一等标准水银温度计可用来完成温度的计量溯源。为保证检定结果的持续有效性,一等标准水银温度计的完全重校准是必要的。文章对一等标准水银温度计零位值的完全重校准方法进行了研究,指出目前国内恒温槽实际温度计算方法与国外的不同,并对两种计算方法中涉及的分度修正值、可调分度修正值进行了比较。 First-class mercury thermometers can be used to complete the measurement of the temperature source. To ensure the continued validity of the test results, complete recalibration of the first-class mercury thermometers is necessary. This paper studies the method of completely recalibrating the zero value of first-class standard mercury thermometer. It points out that the actual temperature calculation method of domestic thermostat is different from that of foreign countries. The correction values ​​of indexing, Degree correction values ​​were compared.