Consistency of the national realization of dew-point temperature using NIS standard humidity generators

A comparison of two standard humidity generators (two-temperature (2-T) and one-temperature (1-T) generators) that are developed by the National Institute for Standards (NIS) has been performed using a transfer standard chilled-mirror hygrometer and measurement procedures to realize dew-point temper...

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Bibliographic Details
Published inInternational journal of metrology and quality engineering Vol. 8; p. 1
Main Authors El-Galil, Doaa Abd, Ahmed, M.G.
Format Journal Article
LanguageEnglish
Published Les Ulis EDP Sciences 2017
Subjects
Calibration
Consistency
Dew
dew-point temperature
Gases
Generators
Heat
Humidity
Resistance thermometers
Temperature gradients
Uncertainty
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Summary:A comparison of two standard humidity generators (two-temperature (2-T) and one-temperature (1-T) generators) that are developed by the National Institute for Standards (NIS) has been performed using a transfer standard chilled-mirror hygrometer and measurement procedures to realize dew-point temperature Td in the range from −50 °C to 0 °C. The main objective of this comparison was to compare the realizations of dew-point temperature and to establish the level of consistency between the two generators. For a level of consistency between two measurements, it is expressed by the difference between the measured values, m1 − m2, and the expanded pair uncertainty of this difference Up [1]. The comparison measurements revealed dew-point temperature differences of 0.02 °C and 0.07 °C with expanded pair uncertainties of ±0.09 °C and ±0.15 °C.
ISSN:2107-6847
2107-6839
2107-6847
DOI:10.1051/ijmqe/2016028