Multimeter Tester
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On a multimeter tester what does 400μA, 4000μA, 40mA, 400mA mean for DC current?
I am trying to learn the meanings so I don't burn up a tester. I have a Craftsman 82315 tester.
The settings are the full scale settings and the maximum current that can safely be measured on each setting, 0.0004, 0.004, 0.04 and 0.4 amps. There is some margin of safety for each setting, but the meter could be damaged if subjected to a current exceeding the scale setting even for a very short time. When making readings, it is best to set the meter to a higher scale that you expect to need and then reduce the setting if you find that the current is lower.
The meter may be protected by an internal fuse. The fuse may be accessible through the battery compartment or you may need to open the meter case with a screwdriver to change the fuse. Read the manual and buy some spare fuses. The Sears service department probably sells spare fuses or you may find them at Radio Shack.
The quickest way to burn up a meter or blow a fuse, is to have the meter set to a current or resistance setting when you try to measure voltage. You need to learn to always be careful.
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December 5th, 2007 in
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