Interpolation of Platinum Resistance Thermometers, 20° to 273.15°K
- 1 June 1960
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 31 (6), 637-640
- https://doi.org/10.1063/1.1931274
Abstract
A numerical method for interpolating the resistance-temperature relation of a platinum resistance thermometer is given. Calibration at three points such as 20°, 90°, and 273°K is required. The interpolation is then carried out by reference to the complete resistance-temperature relations of two other slightly different thermometers. Limited tests suggest that it is possible to achieve a temperature scale in this way using commercially available thermometers that is reproducible within 0.001 deg, provided the Callendar-van Dusen constants and the residual resistance ratio are sufficiently restricted.Keywords
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