산업용 백금저항온도센서의 결선방식에 따른 측정불확도 평가방법
Uncertainty assessment of industrial platinum resistance thermometers for different lead-wire connection methods
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To estimate the measurement uncertainty for industrial platinum resistance thermometers(IPRTs) made with 3-wire connection, the immersion temperature profile was investigated using a liquid bath. Two types of IPRTs having lead wires made of silver and nickel were constructed and the immersion profiles were measured at temperatures from −50℃ to 250℃ using 3-wire and 4-wire method. As immersion depth and temperature increased, the resistances measured by 3-wire method increased linearly but not for 4-wire method. To calibrate a 3-wire IPRT, the immersion effect must be accounted for. We propose a linear equation to assess correctly the measurement uncertainty.
Abstract
To estimate the measurement uncertainty for industrial platinum resistance thermometers(IPRTs) made with 3-wire connection, the immersion temperature profile was investigated using a liquid bath. Two types of IPRTs having lead wires made of silver and nickel were constructed and the immersion profiles were measured at temperatures from −50℃ to 250℃ using 3-wire and 4-wire method. As immersion depth and temperature increased, the resistances measured by 3-wire method increased linearly but not for 4-wire method. To calibrate a 3-wire IPRT, the immersion effect must be accounted for. We propose a linear equation to assess correctly the measurement uncertainty.
참고문헌 (7)
- "Techniques for approximating the international temperature scale of 1990, BIPM", ~ (2005)
- P.Marcarino, "Proposal:new reference functions for industrial platinum resistance thermometers", TEMPMEKO 2004, 통권 : 2, pp.807~812 (2004)
- T.Weckstrom, "Pt-100 thermometers and the ITS- 90", TEMPMEKO 2004, 통권 : 2, pp.813~816 (2004)
- "산업용 저항온도계 표준교정절차서, KASTO 03- 50106-077, 한국계량측정협회", ~ (2003)
- "Smithells Metals Reference Book, 8th edition" (2004), Elsevier Butterworth-Heinemann
- H. Preston-Thomas, "The International Temperature Scale of 1990 (ITS-90)", Metrologia, 27, pp.3~10 (1990)
- "측정불확도 표현지침, KRISS-98-096-SP, 한국표준 과학연구원", ~ (1998)