Int. J. Metrol. Qual. Eng.
Volume 8, 2017
|Number of page(s)||6|
|Published online||30 January 2017|
Consistency of the national realization of dew-point temperature using NIS standard humidity generators
National Institute for Standards – NIS, Thermal Metrology Lab,
Tersa St., Elharam, El-Giza, P.O. 136,
⁎ Corresponding author: firstname.lastname@example.org
Accepted: 9 December 2016
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 . 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.
Key words: dew-point temperature / humidity / generators / uncertainty
© D.A. El-Galil and M.G. Ahmed, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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