EN 62233:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Verfahren zur Messung der elektromagnetischen Felder von Haushaltgeräten und ähnlichen Elektrogeräten im Hinblick auf die Sicherheit von Personen in elektromagnetischen FeldernMéthodes de mesures des champs électromagnétiques des appareils électrodomestiques et similaires en relation avec l'exposition humaineMeasurement methods for electromagnetic fields of household appliances and similar apparatus with regard to human exposure97.030VSORãQRDomestic electrical appliances in generalICS:Ta slovenski standard je istoveten z:EN 62233:2008SIST EN 62233:2008en,de01-julij-2008SIST EN 62233:2008SLOVENSKI
STANDARDSIST EN 50366:2004/A1:2006SIST EN 50366:20041DGRPHãþD

EUROPEAN STANDARD EN 62233 NORME EUROPÉENNE
EUROPÄISCHE NORM April 2008
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
© 2008 CENELEC -
All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62233:2008 E
ICS 97.030 Supersedes EN 50366:2003 + A1:2006Incorporates corrigendum August 2008
English version
Measurement methods for electromagnetic fields of household appliances and similar apparatus with regard to human exposure (IEC 62233:2005, modified)
Méthodes de mesures des champs électromagnétiques des appareils électrodomestiques et similaires
en relation avec l'exposition humaine (CEI 62233:2005, modifiée)
Verfahren zur Messung
der elektromagnetischen Felder
von Haushaltgeräten und ähnlichen Elektrogeräten im Hinblick
auf die Sicherheit von Personen
in elektromagnetischen Feldern (IEC 62233:2005, modifiziert)
This European Standard was approved by CENELEC on 2007-12-01. 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, Bulgaria, 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.
- latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement
(dop) 2008-12-01
- latest date by which the national standards conflicting
with the EN have to be withdrawn
(dow) 2012-12-01 Annex ZA has been added by CENELEC. The contents of the corrigendum of August 2008 have been included in this copy. __________ SIST EN 62233:2008

- 3 - EN 62233:2008 Endorsement notice The text of the International Standard IEC 62233:2005 was approved by CENELEC as a European Standard with agreed common modifications as given below. COMMON MODIFICATIONS Contents p Delete “and limit sets” from the title of Clause 4. p Add: Annex ZA (normative) Normative references to international publications with their corresponding European publications 1 Scope
Add the following note: NOTE The methods are not suitable for comparing the fields of different appliances. 3 Definitions p 3.2.1 Delete “(basic limitations)” in the term. Add: 3.2.Z1 operator distance distance between the surface of the appliance and the closest point of the head or torso of the operator 4 Choice of test method and limit sets p Replace the title by: 4 Choice of test method p Delete the first and third paragraphs. p In the fifth paragraph, replace “alternative test methods” by “simplified test methods”. 5 Measuring methods 5.5.1 General p Delete the second sentence of the first paragraph. SIST EN 62233:2008

Frequency10 Hz 50 Hz 150 kHz 400 kHz 16,0800 Hz43,5Transfer function A 0,21,0
NOTE Logarithmic scales are used for both axes. Figure Z1 - Transfer function The following sequence is used for the measurements: − perform a separate measurement of each coil signal; − apply a weighting to each signal using the transfer function; − square the weighted signals; − add the squared signals; − average the sum; − obtain the square root of the average. The result is the weighted r.m.s. value of the magnetic flux density. SIST EN 62233:2008

- 5 - EN 62233:2008 This procedure is shown schematically in Figure Z2.
Sensorcoil x SquareFilter +Br.m.s.Average√ Transfer function A B x Sensorcoil y SquareFilter Transfer function A B y Sensorcoil z SquareFilter Transfer function A B z
Figure Z2 - Schematic diagram of the reference method
NOTE Different ways that the transfer function can be applied to a time domain signal include: analog filter in an electronic circuit, pre-programmed DSP chip, a signal analyser, or a digital computer calculation with a spreadsheet package or a custom-written program. The actual measured value shall be compared directly with the reference level BRL of the flux density at 50 Hz. With appliances with highly localized fields, this has to be performed after taking the coupling factor ac(r1) given in Annex C into account. The final weighted result, W, can be derived as follows:
RLr.m.s.nBBW= or applying the coupling factor ac(r1)
n1cnc).(WraW= where Wn
weighted result for one measurement; Br.m.s r.m.s. value of the magnetic flux density; BRL reference level of the magnetic flux density at fC0; ac(r1) coupling factor according to Annex C or Table D.3. Wnc
weighted result for one measurement taking the coupling of the inhomogeneous field into account by applying ac(r1). The determined weighted result W shall not exceed the value 1. 5.5.3 Line spectrum evaluation p Delete the paragraph starting with “For drawing a comparison…” just before the last note.
Figures p In Figure 1 replace “5.5.4
Alternative test methods” by “5.5.4
Simplified test methods”. SIST EN 62233:2008

