ISO INTERNATIONAL STANDARD 8573-3 First edition 1999-06-01 Compressed air - Part 3: Test methods for measurement of humidity Air comprimé - Partie 3: Methodes d'essai pour mesurer le taux d'humidité AA ... ISO Reference number ISO 8573-3:1999(E) ISO 8573-3:1999(E) Contents 1 Scope 2 Normative references.. 3 Terms and definitions 4 Units 5 Selection guide and available methods... 6 Sampling techniques 7 Measurement methods. 8 Evaluation of test results, 9 Conversions from non-standard humidity units to standard format and vice versa 10 Uncertainty 11 Expression of results 12 Test report AnnexA (informative)Exampleof compressedair humidity statement. Annex B (informative) Calculation of vapour pressure Annex C (informative) Preferred methods of humidity measurement Annex D (informative) Non-preferred methods of humidity measurement . 13 Bibliography 4 @ISO1999 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. InternationalOrganizationforStandardization Casepostale56.CH-1211Geneve20Switzerland Internet [email protected] Printed in Switzerland @ ISO ISO 8573-3:1999(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with sO, also take part in the work. isO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. International Standard ISO 8573-3 was prepared by Technical Committee ISO/TC 118 Compressors, pneumatic tools and pneumatic machines, Subcommittee SC 4, Quality of compressed air. ISO 8573 consists of the following parts, under the general title Compressed air Part 1: Contaminants and quality classes Part 2: Test methods for aerosol oil content Part 3: Test methods for measurement of humidity Part 4: Test methods for solid particle content Part 5: Test methods for oil vapour and organic solvent content Part 6: Test methods for gaseous contaminant content Part 7: Test methods for viable microbiological contaminant content Annexes A, B, C and D are for information only. ili