NIS One-Temperature Dew-Point Generator Operating in the Ranae -50℃ to 0 ℃  

作　　者：Mohamed Gamal Ahmed Doaa Abd El-Gelil Essam El-Din Mahmoud Said Mazen 

机构地区：[1]National Institute for Standard, Giza, Egypt [2]Physics Department, Faculty of Science, Zagazig University, Sharkia, Egypt

出　　处：《Journal of Physical Science and Application》2012年第9期335-339,共5页物理科学与应用（英文版）

摘　　要：This paper describes construction and characterization of a dew/frost -point generator developed at national institute for standards. It is intended to operate in the range from -50 ℃to 0 ℃. The air flows through a saturator controlled by a regulated flow meter. The reference dew/frost -point temperature was measured by standard platinum resistance thermometer （SPRT） connected to a resistance bridge. A comparative study between the saturator temperature of the new generator measured by SPRT and the dew/frost-point temperature of a calibrated chilled-mirror hygrometer was conducted. It helped to determine the uncertainty of saturator; this uncertainty was found to be between ±0.06℃ to -4- 0.15℃ at confidence limit of 95%.Several experiments were carried out in the mentioned range. Obtained results gave the confidence that NIS generator could be used as a primary humid air generator.

关 键 词：Characterization standard dew/frost point generator measurement uncertainty. 

分 类 号：TH811[机械工程—仪器科学与技术] TU834.84[机械工程—精密仪器及机械]