DEVICE FOR MEASURING VOLTAGE ACROSS A REMOTE LOAD

摘要

A device for measuring voltage across a remote load comprises a power supply configured to output a first output voltage to the remote load. A switch is selectively movable from a closed position to an open position. A measuring circuit measures a load voltage across the load when the switch is in the open position and determines a voltage difference between the first output voltage and the load voltage. The measuring circuit may adjust the first output voltage to a second output voltage to compensate for the voltage difference. A second A/D converter may be coupled to the power supply the load capacitor. The second A/D converter may measure a voltage across a resistor wherein a change in the voltage indicates a change in the load voltage. The power supply may be adjusted to output a second output voltage to compensate for any change in load voltage.