Fluke 1000s ac current clamp fluke fluke i1000s the fluke i1000s is a clamp on ac current probe designed to expand oscilloscope applications in industrial and power environments ideal for measuring distorted current waveforms and harmonics this current probe provides the following features allows accurate measurement of currents from 100ma to 1000a rms 5hz to 100khz without breaking into the circuit fluke i1000s ac current clamp 1000 a