- 7 - EN 62233:2008 Annex A, Test conditions for the measurement of magnetic flux density A.1 General p Delete the second paragraph and the NOTE. A.1.1 Operating condition p Replace the title by: A.1.1 Operating conditions, if not specified in Table A.1 p Replace the last-but one paragraph by: Controls are adjusted to the highest setting. However, pre-set controls are used in the intended position. The measurements are made while the appliance is energized. A.1.2 Measuring distance p Replace the title by: A.1.2 Measuring distance, if not specified in Table A.1 A.1.3 Sensor location p Replace the title by: A.1.3 Sensor location, if not specified in Table A.1 A.2.3 Measuring distance and sensor location p Replace the first two paragraphs and Table A.1 by: NOTE The measuring distances in Table A.1 have been defined based upon the expected location of the operator during normal operation, to protect against effects on central nervous system tissues in the head and trunk of the body. SIST EN 62233:2008

Measuring distance r1 cm Sensor locations Operating conditions Coupling factorac(r1) 1 = 0,1 S/m 8 Hz . 800 Hz a Appliances not mentioned in the table Operator distance All surfaces As specified in EN 55014-1 See Annex C Air cleaners 30 All surfaces Continuously 0,17 Air conditioners 30 Around Continuously. When cooling lowest temperature setting. When heating highest temperature setting 0,18 Battery chargers (including inductive) 30 All surfaces Charging a discharged battery having the highest capacity specified by the manufacturer
0,15 Blankets 0 Top Spread out and laid on a sheet of thermal insulation
0,19 Blenders 30 Around Continuously, no load 0,16 Citrus presses 30 Around Continuously, no load 0,15 Clocks 30 Around Continuously 0,15 Coffee makers 30 Around As specified in 3.1.9 of EN 60335-2-15 0,16 Coffee mills 30 All surfaces As specified in 3.1.9.108 of
EN 60335-2-14 0,15 Convector heaters 30 Around With highest output 0,20 Deep fat fryers 30 Around As specified in 3.1.9 of EN 60335-2-13 0,16 Dental hygiene appliances 0 All surfaces As specified in 3.1.9 of EN 60335-2-52 0,19 Depilators 0 Against cutter Continuously, no load 0,30 Dishwashers 30 Top, front Without dishes in the washing mode and drying mode 0,18 Egg boilers 30 Around As specified in 3.1.9 of EN 60335-2-15 0,15 Electric and electronic controls for track sets 30 All surfaces Continuously 0,17 Facial sauna appliances 10 Top Continuously 0,12 Fans 30 Front Continuously 0,16 Fan heaters 30 Front Continuously, highest heat setting 0,16 Floor polishers 30 All surfaces Continuously without any mechanical load on the polishing brushes 0,19 Food processors 30 Around Continuously without load, highest speed setting 0,17 Food warming cabinets 30 Front Continuously without load, highest heat setting 0,15 SIST EN 62233:2008

