Abstract
This paper describes a linear-gradient furnace and a thermocouple homogeneity scanner that, together, measure changes in the Seebeck coefficient as a function of time and temperature. The furnace first exposes the test thermocouple to all temperatures in the range spanned by the furnace gradient. The homogeneity scanner then measures the Seebeck coefficient along the length of the thermocouple. By correlating the position on the thermocouple with the temperature in the furnace, changes in the Seebeck coefficient can be correlated with the temperature to which that part of the thermocouple was exposed. Repeat exposures for different durations allow the rapid accumulation of data describing drift versus temperature and time. The known profile of the furnace combined with the high resolution of the dual heat-pipe scanner enable the detection of Seebeck coefficient changes of less than 0.02 % over sub-millimeter distances. The high resolution of the scanner also minimizes the underestimation of short-range changes in the Seebeck coefficient. With the addition of other treatment processes, such as annealing, quenching, and cold work, the system can assess the full variety of reversible and irreversible effects in thermocouples. Preliminary experiments on base-metal thermocouples confirm much of the known long-term behavior. However, the system has also exposed the rapid onset of some of these effects at low temperatures, the large amount and variability of cold work in new thermocouples, and large variations between different thermocouples of the same type.
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References
F. Jahan, M. Ballico, Int. J. Thermophys. 28, 1832 (2007)
F. Jahan, M. Ballico, Int. J. Thermophys. 31, 1544 (2010)
R.E. Bentley, Theory and Practice of Thermoelectric Thermometry, 1st edn. (Springer, Singapore, 1998)
R.E. Bentley, Process. Control Eng. 39, 36 (1986)
R.E. Bentley, Measurement 23, 35 (1998)
R.P. Reed, in Temperature, Its Measurement and Control in Science and Industry, vol. 6, ed. by J.F. Schooley (American Institute of Physics, New York, 1992), pp. 525–530
R.P. Reed, in Temperature, Its Measurement and Control in Science and Industry, vol. 6, ed. by J.F. Schooley (American Institute of Physics, New York, 1992), pp. 518–524
R.L. Anderson, J.D. Lyons, T.G. Kollie, W.H. Christie, R. Eby, in Temperature, Its Measurement and Control in Science and Industry, vol. 5, ed. by J.F. Schooley (American Institute of Physics, New York, 1982), pp. 977–1007
A.W. Fenton, in Temperature, Its Measurement and Control in Science and industry, vol. 4, ed. by H.H. Plumb (Instrument Society of America, Pittsburgh, PA, 1972), pp. 1973–1990
R.E. Bentley, J. Phys. E 20, 1368 (1987)
W.P. White, Phys. Rev. (Series I) 23, 449 (1906)
K.R. Carr, in Temperature, Its Measurement and Control in Science and Industry, vol. 4, ed. by H.H. Plumb (Instrument Society of America, Pittsburgh, PA, 1972), pp. 1855–1866
E.S. Webster, Int. J. Thermophys. 35, 574 (2014)
R.M. Park, R.P. Reed, M.B. Herskovitz, T.P. Wang, D. MacKenzie, R.R. Desmaris, E.F. McGuire, G.W. Burns, F.B. Hall, L.L. Sparks, P. Bliss, Manual on the Use of Thermocouples in Temperature Measurement, 4th edn. (ASTM, Philadelphia, PA, 1993)
D.R. White, R.S. Mason, Int. J. Thermophys. 31, 1654 (2010)
K. Hill, D. Gee, in Proceedings of Ninth International Temperature Symposium (Los Angeles), Temperature: Its Measurement and Control in Science and Industry, vol. 8, ed. by C.W. Meyer, A.I.P. Conference Proceedings 1552 (AIP, Melville, NY, 2013), pp. 520–525
