摘要
介绍了通过测量热电偶在液体槽中250℃时的浸没实验特性评价热电偶均匀性的方法。构建的实验装置在液槽上的一个狭小的空间内可产生较大的温度梯度场，热电偶电极通过该梯度场进行扫描得到了在不同位置的热电势值。对一组新制和使用一段时间的铂铑。。一铂热电偶进行测试，发现实验数据具有较好的重复性，新制作的热电偶热电势的均匀性明显优于使用一段时间的热电偶。
The method of measuring the immersion characteristic in a liquid bath at 250℃ to estimate the inhomogeniety of thermocouple is introduced. Experimental apparatus can produce a large temperature gradient field in a small gap above the bath, when the electric pole of the thermocouple scan the field, the thermoeleetrics at different locations are recorded. A group of fresh Ptl0Rh-Pt thermocouples and an used one are tested. The repeatability of datum is satisfied, and the homogeneity of fresh thermocouDles is better than the used one. which is concorded to lo^eal Dresumntion.
出处
《计量学报》
CSCD
北大核心
2013年第4期356-359,共4页
Acta Metrologica Sinica
关键词
计量学
热电偶
不均匀性
液槽
Metrology
Thermocouple
Thermoelectric inhomogeneity
Liquid bath
