4He interpolating constant-volume gas thermometry in the range 3.0 K to 24.5561 K
METROLOGIA(2010)
Abstract
The range 3.0 K to 24.5561 K of the International Temperature Scale of 1990 (ITS-90) was realized at VSL with a He-4 interpolating constant-volume gas thermometer (ICVGT). The standard uncertainty of the generated scale ranged from 0.32 mK at 3.3 K to 0.38 mK at 24.5561 K. The ICVGT scale was compared with the classical absolute gas thermometer scales of the National Physical Laboratory (NPL-75, 1975) and the Kamerlingh Onnes Laboratory (KOL, 1986) and was found to deviate from them by a maximum of 1.5 mK. The non-uniqueness of the generated scale was investigated by comparing it with alternative ICVGT scales (but having equal status because still satisfying all the requirements of the ITS-90) obtained from different choices of the lowest calibration temperature and interpolation function. The size of correction effects such as thermo-molecular pressure, aerostatic head pressure and dead volume was calculated and the effectiveness of the ICVGT calibration procedure in compensating for such correction effects was evaluated.
MoreTranslated text
Key words
satisfiability
AI Read Science
Must-Reading Tree
Example
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined