Hi,

I was trying to check the amp of a 24v DC circuit, and noticed that the amperage reading is different if I place the clamp facing a different end of the wire.



Same happens to the negative wire.

Any clue of whats happening here?

 

Check the manual. Since it is a DC probe it likely responds to residual magnetism in the pickup inductor's core. For Gaussmeters I had use degauss the probe or zero the amplifier (been over 40 years) between measurements otherwise as the probe became magnetized an offset would show up in the reading. As I said, check the manual.

 

To ask the obvious question: what does it read with no conductor?
Does the position of the black wire affect the reading?

 

Thank you so much for the replies.

Reading with no conductor is 0, however something is wrong with the meter for sure.
I went to the roof to check on my solar panel string and the same happens.



The correct reading in 12.5A.

Edit: A reset of the Zero value did the trick, all good now! Once again, thank you