[问答题]热电阻温度传感器产生误差的原因有哪几个方面？

参考答案：

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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