- 9 - EN 62233:2008 Type of appliance
Measuring distance r1 cm Sensor locations Operating conditions Coupling factorac(r1) 1 = 0,1 S/m 8 Hz . 800 Hz a Foot warmers 30 Top Continuously without load, highest heat setting 0,15 Gas heating appliances, wall mounted 30 Front, left and right side
Continuously, highest heat setting with pump in operation
0,16 Gas heating appliances, floor standing 30 Front, left and right side
Continuously, highest heat setting with pump in operation
0,20 Gas igniters 30 All surfaces Continuously 0,15 Grills 30 Around Continuously without load, highest heat setting 0,16 Hair clippers 0 Against cutter Continuously without load 0,30 Hairdryers 10 All surfaces Continuously, highest heat setting 0,12 Heat pumps 30 Around Continuously. When cooling lowest temperature setting. When heating highest temperature setting 0,17 Heating mats 30 Top Spread out and laid on a sheet of thermal insulation
0,15 Heating pads 0 Top Spread out and laid on a sheet of thermal insulation
0,14 Hobs 30 Top, front As specified in 3.1.9 of EN 60335-2-6 but with highest setting, each heating unit separately 0,18 Hotplates 30 Around As specified in 3.1.9 of EN 60335-2-9 but with highest setting, each heating unit separately 0,17 Icecream makers 30 Around Continuously without load, lowest temperature setting 0,18 Immersion heaters 30 Around Heating element fully submerged 0,16 Induction hobs and hotplates See A.3.1 See A.3.1 See A.3.2.
Irons 30 All surfaces As specified in 3.1.9 of EN 60335-2-3 0,15 Ironing machines 30 All surfaces As specified in 3.1.9 of EN 60335-2-44 0,19 Juice extractors 30 Around Continuously without load 0,17 Kettles 30 Around Half-filled with water
0,17 Kitchen scales 30 Around Continuously without load 0,14 Knives 30 All surfaces Continuously without load 0,16 Massage appliances 0 Against the massage head Continuously without load, highest speed setting 0,21 SIST EN 62233:2008

Measuring distance r1 cm Sensor locations Operating conditions Coupling factorac(r1) 1 = 0,1 S/m 8 Hz . 800 Hz a Microwave ovens 30 Top, front Continuously with highest
microwave power setting. Conventional heating elements, if available, are operated simultaneously at their highest setting. The load is 1 l of tap water, placed in the centre of the shelf. The water container is made of electrically non-conductive material such as glass or plastic.
0,17 Mixers 30 All surfaces Continuously without load, highest speed setting 0,16 Oil filled radiators 30 Around Continuously, highest heat setting 0,20 Ovens 30 Top, front Oven empty with door closed, thermostat being at the highest setting. Also in the cleaning mode, if available, as described in the instructions for use. 0,20 Ranges 30 Top, front Each function separately 0,20 Range hoods 30 Bottom, front Controls at highest setting 0,19 Refrigeration appliances 30 Top, front Continuously with the door closed. The thermostat is adjusted to lowest temperature setting. The cabinet is empty. The measurement is made after steady conditions have been reached but with active cooling in all compartments. 0,18 Rice cookers 30 Around Half-filled with water, without lid and highest heat setting 0,16 Shavers 0 Against cutter Continuously without load 0,30 Slicing machines 30 All surfaces Continuously without load, highest speed setting 0,17 Solaria - parts touching
the body - other parts
Around
Around
Continuously, highest settings
Continuously, highest settings
0,18
0,20 Spin extractors 30 Top, front Continuously without load 0,18 Storage heaters 30 Around Continuously, highest heat setting 0,20 Tea makers 30 Around Continuously, no load 0,16 Toasters 30 Around Without load, highest heat setting 0,16 Tools, hand-guided 30 Around,
unless the same side is always towards the user No-load, all settings e.g. speed set to maximum.
0,15 Tools, hand-held 30 Around,
unless the same side is always towards the user No-load, all settings e.g. speed set to maximum.
0,15 SIST EN 62233:2008
- 11 - EN 62233:2008 Type of appliance
Measuring distance r1 cm Sensor locations Operating conditions Coupling factorac(r1) 1 = 0,1 S/m 8 Hz . 800 Hz a Tools, transportable 30 Top and side towards the user No-load, all settings e.g. speed set to maximum.
0,16 Tools with heating elements 30 Around,
unless the same side is always towards the user Highest temperature setting. Glue guns with glue stick in working position 0,15 Tumble dryers 30 Top, front Drum filled with textile material having a mass in the dry condition of 50 % of the maximum load. The textile material consists of pre-washed double-hemmed cotton sheets approximately 70 cm ×70 cm cm having a mass between 140 g/m² and
170 g/m² in the dry condition. The material is soaked with water of a mass of 60 % of that of the textile material. 0,18 Vacuum cleaners, handheld 30 All surfaces As specified in 3.1.9 of EN 60335-2-2 0,16 Vacuum cleaners, body sling 0 All surfaces As specified in 3.1.9 of EN 60335-2-2 0,13 Vacuum cleaners, others 30 Around As specified in 3.1.9 of EN 60335-2-2 0,16 Washing machines and washer dryers 30 Top, front Without textiles, in the spinning mode at highest speed 0,18 Water-bed heaters 10 Top Spread out and laid on a sheet of thermal insulation 0,14 Water heaters 30 Around Controls at highest setting, with water flowing, if necessary 0,17 Whirlpool baths - inside - outside
0 30
Around Around
Continuously Continuously
0,18 0,20 a
The worst case coupling factors have been calculated for frequencies up to 800 Hz. For fundamental operating frequencies greater than 800 Hz and lower than 150 kHz, the coupling factor is ac(r1) x 1,25.
p A.3.2 Add after the fifth paragraph: NOTE Z1 Stable operating conditions are reached after the water starts to boil and when the magnetic field or the power on the mains supply is stabilized. SIST EN 62233:2008

