[russell_w_b]

I've used a Megger in series with an AVO to good effect. Start on the 1A range whilst cranking, then reduce to the uA range to check for leakage. Maybe it would be better to insert a series limiting resistor if the cap suddenly went short, but I've got away with it thus far... Disconnect the cap smartish or use a diode, though, or the cap will discharge through the meter the other way!

I sometimes check larger caps with an AVO in series with a limiting lamp or resistor (if using a transformer derived supply instead of mains). The voltage across the cap and the current through it can be measured and hence the capacitance. I've known, odd times, a variation of readings when compared to sticking the cap on the bridge or puff-ometer, and I feel that sometimes it's better to check as near its working voltage as poss.