On Tue, 25 Jan 2011 12:29:44 +1100, Phil Allison wrote:

"Jeffrey Angus"
William Sommer******

Set the audio gen to about 100kHz and connect the output across the
electro under test -- then connect the scope probes directly to the
same cap (not the generator). You should see a small voltage at
100kHz on the scope.

If one takes that literally, the scope probes /will/ be connected
directly
to the generator.

Did you leave something out?


Nope, it IS connected directly to the generator. And the capacitor
across both.


** Connection of the scope direct to the electro cap is important.

Otherwise, the inductive reactance of the cable from the generator ( at
100kHz ) to the cap becomes included in the scope display of ESR - and
is often more than the ESR of a good cap.


..... Phil

So the cap goes before the scope leads?



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Live Fast, Die Young and Leave a Pretty Corpse