RTD (2-wire, 3-wire, 4-wire)
The following schematic diagrams show the relative effects of 2 ohms total wire resistance on a RTD circuit: Clearly, wire resistance is more problematic for low-resistance RTDs . In the RTD circuit, wire resistance counts for 1.96% of the total circuit resistance. we can eliminate this resistance using 4-wire and 3-wire methods. 4 wire RTD… Read More »