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: ISO/TC 131/SC 6 Contamination control
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