论文部分内容阅读
人們在現实生活中测量溫度的办法,总是通过用某一指定的物体,选定其某一随温度的改变而改变的物理量来作为温度的度量。若以該物体的电阻随溫度而改变的特性作为溫度的指示,那么,这种測量溫度的仪器,就叫做电阻溫度計。其中要以鉑电阻温度計为最好,因为鉑的电阻溫度系数相当的大(由0°到100℃间铂的平均电阻溫度系数为3.92×10~(-3)度~(-1)),它与溫度变化的关系比較規则,又具有較高的比电阻(铂的比电阻为0.0981欧姆·毫米~3·米~(-1))。这样,在指定铂
People in real life measure the temperature, always by using a designated object, select a change with the temperature changes in the physical as a measure of temperature. If the resistance of the object changes with the temperature as an indicator of temperature, then the temperature measuring instrument, called the resistance thermometer. Among them, platinum resistance thermometer is the best, because platinum’s resistance temperature coefficient is quite large (average temperature coefficient of resistance of platinum is 3.92 × 10 -3 degrees -1) between 0 ° and 100 ° C. , Which has a more regular relationship with the temperature change and a higher specific resistance (the specific resistance of platinum is 0.0981 ohm · mm -3 · m -1). In this way, the designated platinum