Basic restrictions and reference levels The following basic restrictions and reference levels of 1999/519/EC apply. Table B.1 - Basic restrictions for electric, magnetic and electromagnetic fields (0 Hz to 300 GHz) Frequency range
Magnetic flux density
mT Current density
mA/m²
r.m.s. Whole body average
SAR
W/kg Localized SAR (head and trunk) W/kg Localized SAR (limbs)
W/kg Power density, S
W/m² 0 Hz 40
> 0 - 1 Hz
1 - 4 Hz
8/f
4 - 1 000 Hz
1 000 Hz - 100 kHz
f/500
100 kHz - 10 MHz
f/500 0,08 2 4
10 MHz - 10 GHz
0,08 2 4
10 - 300 GHz
10 f is the frequency in Hz.
Table B.2 - Reference levels for electric, magnetic and electromagnetic fields (0 Hz to 300 GHz, unperturbed r.m.s. values) Frequency range
E-field strength
V/m H-field strength
A/m B-field
µT Equivalent plane wave power densityS eq W/m² 0 Hz - 1 Hz - 3,2 ×10 44 ×10 4- 1 Hz - 8 Hz 10 000 3,2 ×10 4 /f²4 ×10 4 /f²- 8 Hz - 25 Hz 10 000 4 000/f5 000/f- 0,025 kHz - 0,8 kHz 250/f 4/f5/f- 0,8 kHz - 3 kHz 250/f 5 6,25 - 3 kHz - 150 kHz 87 5 6,25 - 0,15 MHz - 1 MHz 87 0,73/f 0,92/f - 1 MHz - 10 MHz 87/f1/2 0,73/f 0,92/f - 10 MHz - 400 MHz 28 0,073 0,092 2 400 MHz - 2 000 MHz 1,375 f1/2 0,003 7 f1/20,004 6 f1/2f/2002 GHz - 300 GHz 61 0,16 0,20 10 f is as indicated in the frequency range column. NOTE These limits do not apply for the protection of workers against exposure to electromagnetic fields.
- 13 - EN 62233:2008 Annex C, Determination of coupling factors Step 1 Evaluation of the extent of the hot spot Replace Figure C.1 by:
Bmax (r0 = 0) 0,1 Bmax r0 Step 4 Calculation of the coupling factor Replace the complete text by: The coupling factor ac(r) is the result of the re-scaled factor k and can be determined as followed:
(f)J(f)B1)f,,rk(r,1)f,,r(r,aBRRLcoilcoilc⋅= (C.7) NOTE 1 The term BRL(f)/JBR(f) is proportional 1/f from 8 Hz up to 800 Hz and from 1 kHz to 100 kHz. In consequence the factor ac(r) is frequency independent within these ranges (see Figure C.5). In case of measuring according to 5.5.2 and 5.5.3 a fC0 equivalent is used. Therefore the coupling factor ac(r) evaluates to:
)(fJ)(fB1),f,rk(r,1),f,r(r,ac0BRc0RLc0coilc0coilc⋅= (C.8) NOTE 2 The coupling factor ac (r1) can be determined from Figure C.5 using equation C.4. Example for the re-scaling applying 1999/519/EC at f = 50Hz and σ = 0,1 S/m for the whole body and a coil of rCoil = 10 mm in a distance r = 50 cm. =====S/m) 0.11Hz, 50fmm, 10rcm, 50(racoilc===⋅====Hz) 50(fJHz) 50(fBS/m) 0.11Hz, 50fmm, 10rcm, 50k(rBRRLcoil1635.0/2100/271.322=mmATTmAµ C.2 Graphical evaluation of coupling factors Replace the first paragraph by: The coupling factor can be determined from Figure C.5 using equation (C.4). This method provides a value for the coupling factor depending on the radius of the equivalent coil. SIST EN 62233:2008

