Please excuse me John, but we need to say more than just use an
accurate micro ammeter. The meter needs to be as accurate as the results
you want to get AND present a very small impedance (resistance) so that it
does not significantly disturb the CUT (circuit under test). By definition
a "high quality" DVM "should" do that but there are accurate meters
available that will disturb the measurements. Simply put, some meters will
accurately measure micro amps but you will get a precise measurement of a
value that only exists while the meter is in the circuit, not likely how
someone will use their camera.
I am condfident that John professionaly selected appropriate
equipment but not all of us know as much about this stuff as John.
The answer to the question is: with an appropriate micro ammeter,
insert the ammeter in the circuit in series with current flow. you can do
this by removing the battery cover and touching the ammeter leads to the
exposed battery and the case. If your meter requires it, observe polarity.
Patrick
P.S>
>Subject: Re: [OM] Measuring Battery Drain
>
>You need a reasonably high quality DVM meter, one that is known to be
>accurate in the MICRO amp range.
>
>John
>
>> Oly Shooters:
>>
>> Occasionally, someone will indicate that they have measured how much their
>> cameras draw on their batteries. Can anyone explain how he or she measures
>> this draw? Is it something that can be done with a very basic tester (the
>> kind used to test batteries, ohms, continuity, etc.)?
>>
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