I was wondering about that - isn't the startup
current, when the
supply is first turned on, going to be substantial, especially with
the larger caps?
Generally, yes.
Any chance that could harm the DMM (or am I too used
to old
mechanical meters? ;-), or are they pretty well protected against
over-current situations?
I would imagine it depends on the meter; I don't know such things
enough to know which kind is commoner. I would tend to be paranoid
about it, so either I would charge the cap up directly and then
disconnect it and reconnect it through the meter, or I would hook an
SPST in parallel with the meter and make sure it's closed at initial
power-up.
Alternatively, I'd use something like a 1 ohm 1 watt resistor in series
and then hook a DMM set to voltage across that. But if the leakage is
down in the microamp range, that may work poorly to not at all (though
something like that is what current ranges tend to actually be
implemented as, AIUI).
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