I know this is off topic, but I also know someone here will certainly know.
Air Conditioner guy was out today for annual maintenance, the air mover had a 15uF motor start cap that he measured at 7uF, so we replaced it. No quarrels with that, but here's what I couldn't understand. I tested it on my cheapo DVM, which I rarely use for cap testing, and the capacitance reading just kept going up and up and up, 20uF, 30uF, 40uF, etc., clearly not right. I grabbed a 22uF electrolytic, and that quickly stabilized on my DVM as 19uF, on the tech's meter (better than mine) 23uF. So that was believable. Now I really don't know much about motor start caps, but they are "unpolarized", compared to electrolytics ? How to account for its anomalous behavior with my DVM ? Chuck, K1OM
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