1．问题的提出现有一个标称温度示值被调控到400℃的工业容器，计量人员选用带K型热电偶的数字式温度计来测量该容器内部某处的实际温度（见图1）。从制造厂说明书查知数字温度计的分辨力为0．1℃，准确度为±0．6℃K型热电偶每年校准一次，今年的校准证书表明其不确定度为2．0 1. PROBLEM PROBLEM There is now an industrial vessel whose nominal temperature indication is regulated to 400 ° C. The dosing staff selects a digital thermometer with a K-type thermocouple to measure the actual temperature somewhere inside the vessel (see Figure 1). From the manufacturer’s manual check the digital thermometer resolution of 0.1 ℃, accuracy of ± 0.6 ℃ K-type thermocouple calibration once a year, this year’s calibration certificate shows that the uncertainty of 2.0