标准号：ISO 6145-2-2001
实施状态：作废
中文名称：气体分析 用动态容量法制备标定用混合气体 第2部分：容量泵
英文名称：Gas analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 2: Volumetric pumps
发布日期：2001-07-01
被替代标准：ISO 6145-2-2014
代替标准：ISO/DIS 6145-2-1999
采用标准：BS ISO 6145-2-2001,IDT;UNE 77243-2-2004,IDT
起草单位：ISO/TC 158
标准简介：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 commercially available multi-piston, volumetric pumps. Pumps of this type may be employed to prepare gas mixtures in which the volume fractions of the gaseous components in the complementary gas range from 0,1 % upwards; the relative expanded uncertainty of measure-ment, U, obtained by multiplying the relative combined standard uncertainty by a coverage factor k = 2 is not greater than 0,5 %.
Lower concentrations may be obtained by cascading volumetric pumps, and the lowest volume fraction achievable by means of a two-pump cascade is 10<up-6>. Moreover, if pre-mixed gases are used instead of pure gases, much lower concentrations can be obtained.
The merits of this method are that a large quantity of the gas mixture can be prepared on a continuous basis, and that multicomponent mixtures can also be readily prepared.
文件格式：PDF
文件大小：116.02KB
文件页数：16
（以上信息更新时间为：2019-11-23）
ISO 6145-2-2001 气体分析 用动态容量法制备标定用混合气体 第2部分：容量泵.pdf
(116.02 KB)
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