EN 62311:2008

SLOVENSKI STANDARD
01-julij-2008
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SIST EN 50392:2004
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Assessment of electronic and electrical equipment related to human exposure
restrictions for electromagnetic fields (0 Hz - 300 GHz)
Bewertung von elektrischen und elektronischen Einrichtungen in Bezug auf
Begrenzungen der Exposition von Personen in elektromagnetischen Feldern (0 Hz - 300
GHz)
Evaluation des équipements électroniques et électriques en relation avec les restrictions
d'exposition humaine aux champs électromagnétiques (0 Hz - 300 GHz)
Ta slovenski standard je istoveten z: EN 62311:2008
ICS:
13.280 Varstvo pred sevanjem Radiation protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 62311
NORME EUROPÉENNE
January 2008
EUROPÄISCHE NORM
ICS 97.030 Supersedes EN 50392:2004

English version
Assessment of electronic and electrical equipment
related to human exposure restrictions
for electromagnetic fields (0 Hz - 300 GHz)
(IEC 62311:2007, modified)
Evaluation des équipements  Bewertung von elektrischen
électroniques et électriques und elektronischen Einrichtungen
en relation avec les restrictions in Bezug auf Begrenzungen
d'exposition humaine der Exposition von Personen
aux champs électromagnétiques in elektromagnetischen Feldern
(0 Hz - 300 GHz) (0 Hz - 300 GHz)
(CEI 62311:2007, modifiée) (IEC 62311:2007, modifiziert)

This European Standard was approved by CENELEC on 2007-12-04. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62311:2008 E
Foreword
The text of document 106/129/FDIS, future edition 1 of IEC 62311, prepared by IEC TC 106, Methods for
the assessment of electric, magnetic and electromagnetic fields associated with human exposure, was
submitted to the IEC-CENELEC parallel vote.
A draft amendment, prepared by the Technical Committee CENELEC TC 106X, Electromagnetic fields in
the human environment, was submitted to the Unique Acceptance Procedure.
The combined texts of IEC 62311:2007 and the draft amendment prAA were approved by CENELEC as
EN 62311 on 2007-12-04.
This European Standard supersedes EN 50392:2004.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2009-01-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-01-01
Annex ZA has been added by CENELEC.
__________
- 3 - EN 62311:2008
Endorsement notice
The text of the International Standard IEC 62311:2007 was approved by CENELEC as a European
Standard with agreed common modifications as given below.
COMMON MODIFICATIONS
2 Normative references
Add:
Council Recommendation 1999/519/EC of 12 July 1999 on the limitation of exposure of the general public
to electromagnetic fields (0 Hz to 300 GHz), Official Journal L 199 of 30 July 1999
3 Definitions
3.4 Replace "current density" by "induced current density".
Replace the whole Clause 4 by:
4 Compliance criteria
The electronic and electrotechnical apparatus shall comply with the basic restriction as specified in
Annex II of Council Recommendation 1999/519/EC.
NOTE 1 The time averaging in the EU-Recommendation applies.
The reference levels in the Council Recommendation 1999/519/EC on public exposure to electromagnetic
fields are derived from the basic restrictions using worst-case assumptions about exposure. If the
reference levels are met, then the basic restrictions will be complied with, but if the reference levels are
exceeded, that does not necessarily mean that the basic restrictions will not be met. In some situations, it
will be necessary to show compliance with the basic restrictions directly, but it may also be possible to
derive compliance criteria that allow a simple measurement or calculation to demonstrate compliance with
the basic restriction. Often these compliance criteria can be derived using realistic assumptions about
conditions under which exposures from a device may occur, rather than the conservative assumptions
that underly the reference levels.
NOTE 2 The limit is the basic restriction.
If the technology in the apparatus is not capable of producing an E-field, H-field or contact current, at the
normal user position, at levels higher than 1/2 the limit values then the apparatus is deemed to comply
with the requirements in this standard in respect of that E-field, H-field or contact current without further
assessment.
Bibliography
Add the following note for the standard indicated:
ISO/IEC 17025 NOTE Harmonized as EN ISO/IEC 17025:2005 (not modified).
__________
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

