What is the principle behind error elimination in three-wire thermoresistors?
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What is the principle behind error elimination in three-wire thermoresistors? I don’t quite understand.
The distance from the thermal resistor to the instrument is uncertain; in other words, the resistance of the wires is also uncertain. In a three-wire thermal resistor system, all three wires are made of the same material, have the same diameter, and are of the same length. Compensating wire resistance: Thermal resistors use resistance values to represent temperature; by subtracting the conductive resistance, the actual resistance is obtained
The purpose of adding another wire is to distribute the line resistance across the two arms of the balanced bridge, thereby compensating for the measurement errors caused by the resistance of the two-wire system.
Could the experts draw a diagram to illustrate this? I still don’t quite understand it. Thank you very much.
Balanced bridge; it’s not easy to draw, it works on the principle of an equilateral triangle