IEC 62311:2007

Assessment of electronic and electrical equipment related to human exposure restrictions for electromagnetic fields (0 Hz - 300 GHz)

Applies to electronic and electrical equipment for which no dedicated product- or product family standard regarding human exposure to electromagnetic fields applies. The frequency range covered is 0 Hz to 300 GHz. The object of this generic standard is to provide assessment methods and criteria to evaluate such equipment against basic restrictions or reference levels on exposure of the general public related to electric, magnetic and electromagnetic fields and induced and contact current.

Evaluation des équipements électroniques et électriques en relation avec les restrictions d'exposition humaine aux champs électromagnétiques (0 Hz - 300 GHZ)

S'applique aux appareils électroniques et électriques auxquels aucune norme concernant l'exposition humaine aux champs électromagnétiques, dédiée à un produit ou à une famille de produits, ne s'applique. La plage de fréquences couverte va de 0 Hz à 300 GHz. L'objet de la présente norme générique est de fournir des méthodes et des critères d'évaluation pour démontrer que de tels appareils satisfont aux restrictions de base ou aux niveaux de référence pour l'exposition du public aux champs électriques, magnétiques et électromagnétiques, ainsi qu'aux courants induits et de contact.

General Information

• Status: Published
• Publication Date: 13-Aug-2007
• ICS: 97.030 - Domestic electrical appliances in general
• Technical Committee: TC 106 - Methods for the assessment of electric, magnetic and electromagnetic fields associated with human exposure
• Drafting Committee: MT 62311 - TC 106/MT 62311
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 18-Apr-2019

Relations

• Revised: IEC 62311:2019 - Assessment of electronic and electrical equipment related to human exposure restrictions for electromagnetic fields (0 Hz to 300 GHz)
• Effective Date: 05-Sep-2023

Standards Content (Sample)

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)
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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 .48
Figure C.10 – Modelling results for a 60 cm by 30 cm prolate spheroid .48
Figure C.11 – Induced current density .48
Figure C.12a – Magnetic field .49
Figure C.12b – Induced current density .49
Figure C.12 – Modelling results for a 160 cm by 80 cm prolate spheroid .49
Figure C.13 – Distribution of induced electric current density.50
Figure C.14 – Schematic position of source Q against model K.51
Figure C.15 – Position of source Q, sensor and model K.52
Figure C.16 – Hot spot.54
Figure C.17 – Gradient of flux density and area G.55
Figure C.18 – Equivalent coil .55

Figure C.19 – Gradients of flux density and coil .56
Figure C.20 – Measurement distance and related distances.58

Table 1 – Characteristics and parameters of the equipment to be considered .13
Table 2 – List of possible assessment methods .14
Table B.1 – Determining whole-body SAR implicit compliance levels .30
Table C.1 – Conductivity of tissue types .38
Table C.2 – Relative permittivity of tissue types .40
Table C.3 – Summary of results.
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