ISO INTERNATIONAL STANDARD 14644-1 Second edition 2015-12-15 Cleanrooms and associated controlled environments - Part 1: Classification of air cleanliness by particle concentration Salles propres et environnements maitrisés apparentés - Partie 1: Classification de la propreté particulaire de I'air Reference number ISO 14644-1:2015(E) ISO @ IS0 2015 IS0 14644-1:2015(E) .6781248-LfNr.7332461001-2016-01-1217:32 COPYRIGHTPROTECTEDDOCUMENT IS02015,PublishedinSwitzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. IsOcopyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel.+41 22 749 0111 Fax+41227490947 copyright@iso.org www.iso.org i @ IS0 2015 - All rights reserved IS0 14644-1:2015(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references ..1 3 Terms and definitions ..1 3.1 General .1 3.2 Airborne particles .2 3.3 Occupancy states 3 3.4 Testing instrumentation (see Annex F) .3 3.5 Instrument specifications 4 4 Classification .4 4.1 Occupancy state(s) .4 4.2 Particle size(s) 4 4.3 ISO Class number ..4 4.4 Designation .5 4.5 Intermediate decimal cleanliness classes and particle size thresholds .5 5 Demonstration of compliance .6 5.1 Principle. .6 5.2 Testing. ..6 5.3 Airborne particle concentration evaluation 5.4 Test report ..6 Annex A (normative) Reference method for classification of air cleanliness by particle concentration Annex B (informative) Examples of classification calculations ..13 Annex C (informative) Counting and sizing of airborne macroparticles ..22 Annex D (informative) Sequential sampling procedure ..27 Annex E (informative) Specification of intermediate decimal cleanliness classes and particle size thresholds ..34 GmbH-KdNr.6781248-LfNr.7332461001-2016-01-12 17:32 Annex F (informative) Test instruments .36 Bibliography .37 Normen-Download-Beuth-gempex @ IS0 2015 - All rights reserved iii