ISO INTERNATIONAL STANDARD 16900-11 First edition 2013-10-15 Respiratory protective devices - Methods of test and test equipment - Part 11: Determination of field of vision Appareils de protection respiratoire - Methodes d'essai et équipement d'essai - Partie 11: Détermination du champ de vision Reference number IS0 16900-11:2013(E) ISO CopyrihtInternational Organization for Standardization @IS02013 itted without license from IHS Not for Resale IS0 16900-11:2013(E) COPYRIGHT PROTECTED DOCUMENT @IS02013 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form 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 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 2013 - All rights reserved Not for Resale IS0 16900-11:2013(E) Contents Page Foreword .iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions 4 Prerequisites ..1 5 General test requirements ..2 6 Principle 7 Apparatus. ..2 8 Device preparation .2 8.1 Mounting the device ..2 8.2 Mapping the field of vision .3 8.3 Calculating the Visual Field Score (VFS) ..3 9 Testreport .6 Annex A (normative) Application of uncertainty of measurement ..7 Annex B (normative) Headforms for determining the field of vision ..9 Bibliography .11 iii vithout license from IHS Not for Resale