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在低温物理实验中,必不可少的测量是温度的测量.铂电阻、铑电阻、锗电阻和炭电阻等电阻型温度计及热电偶是常用的.它们的感温特性示于图1和图2.对于一支电阻型温度计通以恒定电流,用数字电压表测定其上的电压,由电压的变化就能确定电阻的变化,从而确定温度的高低.本文介绍恒流
In low-temperature physics experiments, it is an indispensable measure of temperature measurement. Resistance thermometers such as platinum resistance, rhodium resistance, germanium resistance and charcoal resistance are commonly used, and their temperature sensing properties are shown in Figure 1 and Figure 2 . For a resistance thermometer through a constant current, measured with a digital voltmeter on the voltage, the voltage change will be able to determine the change in resistance, in order to determine the temperature level.This article describes the constant current