SIST EN 50413:2021/FprA1:2025

Basic standard on measurement and calculation procedures for human exposure to electric, magnetic and electromagnetic fields (0 Hz - 300 GHz)

This document provides general methods for measurement and calculation of quantities associated with human exposure to electromagnetic fields in the frequency range from 0 Hz to 300 GHz. It is intended specifically to be used for the assessment of emissions from products and comparison of these with the exposure limits for the general public given in Council Recommendation 1999/519/EC, and those given for workers in Directive 2013/35/EU, as appropriate. It also is intended to be used for assessment of human exposure to electromagnetic fields in the workplace to determine compliance with the requirements of Directive 2013/35/EU.
This standard deals with quantities that can be measured or calculated external to the body, notably electric and magnetic field strength or power density, and includes the measurement and calculation of quantities inside the body that form the basis for protection guidelines. In particular the standard provides information on:
- definitions and terminology,
- characteristics of electromagnetic fields,
- measurement of exposure quantities,
- instrumentation requirements,
- methods of calibration,
- measurement techniques and procedures for evaluating exposure,
- calculation methods for exposure assessment.
Where an applicable electromagnetic field standard specific to a product or technology exists it is expected to be used rather than this document. EN 62311:-, Table 1 gives a list of relevant standards.

Grundnorm zu Mess- und Berechnungsverfahren der Exposition von Personen in elektrischen, magnetischen und elektromagnetischen Feldern (0 Hz bis 300 GHz)

Norme de base pour les procédures de mesures et de calculs pour l'exposition des personnes aux champs électriques, magnétiques et électromagnétiques (0 Hz - 300 GHz)

Osnovni standard za merjenje in izračunavanje izpostavljenosti ljudi električnim, magnetnim in elektromagnetnim poljem (0 Hz–300 GHz) - Dopolnilo A1

General Information

• Status: Not Published
• Public Enquiry End Date: 24-Nov-2024
• ICS: 13.280 - Radiation protection
• ICS: 17.200.20 - Temperature-measuring instruments
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• ICS: 33.100.01 - Electromagnetic compatibility in general
• Technical Committee: INIR - Electromagnetic fields in human enviornment
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 30-Jul-2025
• Due Date: 17-Sep-2025
• Completion Date: 04-Aug-2025
• Directive: 2013/35/EU - Directive 2013/35/EU of the European Parliament and of the Council of 26 June 2013 on the minimum health and safety requirements regarding the exposure of workers to the risks arising from physical agents (electromagnetic fields) (20th individual Directive within the meaning of Article 16(1) of Directive 89/391/EEC) and repealing Directive 2004/40/EC
• Mandate: M/351 - Standardisation mandate addressed to CEN, CENELEC and ETSI to develop harmonized standards for the assessment, measurement and calculation of worker's exposure to static magnetic and varying electric, magnetic and electromagnetic fields with frequencies from 0Hz to 300 GHz
• Ref Project: EN 50413:2019/A1:2025 - Basic standard on measurement and calculation procedures for human exposure to electric, magnetic and electromagnetic fields (0 Hz - 300 GHz)

Relations

• Amends: SIST EN 50413:2021 - Basic standard on measurement and calculation procedures for human exposure to electric, magnetic and electromagnetic fields (0 Hz - 300 GHz)
• Effective Date: 29-Nov-2022

Overview

EN 50413:2019/A1:2025 is the CLC basic standard that specifies general measurement and calculation procedures for assessing human exposure to electric, magnetic and electromagnetic fields in the frequency range 0 Hz–300 GHz. It is tailored for: product emission assessment against public exposure limits in Council Recommendation 1999/519/EC and worker exposure requirements in Directive 2013/35/EU, and for workplace exposure evaluations to determine compliance with Directive 2013/35/EU.

The document addresses quantities measurable external to the body (e.g., electric and magnetic field strength, power density) and also discusses calculation of internal quantities that underpin protection guidance. Where a product- or technology-specific EMF standard exists, that standard should be used in preference to EN 50413.

Key Topics

• Definitions and terminology relevant to exposure assessment and EMF measurement.
• Characteristics of electromagnetic fields across a wide frequency band (0 Hz–300 GHz).
• Measurement of exposure quantities including field strength and power density.
• Instrumentation requirements and methods of calibration to ensure traceable, repeatable results.
• Measurement techniques and procedures for evaluating exposure around products and installations.
• Calculation methods for scenarios where direct measurement is impractical.
• Consideration of signal modulation (new Annex B): guidance on modulation effects, classification of emissions (ITU Radio Regulations), and conversion relationships between carrier power, mean power and peak power for common modulation types.

The amendment adds explicit guidance on how modulation and duty cycle can influence measurement and compliance verification, and includes informative Annex B with classification and conversion tables (e.g., Table B.2) for converting between carrier, mean and peak power notations where necessary.

Applications

EN 50413:2019/A1:2025 is practical for:

• Product manufacturers performing emission testing and preparing conformity evidence against EU exposure limits.
• Test laboratories defining measurement procedures, instrumentation and calibration routines.
• Employers and safety professionals conducting workplace exposure assessments to demonstrate compliance with Directive 2013/35/EU.
• Regulatory authorities and site operators evaluating transmitter characteristics (carrier/mean/peak power, antenna gain/directionality) to support exposure assessments.

Benefits include consistent assessment practices, clearer handling of modulated signals in exposure evaluations, and improved comparability of measured and calculated exposure metrics.

