I. Overview XD194E Series Multifunction Power Meter is a kind of the grid current, voltage, frequency, active power, reactive power, apparent power, power factor, power and other power parameters simultaneous measurement instruments. This instrument equipped with a communication interface (RS-485), open architecture allows you to connect a computer network; application Modbus communication protocol to facilitate computer programming or read data. The instrument can be applied to transformers, generators, capacitors and other motors distributed detection and site monitoring power grid, automatic control system display. It can easily be applied to the AC switch and measurement and data recording industry supply a variety of Distributed Control System range. On this basis Multifunction Power Meter, just add a PC-based industrial computer or central communication master display software, you can set up a monitoring system. Second, the typical application of a commercial and industrial applications of all measurement; 2, can replace the three-phase measuring meter; 3, distributed detection transformers, generators, capacitors and motors; 4, medium and low voltage systems; 5, SCADA, EMS, DCS integrators; three, programming and the use of one, multi-function power meters measure the electricity grid parameters: Ua, Ub, Uc, (phase voltage); Uab, Ubc, Uca (line voltage); Ia , Ib, Ic (current); active power, reactive power, power factor, active power, reactive power, frequency. All power parameters measuring instrument internal power save all information table, through the instrument of a digital communication interface can collect these data. 2, choose DISP control word is usually used to display the programmed state of content, DISP = 1 (three-phase voltage), 2 (three-phase current), 3 (active power, reactive power, power factor), 4 (frequency) 5,6 (positive and negative active energy), 7-8 (positive and negative reactive energy).