在低温温度测量中,目前大多采用电阻温度计。其电阻值是温度变化的函数:T=f(R)。一般测试法是在电阻二端通一电流,通过测其上的电压降,根据欧姆定理得知电阻值。如果在测试中,提供一恒流源,只要读出电压值即可知电阻值,再由T=f(R)关系就知道了所测温度,这样在使用中方便的多。这里介绍一种 In the low temperature measurement, the current use of resistance thermometer. The resistance is a function of temperature change: T = f (R). The general test method is to pass a current in both ends of the resistor, measured by the voltage drop on it, according to Ohm’s law that resistance. If the test, to provide a constant current source, as long as the voltage value read out to know the resistance, and then by T = f (R) relationship to know the measured temperature, so much easier to use. Introduced here