My multimeter (Mastech MS8226T) measures about 200 mV without connecting the probes to anything, if placed near my Desktop PC. This can be as high as 400 mV if my meter leads are drawn out (as opposed to coiled or tangled). The voltage drops to about 10-25 mV when I move away from my PC to any other point in my flat. The multimeter without any leads connected shows about 25 mV when near my PC but settles to about 3 mV when away from my PC.
I wonder if others have had similar issues. I presume this is RF pick up with the leads acting as an antenna. Can there be any other causes ? What is an effective resolution ? Does your multimeter also have similar behaviour ?
regards
I wonder if others have had similar issues. I presume this is RF pick up with the leads acting as an antenna. Can there be any other causes ? What is an effective resolution ? Does your multimeter also have similar behaviour ?
regards