... , including measurement of multi-rate energy and 4-quadrant energies, harmonic and quality of electrical network analysis, 4 logic inputs, 3 ... );3, Measuring component and THD of the 2~31 ranges harmonic of current and voltage, current K-factor, voltage crest factor ... drying contact inputs, with +5V powerLogic output (DO)Mode: 4 NO contacts (AC 250V/3A, DC 30V/3A)AccuracyFrequency 0.01Hz ...