lower ranges. For leakage/ohms, I simply use ohms law and some resistors - don't worry about the tolerance - my LC102's leakage accuracy is stated at 2% up to 500V, IIRC. After that, the leakage accuracy is quoted in percent plus an +/- least-significant-digit value. My inductance calibration checks are with some really nice mil-surplus coils with 2% tolerance. So far, spot on.

To be painfully honest, the LC102 leakage function is hardly used, as I can replace a cap quicker and cheaper than pulling one, testing it, and making a decision. Time=money...

Ringing tests on older flys and yokes is accurate, but the newer IHVTs sometimes trip up my Sencore - so I go the HR Diemen flyback tester (tests at real voltage values...) - this works with all but some Mitsubishi flybacks, which are like Hen's teeth anymore, so no worry..

All the LC-series from the LC75 and up are about the same schematically - just added features or ranges. Handy, but for real convenience, I use portables mostly anymore, and leave the LC102 to find real faults with stuff. The leakage/high resistance check is nice for measuring HV resistors and it'll even light up Nixie tube segments for testing.
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Brian
USN RET (Avionics / Cal)
CET- Consumer Repair and Avionics ('88)
"Capacitor Cosmetologist since '79"

When fuses go to work, they quit!

Last edited by Findm-Keepm; 12-08-2016 at 10:05 AM.
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