Fluke 374 true rms ac dc clamp meter fluke fluke 374 p the fluke 374 true rms clamp meter can read up to 600 v and 600 a in both ac and dc modes it offers improved performance perfect for many current measurement situations the fluke 374 features true rms ac voltage and current for accurate measurements on non linear signals and resistance measurement up to 6000 omega with continuity detection p p large easy to read backlight display automatically sets the correct measurement range