IEC 62232:2017
(Main)Determination of RF field strength, power density and SAR in the vicinity of radiocommunication base stations for the purpose of evaluating human exposure
Determination of RF field strength, power density and SAR in the vicinity of radiocommunication base stations for the purpose of evaluating human exposure
IEC 62232:2017 provides methods for the determination of radio-frequency (RF) field strength and specific absorption rate (SAR) in the vicinity of radiocommunication base stations (RBS) for the purpose of evaluating human exposure. This document:
- considers intentionally radiating RBS which transmit on one or more antennas using one or more frequencies in the range 110 MHz to 100 GHz;
- considers the impact of ambient sources on RF exposure at least in the 100 kHz to 300 GHz frequency range;
- specifies the methods to be used for RF exposure evaluation for compliance assessment applications, namely:
- product compliance - determination of compliance boundary information for an RBS product before it is placed on the market;
- product installation compliance - determination of the total RF exposure levels in accessible areas from an RBS product and other relevant sources before the product is put into service;
- in-situ RF exposure assessment – measurement of in-situ RF exposure levels in the vicinity of an RBS installation after the product has been taken into operation;
- describes several RF field strength and SAR measurement and computation methodologies with guidance on their applicability to address both the in-situ evaluation of installed RBS and laboratory-based evaluations;
- describes how surveyors, with a sufficient level of expertise, establish their specific evaluation procedures appropriate for their evaluation purpose;
- provides guidance on how to report, interpret and compare results from different evaluation methodologies and, where the evaluation purpose requires it, determine a justified decision against a limit value and
- provides short descriptions of the informative example case studies given in the companion Technical Report IEC TR 62669]
This second edition cancels and replaces the first edition published in 2011 and constitutes a technical revision.
Détermination de l'intensité de champ de radiofréquences, de la densité de puissance et du DAS à proximité des stations de base de radiocommunication dans le but d'évaluer l'exposition humaine
IEC 62232:2017 donne des méthodes de détermination du champ de radiofréquences (RF) et du débit d'absorption spécifique (DAS) à proximité des stations de base de radiocommunication (RBS) dans le but d'évaluer l'exposition humaine. Le présent document:
- examine des RBS rayonnant intentionnellement qui transmettent sur une ou plusieurs antennes dans la plage de fréquences de 110 MHz à 100 GHz;
- étudie l'impact des sources ambiantes d'exposition RF au moins dans la plage de fréquences de 100 kHz à 300 GHz;
- spécifie les méthodes d'évaluation de l'exposition RF à utiliser pour les applications d'appréciation de la conformité, à savoir:
- conformité du produit: détermination des informations sur la frontière de conformité des produits RBS avant leur commercialisation;
- conformité de l'installation du produit: détermination des niveaux d'exposition RF totaux dans les zones accessibles depuis un produit RBS et les autres sources pertinentes avant la mise en service du produit;
- appréciation de l'exposition RF sur site: mesure des niveaux d'exposition RF à proximité d'une installation RBS après la mise en service du produit;
- décrit plusieurs méthodologies de mesure et de calcul de l'intensité de champ de radiofréquences et du DAS avec des recommandations relatives à leur applicabilité pour couvrir tant l'évaluation sur site des RBS installées que les évaluations en laboratoire;
- décrit la manière dont un vérificateur ayant des compétences suffisantes établit ses propres procédures d'évaluation, en fonction de ses objectifs d'évaluation;
- fournit des recommandations quant à la manière de rendre compte, d'interpréter et de comparer les résultats obtenus à partir de différentes méthodologies d'évaluation et, lorsque l'objectif de l'évaluation l'exige, prendre une décision justifiée en vertu d'une valeur limite donnée;
- fournit, à titre informatif, de brèves descriptions d'exemples d'études de cas dans le cadre de la comparaison avec le rapport technique IEC 62669
Cette deuxième édition annule et remplace la première édition parue en 2011, dont elle constitue une révision technique.
