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http://dx.doi.org/10.5369/JSST.2005.14.6.381

Phase transition features of binary Co-C eutectic temperature fixed-point  

Kim, Yong-Gyoo (Temperature-Humidity Group, Div. of Physical Metrology, Korea Research Institute of Standards and Science (KRISS))
Yang, In-Seok (Temperature-Humidity Group, Div. of Physical Metrology, Korea Research Institute of Standards and Science (KRISS))
Gam, Kee-Sool (Temperature-Humidity Group, Div. of Physical Metrology, Korea Research Institute of Standards and Science (KRISS))
Publication Information
Journal of Sensor Science and Technology / v.14, no.6, 2005 , pp. 381-386 More about this Journal
Abstract
A Co-C eutectic cell for thermocouple calibration was manufactured and tested to investigate its phase transition characteristics using Type B thermocouples. It was observed that the freezing plateaus were flatter than those of melting, but the melting points were closer to the true transition temperature than the freezing points. The expanded uncertainty of melting temperature was calculated not to exceed $0.2^{\circ}C$ (k = 2). Based on the observed results, the melting process is recommended for the calibration of thermocouples.
Keywords
Co-C eutectic; fixed-point; thermocouple; melting temperature;
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