T.G. Kollie, J.L. Horton, K.R. Carr, M.B. Herskovitz, C.A. Mossman, Rev. Sci. Instrum. 46, 1447 (1975)
J. Tamba, K. Yamazawa, S. Masuyama, H. Ogura, M. Izuchi, Int. J. Thermophys. 32, 2436 (2011)
Y.A. Abdelaziz, F. Edler, Meas. Sci. Technol. 20, 1 (2009)
R.E. Bentley, Meas. Sci. Technol. 11, 538 (2000)
M. Holmsten, J. Ivarsson, R. Falk, M. Lidbeck, L.E. Josefson, Int. J. Thermophys. 29, 915 (2008)
E.A. Brandes, G.B. Brook (eds.), Smithells Metals Reference Book, 7th edn. (Butterworth Heinmann, Oxford, 1992)
H.W. Godbee, W.T.J. Ziegler, Appl. Phys. 37, 40 (1966)
G.W. Burns, M.G. Scroger, G.F. Strouse, M.C. Croarkin, W.F. Guthrie, NIST Monograph 175: Temperature-Electromotive Force Reference Functions and Tables for the Letter-Designated Thermocouple Types Based on the ITS-90 (U.S. Government Printing Office, Washington, DC, 1993)
Y.G. Kim, C.H. Song, K.S. Gam, I. Yang, Meas. Sci. Technol. 20, 1 (2009)
N.A. Burley, R.M. Hess, C.F. Howie, J.A. Coleman, in Temperature, Its Measurement and Control in Science and Industry, vol. 5, ed. by J.F. Schooley (American Institute of Physics, New York, 1982), pp. 1159–1166
T.P. Wang, C.D. Starr, in Temperature, Its Measurement and Control in Science and Industry, vol. 5, ed. by J.F. Schooley (American Institute of Physics, New York, 1982), pp. 1147–1157
E.H. McLaren, E.G. Murdock, in Temperature, Its Measurement and Control in Science and Industry, vol. 5, ed. by J.F. Schooley (American Institute of Physics, New York, 1982), pp. 953–975
R.L. Anderson, R.L. Ludwig, in Temperature, Its Measurement and Control in Science and Industry, vol. 5, ed. by J.F. Schooley (American Institute of Physics, New York, 1982), pp. 939–951
R.E. Bentley, J. Phys. D 22, 1908 (1989)
D.D. Pollock, D.I. Finch, in Temperature, Its Measurement and Control in Science and Industry, vol. 3, ed. by C.M. Herzfeld (Instrument Society of America, Pittsburgh, PA, 1962), pp. 237–241
R.E. Bentley, J. Phys. D 22, 1902 (1989)
N.A. Burley, in Temperature, ItsMeasurement and Control in Science and Industry, vol. 4, ed. by H.H. Plumb (Instrument Society of America, Pittsburgh, PA, 1972), pp. 1677–1695
N.A. Burley, J.L. Cocking, in Temperature, Its Measurement and Control in Science and Industry, vol. 5, ed. by J.F. Schooley (American Institute of Physics, New York, 1982), pp. 1129–1145
N.A. Burley, in Temperature, Its Measurement and Control in Science and Industry, vol. 6, ed. by J.F. Schooley (American Institute of Physics, New York, 1992), pp. 579–584
R.E. Bentley, in Temperature, Its Measurement and Control in Science and Industry, vol. 6, ed. by J.F. Schooley (American Institute of Physics, New York, 1992), pp. 591–594
R.W. McCulloch, J.H. Cliff, in Temperature, Its Measurement and Control in Science and Industry, vol. 5, ed. by J.F. Schooley (American Institute of Physics, New York, 1982), pp. 1097–1108
D.D. Pollock, in Temperature, Its Measurement and Control in Science and Industry, vol. 5, ed. by J.F. Schooley (American Institute of Physics, New York, 1982), pp. 1115–1120
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Webster, E.S., White, D.R. & Edgar, H. Measurement of Inhomogeneities in MIMS Thermocouples Using a Linear-Gradient Furnace and Dual Heat-Pipe Scanner. Int J Thermophys 36, 444–466 (2015). https://doi.org/10.1007/s10765-014-1810-2
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DOI: https://doi.org/10.1007/s10765-014-1810-2