讨论分析了用于校准固定发射率工作用辐射温度计的原理。在校准中,应用辐射面源是必要的,其发射率应与温度计的固定发射率一致,以保证温度量值传递的准确性,并分析了由于两个发射率的不一致而带来的温度误差,给出了在不同温度下由发射率偏离而引起的温度误差计算式。在发射率为0.95、温度为700 K的情况下,最大误差可以达到15 K。如果实际测量对象的发射率与温度计的固定发射率相同,则可以直接测量出被测对象的真实温度。

The principle for the calibration of working radiation thermometer with fixed emissivity is discussed and analyzed. It is necessary to apply the surface radiation source in the calibration, the emissivity of which could be consistent with that of thermometer to ensure the accuracy of temperature quantity value transfer. The temperature errors from the deviation of both emissivities are also discussed, and the error calculation formula is given, in the case of 0.95(emissivity)and 700 K(temperature) the maximum temperature error is up to 15 K.The radiation thermometers could directly measure the pratical temperatures for the targets, if the emissivity of target is the same as that of thermometer.