Martindale mm64 digital multimeter martindale mm64 p the martindale mm64 is a digital multimeter which performs all the basic test functions plus it has the additional benefit of temperature measurement from 35 to 750 deg c p p it measures ac and dc voltages from 0 1mv to 600v ac and dc currents from 0 1 956 a to 200ma resistance up to 20m omega frequency up to 40khz and capacitance from 0 01 956 f to 20mf p martindale mm64 digital multimeter