Fluke 373 600 A True-rms AC Clamp Meter (Mfg. part no. 3780249). The new Fluke 373 Clamp Meter offers improved performance perfect for any ac only current measurement situations. Featuring true-rms ac voltage and current measurements, and resistance measurement up to 6000Ω with continuity detection, the Fluke 373 is everything you need, plus a little more. Safety Conformance EN/IEC 61010-1:2001; 600V CAT III, 300V CAT IV.