Related Standards

• Council Recommendation 1999/519/EC (public exposure reference levels)
• Directive 2013/35/EU (worker exposure action levels and requirements)
• EN 62311 and other product- or technology-specific EMF standards (see reference list in EN 50413)
• ITU Radio Regulations (classification of emissions and terms used in Annex B)

Practical note: consult any applicable specific standard for the product or technology first; use EN 50413 where no product-specific standard exists or for general measurement and calculation guidance across the 0 Hz–300 GHz range.

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 50413:2021/oprA1:2024
01-november-2024
Osnovni standard za merjenje in izračunavanje izpostavljenosti ljudi električnim,
magnetnim in elektromagnetnim poljem (0 Hz–300 GHz)
Basic standard on measurement and calculation procedures for human exposure to
electric, magnetic and electromagnetic fields (0 Hz - 300 GHz)
Grundnorm zu Mess- und Berechnungsverfahren der Exposition von Personen in
elektrischen, magnetischen und elektromagnetischen Feldern (0 Hz bis 300 GHz)
Norme de base pour les procédures de mesures et de calculs pour l'exposition des
personnes aux champs électriques, magnétiques et électromagnétiques (0 Hz - 300
GHz)
Ta slovenski standard je istoveten z: EN 50413:2019/prA1
ICS:
13.280 Varstvo pred sevanjem Radiation protection
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
SIST EN 50413:2021/oprA1:2024 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN 50413:2021/oprA1:2024
SIST EN 50413:2021/oprA1:2024
EUROPEAN STANDARD DRAFT
EN 50413:2019
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
September 2024
ICS 17.200.20; 33.100.01 -
English Version
Basic standard on measurement and calculation procedures for
human exposure to electric, magnetic and electromagnetic fields
(0 Hz - 300 GHz)
Norme de base pour les procédures de mesures et de Grundnorm zu Mess- und Berechnungsverfahren der
calculs pour l'exposition des personnes aux champs Exposition von Personen in elektrischen, magnetischen und
électriques, magnétiques et électromagnétiques (0 Hz - 300 elektromagnetischen Feldern (0 Hz bis 300 GHz)
GHz)
This draft amendment prA1, if approved, will modify the European Standard EN 50413:2019; it is submitted to CENELEC members for
enquiry.
Deadline for CENELEC: 2024-11-29.

It has been drawn up by CLC/TC 106X.

If this draft becomes an amendment, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this amendment the status of a national standard without any alteration.

This draft amendment was established by CENELEC 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 CEN-CENELEC Management Centre has the same status as the official versions.

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

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 77034 Ref. No. EN 50413:2019/prA1 E

SIST EN 50413:2021/oprA1:2024
EN 50413:2019/prA1:2024 (E)
Contents Page
1 European foreword . 3
2 1 Modification of subclause 5.2.2.5 “Assessment Methods” . 4
3 2 Addition of new Annex B . 4
4 3 Bibliography . 8

SIST EN 50413:2021/oprA1:2024
EN 50413:2019/prA1:2024 (E)
5 European foreword
6 This document [EN 50413:2019/prA1:2024] has been prepared by CLC/TC 106X ” Electromagnetic fields in
7 the human environment “.
8 This document is currently submitted to the Enquiry.
9 The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
SIST EN 50413:2021/oprA1:2024
EN 50413:2019/prA1:2024 (E)
10 1 Modification of subclause 5.2.2.5 “Assessment Methods”
11 Add a new paragraph after the second paragraph:
12 “
13 Signal modulation and duty cycle of the field source can affect the process of measurement or calculation for
14 the purpose of EMF exposure assessment and verification of compliance with the relevant exposure
15 restrictions. To this end, the possible presence of signal modulation should be taken into consideration when
16 carrying out measurements or calculations to determine whether or not relevant limits are met.
17 For maximum modulated signals, Annex B provides information about the relationship between carrier power,
18 mean power and peak power for most types of modulation in use.
19 ”
20 2 Addition of new Annex B
21 Add the following new Annex B:
22 “
23 Annex B
24 (informative)
26 Consideration of different types of radio transmission (modulation)
27 B.1 General
28 This annex discusses some aspects for the assessment of EM fields due to modulated signals of radio-
29 transmitters.
30 B.2 Modulation
31 The presence of modulation should be taken into consideration when carrying out measurements or
32 calculations to determine whether or not the relevant limits are met.
33 B.3 Classification of emissions
34 The Radio Regulations, drawn up by the International Telecommunication Union (ITU), classify the emissions
35 from radio-transmitters according to the required bandwidths, and the basic and optional characteristics of the
36 transmission [B1]. The complete classification consists of nine characters as follows:
37 • Characters 1 – 4 describe the bandwidth, using three digits and one letter;
38 • Characters 5 – 7 describe the basic characteristics, using two letters and one digit;
39 • Characters 8 – 9 describe any optional characteristics, using two letters.
40 In the given context the three basic characteristics are relevant, i.e.:
• type of modulation of the main carrier Character 5;
• nature of the signal(s) which modulate(s) the main carrier Character 6;
• type of information to be transmitted Character 7.
41 Information about the transmitter power supplied to the antenna, the type of modulation, and the gain and
42 directional characteristics of the antenna can be obtained from the transmission authority which is responsible
43 for operating the equipment at a particular site. It is important to know whether the transmitter power is
SIST EN 50413:2021/oprA1:2024
EN 50413:2019/prA1:2024 (E)
44 expressed in terms of the carrier power, P , the mean power, P , or the peak power, P , in order to be able
C M P
45 to compare the measured or calculated values accurately with the derived levels.
46 The following table is based on information given in the Radio Regulations, lists the various characters which
47 are used to classify the three basic characteristics of a radio emission.
48 Table B.1 — Characters used to define the class of emission, based on information given in the Radio
49 Regulations of the International Telecommunication Union (ITU)
C
...