I have a hantek6022be oscilloscope connected to a laptop to isolate it from ground. I connected a 1G ohm resistor in series with my oscilloscope to attenuate the signaal by 1000x. It all works good but when I connect it to a microwave transformer it makes an arcing noise. The weird thing is when I exchange the two oscilloscope wires connected to the secondary of the transformer with each other it does not produce this arcing noise. I have exchanged them several times but it always comes out the same.
How could it be by just merely switching the probes positions that it does not make this noise?
How could it be by just merely switching the probes positions that it does not make this noise?