ISO 11452-2:2019
(Main)Road vehicles — Component test methods for electrical disturbances from narrowband radiated electromagnetic energy — Part 2: Absorber-lined shielded enclosure
Road vehicles — Component test methods for electrical disturbances from narrowband radiated electromagnetic energy — Part 2: Absorber-lined shielded enclosure
This document specifies an absorber-lined shielded enclosure method for testing the immunity (off-vehicle radiation source) of electronic components for passenger cars and commercial vehicles regardless of the propulsion system (e.g. spark-ignition engine, diesel engine, electric motor). The device under test (DUT), together with the wiring harness (prototype or standard test harness), is subjected to an electromagnetic disturbance generated inside an absorber-lined shielded enclosure, with peripheral devices either inside or outside the enclosure. It is applicable only to disturbances from continuous narrowband electromagnetic fields. See ISO 11452-1 for general test conditions.
Véhicules routiers — Méthodes d'essai d'un équipement soumis à des perturbations électriques par rayonnement d'énergie électromagnétique en bande étroite — Partie 2: Chambre anéchoïque
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 11452-2
Third edition
2019-01
Road vehicles — Component test
methods for electrical disturbances
from narrowband radiated
electromagnetic energy —
Part 2:
Absorber-lined shielded enclosure
Véhicules routiers — Méthodes d'essai d'un équipement soumis
à des perturbations électriques par rayonnement d'énergie
électromagnétique en bande étroite —
Partie 2: Chambre anéchoïque
Reference number
©
ISO 2019
© ISO 2019
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ii © ISO 2019 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test conditions . 1
5 Test location . 2
6 Test apparatus and instrumentation. 2
6.1 General . 2
6.2 Measuring equipment . 2
6.3 Stimulation and monitoring of DUT . 3
7 Test set-up for DUT powered by an unshielded power system . 3
7.1 Ground plane . 3
7.2 Power supply and AN . 3
7.3 Location of DUT . 4
7.4 Location of test harness . 4
7.5 Location of load simulator . 4
7.6 Location of field generating device (antenna) . 4
8 Test setup for DUT powered by a shielded power system .11
8.1 Ground plane .11
8.2 Power supply and AN .11
8.3 Location of DUT .11
8.4 Location of test harness .12
8.5 Location of load simulator .12
8.6 Location of field generating device (antenna) .13
9 Test method .31
9.1 General .31
9.2 Test plan .31
9.3 Test procedure .32
9.3.1 General.32
9.3.2 Substitution method .32
9.3.3 Field calibration .32
9.3.4 DUT test .33
9.4 Test report .33
Annex A (informative) Remote/local grounding .34
Annex B (informative) Function performance status classification (FPSC) .36
Bibliography .37
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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 32,
Electric and electronic equipment.
This third edition cancels and replaces the second edition (ISO 11452-2:2004), which has been
technically revised.
The main changes compared to the previous edition are as follows:
a) introduction of reference to additional artificial networks (HV-AN, AMN, AAN) for DUT powered by
a shielded power system;
b) precisions for ground plane dimensions;
c) suppression of the minimum distance requirement between rear of horn antenna and absorbers;
d) addition of test set-up descriptions and Figures for DUT powered by a shielded power system;
e) suppression of Annex A relative to artificial networks which are now defined in ISO 11452-1; and
f) update of previous Annex C to be in line with new functional performance status classification
(FPSC) format.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved
Introduction
Immunity measurements of complete vehicles are generally able to be carried out only by the vehicle
manufacturer, owing to, for example, high costs of an absorber-lined shielded enclosure (ALSE), the
desire to preserve the secrecy of prototypes or a large number of different vehicles models.
For research, development and quality control, a laboratory measuring method can be used by both
vehicle manufacturers and equipment suppliers to test electronic components.
INTERNATIONAL STANDARD ISO 11452-2:2019(E)
Road vehicles — Component test methods for electrical
disturbances from narrowband radiated electromagnetic
energy —
Part 2:
Absorber-lined shielded enclosure
1 Scope
This document specifies an absorber-lined shielded enclosure method for testing the immunity (off-
vehicle radiation source) of electronic components for passenger cars and commercial vehicles
regardless of the propulsion system (e.g. spark-ignition engine, diesel engine, electric motor). The
device under test (DUT), together with the wiring harness (prototype or standard test harness), is
subjected to an electromagnetic disturbance generated inside an absorber-lined shielded enclosure,
with peripheral devices either inside or outside the enclosure. It is applicable only to disturbances from
continuous narrowband electromagnetic fields. See ISO 11452-1 for general test conditions.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 11452-1:2015, Road vehicles — Component test methods for electrical disturbances from narrowband
radiated electromagnetic energy — Part 1: General principles and terminology
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 11452-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http: //www .electropedia .org/
— ISO Online browsing platform: available at https: //www .iso .org/obp
4 Test conditions
The applicable frequency range of the absorber-lined shielded enclosure test method is 80 MHz to 18 GHz.
The user shall specify the test severity level(s) over the frequency range. Suggested test levels are
included in Annex B.
Standard test conditions shall be according to ISO 11452-1 for the following:
— test temperature;
— supply voltage;
— modulation;
— dwell time;
— frequency step sizes;
— definition of test severity levels; and
— test signal quality.
5 Test location
The tests shall be performed in an ALSE.
The purpose of such an enclosure is to create an isolated electromagnetic compatibility test facility
which simulates open field testing. Basically, an ALSE consists of a s
...
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