The 3 Phase VIF meter measures the true RMS voltage, currents and frequency of three phase electrical system. These parameters are displayed on three rows of four digit seven segment LED displays. The first row displays the voltage (both phase to neutral & phase to phase) of the selected phase. The second row displays the current in the selected phase and the third row displays the frequency. The channel selection is done by the buttons ‘V’ and ‘I’ for voltage & current respectively.