Calibration of Radiation Thermometers and Blackbodies in the Temperature Range from 160℃ to 420℃

摘要

The NMIJ has established a new calibration facility consisting of a 1.6 μm radiation thermometer and three fixed-point blackbodies of indium (156.5985℃), tin (231.928℃), and zinc (419.527℃) in the temperature range from 160℃ to 420℃. The expanded uncertainties (k = 2) of the fixed-point blackbodies are estimated to be 28 mK for the In point, 22 mK for the Sn point, and 32 mK for the Zn point. The expanded uncertainties in the temperature scale of the 1.6 μm radiation thermometer are estimated to be 40 mK to 77 mK. When this standard is used to calibrate devices under test to be used in industry, uncertainties (k = 2) of 61 mK for the In point, 67mK for the Sn point, and 99 mK for the Zn point, 91 mK to 136mK for a 1.6 μm radiation thermometer, and 73 mK to 116 mK for a variable-temperature blackbody can be achieved.