Cookies
We need your consent to use the individual data so that you can see information about your interests, among other things. Click "OK" to give your consent.
ČSN EN ISO 6145-6 (385615)
Gas analysis - Preparation of calibration gas mixtures using dynamic methods - Part 6: Critical flow orifices
Translate name
STANDARD published on 1.10.2018
The information about the standard:
Designation standards: ČSN EN ISO 6145-6
Classification mark: 385615
Catalog number: 505367
Publication date standards: 1.10.2018
SKU: NS-898698
The number of pages: 40
Approximate weight : 120 g (0.26 lbs)
Country: Czech technical standard
Category: Technical standards ČSN
The category - similar standards:
Annotation of standard text ČSN EN ISO 6145-6 (385615):
This document specifies a method for the dynamic preparation of calibration gas mixtures containing at least two gases (usually one of them is a complementary gas) from pure gases or gas pre-mixtures using critical flow orifices systems. The method applies principally to the preparation of mixtures of non-reactive gases that do not react with any of the materials forming the gas circuit inside the critical flow orifices system or auxiliary equipment. It has the merit of allowing multi-component mixtures to be prepared as readily as binary mixtures if an appropriate number of critical flow orifices are used. By selecting appropriate combinations of critical flow orifices, a dilution ratio of 1 × 104 is achievable. Although it is more particularly applicable to the preparation of gas mixtures at atmospheric pressure, the method also offers the possibility of preparing calibration gas mixtures at pressures greater than atmospheric. The upstream pressure will need to be at least two times higher than downstream pressure. The range of flow rates covered by this document extends from 1 ml/min to 10 l/min
