I'm working on a project where I'm measuring current with a split core CT and feed the signal to an Arduino analog input. The problem I'm facing is that I get noise from nearby systems. Example is when I wire up a small electrical pump (about 250mA), and hold my split core current transformer next to it (without clipping it onto the wire!) I still get readings on the analog input.
This will be a big problem as I'm planning on sensing current at locations where there will be other wires conducting current around. The split core CT I'm using is the SCT-013-005.
Does anyone have any solution for this problem? Is it simply a poor quality current sensor that is not isolated from outside electrical noise? I have not yet tried to measure current with the CT, and have another component nearby drawing current.