SIST EN 61000-4-9:1997

SLOVENSKI STANDARD
SIST EN 61000-4-9:1997
01-marec-1997
Elektromagnetna združljivost (EMC) - 4-9. del: Preskusne in merilne tehnike -
Preskus odpornosti proti impulznemu magnetnemu polju (IEC 61000-4-9:1993)
Electromagnetic compatibility (EMC) -- Part 4-9: Testing and measurement techniques -
Pulse magnetic field immunity test
Elektromagnetische Verträglichkeit (EMV) -- Teil 4-9: Prüf- und Meßverfahren - Prüfung
der Störfestigkeit gegen impulsförmige Magnetfelder
Compatibilité Electromagnétique (CEM) -- Partie 4-9: Techniques d'essai et de mesure -
Essai d'immunité au champ magnétique impulsionnel
Ta slovenski standard je istoveten z: EN 61000-4-9:1993
ICS:
33.100.20 Imunost Immunity
SIST EN 61000-4-9:1997 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61000-4-9:1997

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SIST EN 61000-4-9:1997

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SIST EN 61000-4-9:1997

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SIST EN 61000-4-9:1997

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SIST EN 61000-4-9:1997

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SIST EN 61000-4-9:1997
NORME
CEI
INTERNATIONALE IEC
1000-4-9
INTERNATIONAL
Première édition
STANDARD
First edition
1993-06
Compatibilité électromagnétique -
Partie 4:
Techniques d'essai et de mesure -
Section 9: Essai d'immunité au
champ magnétique impulsionnel
Publication fondamentale en CEM
Electromagnetic compatibility (EMC) -
Part 4:
Testing and measurement techniques -
Section 9: Pulse magnetic field immunity test
Basic EMC Publication
© CEI 1993 Droits de reproduction réservés — Copyright — all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun pro-
any form or by any means, electronic or mechanical,
cédé, électronique ou mécanique, y compris la photocopie et
including photocopying and microfilm, without permission
les microfilms, sans l'accord écrit de l'éditeur. in writing from the publisher.
Bureau Central de la Commission Electrotechnique Internationale 3, rue de Varembé Suisse
Genève,
Commission Electrotechnique Internationale
CODE PRIX
International Electrotechnical Commission
PRICE CODE
IEC Meiiulysapo, waa 3neKTporexHN4ecKan KoMHCCHfi
• Pour prix, voir catalogue en vigueur
•
For price, see current cata logue

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SIST EN 61000-4-9:1997
3
1000-4-9 © I EC :1993
CONTENTS
Page
FOREWORD 7
INTRODUCTION 9
Clause
11
1 Scope
11
2 Normative references
13
3 General
13
4 Definitions
13
4.1 EUT
13
4.2 Induction coil
13
4.3 Induction coil factor
13
4.4 Immersion method
13
4.5 Proximity method
15 4.6 Ground (reference) plane
15
4.7 Decoupling network, back filter
15
4.8 Transient
15
5 Test levels
15
6 Test equipment
6.1 Test generator 17
6.2 Induction coil 19
23
6.3 Test and auxiliary instrumentation
25
7 Test set-up
25
7.1 Ground (reference) plane
25
7.2 Equipment under test
7.3 Test generator 27
27
7.4 Induction coil
8 Test procedure 27
27
8.1 Laboratory reference conditions
8.2 Carrying out the test 29
31
9 Test results and test report
Annexes
39
A Induction coil calibration method
41 8 - Characteristics of the induction coils
53
C - Selection of the test levels
57
D - Information on magnetic field strength

