Submitted by TrystanLea on Tue, 01/12/2010 - 19:38.
Well I dont get any humming noise, so I dont think its normal... From their website it says: "Output mode: Current/33mA" I took that it meant 33mA at max current 100A which would work out to be a conversion factor of 3030. Lets say you wanted to measure 1V rms at 1kW then you need a 720 Ohm resistor across it. With a 100Ohm resistor and a 1kW load you should measure 0.14V. Do you get this?
Can you measure the rms current flowing in the circuit consisting of just the CT and the resistor?
Well I dont get any humming
Well I dont get any humming noise, so I dont think its normal... From their website it says: "Output mode: Current/33mA" I took that it meant 33mA at max current 100A which would work out to be a conversion factor of 3030. Lets say you wanted to measure 1V rms at 1kW then you need a 720 Ohm resistor across it. With a 100Ohm resistor and a 1kW load you should measure 0.14V. Do you get this?
Can you measure the rms current flowing in the circuit consisting of just the CT and the resistor?