Discussion on a Calibration Method for External Standard Thermometers
In this paper,according to the characteristics of the external standard thermometer,a calibration device is designed.Through the cooling and heating equipment,the heat is exchanged in the box,the air is circulated by the circulating fan,and the flow rate of the refrigerant is controlled by the solenoid valve switch,so as to realize the temperature control in the thermometer box.Experiments show that the device has the advantages of wide tempera-ture range,fast cooling and heating speed,small temperature fluctuation and uniformity,large number of calibra-tion,simple method,etc.It can effectively solve large quantity and long calibration time,etc,and meet the needs of most external scale thermometers calibration.
external standard thermometercalibration deviceexperimental verification
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