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SIST EN 61000-4-9:1997
1000-4-9 ©IEC:1993 5
Page
Figures
33
1 Example of application of the test field by the immersion method
33
2 Current waveform of the test generator for pulse magnetic field (6,4/16 µs)
3 Schematic circuit of the test generator for pulse magnetic field (6,4/16 µs) 33
4 Example of test set-up for table-top equipment 35
5 Example of test set-up for floor-standing equipment 35
6 Example of investigation of susceptibility to magnetic field
by the proximity method 37
37
7 Illustration of Helmholtz coils
B.1 - Characteristics of the field generated by a square induction coil (1 m side)
in its plane 45
B.2 - 3 dB area of the field generated by a square induction coil (1 m side) in its plane 45
B.3 - 3 dB area of the field generated by a square induction coil
(1 m side) in the mean orthogonal plane
47
(component orthogonal to the plane of the coil)
B.4 - 3 dB area of the field generated by two square induction
coils (1 m side) 0,6 m spaced, in the mean orthogonal
47
plane (component orthogonal to the plane of the coils)
B.5 - 3 dB area of the field generated by two square induction
coils (1 m side) 0,8 m spaced, in the mean orthogonal
49
plane (component orthogonal to the plane of the coils)
B.6 - 3 dB area of the field generated by a rectangular induction
49
coil (1 m x 2,6 m) in its plane
B.7 - 3 dB area of the field generated by a rectangular induction
coil (1 m x 2,6 m) in its plane (ground plane as a side of the induction coil) 51
B.8 - 3 dB area of the field generated by a rectangular induction
coil (1 m x 2,6 m) with ground plane, in the mean
orthogonal plane (component o rthogonal to the plane of the coil) 51

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SIST EN 61000-4-9:1997
1000-4-9 © I EC :1993 - 7 -
INTERNATIONAL ELECTROTECHNICAL COMMISSION
ELECTROMAGNETIC COMPATIBILITY (EMC) —
Part 4: Testing and measurement techniques—
Section 9 : Pulse magnetic field immunity test
Basic EMC Publication
FOREWORD
1)
The IEC (International Electrotechnical Commission) is a world-wide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote interna-
tional cooperation on all questions concerning standardization in the electrical and electronic fields. To this end
and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to
technical committees; any IEC National Committee interested in the subject dealt with may participate in this
preparatory work. International, governmental and non-governmental organizations liaising with the IEC also
participate in this preparation. The IEC collaborates closely with the International Organization (ISO) in accord-
ance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters, prepared by technical committees on which all
National Committees having a special interest therein are represented, express, as nearly as possible, an
intern
ational consensus of opinion on the subjects dealt with.
3)
They have the form of recommendations for international use published in the for of standards, technical repo
rts
or guides and they are accepted by the National Committeés in that sense.
4)
In order to promote international unification, the IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national or regional standards. Any divergence
between the IEC Standards and the corresponding national or regional standards shall be clearly indicated in the
latter.
International Standard IEC 1000-4-9 has been prepared by sub-committee 77B: High
frequency phenomena, of IEC technical committee 77: Electromagnetic compatibility.
It forms section 9 of part
4 of IEC 1000. It has the status of a basic EMC publication in
accordance with IEC guide 107.
The text of this standard is based on the following documents:
DIS
Report on Voting
77B(CO)8
77B(CO)14
Full information on the voting for the approval of this standard can be found in the Voting Repo rt
indicated in the above table.
Annexes A and B form an integral pa rt of this standard.
Annexes C and D are for information only.

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SIST EN 61000-4-9:1997
1000-4-9 © IEC:1993 - 9 -
INTRODUCTION
This standard is part of the IEC 1000 series, according to the following structure:
1: General
Part
General considerations (introduction, fundamental principles)
Definitions, terminology
Part 2: Environment
Description of the environment
Classification of the environment
Compatibility levels
Part 3: Limits
Emission limits
Immunity limits (in so far they do not fall under the responsibility of the product commit-
tees)
Part 4: Testing and measurement techniques
Measurement techniques
Testing techniques
Part 5: Installation and mitigation guidelines
Installation guidelines
Mitigation methods and devices
Part 9: Miscellaneous
is further subdivided into sections which are to be published either as international
Each part
s.
standards or as technical repo rt
These standards and reports will be published in chronological order and numbered accord-
ingly.
rt is an international standard which gives immunity requirements and test procedures
This pa
related to "pulse magnetic field".

