초정밀 온도센서의 저온 영역 교정 장치 개발
Development of the calibration system for very accurate thermometers at low temperatures
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초록
For the accurate calibrations of thermometers at low temperatures, triple points of oxygen and argon have been realizedusing sealed-type triple point cells. The triple points were realized with both adiabatic and continuous heating methods.The resistance of thre capsule-type standard platinum resistance thermometers were measured at the triple points ofoxygen, argon, mercury and water for the calibrations of these thermometers in the range from 220oC to 0.01oC. Theextended uncertainty, with the coverage factor of 2, of the calibration in this range is smaller than 1 mK.
Abstract
For the accurate calibrations of thermometers at low temperatures, triple points of oxygen and argon have been realizedusing sealed-type triple point cells. The triple points were realized with both adiabatic and continuous heating methods.The resistance of thre capsule-type standard platinum resistance thermometers were measured at the triple points ofoxygen, argon, mercury and water for the calibrations of these thermometers in the range from 220oC to 0.01oC. Theextended uncertainty, with the coverage factor of 2, of the calibration in this range is smaller than 1 mK.
참고문헌 (6)
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- F. Pavese, "An international intercomparison of fixed points by means of sealed cells in the range 13.81 K - 90,686 K", Metrologia, 20(4), pp.127~144 (1984)
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- 강기훈, "핵심국제비교용 무의 삼중점 셀 제작과 비교 실험 및 불확도 평가", 센서학회지, 13(2), pp.114~120 (2004), 한국센서학회
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