Beckmann thermometers are designed to measure small temperature differences . hence the calibration of a beckmann thermometer refers to comparing the true temperature differences obtained from the laboratory s standard thermometers against the observed temperature differences indicated by scale readings of the unit under test 贝克曼温度计是用于测量微细的温差，因此本所将其标准温度计所录得的真正温差与接受测试元件的标度读数所显示的观察温差进行对比，以校正贝克曼温度计。
