"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