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IEC 62232 ®
Edition 2.0 2017-08
INTERNATIONAL
STANDARD
colour
inside
Determination of RF field strength, power density and SAR in the vicinity of
radiocommunication base stations for the purpose of evaluating human
exposure
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IEC 62232 ®
Edition 2.0 2017-08
INTERNATIONAL
STANDARD
colour
inside
Determination of RF field strength, power density and SAR in the vicinity of
radiocommunication base stations for the purpose of evaluating human
exposure
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.280; 17.240 ISBN 978-2-8322-4635-1
– 2 – IEC 62232:2017 © IEC 2017
CONTENTS
FOREWORD . 12
INTRODUCTION . 14
1 Scope . 15
2 Normative references . 15
3 Terms and definitions . 16
4 Symbols and abbreviated terms . 22
4.1 Physical quantities . 22
4.2 Constants . 23
4.3 Abbreviated terms . 23
5 Quick start guide and how to use this document . 24
5.1 Overview. 24
5.2 Quick start guide . 24
5.3 How to use this document . 26
5.4 Worked case studies . 27
6 Evaluation processes for product compliance, product installation compliance and
in-situ RF exposure assessments . 27
6.1 Evaluation process for product compliance . 27
6.1.1 General . 27
6.1.2 Establishing compliance boundaries . 27
6.1.3 Iso-surface compliance boundary definition . 28
6.1.4 Simple compliance boundaries . 28
6.1.5 Methods for establishing the compliance boundary . 30
6.1.6 Uncertainty . 32
6.1.7 Reporting . 32
6.2 Evaluation process used for product installation compliance . 33
6.2.1 General . 33
6.2.2 General evaluation procedure for product installations . 33
6.2.3 Product installation data collection . 34
6.2.4 Simplified product installation evaluation process . 35
6.2.5 Assessment area selection . 37
6.2.6 Measurements . 39
6.2.7 Computations . 40
6.2.8 Uncertainty . 41
6.2.9 Reporting . 41
6.3 Evaluation processes for in-situ RF exposure assessment . 42
6.3.1 General requirements, source determination and site analysis . 42
6.3.2 Measurement procedures . 44
6.3.3 Uncertainty . 45
6.3.4 Reporting . 45
6.4 Averaging procedures . 46
6.4.1 Spatial averaging . 46
6.4.2 Time averaging . 46
7 Determining the evaluation method . 46
7.1 Overview. 46
7.2 Process to determine the evaluation method . 46
7.2.1 General . 46
7.2.2 Establishing the evaluation points in relation to the source-environment
plane . 47
7.2.3 Exposure metric selection . 49
8 Evaluation methods . 49
8.1 Overview. 49
8.2 Measurement methods . 50
8.2.1 General . 50
8.2.2 RF field strength measurements . 50
8.2.3 SAR measurements . 51
8.3 Computation methods . 52
9 Uncertainty . 53
10 Reporting. 54
10.1 General requirements . 54
10.2 Report format . 54
10.3 Opinions and interpretations . 55
Annex A (informative) Source environment plane and guidance on the evaluation
method selection . 56
A.1 Guidance on the source-environment plane . 56
A.1.1 General . 56
A.1.2 Source-environment plane example . 56
A.1.3 Source regions . 57
A.2 Select between computation or measurement approaches . 63
A.3 Select measurement method . 64
A.3.1 Selection stages . 64
A.3.2 Selecting between field strength and SAR measurement approaches . 64
A.3.3 Selecting between broadband and frequency-selective measurement . 65
A.3.4 Selecting RF field strength measurement procedures . 66
A.4 Select computation method . 66
A.5 Additional considerations . 68
A.5.1 Simplicity . 68
A.5.2 Evaluation method ranking . 68
A.5.3 Applying multiple methods for RF exposure evaluation . 68
Annex B (normative) Evaluation methods . 69
B.1 Overview. 69
B.2 Evaluation parameters . 69
B.2.1 Overview . 69
B.2.2 Coordinate systems . 69
B.2.3 Reference points . 70
B.2.4 Variables . 70
B.3 Measurement methods . 73
B.3.1 RF field strength measurements . 73
B.3.2 SAR measurements . 104
B.4 Computation methods . 114
B.4.1 Overview and general requirements . 114
B.4.2 Formulas . 115
B.4.3 Basic algorithms . 123
B.4.4 Advanced computation methods . 129
B.5 Extrapolation from the evaluated SAR / RF field strength to the required
assessment condition.
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