Abstract: A single movement display meter includes a display input wherein the display input receives and transmits a display input signal containing information relative to only one property. A digital display is positioned to receive the display input signal and represent the digital input signal within a display, wherein the digital display has a front surface. A display filter mounts on the front surface of the digital display. A hub includes an input connector connectable to one or more wires to receive a hub input signal. A signal modification module connected to the input connector is capable of modifying the hub input signal to output the display input signal. A hub output communicates with the display input to transmit the display input signal.

Abstract: A system and method for isolating the input and output of a self-powered current loop includes coupling a voltage to frequency converter to the input terminals and connecting the output of the voltage to frequency converter through an optical isolator, either directly or through other circuitry, to the output terminals depending upon the nature of signals which are to be provided from the circuit.