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The methods can therefore be used both to determine a CPC calibration factor to be applied across the range of larger particle sizes where the detection efficiency is relatively constant (the plateau efficiency), and to characterize the drop in CPC detection efficiency at small particle sizes, near the lower detection limit. These parameters are described in more detail in Annex A.
The methods are suitable for CPCs whose inlet flows are between approximately 0,1 l/min and 5 l/min.
This International Standard describes a method for estimating the uncertainty of a CPC calibration performed according to this International Standard.