Selection of compensation wires?

There are no thermocouples of the PT100 type; this is the calibration code for thermal resistors. No compensation wire is required – a regular cable will suffice.

PT100 is a thermal resistor that does not require a compensation wire; a copper cable with a cross-sectional area of 1.5 square millimeters is sufficient

PT100 is a thermal resistor, with 2, 3, or 4 wiring methods; the 3-wire and 4-wire systems employ compensation techniques. Users need to take no action; simply connect the signal cable.

1. The fundamental differences among the three wiring methods for Pt100 platinum resistors: The two-wire and three-wire methods use the bridge method for measurement, and what is provided in the end is the relationship between the temperature value and the analog output value. The four-wire configuration does not use a bridge; it relies solely on a constant current source for sending current, with a voltmeter used for measurement, and the resulting value represents the resistance being measured. 2. The impact of the three wiring methods for Pt100 thermistors on measurement accuracy: The resistance of the connection wires and the contact resistance can have a significant effect on the temperature measurement accuracy of Pt100 platinum resistors. The three-wire or four-wire wiring methods for platinum resistors can effectively eliminate such effects. The detection devices connected to thermal resistors (temperature controllers, PLC inputs, etc.) all have four terminal connections: I+, I-, V+, V-. Among them, I+ and I- are used to provide a constant current to the thermistor, while V+ and V- are used to monitor the voltage changes of the thermistor in order to detect temperature changes. Please refer to the figure below: (1) The four-wire system involves connecting 4 wires to both ends of the thermal resistor; during wiring, the circuit loop and the voltage measurement loop are connected separately, which results in high measurement accuracy but requires more wires. (2) The three-wire system involves using three wires; when connecting a Pt100B platinum resistor, the reference point of the current circuit and the reference for the voltage measurement circuit are the same wire (that is, the I- terminal and V- terminal of the measuring device are shorted together). Slightly better precision. (3) In the two-wire system, only two wires are used; when connecting a Pt100B platinum resistor, the current circuit and the voltage measurement circuit are combined into one (that is, the I-terminal and V-terminal of the measuring device are shorted together, as are the I+ terminal and V+ terminal). The measurement accuracy is poor.

Ah, this question is way too easy; any KVVVP cable with a 3*1.0 specification will do, and there’s no requirement regarding the cable model.