Calibration of Thermostatic Bath Used on Electronic Thermometer Verification

In order to research the uniformity and volatility of thermostatic bath used on electronic thermometer verification, a method based on thermostat technical performance specifications is presented. Including the introduction of calibration device, the choice of standard device and experiment method. In the end the uncertainty analysis on the measurement of thermostatic bath uniformity and volatility is made. Experiment results show that the uniformity and volatility of this thermostatic bath are 0.0091°C and 0.0087°C/10min with the measurement uncertainty of 0.018°C, The results meet the requirements of electronic thermometer verification. It provides guarantee for the next electronic thermometer verification.