blue signal is the current
red signal is the voltage
this sensor output ~1v/30A.
the output voltage have been adjusted to be read by an arduino, the arduino read 0-5v so the signal is centered at 2.5v and now +-30A give 1.5-3.5v.
Note that it will work at 60Hz and 50Hz,this is the same thing as a real amp meter clamp but with the centering circuit as addition.