Why should the three wire connection be used when measuring temperature by thermal resistance? If the three wire connection method is not adopted, the wire connecting the thermal resistance is adopted
The use of two wire connections is usually made in the acceptance of (tolerance) lead to changes in the resistance caused by measurement errors, or the wire resistance is minimal (large section or very short distance).
One end of the power supply is grounded at one end, and the other end is connected with the negative electrode to ensure accurate data
In thermal resistance measurement system, the conductor has the same thermal resistance effect as the thermal resistance measuring element, and the three wire connection method is used to eliminate the measurement error caused by the change of the wire resistance.