Device for measuring voltage across a remote load

A method for determining a voltage across a remote load, comprising:

• a) providing a power supply configured to output a first output voltage to said remote load;
• b) locating a switch between said power supply and said remote load, said switch being selectively movable from a closed position to an open position;
• c) providing a measuring circuit comprising a first analog to digital (A/D) converter and a capacitor connected to said remote load and chargeable by said power supply when said switch is in said closed position;
• d) supplying said first output voltage to said remote load by said power supply when said switch is in said closed position;
• e) measuring said first output voltage;
• f) allowing said switch to be moved from said closed position to said open position;
• g) supplying a capacitor voltage to said remote load when said switch is in said open position;
• h) measuring said capacitor voltage when said switch is in said open position;
• and
• i) determining said voltage across said remote load based upon said measured first output voltage and said measured capacitor voltage.