ISO 14644-1:2015 4.2: Choose the threshold particle size or sizes within the permitted range

What does 4.2 require?

One or more threshold (lower limit) particle sizes, lying within the range from 0,1 micrometre up to 5 micrometres inclusive, are used to determine the particle concentration on which classification rests.

Maintained by Gerard Blokdyk

Other controls in Clause 4: Classification – ISO 14644-1:2015

4.1 Define the class for one or more occupancy states
4.3 Designate the class by its ISO Class number using the limit table
4.4 State the full designation: class, occupancy state and considered sizes, with a size ratio of at least 1,5
4.5 Use Annex E for intermediate decimal classes and intermediate size thresholds

Query this from an agent

The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.

MCP endpoint All ISO 14644-1:2015 controls