Self-Validating Type C Thermocouples to 2300 °C Using High Temperature Fixed Points

被引：14

作者：

Pearce, J. V. ^{[1
]}

Elliott, C. J. ^{[1
]}

Machin, G. ^{[1
]}

Ongrai, O. ^{[1
]}

机构：

[1] Natl Phys Lab, Teddington TW11 0LW, Middx, England

来源：

TEMPERATURE: ITS MEASUREMENT AND CONTROL IN SCIENCE AND INDUSTRY, VOL 8 | 2013年 / 1552卷

关键词：

Thermocouple; self-validation; self-calibration; metal-carbon eutectic; fixed point; HTFP; COBALT-CARBON; CELLS; THERMOMETERS; EUTECTICS;

D O I：

10.1063/1.4821396

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Above 1500 degrees 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 temperature, it is generally not possible to remove them for recalibration from the process environments in which they are used. Even if removal for recalibration was possible this would be of, at best, very limited use due to large inhomogeneity effects. Ideally, these thermocouples require some mechanism to monitor their drift in-situ. In this study, we describe self-validation of Type C (W5%Re/W26%Re) thermocouples by means of miniature high temperature fixed points comprising crucibles containing respectively Co-C, Pt-C, Ru-C, and Ir-C eutectic alloys. An overview of developments in this area is presented.

引用

页码：595 / 600

页数：6

共 33 条

[1] Anderson T.M., 1972, 4TH TEMPERATURE SYMP, P1735
[2] [Anonymous], ASTM E988
[3] Augustin S., 2001, 8th International Symposium on Temperature and Thermal Measurements in Industry and Science (TEMPMEKO 2001), P3
[4] Bernhard Frank, 2007, Proceedings of the Estonian Academy of Sciences (Engineering), V13, P320
[5] Brixy H., 1994, EXPERIMENTAL TECHNIQ, V40
[6] Droege J.W., 1972, Temperature: Its Measurement and Control in Science andIndustry ,vol, V4, P1767
[7] A cobalt-carbon eutectic fixed point for the calibration of contact thermometers at temperatures above 1100°C
Edler, F
Baratto, AC
[J]. METROLOGIA, 2005, 42 (04) : 201 - 207
[8] Material Problems in Using High-Temperature Thermocouples
Edler, F.
[J]. INTERNATIONAL JOURNAL OF THERMOPHYSICS, 2011, 32 (7-8) : 1418 - 1428
[9] Investigation of Co-C cells to improve thermocouple calibration
Edler, F.
Morice, R.
Ogura, H.
Pearce, J.
[J]. METROLOGIA, 2010, 47 (01) : 90 - 95
[10] Self-testable industrial platinum resistance thermometers integrated with miniature mercury and indium fixed-point cells
Kang, Kee Hoon
Kim, Yong-Gyoo
Gam, Kee Sool
Yang, Inseok
[J]. MEASUREMENT SCIENCE AND TECHNOLOGY, 2007, 18 (09) : 3005 - 3008

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