In-situ measurement and calibration device for low temperature fixed point thermodynamic temperature

Abstract

The utility model provides a kind of low temperature fixed point thermodynamic temperature in-situ measurement and calibration device, comprising: working cavity, working cavity is closed arrangement, working cavity is equipped with microwave resonant cavity and fixed point coupling component, microwave resonant cavity is equipped with first thermometer, and fixed point coupling component is equipped with fixed point device and second thermometer;Temperature control module is used to provide working temperature for working cavity;Pressure control module is used to provide working pressure for working cavity;Acquisition module includes the analyzer connected with microwave resonant cavity and the temperature measurement bridge connected with second thermometer, and the analyzer is used to acquire the microwave resonant frequency in microwave resonant cavity, and the temperature measurement bridge is used to acquire the resistance value of second thermometer.The utility model can realize in-situ measurement fixed point thermodynamic temperature T , simultaneously realize fixed point T 90 Reappear, make the standard resistance thermometer R-T Relationship of construction is more accurate.