Presentation Information
[24p-12C-1][The 55th Young Scientist Presentation Award Speech] A Study on Uncertainty Analysis for Hygrometer Calibration with the Two-Pressure High Humidity Generator
〇Naoya Ishiwata1, Hisashi Abe1 (1.AIST)
Keywords:
humidity,uncertainty,calibration
The accuracy of humidity measurement has recently become necessary in various applications such as automobile manufacturing. To meet this need requires primary humidity standards to accurately calibrate hygrometers used in such applications. The primary standard in the dew-point range of -10 ℃ to 95 ℃ was established in Japan almost 20 years ago by developing a high humidity generator. Although the standard uncertainty in the hygrometer calibration was estimated from 15 mK to 45 mK at that time, there was the possibility of reducing it. For instance, stability and reproducibility of hygrometers under calibration were considered to decrease with the data accumulated after the analysis. In this study, we revisited the uncertainty analysis for the calibration of dew-point hygrometers with the high humidity generator to investigate the possibility of reducing the uncertainty and to understand the dominant uncertainty components. The standard uncertainty in calibration of dew-point hygrometers estimated in this study was 10 mK or less in the entire generation range, which was less than half of that evaluated previously.