UNE-EN ISO 14644-1:2016

Foreword
Introduction
1 Scope
2 Definitions
3 Classification
4 Demonstration of compliance
Annexes A (informative) Graphical illustration of the classes
                        of Table 1
Annexes B (normative) Determination of particulate
                      cleanliness classification using a
                      discrete-particle-counting,
                      light-scattering instrument
Annexes C (normative) Statistical treatment of particle
                      concentration data
Annexes D (informative) Worked examples of classification
                        calculations
Annexes E (informative) Considerations for the counting and
                        sizing of particles outside the size
                        range applicable for classification
Annexes F (informative) Sequential sampling procedure
Bibliography
Figures
A.1 - Graphical representation of ISO-class concentration
      limits for selected ISO classes
F.1 - Boundaries for pass or fail by the sequential
      sampling procedure
Tables
1 - Selected airborne particulate cleanliness classes for
      cleanrooms and clean zones
C.1 - Student's t distribution for the 95% upper confidence
      limit
F.1 - Upper and lower limits for time at which C observed
      counts should arrive

Covers the classification of air cleanliness in cleanrooms and associated controlled environments exclusive in terms of concentration of airborne particles. Particle populations having cumulative distributions based on threshold (lower limit) size range from 0,1 microns to 5 microns are considered for classification purposes. Cannot be used to characterize the physical, chemical, radiological, or viable nature of airborne particles.