This document explains the use of the two acceptable methods of reporting particle size, µm(c) and µm(b), that are defined in ISO 11171:2016. It also explains the reasons for the existence of two alternative size reporting methods and its implications with respect to particle count and filter Beta Ratio data.
Status : PublishedPublication date : 2019-09
Edition : 1Number of pages : 8
Technical Committee:Contamination control
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