EN 50420:2006

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Osnovni standard za ocenjevanje izpostavljenosti ljudi elektromagnetnim sevanjem samostojnih oddajnikov (30 MHz–40 GHz)Grundnorm für die Berechnung und Messung der Exposition von Personen gegenüber elektromagnetischen Feldern von einzelnen Rundfunksendern (30 MHz bis 40 GHz)Norme pour le calcul et la mesure de l'exposition des personnes aux champs électromagnétiques provenant des émetteurs de radiodiffusion isolés (30 MHz - 40 GHz)Basic standard for the evaluation of human exposure to electromagnetic fields from a stand alone broadcast transmitter (30 MHz - 40 GHz)17.240Merjenje sevanjaRadiation measurements13.280Varstvo pred sevanjemRadiation protectionICS:Ta slovenski standard je istoveten z:EN 50420:2006SIST EN 50420:2006en01-december-2006SIST EN 50420:2006SLOVENSKI
STANDARD
EUROPEAN STANDARD EN 50420 NORME EUROPÉENNE
EUROPÄISCHE NORM June 2006
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
© 2006 CENELEC -
All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50420:2006 E
ICS 13.280
English version
Basic standard for the evaluation of human exposure to
electromagnetic fields from a stand alone broadcast transmitter
(30 MHz - 40 GHz)
Norme pour le calcul et la mesure de l'exposition des personnes aux
champs électromagnétiques provenant des émetteurs de radiodiffusion isolés
(30 MHz - 40 GHz)
Grundnorm für die Berechnung und Messung der Exposition von Personen gegenüber elektromagnetischen Feldern von einzelnen Rundfunksendern
(30MHz bis 40 GHz)
This European Standard was approved by CENELEC on 2005-12-06. 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, 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.
This European Standard was prepared by Technical Committee CENELEC TC 106X, Electromagnetic fields in the human environment.
The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50420 on 2005-12-06. 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)
2007-01-01 – latest date by which the national standards conflicting with the EN have to be withdrawn
(dow)
2009-01-01 __________ SIST EN 50420:2006

- 3 - EN 50420:2006 Contents 1 Scope.4 2 Normative references.4 3 Physical quantities, units and constants.5 3.1 Quantities.5 3.2 Constants.5 4 Terms and definitions.5 5 Applicability of compliance assessment methods.9 5.1 Introduction.9 5.2 Assessment procedure.9 5.3 Representative antennas for each service.11 6 SAR measurement and calculation.11 6.1 Whole-body SAR implicit compliance.11 6.2 SAR compliance.11 7 Electromagnetic field measurement.11 7.1 Measurement.11 7.2 Uncertainty.12 8 Electromagnetic field calculation.15 8.1 Field regions.15 8.2 Calculation models.16 9 Contact currents measurement and calculation.17 10 Induced current measurement and calculation.17 Annex A (normative)
Field volume measurement.18 Annex B (informative)
Compliance boundary examples.21
Figure 1 – Alternative routes to calculate E-field, H-field values at point of investigation.15 Figure A.1 – Block diagram of the EUT measurement system.18 Figure A.2 – Cylindrical, cartesian and spherical co-ordinates defined relative to the EUT.19
Table 1 – Applicable methods for each antenna region.10 Table 2 – Representative antennas for each service.11 Table 3 – Recommended parameters .12 Table 4 – Representative antennas for each service.14 Table B.1 – Compliance boundary examples.22 SIST EN 50420:2006

The objective of the standard is to specify, for such equipment operating in typical conditions, the method for assessment of compliance distances according to the basic restrictions (directly or indirectly via compliance with reference levels) related to human exposure to radio frequency electromagnetic fields. 2 Normative references 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.
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)
EN 504131), Basic standard on measurement and calculation procedures for human exposure to electric, magnetic and electromagnetic fields (0 Hz - 300 GHz)
EN 50421, Product standard to demonstrate the compliance of stand alone broadcast transmitters with the reference levels or the basic restrictions related to public human exposure to radio frequency electromagnetic fields (30 MHz - 40 GHz)
EN 55016-4-2, Specification for radio disturbance and immunity measuring apparatus and methods – Part 4-2: Uncertainties, statistics and limit modelling – Uncertainty in EMC measurements (CISPR 16-4-2)
EN ISO/IEC 17025:2000, General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025:1999)
European Commission Enterprise Directorate General Standardisation Mandate addressed to CEN, CENELEC, and ETSI in the field of electro-technology, information technology and telecommunications M/305 Brussels
IEEE Std C95.1:1999, IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz
International Commission on Non-Ionizing Radiation Protection, Guidelines for Limiting Exposure to Time-Varying Electric, Magnetic, and Electromagnetic Fields (up to 300 GHz), Health Physics Vol. 74, No 4, pp 494-522, 1998
ISO Guide to the expression of uncertainty in measurement, 1995
1) At draft stage. SIST EN 50420:2006

- 5 - EN 50420:2006
3 Physical quantities, units and constants 3.1 Quantities The internationally accepted SI-units are used throughout the standard.
Quantity Symbol Unit Dimensions Current density J ampere per square metre A/m² Electric field strength E volt per metre V/m Electric flux density D coulomb per square metre C/m² Electric conductivity σ siemens per metre S/m Frequency f hertz Hz Magnetic field strength H ampere per metre A/m Magnetic flux density B tesla (Vs/m²) T Mass density ρ kilo per cubic metre kg/m³ Permeability µ henry per metre H/m Permittivity ε farad per metre F/m Specific absorption rate
SAR watt per kilogram W/kg Wavelength λ metre m Temperature T kelvin K 3.2 Constants Physical constant
Magnitude
Speed of light in a vacuum
c 2,997 x 108 m/s
Permittivity of free space ε0 8,854 x 10-12 F/m
Permeability of free space µ0 4 π x 10-7 H/m
Impedance of free space 0η 120 π (approx. 377) Ω
4 Terms and definitions For the purposes of this document, the following terms and definitions apply.
4.1 antenna device that serves as a transducer between a guided wave (e.g. coaxial cable) and a free space wave, or vice versa 4.2 basic restriction restrictions on exposure to time-varying electric, magnetic, and electromagnetic fields that are based directly on established health effects. In the frequency range from 30 MHz to 10 GHz, the physical quantity used is the specific absorption rate. Between 10 GHz and 40 GHz, the physical quantity is the power density SIST EN 50420:2006

- 7 - EN 50420:2006 4.12 isotropy e.g., of a hypothetical receiving or transmitting antenna is, having equal intensities in all directions. Deviations of isotropy have to be considered at all measured values of EMF with regard to various angles of incidence and polarization of the measured field In this document it is defined for incidences covering a hemisphere centred at the tip of the probe, with an equatorial plane normal to the probe and expanding outside the probe. The axial isotropy is defined by the maximum deviation of the measured quantity when rotating the probe along its main axis with the probe exposed to a reference wave with normal incidence with regard to the axis of the probe. The hemispherical isotropy is defined by the maximum deviation of the measured quantity when rotating the probe along its main axis with the probe exposed to a reference wave with varying angles of incidences and polarisation with regard to the axis of the probe in the half space in front of the probe 4.13 linearity e.g. of an antenna or any other technical device is showed, when all relationships between a reference quantity and the deviations of this quantity lie along a straight line. The maximum deviation over the measurement ran
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