In order to meet the temperature requirement of standard resistance when the quantity value is transferred

an incubator with high precision and stability is designed. The acquisition of the temperature in the chamber is realized by the four-wire platinum thermal resistor Pt100. The fuzzy proportional-integral-differential（ PID） controller controls power of heating resistor by changing the duty ratio of the PWM output to keep the temperature stable. The standard resistor heating is simulated by changing the power resistor heating in the inner cavity to test the anti-interference ability of the incubator. The uniformity of temperature is evaluated by multi-point comparison. After data analysis

the stability of the incubator is better than 1 m K

and the temperature nonuniformity is lower than 6 m K. When the applied power is less than 0. 31 W

the incubator can maintain stable. The experimental results show that the incubator has good anti-interference performance

and its stability and uniformity meet the requirements. It can provide a stable temperature environment for value transfer of standard resistance.