... /ACV, DCI/ACI, aa2W/aa4W, frequency/period, Key Feature:12 different measurement functions: DCV/ACV, DCI/ACI, Ω2W/Ω4W ... MAX/MIN/AVER/STD statistics HI/IN/LO comparator function GPIB and RS-232 interfaces for convenient system communicationCalibration ... reading & reading rate (readings/second) speedSlowMediumFastFull-scale reading (digits)1199,999119,99911,999Reading rate (readings/second)DCV, DCI3. ...