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SIST EN 61000-4-9:1997
1000-4-9 ©IEC:1993 - 11 -
ELECTROMAGNETIC COMPATIBILITY (EMC)
Part 4: Testing and measurement
techniques —
Section 9 : Pulse magnetic field immunity test
Basic EMC Publication
1 Scope
This international standard relates to the immunity requirements of equipment, only under
operational conditions, to pulse magnetic disturbances mainly related to:
- industrial installations and power plants;
- medium voltage and high voltage sub-stations.
The applicability of this standard to equipment installed in different locations is determined by
the presence of the phenomenon, as specified in clause 3.
This standard does not consider disturbances due to capacitive or inductive coupling in cables
or other parts of the field installation.
Other IEC standards dealing with conducted disturbances cover these aspects.
The object of this standard is to establish a common and reproducible basis for evaluating the
performance of electrical and electronic equipment for household, commercial and industrial
applications when subjected to pulse magnetic fields.
The standard defines:
- recommended test levels;
- test equipment;
- test set-up;
- test procedure.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this section of IEC 1000-4. At the time of publication, the editions
indicated were valid. All normative documents are subject to revision, and parties to agree-
ments based on this section of IEC 1000-4 are encouraged to investigate the possibility of
applying the most recent editions of the normative documents indicated below. Members of
IEC and ISO maintain registers of currently valid International Standards.
IEC 60-2: 1973, High-voltage test techniques - Part 2: Test procedures
IEC 68-1: 1988, Environmental testing - Part 1: General and guidance
IEC 469-1: 1987, Pulse techniques and apparatus -
Parti: Pulse terms and definitions

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SIST EN 61000-4-9:1997
1000-4-9 ©IEC:1993 - 13 -
3 General
The magnetic fields to which equipment is subjected may influence the reliable operation of
equipment and systems.
The following tests are intended to demonstrate the immunity of equipment when subjected to
impulse magnetic fields related to the specific location and installation condition of the
equipment (e.g. proximity of equipment to the disturbance source).
Pulse magnetic fields are generated by lightning strokes on buildings and other metal struc-
tures including aerial masts, earth conductors and earth networks and by initial faults transients
in L.V., M.V.
and H.V. electrical systems.
In H.V. sub-stations, a pulse magnetic field may also be generated by the switching of H.V.
bus-bars and lines by circuit breakers.
The test is mainly applicable to electronic equipment to be installed in electrical plants as well
as in telecontrol centres. It is not relevant for distribution network equipment.
Possible other applications may be considered by the product committees.
The test field waveform is that of the standard current pulse, waveform 6,4/16 µs.
NOTE - The waveform 6,4/16 according to IEC 469-1 corresponds to the 8/20 µs of IEC 60-2.
4 Definitions
The following definitions and terms are used in this standard and apply to the restricted field
of magnetic disturbances; not all of them are included in the IEV(50)161.
4.1 EUT Equipment under test
4.2 Induction coil Conductor loop of defined shape and dimensions,
in which flows a current, generating a magnetic field
of defined constancy in its plane and in the enclosed
volume.
4.3 Induction coil factor
Ratio between the magnetic field strength gener-
ated by an induction coil of given dimensions and
the corresponding current value; the field is that
measured at the centre of the coil plane, without the
EUT.
4.4
Immersion method Method of application of the magnetic field to the
EUT,
which is placed in the centre of an induction
coil (figure 1).
4.5
Proximity method Method of application of the magnetic field to the
EUT, where a small induction coil is moved along
the side of the EUT in order to detect particularly
sensitive areas.

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SIST EN 61000-4-9:1997
1000-4-9 © IEC:1993 -
15 -
4.6 Ground (reference) plane (GRP)
A flat conductive surface whose potential is used as
a common reference for the magnetic field gener-
ator and the auxiliary equipment (the ground plane
can be used to close the loop of the induction coil,
as in figure 5) (IEV 161-04-36, modified).
4.7
Decoupling network, back filter
Electrical circuit intended to avoid reciprocal influ-
ence with other equipment not submitted to the
magnetic field test.
4.8
Transient Pertaining to or designating a phenomenon or a
quantity which varies between two consecutive
steady states during a time interval sho
rt compared
with the time-scale of interest. (IEV 161-02-01).
5 Test levels
The preferential range of test levels is given in table 1.
The magnetic field strength is expressed in A/m; 1 A/m corresponds to a free space induction
of 1,26 µT.
Table 1 - Test levels
Level Pulse magnetic field strength
A/m (peak)
1 n.a. 2)
2 n.a 2)
3
100
4
300
5
1000
1)
x special
NOTES
1 - X is an open level. This level can be given in the product specification.
2 - "n.a." = not applicable
Information on the selection of the test levels is given in annex C.
Information on actual levels is given in annex D.
6 Test equipment
The test magnetic field is obtained by a current flowing in an induction coil; the application of
the test field to the
EUT is by the immersion method.
An example of application of the immersion method is given in figure 1.
The test equipment includes the current source (test generator), the induction coil and auxiliary
test instrumentation.

