Megger PMM-1 Power Multimeter Measuring Instrument provides simultaneous measurement and display of all three-phase system parameters, accurate phase angle measurement at low current levels and versatile, menu-driven instrument with a built-in timer and data-logging. The PMM-1 is a portable, battery or line operated, multi-function measuring instrument designed to measure AC primary and secondary currents, voltage power, reactive power, phase angle and frequency of single and three-phase systems. A high speed recording feature can capture starting currents of three-phase motors. All measured values are displayed on a large easy-to-read graphic display. RS-232 data and parallel printer ports are provided.