ISO INTERNATIONAL STANDARD 8301 First edition 1991-08-01 Thermal insulation - Determination of steady-state thermal resistance and related properties -- Heat flow meter apparatus Isolation thermique -- Determination de la résistance thermique et des proprietés connexes en regime stationnaire --- Methode fluxmetrique Reference number ISO 8301:1991(E) Not for Resale orking permitted without license from IHS 1SO 8301:1991(E) Contents Page Section 1 General 1.1 Scope 1.2 Normative references 1.3 Definitions 1.4 Symbols and units 1.5 Significance 1.6 Principle 6 1.7 Limitations due to apparatus 6 1.8 Limitations due to the specimens Apparatus and calibration Section 2 9 2.1 General 9 2.2 Apparatus 9 16 2.3 Guidelines for apparatus design 2.4 16 Calibration 2.5 Performance check Section 3 21 Test procedures 3.1 21 General 3.2 21 Test specimens 3.3 Test method 23 Procedures requiring multiple measurements 24 3.4 3.5 Calculations 26 3.6 Test report 27 C ISO 1991 Atl rights reserved. No part of this publication may be reproduced or utllzed in any form or by any means, electronic or mechanical, inciuding photocopying and microfim, without Internatonal Organization for Standardization Case Postale 56: CH-1211 Geneve 20:Switzerland Printed in Switzerland ii Copyright International Organization for Standardization d without license from IHS Not for Resale ISO 8301:1991(E) Annexes Limit values for apparatus performance and testing conditions 29 A Heat flow meters 32 B Guidelines for estimation of maximum thickness of specimens in c heat flow meter apparatus 34 Thermocouples 35 D Bibliography E 37 iii Copyright International Organization for Standardization Not for Resale No reproduction or networking permitted withoutlicense from IHS