Realization of Relative Humidity Scale Using NIS Two-Temperature Humidity Generator  

作　　者：Mohamed Gamal Ahmed Said Mazen Doaa Abd El-Gelil Nabila Ismail El Sayed 

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》2014年第8期484-487,共4页物理科学与应用（英文版）

摘　　要：A new humidity calibration facility using a 2-T （two-temperature）, constant pressure principle for generating gas of known humidity has been developed at NIS for primary realization of relative humidity scale in the range from 13% to 98% for calibrating and testing hygrometers to improve the uncertainty. This paper reports the construction of the 2-T humidity generator describing its saturator and the test chamber system. Results of the efficiency tests of its saturator showed satisfactory generation performance for a primary realization of relative humidity scale. The expanded uncertainty of the relative humidity with a coverage factor k = 2 was found to be from ± 0.25 % to ± 0.67%.

关 键 词：Calibration relative humidity GENERATOR SATURATOR uncertainty. 

分 类 号：TB657.9[一般工业技术—制冷工程] TH837[机械工程—仪器科学与技术]