ISO INTERNATIONAL STANDARD 8573-4 Second edition 2019-02 Compressed air Contaminant measurement - Part 4: Particle content Air comprimé - Mesurage des polluants - Partie 4: Teneur en particules Reference number IS0 8573-4:2019(E) [so @IS02019 IS0 8573-4:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS0 8573-4:2019(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions 4 Units. ..2 5 Reference conditions .2 6 Particle type .2 6.1 General .2 6.2 Liquid particles .2 6.3 Solid particles. 3 6.3.1 General .3 6.3.2 Microbiological particles .3 7 Selection of method 3 7.1 General .3 7.2 Sampling on sampling disc surface in conjunction with a microscope .3 7.3 Sampling using particle sizing and counting instruments .4 7.3.1 General 4 7.3.2 Instrumentselection .4 7.3.3 Instrument calibration 4 7.3.4 Coincidence and dilution 4 8 Sampling techniques .5 8.1 General, ..5 8.2 Full flow sampling .5 8.3 Partial flow sampling .5 9 Evaluation of test results .6 9.1 Influence of humidity, temperature and pressure. .6 9.2 Number concentration 10 Test report ..6 Annex A (informative) Example test report on determination of particle content in compressed air ..8 Annex B (informative) Description of measurement methods and particle sizing ..10 Annex C (informative) Full flow sampling ..14 Annex D (informative) Isokinetic sampling ..17 Annex E (informative) Compressed air diffuser ..2 Annex F (informative) Particle concentration dilution ..24 Bibliography .26 @ IS0 2019 - All rights reserved iii