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SIST EN 61000-4-9:1997
1000-4-9 ©I EC :1993 - 17 -
6.1 Test generator
The generator, with the output waveform corresponding to the test magnetic field, shall be able
to deliver the required current in the induction coils specified in 6.2.
The generator power capability shall therefore be dimensioned by taking into account the coil
impedance; the inductance may range from 2,5 µH for the 1 m standard coil, to several µH
(e.g. 6 µH) for a rectangular induction coil (1 m x 2,6 m, see 6.2).
The specifications of the generator are:
- current capability, determined by the maximum selected test level and induction coil factor
(1 m standard coil for testing table-top or small
(see 6.2 and annex A), ranging from 0,87 m- 1
(rectangular induction coil, 1 m x 2,6 m, for testing floor-standing or
equipment) to 0,66 m- 1
large equipment);
- operability in short circuit condition;
- low output terminal connected to the earth terminal (for connection to the safety earth of the
laboratory);
- precautions to prevent the emission of large disturbances that may be injected in the power
supply network or may influence the test results.
The characteristics and performances of the current source or test generator for the field
considered in this standard are given in 6.1.1.
6.1.1 Characteristics and performances of the test generator
The test generator is a non repetitive (single shot) pulse current generator with characteristics
as follows:
Specifications
Rise time: 6,4 µs±30
Duration: 16 µs ±30 %
Output current range: 100 A to 1000 A, divided by the coil factor
Polarity: positive and negative
Phase relationship with the power frequency: synchronizable from 0° to 360° with 10° steps
Synchronization: triggerable by external signal
A standard current pulse generator, e.g. the surge hybrid generator (waveform 1,2/50-6,4/16
µs), may be used.
NOTE - The output current range for the standard coil is from 120 A to 1200 A peak.
The waveform of the output current is given in figure 2.
The schematic circuit of the generator is given in figure 3.

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SIST EN 61000-4-9:1997
1000-4-9 ©I EC :1993 - 19 -
6.1.2
Verification of the characteristics of the test generator
In order to compare the results for different test generators, the essential characteristics of
the output current parameters shall be verified.
The output current shall be verified with the generator connected to the standard induction coil
specified in 6.2.1 a); the connection shall be realized by twisted conductors or coaxial cable
of up to 3 m length and suitable cross-section.
The emission of disturbances by the generator shall be verified (see 6.1).
The characteristics to be verified are:
- output current peak value;
- rise time;
- duration.
A 1,8 mm wire diameter (2,5 mm 2) should be used for the loop for short circuit current
operation; however, the mechanical rigidity should be taken into account.
The verifications shall be carried out with a current probe and oscilloscope or other equivalent
measurement instrumentation with 10 MHz minimum bandwidth.
The accuracy of the measurements shall be ± 10 %.
6.2 induction coil
6.2.1 Characteristics of the induction coil
The induction coil, connected to the test generator previously defined (see 6.1.1), shall
generate a field strength corresponding to the selected test level and the defined homogeneity.
The induction coil shall be made of copper, aluminium or any conductive non-magnetic
material, of such-cross-section and mechanical arrangement as to facilitate its stable position-
ing during the tests.
A same coil is suitable for the generation of the magnetic fields considered in this standard; it
may be a "single turn" coil and shall have a suitable current capability, as may be necessary
for the selected test level.
Multi-turn coils may be used in order to have a lower testing current.
The induction coil shall be adequately dimensioned to surround the EUT (three orthogonal.
positions).
Depending on the size of the EUT, induction coils of different dimensions may be used.
The dimensions recommended below are suitable for the generation of magnetic fields over
with an
the whole volume of the EUT's (table-top equipment or floor-standing equipment),
acceptable variation of ± 3 dB.
The characteristics of induction coils in respect of the magnetic field distribution are given in
annex B.

