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在超高真空中温度测试上限要达到２６００～３０００℃。依据对测量数据进行多项式校正的理论和最小二乘数据拟合方法，给出了对钨铼５－钨铼２６热电偶分度表进行全温度范围分段多项式校正的数学模型，阐述了提高校正数据精度的有效方法。实验证明，多段校正方法在－２００～２３１０℃范围内精度可达±１‰。
In ultra-high vacuum temperature test ceiling to reach 2600 ~ 3000 ℃. Based on the theory of polynomial correction and the method of least square data fitting, the mathematical model of the polynomial correction of the temperature range of tungsten-rhenium-tungsten-rhenium-26 thermocouple indexing table is given. Effective method of data accuracy. Experiments show that the multi-step correction method in the range of -200 ~ 2310 ℃ accuracy of ± 1 ‰.