IEC 62232-ed.4.0

Annotation of standard text IEC 62232-ed.4.0 :

IEC 62232:2025 provides methods for the determination of RF field strength, power density and specific absorption rate (SAR) in the vicinity of base stations (BS) for the purpose of evaluating human exposure. This document: a) considers intentionally radiating BS which transmit on one or more antennas using one or more frequencies in the range 110 MHz to 300 GHz; b) considers the impact of ambient sources on RF exposure at least in the 100 kHz to 300 GHz frequency range; c) specifies the methods to be used for RF exposure evaluation for compliance assessment applications, namely: 1) product compliance – determination of compliance boundary information for a BS product before it is placed on the market; 2) product installation compliance – determination of the total RF exposure levels in accessible areas from a BS product and other relevant sources before the product is put into operation; 3) in-situ RF exposure assessment – measurement of in-situ RF exposure levels in the vicinity of a BS installation after the product has been taken into operation; d) specifies how to perform RF exposure assessment based on the actual maximum approach; e) describes several RF field strength, power density, and SAR measurement and computation methodologies with guidance on their applicability to address both the in-situ evaluation of installed BS and laboratory-based evaluations; f) describes how surveyors establish their specific evaluation procedures appropriate for their evaluation purpose; g) 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; h) provides methods for the RF exposure assessment of BS using time-varying beam-steering technologies such as new radio (NR) BS using massive multiple input multiple output (MIMO). NOTE 1 Practical implementation case studies are provided as examples in the companion Technical Report IEC TR 62669 [5]. NOTE 2 Although the current BS product types have been specified to operate up to 200 GHz (see, for example, [6] and [7]), the upper frequency of 300 GHz is consistent with applicable exposure limits. NOTE 3 The lower frequency considered for ambient sources, 100 kHz, is derived from ICNIRP-1998 [2] and ICNIRP-2020 [1]. However, some applicable exposure guidelines require ambient fields to be evaluated as low as 3 kHz, e.g. Safety Code 6 [4] and IEEE Std C95.1-2019 [3]. NOTE 4 Specification of appropriate RF exposure mitigation measures such as signage, access control, and training are beyond the scope of this document. It is possible to refer to the applicable regulations or recommended practices on these topics. NOTE 5 While this document is based on the current international consensus about the best engineering practice for assessing the compliance of RF exposure with the applicable exposure limits, it is possible that national regulatory agencies specify different requirements. The entity conducting an RF exposure assessment needs to be aware of the applicable regulations. This fourth edition cancels and replaces the third edition published in 2022. It includes corrections of obvious errors and text improvements on the third edition in order to bring more clarity in the description of the assessment methods and avoid misinterpretations. This edition has the same technical content as the third edition. IEC 62232:2025 donne des methodes de determination de lintensite de champ RF, de la densite de puissance et du debit dabsorption specifique (DAS) a proximite des stations de base (BS) dans le but devaluer lexposition humaine. Le present document: a) examine des BS rayonnant intentionnellement qui emettent sur une ou plusieurs antennes dans la plage de frequences de 110 MHz a 300 GHz; b) etudie limpact des sources ambiantes dexposition RF au moins dans la plage de frequences de 100 kHz a 300 GHz; c) specifie les methodes devaluation de lexposition RF a utiliser pour les applications dappreciation de la conformite, a savoir: 1) conformite du produit: determination des informations sur la frontiere de conformite dun produit BS avant sa commercialisation; 2) conformite de linstallation du produit: determination des niveaux dexposition RF totaux dans les zones accessibles depuis un produit BS et les autres sources pertinentes avant la mise en service du produit; 3) appreciation de lexposition RF sur site: mesurage des niveaux dexposition RF sur site a proximite dune installation BS apres la mise en service du produit; d) specifie la maniere de proceder a lappreciation de lexposition RF en sappuyant sur lapproche fondee sur la reelle maximale; e) decrit plusieurs methodologies de mesure et de calcul de lintensite de champ RF, de la densite de puissance et du DAS avec des recommandations relatives a leur applicabilite pour couvrir tant levaluation sur site des BS installees que les evaluations en laboratoire; f) decrit la maniere dont les verificateurs etablissent leurs propres procedures devaluation, en fonction de leurs objectifs devaluation; g) fournit des recommandations quant a la maniere de rendre compte, dinterpreter et de comparer les resultats obtenus a partir de differentes methodologies devaluation et, lorsque lobjectif de levaluation lexige, prendre une decision justifiee en vertu dune valeur limite donnee; h) fournit les methodes dappreciation de lexposition RF de la BS a laide de technologies a orientation de faisceau variable dans le temps telles que les BS New Radio (NR) qui utilisent la technologie de systeme massif a entree multiple et sortie multiple (MIMO, Multiple Input Multiple Output). NOTE 1 Des exemples detudes de cas de mise en ouvre pratique sont donnes dans le Rapport technique daccompagnement IEC TR 62669 [5]. NOTE 2 Bien que les produits BS actuels soient concus pour fonctionner jusqua 200 GHz (voir par exemple [6] et [7]), la frequence superieure de 30