Name: UNI EN ISO 6145-4 : 2009
Brand: UNI

GAS ANALYSIS - PREPARATION OF CALIBRATION GAS MIXTURES USING DYNAMIC VOLUMETRIC METHODS - PART 4: CONTINUOUS SYRINGE INJECTION METHOD

Published date

22-01-2009

Publisher

Ente Nazionale Italiano di Unificazione (UNI)

1 Scope
2 Normative references
3 Principle
4 Application to preparation of gas mixtures
  4.1 Description of the experimental procedure
  4.2 Area of validity
  4.3 Operating conditions
5 Expression of results
  5.1 Volume fraction
  5.2 Sources of uncertainty
  5.3 Uncertainty of volume fraction
Annex A (informative) - Pre-mixed gases for preparation
        of mixtures of high dilution
Annex B (informative) - Example of apparatus for
        preparation of calibration gas mixtures
Annex C (informative) - Practical hints
Annex D (informative) - Example of the determination
        of the uncertainty in the concentration of
        a calibration gas mixture prepared by the
        continuous injection method
Bibliography

Describes a method for continuous production of calibration gas mixtures, containing two or more components, from pure gases or other gas mixtures by continuous injection of the calibration component(s) into a complementary gas stream by means of a syringe.

Committee	CT 101
DocumentType	Standard
PublisherName	Ente Nazionale Italiano di Unificazione (UNI)
Status	Current

Standards	Relationship
ISO 6145-4:2004	Identical
EN ISO 6145-4:2008	Identical

ISO/IEC Guide 98:1993	Guide to the expression of uncertainty in measurement (GUM)
ISO 6145-7:2009	Gas analysis Preparation of calibration gas mixtures using dynamic volumetric methods Part 7: Thermal mass-flow controllers
ISO 6143:2001	Gas analysis — Comparison methods for determining and checking the composition of calibration gas mixtures
ISO 7504:2015	Gas analysis Vocabulary
ISO 6145-1:2003	Gas analysis Preparation of calibration gas mixtures using dynamic volumetric methods Part 1: Methods of calibration