Transactions of the Society of Instrument and Control Engineers
Online ISSN : 1883-8189
Print ISSN : 0453-4654
ISSN-L : 0453-4654
Nonuniqueness of the IPTS-68 in the Range from 0°C to 420°C
Nobuaki TAKIYA, Masaru ARAI, Shigeaki SAWADA, Hirohisa SAKURAI
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Keywords: IPTS-68, temperature scale, nonuniqueness, platinum resistance thermometer
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1989 Volume 25 Issue 8 Pages 907-909

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Abstract
The nonuniqueness of the IPTS-68 is experimentally estimated in the range from 0°C to 420°C using three standard platinum resistance thermometers and three secondary reference points. The maximum nonuniqueness is found to be less than 0.5mK below 200°C and 1.5mK below 420°C.
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