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Autor:
C. J. Elliott, O. Ongrai
Publikováno v:
International Journal of Thermophysics. 38
In 2015, NIMT first established a Co-C eutectic temperature reference (fixed-point) cell measurement capability for thermocouple calibration to support the requirements of Thailand’s heavy industries and secondary laboratories. The Co-C eutectic fi
Publikováno v:
International Journal of Thermophysics. 36:423-432
Thermocouples are generally calibrated using a series of standard fixed-point cells. However, thermocouples in use, particularly base metal and refractory thermocouples, exhibit significant calibration drift due to factors such as inhomogeneity growt
Publikováno v:
International Journal of Thermophysics. 31:1506-1516
The Pt/Pd thermocouple has demonstrated superior thermoelectric drift and homogeneity performance over conventional Pt–Rh/Pt thermocouples. Here, we present a systematic comparison of the drift and homogeneity performance of Pt/Pd and Type R thermo
Publikováno v:
Metrologia. 47:L1-L3
We report the development of a self-validating high temperature thermocouple, whereby a high temperature fixed point of metal?carbon eutectic alloy forms an integral part of the thermocouple measuring junction, permitting in situ calibration.
Publikováno v:
AIP Conference Proceedings.
Previous successful investigations of miniature cobalt-carbon (Co-C, 1324 °C) and palladium-carbon (Pd-C, 1492 °C) high temperature fixed-point cells for thermocouple self-calibration have been reported [1-2]. In the present work, we describe a ser
Publikováno v:
AIP Conference Proceedings.
Above 1500 °C, tungsten-rhenium (W-Re) thermocouples are the most commonly used contact thermometers because they are practical and inexpensive. However in general loss of calibration is very rapid, and, due to their embrittlement at high temperatur
Publikováno v:
Measurement Science and Technology. 22:105103
Reliable high-temperature (>1500 °C) measurement is crucial for a wide range of industrial processes as well as specialized applications, e.g. aerospace. The most common type of sensor used for high-temperature measurement is the thermocouple. At an
Publikováno v:
Measurement Science and Technology. 22:015104
Miniature fixed-point cells have been constructed using ingots of Co–C eutectic alloy, with the aim of constructing self-validating thermocouples for in situ calibration. The design consists of a cylindrical graphite crucible, diameter 6 mm, contai
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