Determination of factor k Replace in the first paragraph “Having determined the value of G” by “With the value of G from step 2”. D.4.1 Numerical models for the homogeneous human body Add after the first paragraph: NOTE Based on the German Standard DIN 33 402, Part 2, 1986. D.4.2 Different sources of non-uniform magnetic fields and calculation of the factor k Delete the paragraph starting with “The necessary factor used…“ and the related equation (D.4). Delete EXAMPLE 2. SIST EN 62233:2008

- 15 - EN 62233:2008 Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications 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. NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60335 (mod) Series Household and similar electrical appliances – Safety EN 60335 Series
IEC 61786 – 1) Measurement of low-frequency magnetic and electric fields with regard to exposure of human beings – Special requirements for instruments and guidance for measurements – –
IEC 62311 (mod) – 1) Assessment of electronic and electrical equipment related to human exposure restrictions for electromagnetic fields
(0 Hz – 300 GHz) EN 62311 2008 2)
CISPR 14-1
– 1) Electromagnetic compatibility – Requirements for household appliances, electric tools and similar apparatus – Part 1: Emission EN 55014-1 2006 2)
——————— 1) Undated reference.
2) Valid edition at date of issue.
NORME INTERNATIONALECEIIEC INTERNATIONAL STANDARD 62233Première éditionFirst edition2005-10 Méthodes de mesures des champs électro-magnétiques des appareils électrodomestiques et similaires en relation avec l'exposition humaine
Measurement methods for electromagnetic fields of household appliances and similar apparatus with regard to human exposure
Pour prix, voir catalogue en vigueur For price, see current catalogue IEC 2005
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Web: www.iec.ch CODE PRIX PRICE CODE X Commission Electrotechnique InternationaleInternational Electrotechnical CommissionSIST EN 62233:2008

62233  IEC:2005 – 3 –
CONTENTS FOREWORD.7 INTRODUCTION.11
1 Scope.13 2 Normative references.15 3 Terms and definitions.15 3.1 Physical quantities and units.15 3.2 Terms and definitions.15 4 Choice of test method and limit sets.19 5 Measuring methods.19 5.1 Electric fields.19 5.2 Frequency range.19 5.3 Measuring distances, positions and operating mode.21 5.4 Magnetic field sensor.21 5.5 Measuring procedures for magnetic fields.21 5.6 Measurement uncertainty.29 5.7 Test report.31 6 Evaluation of results.31
Annex A (normative)
Test conditions for the measurement of magnetic flux density.39 Annex B (informative)
Exposure limits.55 Annex C (normative)
Determination of coupling factors.59 Annex D (informative)
Examples using the limits of Annex B.71
Bibliography.87
Figure 1 – Recommendations for the choice of the test method
starting with the evaluation against the reference levels.33 Figure 2 – Example for dependency on frequency of the reference levels
with smoothed edges.35 Figure 3 – Example for a transfer function A corresponding to the reference level
of Figure 2.35 Figure 4 – Schematic diagram of the reference method.37 Figure A.1 – Measuring position: top / front (see 3.2.7).49 Figure A.2 – Measuring position: around (see 3.2.7).49 Figure A.3 – Measuring distances for induction hobs and hotplates.53 Figure C.1 – Hot spot.59 Figure C.2 – Gradient of flux density and integral G.61 Figure C.3 – Equivalent coil position.61 Figure C.4 – Gradients of flux density and coil.63 SIST EN 62233:2008

62233  IEC:2005 – 5 –
Figure C.5 – Coupling factor aC(r) with 0.1 S/m, Asensor=100 cm2,
for the whole human body ( re-scaled using ICNIRP limits).69 Figure D.1 – Measurement of the magnetic flux.73 Figure D.2 – Normalized field distribution along the tangential distance r0.75 Figure D.3 – Numerical model of a homogenous human body.77 Figure D.4 – Details of the construction of the head and shoulders.79 Figure D.5 – Position of source Q against model K.81
Table A.1 – Measuring distances, sensor location and operating conditions.41 Table B.1 – Basic restrictions for general public exposure to time varying
electric and magnetic fields for frequencies up to 10 GHz – Excerpts.55 Table B.2 – Reference levels for general public exposure to time-varying
electric and magnetic fields (unperturbed rms values) – Excerpts.55 Table B.3 – Basic limitations for general public exposure applying
to various regions of the body up to 3 kHz – Excerpts.57 Table B.4 – Magnetic field limits for general public exposure:
exposure of head and torso – Excerpts.57 Table C.1 – Value G [m] of different coils.63 Table C.2 – Value of factor k[TmA2/]at 50 Hz for the whole human body.65 Table D.1 – Transfer function with ICNIRP general public exposure.71 Table D.2 – Transfer function with IEEE general public exposure.71 Table D.3 - Coupling factor ac(r1).73 SIST EN 62233:2008

