This part of ISO 6145 specifies a method for the continuous production of calibration gas mixtures, containing two or more components, from pure gases or other gas mixtures by use of critical orifice systems. By selection of appropriate combinations of orifices and with the use of pure gases, the volume fraction of the calibration component in the calibration gas mixture can be varied by a factor of 104 . Additionally, it can be changed by a factor of 102 by changing the initial pressures in the orifice systems. The uncertainty of the method depends mainly upon the flow calibration method and the variations in temperature and outlet pressure. The relative e
DS/EN ISO 6145-6-2008由丹麦标准化协会 DK-DS 发布于 2008-11-05,并于 2008-11-05 实施。
DS/EN ISO 6145-6-2008在国际标准分类中归属于: 71.040.40 化学分析。
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