On Sat, 11 Jul 2015 07:04:05 -0700, Phil Allison wrote:

Cursitor Doom wrote:

Phil Allison wrote:

Be aware that the ESR meters intended for service work are only good
for electrolytic caps ( regular aluminium and tantalum ) and
interpreting the readings correctly requires significant operator
knowledge and/or a similar electro to compare with.

...Or a table of expected values vs. voltage rating vs. capacitance -
which comes with the Peak meter.


** IME, such tables are far too vague and of date for modern electros.

The goal in servicing & refurbishing work is to find electro caps that
are *on the way out* as well as obviously dead ones.

If in doubt, comparison with a the closest new electro available is a
good move.

Well maybe. But it'll slow the process down massively as it's not just
the capacitance that causes ESR values to change. As you well know.