My actual click is working good but the current is measured by the current drawn by the source, and the negative is directly ground. Since a 2 wire instrument is a closed loop, this works ok.
But in 3 or 4 wire instruments, is being sourced by a external source and sending a current from a different wire (Return), which you cannot connect to the actual click board since the clickboard measures the draw from the source.
One solution could be getting a direct source for the instrument (let say 15V) and measuring the return current (Not connected directly to the GND). This way it will work for a 2 wire system (Connecting + and return to the click) and also a 3 or 4 wire system (Connecting only the return to the click).
Please help me getting the developers to make this or change the design of the actual clickboard.
thanks.
