ISO INTERNATIONAL STANDARD 9869-1 First edition 2014-08-01 Thermal insulation Building elements In-situ measurement of thermal resistance and thermal transmittance - Part 1: Heat flow meter method Isolation thermiqueElements de construction -Mesurage in situ de la résistance thermique et du coefficient de transmission thermique- Partie 1: Methode du fluxmetre Reference number IS0 9869-1:2014(E) SO @ IS0 2014 I without license from IHS Not for Resale IS0 9869-1:2014(E) COPYRIGHTPROTECTEDDOCUMENT @ ISO 2014 All rights reserved. Unless otherwise specified, 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 copyrightoffice Case postale 56:CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ IS0 2014 - All rights reserved No reproductic networking permited without license from IHS Not for Resale IS0 9869-1:2014(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references 3 Terms, definitions, symbols and units .2 3.1 Terms and definitions 2 3.2 Symbols and units. .2 4 Apparatus .4 4.1 Heat flow meter (HFM) 4 4.2 Temperature sensors 4 5 Calibration procedure. .5 5.1 Calibration of the HFM ..5 5.2 Temperature sensors .6 5.3 Measuring equipment .7 6 Measurements. .7 6.1 Installation of the apparatus .7 6.2 Data acquisition ..8 7 Analysis of the data .8 7.1 Average method ..8 7.2 Storage effects ..10 7.3 Comparison of calculated and measured values. ..12 8 Corrections forthe thermal resistance and the finite dimension of the HFM ..12 9 Accuracy ..12 10 Test report .13 Annex A (normative) Heat transfer at surfaces and U-value measurement ..15 Annex B (normative) Dynamic analysis method ..18 Annex C (normative) Examination of the structure of the element ..23 Annex D (informative) Perturbations caused by the heatflowmeter. .25 Annex E (informative) Checking the accuracy of the measurement system of heat flow rate ..31 Annex F (informative) Heat storage effects. ..34 Bibliography .36 iii se with IS thout license from IHS Not for Resale