3 Wire Rtd Connections Diagrams. Three wire ohm platinum rtd sensors ptalpha. When long distances exist between the sensor and measurementcontrol instrument significant savings can be made in using a threewire cable instead of a four wire cable.
A very first look at a circuit layout could be confusing however if you can check out a subway map you could review schematics. 3 wire rtd wiring diagram whats wiring diagram. Assortment of 3 wire rtd wiring diagram.
4 wire rtd connections diagrams.
In a 3 rtd there are 3 leads coming from the rtd sensor. Needs two current sources. The design uses a resistance temperature detector rtd in a 3 wire configuration to minimize the errors introduced by the lead resistances of a remotely located rtd. Voltage drop across the line resistance are compensated disadvantage.