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SIST EN 61000-4-9:1997
1000-4-9 ©IEC:1993 - 21 -
a)
Induction coil for table-top equipment
The induction coil of standard dimensions for testing small equipment (e.g. computer
monitors, watthour meters, transmitters for process control, etc.) has a square (or circular)
form with 1 m side (or diameter), made of a conductor of relatively small cross-section.
The test volume of the standard square coil is 0,6 m x 0,6 m x 0,5 m (height).
A double coil of standard size (Helmholtz coil) could be used in order to obtain a field
homogeneity better than 3 dB or for testing larger EUT's.
The double coil (Helmholtz coil) shall comprise of two or more series of turns, properly
spaced (see figure 7, figure B.4, figure B.5).
The test volume of a double standard size coil, 0,8 m spaced, for a 3 dB homogeneity is
0,6 m x 0,6 m x 1 m (height).
For example, the Helmholtz coils, for a 0,2 dB inhomogeneity, have dimensions and
separation distances as given in figure 7.
b) Induction coil for floor-standing equipment
Induction coils shall be made according to the dimensions of the EUT and the different
field polarizations.
EUT; the coil dimensions shall be such as to give a
The coil shall be able to envelop the
minimum distance of coil conductors to EUT equal to 1/3 of the dimension of the EUT
considered.
The coils shall be made of conductors of relatively small cross-section.
EUT' s, the coils may be made of "C" or "T" sections in order
NOTE - Due to the possible large dimensions of
to have sufficient mechanical rigidity.
The test volume is determined by the testing area of the coil (60 % x 60 % of each side)
multiplied by a depth corresponding to 50% of the shorter side of the coil.
6.2.2 Calibration of the induction coil, coil factor
In order to make it possible to compare the test results from different test equipment, the
induction coils shall be calibrated in their operating condition, before conducting the test
(without the EUT, in free space condition).
An induction coil of the correct dimensions for the EUT dimensions, shall be positioned at 1 m
minimum distance from the wall of the laboratory and any magnetic material, by using
insulating supports, and shall be connected to the test generator as prescribed in 6.1.2.
Appropriate magnetic field sensors- (B.W. > 10 MHz), with dynamics and frequency response
corresponding to the pulse field, shall be used to verify the magnetic field strength generated
by the induction coil.
The field sensor shall be positioned at the centre of the induction coil (without the EUT) and
with suitable orientation to detect the maximum value of the field.

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SIST EN 61000-4-9:1997
1000-4-9 ©IEC:1993 - 23 -
The current in the induction coil shall be adjusted to obtain the field strength specified by the
test level.
The calibration shall be carried out at power frequency: the current value that generates a
given field strength shall be used for the pulse test of the present standard.
The calibration procedure shall be carried out with the test generator and induction coil.
The coil factor is determined (and verified) by the above procedure.
The coil factor gives the current value to be injected in the coil to obtain the required test
magnetic field (H/1).
Information on the measurement of the test magnetic field is given in annex A.
6.3 Test and auxiliary instrumentation
6.3.1 Test instrumentation
The test instrumentation includes:
- current measuring system (sensors and instrument) for setting and measuring the current
injected in the induction coil;
- termination networks, back filters, etc., on power supply, control and signal lines.
The termination network gives a defined impedance of 50 S2 to earth for all the external circuits
connected to the EUT terminals. It may be represented by the line impedance stabilization
network for power supply circuits, coupling/decoupling network, or resistor-capacitor series for
input/output control and signal circuits. These networks shall be described in the test plan.
The termination networks, back filters, etc. shall be compatible with the operating signals.
Back filters shall be used in the connections to the simulator (see 6.3.2).
The current measuring system is a calibrated current probe or shunt; the transient current
measurement instrumentation shall have a bandwidth of 10 MHz.
The accuracy of the measurement instrumentation shall be ± 10 %.
6.3.2 Auxiliary instrumentation
The auxiliary instrumentation comprises a simulator and any other instrument necessary for
functional specifications.
the operation and verification of the EUT

