Language:
    • Available Formats
    • Options
    • Availability
    • Priced From ( in USD )
    • Printed Edition
    • Ships in 1-2 business days
    • $124.00
    • Add to Cart
    • Printed Edition + PDF
    • Immediate download
    • $191.00
    • Add to Cart

Customers Who Bought This Also Bought

 

About This Item

 

Full Description

ISO 6145-9:2009 is one of a series of International Standards dealing with various dynamic volumetric methods used for the preparation of calibration gas mixtures. This part specifies a method for continuous production of calibration gas mixtures containing one or more readily condensable components. A relative expanded uncertainty of measurement, U, obtained by multiplying the relative combined standard uncertainty by a coverage factor k = 2, of not greater than ± 1 %, can be obtained using this method.

Unlike the methods presented in the other parts of ISO 6145, the method described in this part does not require accurate measurement of flow rates since flow rates do not appear in the equations for calculation of the volume fraction.

Readily condensable gases and vapours commonly become adsorbed on surfaces, and it is therefore difficult to prepare stable calibration gas mixtures of accurately known composition, containing such components, by means of static methods. In addition, these calibration gas mixtures cannot be maintained under a pressure near the saturation limit without the occurrence of condensation. The saturation method can be employed to prepare mixtures of this type.

 

Document History

  1. ISO 6145-9:2009

    👀currently
    viewing


    Gas analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 9: Saturation method

    • Most Recent
  2. ISO 6145-9:2001


    Gas analysis -- Preparation of calibration gas mixtures using dynamic volumetric methods -- Part 9: Saturation method

    • Historical Version