62233  IEC:2005 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
MEASUREMENT METHODS FOR ELECTROMAGNETIC FIELDS
OF HOUSEHOLD APPLIANCES AND SIMILAR APPARATUS
WITH REGARD TO HUMAN EXPOSURE
FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62233 has been prepared by IEC technical committee 106: Methods for the assessment of electric, magnetic and electromagnetic fields associated with human exposure. The text of this standard is based on the following documents: FDIS Report on voting 106/99/FDIS 106/103/RVD
Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. SIST EN 62233:2008

62233  IEC:2005 – 9 –
The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to the specific publication. At this date, the publication will be
• reconfirmed; • withdrawn; • replaced by a revised edition, or • amended.
62233  IEC:2005 – 11 –
INTRODUCTION This standard establishes a suitable evaluation method for determining the electromagnetic fields in the space around the equipment mentioned in the scope, and defines standardized operating conditions and measuring distances. This document is designed as one method for measurement and assessment of electromagnetic (EM) fields and their potential effect on the human body by reference to exposure standards. Existing exposure standards, e.g. ICNIRP'98 [11]1), IEEE C95.1-1999 [22] and IEEE C95.6-2002 [12], present rules for the exposure of humans to EM fields. The simplest and more practical levels [limits] with which to comply are limits (suitably time-averaged in some cases) on the electric (E) and magnetic (B) fields, measured in the absence of the human to be exposed to these fields. These limits are called maximum permissible exposure levels, IEEE-based levels, or reference levels (ICNIRP). Suitable definitions and specified measurement techniques are applied in any exposure compliance measurement or assessment. Compliance with maximum permissible exposure or reference levels is sufficient for positive assessment of meeting these levels as specified in the appropriate exposure standard. This document addresses the additional measurement and calculation techniques which permit determination of compliance under one set of specified circumstance, without reference to time of exposure or actual exposure conditions. This document is not meant to supplant definitions and procedures specified in exposure standards but is aimed at supplementing the procedure already specified for compliance with exposure.
——————— 1)
Figures in square brackets refer to the Bibliography. SIST EN 62233:2008

62233  IEC:2005 – 13 –
MEASUREMENT METHODS FOR ELECTROMAGNETIC FIELDS
OF HOUSEHOLD APPLIANCES AND SIMILAR APPARATUS
WITH REGARD TO HUMAN EXPOSURE
1 Scope This International Standard deals with electromagnetic fields up to 300 GHz and defines methods for evaluating the electric field strength and magnetic flux density around household and similar electrical appliances, including the conditions during testing as well as measuring distances and positions.
Appliances may incorporate motors, heating elements or their combination, may contain electric or electronic circuitry, and may be powered by the mains, by batteries, or by any other electrical power source. Appliances include such equipment as household electrical appliances, electric tools and electric toys.
Appliances not intended for normal household use but which nevertheless may be approached by the public, or may be used by laymen, are within the scope of this standard.
This standard does not apply to: – apparatus designed exclusively for heavy industrial purposes; – apparatus intended to be part of the fixed electrical installation of buildings (such as fuses, circuit breakers, cables and switches); – radio and television receivers, audio and video equipment, and electronic music instruments; – medical electrical appliances; – personal computers and similar equipment; – radio transmitters; – apparatus designed to be used exclusively in vehicles; The fields of multifunction equipment which is subjected simultaneously to different clauses of this standard and/or other standards shall be assessed using the provisions of each clause/standard for the relevant functions in operation. Abnormal operation of the appliances is not taken into consideration. This standard includes specific elements to assess human exposure: – definition of sensor; – definition of measuring methods; – definition of operating mode for appliance under test; – definition of measuring distance and position. The measurement methods specified are valid from 10 Hz to 400 kHz. In the frequency range above 400 kHz and below 10 Hz appliances in the scope of this standard are deemed to comply without testing unless otherwise specified in IEC 60335 series. SIST EN 62233:2008