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SIST EN 61000-4-9:1997
1000-4-9 ©IEC:1993 - 25 -
7 Test set-up
The test set-up comprises the following components:
- ground (reference) plane (GRP);
- equipment under test (EUT);
- test generator;
- induction coil;
- termination network, back filter.
Precautions shall be taken if the test magnetic field may interfere with the test instrumentation
and other sensitive equipment in the vicinity of the test set-up.
Examples of test set-ups are given in the following figures:
Figure 4: Example of test set-up for table-top equipment
Figure 5: Example of test set-up for floor-standing equipment
7.1 Ground (reference) plane
The ground plane (GRP) shall be placed in the laboratory; the EUT and auxiliary test equipment
shall be placed on it and connected to it.
The ground plane shall be a non magnetic metal sheet (copper or aluminium) of 0,25 mm
thickness; other metals may be used but in this case they shall have 0,65 mm minimum
thickness.
The minimum size of the ground plane is 1 m x 1 m.
The final size depends on the dimensions of the EUT.
The ground plane shall be connected to the safety earth system of the laboratory.
7.2 Equipment under test
The equipment is configured and connected to satisfy its functional requirements. It shall be
placed on the GRP with the interposition of a 0,1 m thickness insulating suppo
rt (e.g. d ry wood).
The equipment cabinets shall be connected to the safety earth directly on the GRP with a
connection of minimum length via the earth terminal of the EUT.
The power supply, input and output circuits shall be connected to the sources of power supply,
control and signals via the back filters.
The cables supplied or recommended by the equipment manufacturer shall be used. In
absence of any recommendation, unshielded cables shall be adopted, of a type appropriate
for the signals involved. All cables shall be exposed to the magnetic field for 1 m of their
length.
The back filters shall be inserted in the circuits at 1 m cable lengths from the EUT and
connected to the ground plane.
The input and output circuits, to the simulator, shall be provided with back filters in order to
prevent interference to that equipment.
The communication lines (data lines) shall be connected to the EUT by the cables given in the
technical specification or standard for this application. Each line, in the proximity of the EUT,
shall be maintained at a distance of about 0,1 m from the GRP.

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SIST EN 61000-4-9:1997
1000-4-9 © - 27 -
IEC:1993
7.3 Test generator
The test generator shall be placed at less than 3 m distance from the induction coil.
One terminal of the generator shall be connected to the ground plane.
7.4
Induction coil
The induction coil, of the type specified in 6.2.1, shall enclose the EUT placed at its centre.
Different induction coils may be selected for testing in the different orthogonal directions,
according to the general criteria specified in 6.2.1 a) and b).
Induction coils used in the vertical position (horizontal polarization of the field) can be bonded
(at the foot of one vertical conductor) directly to the ground plane, which represents the low
side of the coil, as a part of it. In this case, 0,1 m minimum distance from EUT to the ground
plane is sufficient.
The induction coil shall be connected to the test generator in the same way as for the calibration
procedure specified in 6.2.2.
The induction coil selected for the tests shall be specified in the test plan.
8 Test procedure
The test procedure shall include:
- verification of the laboratory reference conditions;
- preliminary verification of the correct operation of the equipment;
- carrying out the test;
- evaluation of the test results.
8.1 Laboratory reference conditions
In order to minimize the effect of environmental parameters on the test results, the test shall
be carried out in climatic and electromagnetic reference conditions as specified in 8.1.1 and
8.1.2.
8.1.1 Climatic conditions
The tests shall be carried out in standard climatic conditions in accordance with IEC 68-1:
- temperature: 15 °C to 35 °C
- relative humidity: 25 % to 75 %
- atmospheric pressure: 86 kPa to 106 kPa
NOTE - Any other value may be given in the product specifications.
8.1.2 Electromagnetic conditions
The electromagnetic conditions of the laboratory shall be such to guarantee the correct
operation of the EUT in order not to influence the test results; otherwise, the tests shall be
carried out in a Faraday cage.
In particular, the electromagnetic field value of the laboratory shall be at least 20 dB lower than
the selected test level. -

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SIST EN 61000-4-9:1997
1000-4-9 ©
- 29 -
IEC:1993
8.2
Carrying out the test
The test shall be carried out on the basis of a test plan including verification of the perform-
ances of the
EUT as defined in the technical specification.
The power supply, signal and other functional electrical quantities shall be applied within their
rated range.
If the actual operating signals are not available, they may be simulated.
Preliminary verification of equipment performances shall be carried out prior to applying the
test magnetic field.
The test magnetic field shall be applied by the immersion method to the EUT,
previously set-up
as specified in 7.2.
The test level shall not exceed the product specification.
NOTE - In order to detect the most susceptible side/positions of the EUT, mainly of a stationary
type, the proximity
method may be used for investigation purposes. This method is not to be used for ce rtification. An example of
applica
tion of the test field by proximity method is given in figure 6.
The test is pe
...