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INTERNATIONAL STANDARD ISO 11452-1 Third edition 2005-02-01 Road vehicles — Component test methods for electrical disturbances from narrowband radiated electromagnetic energy — Part 1: General principles and terminology Véhicules routiers — Méthodes d'essai d'un équipement soumis à des perturbations électriques par rayonnement d'énergie électromagnétique en bande étroite — Partie 1: Principes généraux et terminologie Reference number ISO 11452-1:2005(E) © ISO 2005 Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--`,,,``,-`-`,,`,,`,`,,`---

ISO 11452-1:2005(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 downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat 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 the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. © ISO 2005 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 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 ii © ISO 2005 – All rights reserved Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--`,,,``,-`-`,,`,,`,`,,`---

ISO 11452-1:2005(E) Contents Page Foreword............................................................................................................................................................ iv Introduction ........................................................................................................................................................ v Scope...................................................................................................................................................... 1 1 2 Terms and definitions........................................................................................................................... 1 General aim and practical use ............................................................................................................. 5 3 General test conditions ........................................................................................................................ 6 4 5 Instrumentation ..................................................................................................................................... 9 6 Test procedure .................................................................................................................................... 10 Annex A (normative) Functional performance status classification (FPSC) ............................................. 13 Annex B (informative) Constant peak test level ............................................................................................ 16 Bibliography ..................................................................................................................................................... 19 © ISO 2005 – All rights reserved iii Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--`,,,``,-`-`,,`,,`,`,,`---

ISO 11452-1:2005(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 11452-1 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3, Electrical and electronic equipment. This third edition cancels and replaces the second edition (ISO 11452-1:2001), which has been technically revised. ISO 11452 consists of the following parts, under the general title Road vehicles — Component test methods for electrical disturbances from narrowband radiated electromagnetic energy:  Part 1: General principles and terminology  Part 2: Absorber-lined shielded enclosure  Part 3: Transverse electromagnetic mode (TEM) cell  Part 4: Bulk current injection (BCI)  Part 5: Stripline  Part 7: Direct radio frequency (RF) power injection Radiating loop method is to form the subject of a future part 8. iv © ISO 2005 – All rights reserved Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--`,,,``,-`-`,,`,,`,`,,`---

ISO 11452-1:2005(E) Introduction In recent years, an increasing number of electronic devices for controlling, monitoring and displaying a variety of functions have been introduced into vehicle designs. It is necessary to consider the electrical and electromagnetic environment in which these devices operate. Electrical and radio-frequency disturbances occur during normal operation of many items of motor vehicle equipment. They are generated over a wide frequency range with various electrical characteristics and can be distributed to on-board electronic devices and systems by conduction, radiation or both. Narrowband signals generated from sources on or off the vehicle can also be coupled into the electrical or electronic system, affecting the normal performance of electronic devices. Such sources of narrowband electromagnetic disturbances include mobile radios and broadcast transmitters. The characteristics of the immunity of components to radiated disturbances have to be established. ISO 11452 provides various test methods for the evaluation of component immunity characteristics. Not all test methods need be used for a given device under test (DUT). For example, stripline, transverse electromagnetic (TEM) cell and parallel plate test methods provide very similar exposure to the DUT. Only those tests necessary for replicating the use and mounting location of the DUT need to be included in the test plan. This will help to ensure a technically and economically optimized design for potentially susceptible components and systems. ISO 11452 is not intended as a product specification and cannot function as one (see A.1). Therefore, no specific values for the test severity level are given. Annex A of this part of ISO 11452 specifies a general method for functional performance status classification (FPSC), while Annex B explains the principle of constant peak test level. Typical severity levels are included in an annex of each of the other parts of ISO 11452. Protection from potential disturbances has to be considered a part of total vehicle validation as described in ISO 11451, which covers vehicle test methods. It is important to know the correlation between component and vehicle tests. © ISO 2005 – All rights reserved v Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--`,,,``,-`-`,,`,,`,`,,`---

Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--`,,,``,-`-`,,`,,`,`,,`---

INTERNATIONAL STANDARD ISO 11452-1:2005(E) Road vehicles — Component test methods for electrical disturbances from narrowband radiated electromagnetic energy — Part 1: General principles and terminology 1 Scope This part of ISO 11452 specifies general conditions, defines terms, gives practical guidelines and establishes the basic principles of the component tests used in the other parts of ISO 11452 for determining the immunity of electronic components of passenger cars and commercial vehicles to electrical disturbances from narrowband radiated electromagnetic energy, regardless of the vehicle propulsion system (e.g. spark-ignition engine, diesel engine, electric motor). The electromagnetic disturbances considered are limited to continuous narrowband electromagnetic fields. A wide frequency range (0,01 MHz to 18 000 MHz) is allowed for the immunity testing of the components in this and the other parts of ISO 11452. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 absorber-lined shielded enclosure shielded enclosure/screened room with radio frequency-absorbing material on its internal ceiling and walls NOTE floor. The common practice is for the room to have a metallic floor, but absorbing material may also be used on the 2.2 amplitude modulation AM process by which the amplitude of a carrier wave is varied following a specified law, resulting in an AM signal 2.3 artificial network AN network inserted in the supply leads of the DUT which provides, in a given frequency range, a specified load impedance for the measurement of disturbance voltages, and which isolates the DUT from the power supply in that frequency range 2.4 broadband artificial network BAN device used in power, signal and control lines that presents a controlled impedance to the DUT over a specified frequency range while allowing the DUT to be interfaced to its support system © ISO 2005 – All rights reserved 1 Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--`,,,``,-`-`,,`,,`,`,,`---

ISO 11452-1:2005(E) 2.5 bulk current total amount of common mode current in a harness 2.6 compression point input signal level at which the measurement system becomes non-linear, when the output value will deviate from the value given by an ideal linear system 2.7 coupling means or device for transferring power between systems NOTE Adapted from IEC 60050-726. 2.8 current injection probe device for injecting current in a conductor without interrupting the conductor and without introducing significant impedance into the associated circuits 2.9 current (measuring) probe device for measuring the current in a conductor without interrupting the conductor and without introducing significant impedance into the associated circuits [IEC 60050-161] 2.10 degradation (of performance) undesired departure in the operational performance of any device, equipment or system from its intended performance NOTE The term “degradation” can apply to temporary or permanent failure. [IEC 60050-161] 2.11 dual directional coupler four-port device consisting of two transmission lines coupled together in such a manner that a single travelling wave in any one transmission line will induce a single travelling wave in the other, the direction of propagation of the latter wave being dependent upon that of the former NOTE Adapted from IEC 60050-726. 2.12 electromagnetic compatibility EMC ability of equipment or system to function satisfactorily in its electromagnetic environment without introducing intolerable electromagnetic disturbance to anything in that environment [IEC 60050-161] 2.13 electromagnetic disturbance any electromagnetic phenomenon which may degrade the performance of a device, equipment or system, or adversely affect living or inert matter 2 © ISO 2005 – All rights reserved Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--`,,,``,-`-`,,`,,`,`,,`---

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