I have one of these and recently started experiencing something weird. Whenever I set it to read DC voltage the meter will display an odd number like -49.1 mV at other times it will display -178.3 or some other negative number. The number will fluctuate a bit up and down but won't read zero. It was working fine before as I was able to take measurements from the simple circuit, I put together to learn how to use the meter.
The AC voltage setting does get close to zero, approximately 0.002V. The resistance is also working fine. I'm not sure about the ammeter as it appears to be off by one decimal place. According to my calculations and Pspice I should have a current of roughly 20 mA or 0.02A based on a 9V battery; 9.36V according the multimeter before it started acting up, and two resistors in series with a total resistance of 436Ω. When ever I hook up the meter in series to take a current measurement however it will only read when set to A but not to mA and I get an initial reading of 0.001A and 0.002A max.
I'm new to this so I'm not sure if I've done something to damage the multimeter. I've only used it with this little 9V circuit.
Any input is appreciated.
The AC voltage setting does get close to zero, approximately 0.002V. The resistance is also working fine. I'm not sure about the ammeter as it appears to be off by one decimal place. According to my calculations and Pspice I should have a current of roughly 20 mA or 0.02A based on a 9V battery; 9.36V according the multimeter before it started acting up, and two resistors in series with a total resistance of 436Ω. When ever I hook up the meter in series to take a current measurement however it will only read when set to A but not to mA and I get an initial reading of 0.001A and 0.002A max.
I'm new to this so I'm not sure if I've done something to damage the multimeter. I've only used it with this little 9V circuit.
Any input is appreciated.
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