Uncertainty analysis of evaporation rate in magnetic suspension balance/diffusion-tube humidity generator

被引：11

作者：

Abe, H. ^{[1
]}

Tanaka, H. ^{[1
]}

Kitano, H. ^{[1
]}

机构：

[1] AIST, NMIJ, Tsukuba, Ibaraki 3058563, Japan

来源：

INTERNATIONAL JOURNAL OF THERMOPHYSICS | 2008年 / 29卷 / 05期

关键词：

calibration gas; cavity ring-down spectroscopy; gas standard; humidity standard; trace moisture;

D O I：

10.1007/s10765-007-0350-4

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

An analysis method for the uncertainty of a small evaporation rate in a magnetic suspension balance/diffusion-tube humidity generator has been developed. Using experimentally obtained data, the uncertainty is evaluated as a function of measurement time. It is found that the observed standard deviation of the evaporation rate in a region of short measurement time (short term) is inversely proportional to the measurement time, and that in a region of long measurement time (long term) the standard deviation does not vary markedly with increasing measurement time. The behavior of the observed standard deviation in the short term is attributable mainly to the uncertainty of the balance reading, and that in the long term to the variability of room temperature. The results of the investigation show that the use of only least-squares analysis leads to underestimation of the uncertainty.

引用

页码：1555 / 1566

页数：12

共 14 条

[1] Development of humidity standard in trace-moisture region: Characteristics of humidity generation of diffusion tube humidity generator [J].