ISO INTERNATIONAL STANDARD 20894 First edition 2018-09 Aircraft LED based taxiing lightsystem General requirements Aéronefs - Systeme de lumiere de roulage a base de LED - Exigences générales Reference number IS0 20894:2018(E) so International Organization for Standardization, ee=Shenzhen Institute of Standards and Technology 9972181 @IS02018 Not for Resale, 2018/12/5 06:52:49 IS0 20894:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2018 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland Internatinir prganization for Standardization Licensee-Shenzhen nsttute of Standards andecS.e- All rights reserved rious National Standards Bodies Not for Resale, 2018/12/5 06:52:4 No reproduction or networking permitted without license from IH IS0 20894:2018(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. 2 Normative references 3 Terms and definitions 4 General requirements. .2 4.1 General .2 4.2 Operatinglife .2 4.3 Illuminance distribution.. .2 4.4 Countermeasure for ultraviolet rays .3 4.5 Electromagnetic interference. 3 4.6 Colour .3 4.7 Environmental condition 3 4.8 Countermeasure for collision .3 4.9 Electrical power source .3 5 Quality assurance provisions .3 5.1 Performance characteristics. .3 5.1.1 General .3 5.1.2 Illuminance performance. .4 5.1.3 Colour.. 5.1.4 Operating life .4 5.2 Electrical characteristics 5.2.1 General 4 5.2.2 Electromagnetic interference 5.2.3 Electrical power source 4 5.3 Mechanical and thermal characteristics ..4 5.3.1 General ..4 5.3.2 Environmental condition 5.3.3 Thermal analysis .4 Bibliography .10 Intenationa oganiaion @s1Sar218 - All rights reserved iii icensee=Shenzhen Institute of Standards and Technology 9972181 Not for Resale, 2018/12/5 06:52:49