The CMA humidity standard

Martti Heinonen

doi:10.1016/0263-2241(96)00026-7

The CMA humidity standard

Martti Heinonen

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10 Citations (Scopus)

Abstract

A two-temperature humidity generator has been developed at the Centre for Metrology and Accreditation (CMA) in order to have a reliable humidity standard. The system has been tested and the analysis of uncertainty has been carried out. The disturbance of the saturation equilibrium, the accuracy of temperature measurements, pressure differences, leaks, desorption and contamination have been investigated. The measurement range of the system is from -40 to +60°C with an uncertainty of less than ±0.25°C (k = 2). The system was found suitable to be used as the CMA humidity standard.

Original language	English
Pages (from-to)	183-188
Number of pages	6
Journal	Measurement
Volume	17
Issue number	3
DOIs	https://doi.org/10.1016/0263-2241(96)00026-7
Publication status	Published - 1 Jan 1996
MoE publication type	A1 Journal article-refereed

Keywords

Analysis of uncertainty
Dew-point
Humidity standard
Saturation

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10.1016/0263-2241(96)00026-7

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AB - A two-temperature humidity generator has been developed at the Centre for Metrology and Accreditation (CMA) in order to have a reliable humidity standard. The system has been tested and the analysis of uncertainty has been carried out. The disturbance of the saturation equilibrium, the accuracy of temperature measurements, pressure differences, leaks, desorption and contamination have been investigated. The measurement range of the system is from -40 to +60°C with an uncertainty of less than ±0.25°C (k = 2). The system was found suitable to be used as the CMA humidity standard.

KW - Analysis of uncertainty

KW - Dew-point

KW - Humidity standard

KW - Saturation

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The CMA humidity standard

Abstract

Keywords

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