摘要
给出了在0～660 323℃温区标准铂电阻温度计(SPRT)的两个二次偏差函数:一个是由水三相点、锡凝固点和铝凝固点的检定值来确定;另一个由水三相点、锌凝固点和铝凝固点来确定。这两个二次偏差函数是ITS 90温标在0～660 323℃温区标准铂电阻温度计偏差函数的一个很好的近似。使用70支标准铂电阻温度计检验了这两个偏差函数,其误差一般不超过2 4mK,最大不超过4 7mK。
Two quadratic deviation functions for standard platinum resistance thermometer(SPRT) in the range 0 ℃ to 660.323 ℃ are described, one of them can be determined from the calibration values at the triple point of water and the freezing points of tin and aluminum, and the other can be determined from those at the triple point of water and the freezing points of zinc and aluminum. These two functions are very close approximate to the ITS-90 deviation function in the range 0 ℃ to 660.323 ℃. Seventy SPRTs had been used to check the functions and the errors were no more than 4.7 mK.
出处
《计量学报》
CSCD
北大核心
2005年第2期107-110,共4页
Acta Metrologica Sinica