1)
IEC 60050-161 – International Electrotechnical Vocabulary – –
(IEV) -
Chapter 161: Electromagnetic compatibility

1)
Undated reference.
IEC 62311
Edition 1.0 2007-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Assessment of electronic and electrical equipment related to human exposure
restrictions for electromagnetic fields (0 Hz – 300 GHz)

Evaluation des équipements électroniques et électriques en relation avec
les restrictions d'exposition humaine aux champs électromagnétiques
(0 Hz – 300 GHz)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XB
CODE PRIX
ICS 97.030 ISBN 2-8318-9269-4
– 2 – 62311 © IEC:2007
CONTENTS
FOREWORD.4

1 Scope and object.6
2 Normative references .6
3 Terms and definitions .6
4 Compliance criteria.10
5 Assessment methods .10
6 Evaluation of compliance to limits.11
7 Applicability of compliance assessment methods.12
7.1 General .12
7.2 Generic procedure for assessment of equipment .14
8 Sources with multiple frequencies .17
8.1 Introduction .17
8.2 Frequency range from 1 Hz – 10 MHz (ICNIRP-based).17
8.2.1 Frequency domain assessment.17
8.2.2 Time domain assessment .19
8.3 Frequency range from 100 kHz – 300 GHz (ICNIRP-based) .21
8.4 Frequency range from 0 kHz – 5 MHz (IEEE-based).22
8.4.1 Frequency domain assessment.22
8.4.2 Time domain assessment .22
8.5 Frequency range from 3 kHz – 300 GHz (IEEE-based) .23
9 Assessment report.23
9.1 General .23
9.2 Items to be recorded in the assessment report .24
9.2.1 Assessment method .24
9.2.2 Presentation of the results.24
9.2.3 Equipment using external antennas .24
10 Information to be supplied with the equipment .24

Annex A (informative) Field calculation .25
Annex B (informative) SAR compliance assessment .30
Annex C (informative) Information for numerical modelling.32
Annex D (informative) Measurements of physical properties and body currents .61
Annex E (informative) Specific absorption rate (SAR) .65
Annex F (informative) Measurement of E and H field.67
Annex G (informative)  Source modelling .70

Bibliography.73

Figure 1 – Assessment flowchart .16
Figure 2 – Schematic of “weighting circuit”.19
Figure 3 – Dependency on frequency of the reference levels V plotted with smoothing
edges .19
Figure 4 – Transfer function A.20

62311 © IEC:2007 – 3 –
Figure A.1 – Geometry of antenna with largest linear dimension D.25
Figure A.2 – Current element Idlsin(ω t) at the origin of spherical coordinate system .26
2 2
Figure A.3 – Ratio of E , H , and E × H field components .27
Figure A.4 – Ratio of E × H field components for three typical antennas.28
Figure A.5 – Far-field = straight line, radiated near-field = lower line & all near-fields =
other line .
Figure C.1 – Numerical model of a homogenous ellipsoid .34
Figure C.2 – Numerical model of a homogenous cuboid.35
Figure C.3a — Description of the whole body .36
Figure C.3b — Details of the construction of the head and shoulders.37
Figure C.3 – Numerical model of a homogenous human body .37
Figure C.4 – Schematic of straight wire.41
Figure C.5 – Schematic of circular coil.42
Figure C.6 – Block diagram of the method .43
Figure C.7 – Test situation for validation – Current loop in front of a cuboid.45
Figure C.8 – Distribution of the electric current density J in the planes x = + 0,20 m
(left) and y = 0,0 m (right) .46
Figure C.9 – Helmholtz coils and prolate spheroid .47
Figure C.10a – Magnetic field .47
Figure C.10b – Induced current density .
...