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热电阻温度传感器产生误差的原因有哪几个方面?

问答题
2022-01-04 12:52
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正确答案

有下面三个方面:
(1)分度误差:由于热电阻材料纯度和工艺的差异将产生分度误差。
(2)线路电阻变化引起误差:热电阻是通过测量电阻大小来测温的;因此,线路电阻的大小将影响测量结果,引起测量误差。
(3)通电流发热引起误差:测量热电阻的阻值时,要通过一定的电流,产生热量,若散热量小于产生的热量,电阻体将升温而引起温度测量的附加误差,其大小与流过电流的大小有关。


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