1、 PUBLICLY AVAILABLE SPECIFICATION IEC PAS 62435Pre-Standard First edition2005-09 Electronic components Long-duration storage of electronic components Guidance for implementation Reference number IEC/PAS 62435:2005(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SU
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9、ance for implementation PRICE CODE IEC 2005 Copyright-all rights reserved 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 Electrotechnica
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11、-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 PAS 62435 IEC:2005(E)CONTENTS FOREWORD.4 INTRODUCTION.5 1 Scope.6 2 Normative references.6 3 Storage decision criteria.6 3.1 Advantages.7 3.1.1 Technical simplicity Rapidity.7 3.1.2 Solution durability.7 3.1.3 P
12、reventive storage.7 3.2 Hazards Drawbacks.7 3.2.1 Generic aging hazard.7 3.2.2 Poor stock dimensioning.7 3.2.3 Incorrect control of reliability during storage.8 3.2.4 Freezing equipment functionalities.8 3.3 Storage cost.8 3.4 Decision criteria.8 4 Purchasing Procurement.9 4.1 List of components.9 4
13、.2 Quantity of components to be stored.9 4.2.1 Production stock.9 4.2.2 Field service stock.9 4.3 When is it worth keeping in stock?.10 4.4 Procurement recommendations.10 5 Technical validation of the components.10 5.1 Purpose.10 5.2 Relevant field.10 5.3 Test selection criteria.11 5.4 Measurements
14、and tests.11 5.4.1 Sampling.11 5.4.2 Visual examination,sealing,solderability.11 5.4.3 Compliance with the electrical specifications.12 5.4.4 Assessment of the supplied batch reliability.13 5.4.5 Manufacturing control check(technological analysis).15 5.5 Sanction.15 6 Conditioning and storage.15 6.1
15、 Type of environment.15 6.2 Elementary storage unit.16 6.3 Stock management.16 6.4 Redundancy.16 6.5 Identification Traceability.16 6.6 Initial packaging.16 6.7 Stabilization bake.17 6.8 Storage conditions.17 6.8.1 Storage area.17 6.8.2 Temperature.17 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR I
16、NTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.PAS 62435 IEC:2005(E)3 6.8.3 Temperature variations.17 6.8.4 Relative humidity Chemical attacks Contamination.17 6.8.5 Pressure.17 6.8.6 Electrostatic discharges.17 6.8.7 Vibration Mechanical impacts.18 6.8.8 Electromagnetic field Radiation.18 6.8.9 Light.18 6.9 Maintaining storage conditions.18 7 Periodic check of the components.18 7.1 Objectives.18 7.2 Periodicity.19 7.3 Tests during periodic check.19 8 Destocking.19 8.1 Precauti
