Three-phase, 4-wire digital power meter. Measures voltage, current, active power, apparent power, reactive power, power factor and phase angle. Harmonic analysis from a fundamental frequency of 10 Hz to 440 Hz. Voltage input: 0 to 1000 V rms. Current input: 0 to 20 A. Accuracy: +/- 0.1%. Bandwidth: DC, 0.5 Hz to 300 kHz. Real-time waveform output. Includes built-in printer and high-speed IEEE-488 interface.