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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. IEC 60335 (all parts), Safety of household and similar electrical appliances IEC 61786, Measurement of low-frequency magnetic and electric fields with regard to exposure of human beings – Special requirements for instruments and guidance for measurements IEC 62311, Assessment of electronic and electrical equipment related to human exposure restrictions for electromagnetic fields (0 Hz – 300 GHz)2)
CISPR 14-1, Electromagnetic compatibility – Requirements for household appliances, electric tools and similar apparatus – Part 1: Emission 3 Terms and definitions For the purpose of this standard the following terms and definitions apply. Internationally accepted SI-units are used throughout the standard. 3.1 Physical quantities and units
Quantity Symbol Unit Dimension Conductivity σ Siemens per metre S/m Current density J Ampere per square metre A/m2 Electric field strength E Volt per metre V/m Frequency f Hertz Hz Magnetic field strength H Ampere per metre A/m Magnetic flux density B Tesla T (Wb/m2 or Vs/m2)
3.2 Terms and definitions 3.2.1 basic restriction (basic limitations) restrictions on exposure to time-varying electric, magnetic and electromagnetic fields that are based on established biological effects and include a safety factor. The basic restriction for the current density is JBR, the basic restriction for the internal electric field strength is EBR ——————— 2)
To be published. SIST EN 62233:2008

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3.2.2 coupling factor
ac(r1) factor taking into account the irregularities of the fields around the appliances, the measuring area of the sensor and the dimension of the trunk or head of the operator at measuring distance r1 (refer to 3.2.6)
3.2.3 Fourier transformation mathematical procedure that derives a frequency function from a time function (see IEV 101-13-09) 3.2.4 fast Fourier transformation
FFT speed optimised Fourier transform
3.2.5 hot spot a localized area with a maximum field strength due to inhomogeneity of the field distribution 3.2.6 measuring distance r1
shortest distance from the surface of the appliance to the closest point of the sensor surface (see Annex A) 3.2.7 measuring positions 3.2.7.1
around the sensor is moved all around the appliance at a constant distance of its surface and where persons are expected
NOTE See Figure A.2. 3.2.7.2 top the sensor is moved along a surface at the specified constant distance from the top surface of the appliance
NOTE See Figure A.1. 3.2.7.3 front
the sensor is moved along a surface at the specified distance from the front of the appliance NOTE See Figure A.1.
3.2.8 reference level
maximum permissible exposure level BRL
field level derived from the basic restrictions under worst case assumptions (e.g. exposure to homogeneous field)
NOTE The reference levels may be exceeded providing that the basic restrictions are met. SIST EN 62233:2008

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3.2.9 response time time required for a field-measuring instrument to reach some specified percentage of the final value after being placed in the field to be measured
3.2.10 Weighted result W final result of the measurement, taking the frequency dependent reference level into account
4 Choice of test method and limit sets An appropriate limit set has to be chosen. For all appliances, independent of the spectrum of the produced fields, the procedure in
5.5.2 is applicable. This is the reference method, which has to be used in case of dispute. In case where maximum permissible exposure levels or reference levels are exceeded, in any particular situation of fields, human body position or measurement configuration, the determination of compliance with basic restrictions has to be taken into account. The procedure in
5.5.3 may be applied for appliances producing a line spectrum composed of only one fundamental line and their harmonics lines. For appliances producing significant fields only on the mains frequency and its harmonics, if any, one of the alternative test methods in
5.5.4 may be used. Equipment where the full working cycle is less than 1 s shall be measured according to IEC 62311 for pulsed fields; however operating conditions, measuring distances and coupling factor are given in this standard. A step by step procedure can be applied, from the easiest methods to the more complicated ones, see the flow diagram in Figure 1. 5 Measuring methods 5.1 Electric fields The measurement method is under consideration.
If appliances, with their internal transformer or electronic circuit, are working at voltage lower than 1 000 V,
they are deemed to comply without testing. 5.2 Frequency range The frequency range considered is from 10 Hz to 400 kHz. See Scope (Clause 1). If it is not feasible to cover the frequency range in one measurement, the weighted results of each measured frequency range shall be added. SIST EN 62233:2008

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5.3 Measuring distances, positions and operating mode The measuring distances, sensor locations and opera
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