【摘要】 中国计量科学研究院在持续对高温基准装置研究工作的基础上,提升了光电高温计信噪比、非线性和辐射源尺寸效应等关键性能,并完善了光电高温计性能参数测量平台。与之前高温温标通过钨带灯传递不同,以“参考固定点—光电高温计”方式进行了银点以上高温温标的复现和传递,该方式可以避免光电高温计长期稳定性的影响,并将高温温度上限从2 200℃延伸至2 474℃,实验分析得到961.78~2 474℃的温标扩展不确定度(k=2)为0.08~0.62℃。2009年中英西三国温标复现比对结果验证了三国国际温标的一致性,并支持了上述不确定度评定。新传递方法可为精密光电高温计提供最高水平校准,并可扩展应用于900 nm等红外高温计校准。更多还原

【Abstract】 The high-temperature primary standard system was gradually improved through the continuing research work at the National Institute of Metrology(NIM) in China.Based on the developed primary standard pyrometer,an improved scheme,the "fixed-point blackbody pyrometer" assembly,was apphed to realize and disseminate the International Temperature Scale of 1990(ITS-90) above the silver point.The new scheme can correct the drifts of the pyrometer and extend the highest temperature range from 2 200 ℃ to 2 474 ℃.The expanded uncertainties of the scale were 0.08 ~ 0.62℃ between the temperature range 961.78-2 474 t.The uncertainties of the temperature scale are strongly supported by the international comparison of the high temperature fixed points’ ITS-90 values among China,the U K and Spain in 2009.The new method could be not only applied in the highest level calibration of the precise pyrometers,but also in the calibration of the 900 nm infrared thermometers.更多还原