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recalibration of Leeds & Northrup Company G-2 Mueller bridge, serial no. 1603629 and redetermination of the ice point resistance of Leeds & Northrup Company platinum resistance thermometer, serial no. 1586182
by Ted C. Briggs
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An internally consistent Mueller bridge and a reliable value of the ice point resistance are required for the accurate determination of temperatures with a platinum resistance thermometer. The decade steps of Mueller bridge, serial No. 1603629 were intercompared and the resistance of a standard resistor was measured. The triple point resistance of platinum resistance thermometer, serial No. 1586182 was measured in a commercial triple point of water cell. From these measurements, corrections for each dial reading of the bridge were tabulated, and the ice point resistance of the platinum resistance thermometer was computed.
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"January 1970."
"Fundamental Research Branch, Project 7005."
Includes bibliographical references.
Also available online via Internet Archive.
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Twenty-two compressibility runs were made with helium over the temperature range -5℗ʻ to 80 ℗ʻ Celsius and at pressures to 800 atmospheres. A Burnett apparatus was used. Data from the runs were fitted to a fourth degree polynomial equation in the pressure and weighting factor of Pŕ℗đ/́þ was used. All data for a particular isotherm were treated simultaneously.
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