Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Development of the calibration system for very accurate thermometers at low temperatures

초정밀 온도센서의 저온 영역 교정 장치 개발

  • Yang, In-Seok (Division of Physical Metrology, Korea Research Institute of Standards and Science) ;
  • Song, Chang-Ho (Division of Physical Metrology, Korea Research Institute of Standards and Science) ;
  • Kang, Kee-Hoon (Division of Physical Metrology, Korea Research Institute of Standards and Science) ;
  • Kim, Yong-Gyoo (Division of Physical Metrology, Korea Research Institute of Standards and Science)
  • 양인석 (한국표준과학연구원 기반표준본부) ;
  • 송창호 (한국표준과학연구원 기반표준본부) ;
  • 강기훈 (한국표준과학연구원 기반표준본부) ;
  • 김용규 (한국표준과학연구원 기반표준본부)
  • Published : 2008.05.31
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Abstract

For the accurate calibrations of thermometers at low temperatures, triple points of oxygen and argon have been realized using sealed-type triple point cells. The triple points were realized with both adiabatic and continuous heating methods. The resistance of three capsule-type standard platinum resistance thermometers were measured at the triple points of oxygen, argon, mercury and water for the calibrations of these thermometers in the range from $-220^{\circ}C$ to $0.01^{\circ}C$. The extended uncertainty, with the coverage factor of 2, of the calibration in this range is smaller than 1 mK.

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References

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