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Establishment of Comparison Calibration Equipment for Infrared-radiation Thermometers Below ℃

℃ 이하 적외선 복사온도계 비교 교정장치 구축

  • 유용심 (한국표준과학연구원 물리표준본부) ;
  • 김봉학 (한국표준과학연구원 물리표준본부)
  • Received : 2018.01.07
  • Accepted : 2018.03.12
  • Published : 2018.04.25

Abstract

Comparison calibration equipment for infrared-radiation thermometers below $0^{\circ}C$ has been established, using a TRT2 (transfer radiation thermometer 2, HEITRONICS) as a transfer standard and an ME30 (Model: ME30, HEITRONICS) as a variabletemperature blackbody. The TRT2 was calibrated using three fixed points (Ice ($0.01^{\circ}C$), In ($156.5985^{\circ}C$), and Sn ($231.928^{\circ}C$)) and the Planckian Sakuma-Hattori equation, and including the interpolation and extrapolation errors at $-50^{\circ}C$ in the uncertainty. The pneumatic lid is installed upon opening of the ME30 and is opened for only 30 seconds for measuring the radiation temperature, which prevents formation of ice in the ME30 and also reduces the calibration time to half. The farther away from the $0{\sim}232^{\circ}C$ region, the larger the uncertainty of the comparison calibration equipment becomes. The expanded uncertainty of the comparison calibration equipment was estimated as 0.26 K at $-20^{\circ}C$.

Acknowledgement

Grant : 기반측정표준확립 및 교정측정능력 선진화

Supported by : 한국표준과학연구원

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