摘要
长期以来工业铂热电阻均采用Callendar-VanDusen(CVD)方程的方法来分度,标准铂电阻温度计是根据国际温标ITS-1990采用不同温区的内插公式来分度。在CVD方程和ITS-90温标的内插公式之间存在系统差异。实验研究及结果表明,将ITS-1990国际温标内差公式的方法用于工业铂电阻温度计是可行的,在0~300℃实验温区、100℃以上采用ITS-1990国际温标分度方法其一致性更好,准确度也明显优于CVD方程的计算结果。
For industrial-type platinum resistance thermometer (IPRTs), the most-used interpolation model (resistance versus temperature ) is based on the Callendar- Van Dusen (CVD) equation,and standard platinum resistance thermometer (SPRT) with interpolation equation based on the ITS - 1990. There are difference between CVD equation and ITS - 1990. The experiment results show, it is feasible to use ITS - 1990 interpolation methords for IPRTs. There are more uniformity and accuracy with ITS - 1990 than that with CVD equation.
出处
《计量学报》
CSCD
北大核心
2011年第B12期62-65,共4页
Acta Metrologica Sinica