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Comparisons of Co–C and Pd–C Eutectic-Point Cells for Thermocouple Calibration Between NMIA and NMIJ

  • H. OguraEmail author
  • F. Jahan
  • K. Yamazawa
TEMPMEKO 2016
  • 145 Downloads
Part of the following topical collections:
  1. TEMPMEKO 2016: Selected Papers of the 13th International Symposium on Temperature, Humidity, Moisture and Thermal Measurements in Industry and Science

Abstract

Comparisons between NMIA and NMIJ on the melting temperatures of the Co–C eutectic point and the Pd–C eutectic point were performed using an NMIJ high-temperature furnace. The eutectic-point cells were constructed by NMIA and NMIJ following two different specifications. NMIA designed two miniature crucibles, one for Co–C and one for Pd–C eutectic-point cells. NMIJ designed larger eutectic-point cells, one for Co–C and one for Pd–C eutectic-point cells. Prior to performing the comparisons, the effect of conductive heat flow through the thermocouple stem was evaluated during the melting. The comparisons of the Co–C eutectic-point cells and of the Pd–C eutectic-point cells were performed using types R, B and Pt/Pd thermocouples. Despite the different cell designs and different material sources, the melting temperatures of the Co–C and Pd–C eutectic-point cells under investigation agreed within 0.1 \(\,{^{\circ }}\hbox {C}\).

Keywords

Calibration Co–C eutectic point Pd–C eutectic point Thermocouple 

Notes

Acknowledgements

The authors thank Y. Huang (NMIJ) and M. Izuchi (NMIJ), for valuable assistance with the Ag fixed point measurements, and the inhomogeneity measurements using the water heat-pipe furnace in NMIJ.

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.National Metrology Institute of JapanNational Institute of Advanced Industrial Science and Technology (NMIJ, AIST)TsukubaJapan
  2. 2.National Measurement InstituteSydneyAustralia
  3. 3.National Institute of Technology and EvaluationShibuya-ku, TokyoJapan

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