This annex describes methodology for carrying out performance requirement tests for the characteristics listed in
the methodology described in BS EN 15267-3 shall be followed, except only one rise time is required to determine the T90 value.
analyser models that have been certified under MCERTS will, as a requirement, report valve around zero.
The detection limit shall be determined for the determinand by making at least 10 repeat measurements of zero gas recording 10 determined concentrations.