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Division 3.3.4.2 Compliance with the requirements in paragraph 3.3.4.1. of this Sub-Annex may not be necessary if the CVS system is designed to inhibit condensation by such techniques, or combination of techniques, as:

Original text. Later amendments are not shown.

  1. (a)

    Reducing water content in the dilution air (dilution air dehumidification);

  2. (b)

    Heating of the CVS dilution air and of all components up to the diluted exhaust flow measurement device and, optionally, the bag sampling system including the sample bags and also the system for the measurement of the bag concentrations.

In such cases, the selection of the CVS flow rate for the test shall be justified by showing that condensation of water cannot occur at any point within the CVS, bag sampling or analytical system.