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Old 09-11-2009, 10:50 PM
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troypiggo (Troy)
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troypiggo is offline
 
Join Date: Nov 2008
Location: Brisbane, Australia
Posts: 4,846
Sorry for the thread resurrection, but finally got around to doing some testing tonight. I think the multimeter might be faulty unless my expectations are way off base.

I took a fully charged AA battery that I know works and tried to test it's voltage. Touching the probes on each end of the battery with the MM's range set to volts, it just showed zeros. I changed the range down to mV and I could see a reading that was slowly increasing. I mean really slow. Took maybe a minute for the values to climb to around 100mV. When I took the probes off the MM, the numbers started really slowly dropping again. If I reversed the probes, the numbers dropped and kept dropping below zero into the negatives.

This tells me it is kinda reading something, and the signs of its readings seem correct, but why is it so slow? I was expecting the reading to be instantaneous. If I waited for the reading to get to around the 1.2V I was expecting for the AA battery, it would have taken a good 15 minutes I reckon.

Am I right? Should I return it? Or am I misunderstanding and that's how it should work?
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