![]() 1A through the coil will show about 180A on the clamp meter.īut 180 turns is too many when testing at 1A, the constant current mode in my power supply is a bit low on resolution for this. It would be fairly easy to make a high current AC supply: Add a few heavy gauge turns to a transformer and run it through the clamp, then I could use a variac to feed the transformer, but it would not solve the high DC current.Īnother solution is to pass the wire multiple turns around the clamp, this works for both AC and DC: I will be applying large current to the clamp meters and see if the offset and readout will change afterwards.įor this I need some equipment and I do not have a DC or AC power supply with enough amperes. Magnetized clamp, this is what I will be looking on here.Offset in the preamplifier, any electronic DC amplifier has a small DC offset.Magnetic fields, like earths magnetic field, but can also be from other equipment and iron in the building.Clamp meters magnetization, demagnetization and offset Clamp meters magnetization, demagnetization and offsetĬlamp meters has a offset when measuring DC current, this is due to a couple of factors:
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