Li Xumo et al 1982 Metrologia 18 203 doi:10.1088/0026-1394/18/4/004
Li Xumo, Zhang Jinde, Su Jinrong and Chen Deming
Show affiliationsA new type of high-temperature platinum resistance thermometer has been developed and tested. The thermometer with a strip-shaped support was designed in such a special way that the curvature of the platinum wire in a sensor is kept almost uniform, and thus the strain in the wire can be reduced to a minimum. The experiments, which have lasted for over 3 years, show that the stability of the thermometers is excellent. The average change in resistance of the thermometer at 0 °C was equivalent to about 1 mK for every 100 h of exposure to temperatures from 1070 °C to 1100 °C. The anneal time at 1100 °C required to achieve this stability was only 150 h. The changes of R0 are usually less than 1.0 mK equivalent after rapidly cooling from 1064 °C to ambient temperatures, followed by annealing at 650 °C for half an hour. The leakage resistance of these thermometers at 1064 °C is greater than 27 MΩ. It seems that the problem of fused silica devitrification can be solved.
Issue 4 (October 1982)
Received 31 March 1982
Li Xumo et al 1982 Metrologia 18 203
G T Clement and K Hynynen 2002 Phys. Med. Biol. 47 1219
S Hild et al 2007 Class. Quantum Grav. 24 1513
D S Broomhead et al 1987 J. Phys. A: Math. Gen. 20 L563
Patrick L T M Frederix et al 2005 Nanotechnology 16 997
Lennart Robertsson 2005 Metrologia 42 458
R Devonshire et al 2000 Meas. Sci. Technol. 11 547
S Gavrilov et al 1999 Nanotechnology 10 213
A Allisy 1995 Metrologia 31 467
Richard Davis 2003 Metrologia 40 299