Many testing methods determining thermal emissivity of various materials have been published so far but the methods estimating the virtual emissivity of infrared thermometers themselves are not commonly available and users have to rely on manufacture information. However, not all manufactures provide the value of virtual emissivity along with their infrared thermometers and users who need this value for their special laboratory work are forced to find a method for estimating this quantity. In this paper, a method for the estimation of virtual emissivity of infrared thermometers is described. It is based on comparative method that uses two precise black body etalons of different emissivities and heated to the same temperatures. The infrared thermometer measures repeatedly the temperature of each etalon and the statistical ensemble of measured values is processed by the graphical-numerical procedure. The statistical uncertainty of this procedure is analyzed and showed that results are of acceptable accuracy if the used devices ensure sufficiently high precision.

到目前为止，已经发布了许多确定各种材料的热发射率的测试方法，但是估算红外温度计本身的虚拟发射率的方法并不普遍可用，用户必须依赖制造信息。但是，并非所有制造商都提供虚拟辐射率值以及其红外测温仪，因此需要将其用于特殊实验室工作的用户不得不寻找一种估算此量的方法。本文提出了一种估计虚拟发射率的方法描述了红外温度计。它基于比较方法，该方法使用两个不同发射率的精确黑体标准具，并加热到相同温度。红外测温仪反复测量每个标准具的温度，并通过图形-数字程序处理测量值的统计集合。分析了此过程的统计不确定性，结果表明，如果使用的设备可确保足够的精度，则结果的准确性是可以接受的。