ISO INTERNATIONAL STANDARD 7637-2 Third edition 2011-03-01 Road vehicles Electrical disturbances from conduction and coupling Part 2: Electrical transient conduction along supply lines only Vehicules routiers Perturbations électriques par conduction et par couplage- Partie 2: Perturbations électriques transitoires par conduction uniquementlelongdeslignesd'alimentation Reference number ISO 7637-2:2011(E) @ ISO 2011 ISO 7637-2:2011(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In COPYRIGHTPROTECTEDDOCUMENT @ ISO2011 All rights reserved. Unless otherwise specified, 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 either isO at the address below or IsO's memberbody in the country of the requester. ISO copyright office Case postale 56. CH-1211 Geneva 20 Tel. + 4122 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland ii @ ISO 2011 - All rights reserved ISO 7637-2:2011(E) Contents Page Foreword .iv 1 Scope 2 Normative reference 3 Terms and definitions. 4 Test procedure 4.1 General. 4.2 Test temperature and supply voltages. 4.3 Voltagetransientemissionstest... 4.4 Transient immunity test.... 5 Test instrument description and specifications .... 5.1 Artificial network . 5.2 Shunt resistor Rs 5.3 Switch S.. 10 5.4 Powersupply 5.5 Measurement instrumentation .. 12 5.6 Test pulse generator for immunity testing ... 12 Annex A (informative) Example of test pulse severity levels associated with function performance status classification ... .17 Annex B (normative) Transient emissions evaluation Voltage waveform, ..19 AnnexC(normative)Testpulsegeneratorverificationprocedure .23 ..26 Annex E (informative) Origin of transients in the electric system of road vehicles . Annex F (informative) Alternative transient testing technique using electromechanically switched inductive loads ... 33 Bibliography.. 43 @IsO2011-All rights reserved ii