International Journal of Metrology and Quality Engineering | |
Extending dew-point temperature scale up to +50 °C | |
Doaa Mohamed Abd El-Gelil1  Mohamed Gamal Ahmed1  | |
[1] National Institute of Standard, Giza, Egypt | |
关键词: International Journal; Metrology; Quality Engineering; IJMQE; EDP Sciences; | |
DOI : 10.1051/ijmqe/2018017 | |
学科分类:工程和技术(综合) | |
来源: EDP Sciences | |
【 摘 要 】
Extension of dew-point temperature scale has been performed using a two-temperature (2-T), constant pressure humidity generator that is developed for the first time by the National Institute of Standard (NIS) in order to extend the calibration capabilities to the high dew-point temperature range at NIS. It relies on the saturation of a stream of gas flowing over a water surface maintained at constant, well-known, temperature. In this paper, primary realization of dew-point temperature scale in a dew-point temperature range up to +50 °C was performed to extend calibration capabilities and to improve the uncertainties of the dew-point temperature scale realization. Several experiments were carried out in order to characterize the generator. Characterization comprises studies of the saturator efficiency, temperature stability and a comparison with a calibrated chilled-mirror hygrometer. The results of the efficiency tests showed good performance of the generator. For uncertainty of measurements, a thorough analysis was also described representing estimations of contributions for all the sources that possibly affect measurements.
【 授权许可】
CC BY
【 预 览 】
Files | Size | Format | View |
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RO201904025751938ZK.pdf | 1028KB | download |