ISO INTERNATIONAL STANDARD 7726 Second edition 1998-11-01 Ergonomics of the thermal environment - Instruments for measuring physical quantities Ergonomie des ambiances thermiques Appareils de mesure des grandeurs physiques ISO Reference number ISO 7726:1998(E) by IHS under lic itted without license from IHS Not for Resale ISO 7726:1998(E) Contents Page Scope. 2 Normative reference 3 General. 4 Measuring instruments . 2 5 Specificationsrelatingtomeasuringmethods 5 Annex A Measurement of air temperature. 12 Annex B Measurement of the mean radiant temperature. 14 Annex C Measurement of plane radiant temperature 28 Annex D Measurement of the absolute humidity of the air .... 35 Annex E Measurement of air velocity.. 45 Annex F Measurement of surface temperature 48 Annex G Measurement of operative temperature. 49 Annex H Bibliography.... 51 @ISO1998 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. International OrganizationforStandardization Casepostale56·CH-1211Geneve20·Switzerland Internet iso@iso.ch Printed in Switzerland CopyrightInternational Organization for Standardization py IHS under Not for Resale ISO 7726:1998(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through isO technical committees. Each member body interested in a subject for which atechnicalcommitteehasbeenestablishedhastherighttoberepresented on that committee. International organizations, governmental and non- governmental, in liaison with isO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 7726 was prepared by Technical Committee ISO/TC 159, Ergonomics, Subcommittee SC 5, Ergonomics of the physical environment. of which it constitutes a technical revision. Annexes A to H of this International Standard are for information only. CopyrightInternational Organization for Standardization ili Iwithout license from IHs Not for Resale