Investigating the Behaviour of Industrial Platinum Resistance Thermometers from 13.8 K to 273.16 K
Platinum resistance thermometers (PRTs) are the defined interpolating instruments for the ITS-90 from 13.8033 K to 1234.93 K. However, it is understood that the PRTs must satisfy certain characteristics if they are to be considered suitable for the task, e.g. made from high-purity platinum wire supported in a strain-free manner. On the other hand, the majority of PRTs for industrial use (IPRTs) must have fast response and ruggedness, as well as accuracy. Nonetheless, we undertook comparison calibrations from 13.8 K to 273 K of five IPRTs and the data were used to compute the coefficients of the ITS-90 deviation function appropriate to the temperature range. The residuals were mostly within ±2 mK, suggesting that the ITS-90 interpolation equations provide a useful means to describe the behaviour of such IPRTs, even at temperatures as low as 13.8 K.
Metrology Cryogenic thermometry Industrial platinum resistance thermometer Interpolation equation International temperature scale IPRT ITS-90
K.D.Hill
National Research Council of Canada, Ottawa, Canada
国际会议
2008年国际温度与热物性测量会议(TEMP BEIJING 2008)
北京
英文
55-58
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）