BS EN 55012:2007 BRITISH STANDARD +A1:2009 Vehicles, boats and internal combustion engines — Radio disturbance characteristics — Limits and methods of measurement for the protection of off-board receivers ICS 27 020; 33 00 ?? ? ? ????? ??????? ??? ?? ???????? ? ?? ? ?? ?? ?? ?????? ? ?? ? ? ?????? ? ??? ? ? ? ? ? ? ? ? ? ? BS EN 55012:2007+A1:2009 National foreword This British Standard is the UK implementation of EN 55012:2007+A1:2009 It is identical to CISPR 12:2007, incorporating amendment 1:2009 It supersedes BS EN 55012:2002 which will be withdrawn September 2010 and BS EN 55012:2007 which will be withdrawn July 2012 The start and finish of text introduced or altered by amendment is indicated in the text by tags Tags indicating changes to IEC text carry the number of the IEC amendment For example, text altered by IEC amendment is indicated by The UK participation in its preparation was entrusted by Technical Committee GEL/210, EMC — Policy committee, to Subcommittee GEL/210/11, EMC product standards A list of organizations represented on this subcommittee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application !" Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 February 2008 © BSI 2010 ISBN 978 580 61545 Amendments/corrigenda issued since publication Date Comments 31 January 2010 Implementation of IEC amendment 1:2009 with CENELEC endorsement A1:2009 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 5501 : 0 7+A1 July 2009 ICS 27.020; 33.1 00.1 Supersedes EN 5501 2:2002 + A1 :2005 English version Vehicles, boats and internal combustion engines Radio disturbance characteristics Limits and methods of measurement for the protection of off-board receivers (CISPR 2:2007) Véhicules, bateaux et moteurs combustion interne Caractéristiques de perturbation radioélectrique Limites et méthodes de mesure pour la protection des récepteurs extérieurs (CISPR 2:2007) Fahrzeuge, Boote und von Verbrennungsmotoren angetriebene Geräte Funkstưreigenschaften Grenzwerte und Messverfahren zum Schutz von aerhalb befindlichen Empfängern (CISPR 2:2007) This European Standard was approved by CENELEC on 2007-09-01 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 CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 050 Brussels © 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 5501 2:2007 E BS EN 55012:2007+A1:2009 –2– Foreword The text of document CISPR/D/322/CDV, future edition of CISPR 2, prepared by CISPR SC D, Electromagnetic disturbances related to electric/electronic equipment on vehicles and internal combustion engine powered devices, was submitted to the IEC-CENELEC parallel Unique Acceptance Procedure and was approved by CENELEC as EN 5501 on 2007-09-01 This European Standard supersedes EN 5501 2:2002 + A1 :2005 The following changes were made with respect to EN 5501 2:2002 + A1 :2005: – deletion of narrowband / broadband determination; – general improvement of wording 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) 2008-06-01 – latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 201 0-09-01 This European Standard has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association and covers essential requirements of EC Directive EMC (2004/1 08/EC) See Annex ZZ Annexes ZA and ZZ have been added by CENELEC Endorsement notice The text of the International Standard CISPR 2:2007 was approved by CENELEC as a European Standard without any modification Foreword to amendment A1 The text of document CISPR/D/354/CDV, future amendment to CISPR 2:2007, prepared by CISPR SC D, Electromagnetic disturbances related to electric/electronic equipment on vehicles and internal combustion engine powered devices, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment A1 to EN 5501 2:2007 on 2009-07-01 The following dates were fixed: – latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 201 0-04-01 – latest date by which the national standards conflicting with the amendment have to be withdrawn (dow) 201 2-07-01 Endorsement notice The text of amendment :2009 to the International Standard CISPR 2:2007 was approved by CENELEC as an amendment to the European Standard without any modification –3– BS EN 55012:2007+A1:2009 CONTENTS INTRODUCTION 6 Scope Normative references Terms and definitions Limits of disturbance 4.1 Determination of conformance of vehicle/boat/device with limits 4.2 Peak and quasi-peak detector limits 4.3 Average detector limit Methods of measurement 5.1 Measuring instrument 5.1 Spectrum analyser parameters 5.1 Scanning receiver parameters 5.1 Antenna types 5.1 Accuracy 5.2 Measuring location requirements 5.2.1 Outdoor test site (OTS) requirements 5.2.2 Absorber lined shielded enclosure (ALSE) requirements 5.2.3 Antenna requirements 5.3 Test object conditions 5.3.1 General 5.3.2 Vehicles and boats 5.3.3 Devices 2 5.4 Data collection Methods of checking for compliance with CISPR requirements 23 6.1 General 6.2 Application of limit curves 6.2.1 Measurements under dry conditions 6.2.2 Measurements under wet conditions 6.3 Evaluation (general) 6.4 Type approval test 6.4.1 Single sample 6.4.2 Multiple samples (optional) 6.5 Surveillance (quality audit) of series production 6.5.1 Single sample 6.5.2 Multiple samples (optional) 6.6 Quick prototype check for development testing (optional, quasi-peak detector emissions only) Annex A (normative) Statistical analysis of the results of measurements Annex B (normative) Procedure to determine an alternative emission limit for measurements at m antenna distance BS EN 55012:2007+A1:2009 –4– Annex C (informative) Antenna and transmission line maintenance and characterization 29 Annex D (informative) Construction features of motor vehicles affecting the emission of ignition noise Annex E (informative) Measurement of the insertion loss of ignition noise suppressors Annex F (informative) Methods of measurement to determine the attenuation characteristics of ignition noise suppressors for high voltage ignition systems Annex G (informative) Flow chart for checking the applicability of CI SPR Annex H (informative) I tems under consideration Annex ZA (normative) Normative references to international publications with their corresponding European publications 54 Annex ZZ (informative) Coverage of Essential Requirements of EC Directives 55 Bibliography Figure – Method of determination of conformance 1 Figure – Limit of disturbance (peak and quasi-peak detector) at m antenna distance Figure – Limits of disturbance (average detector) at m antenna distance Figure – Measuring site (OTS) for vehicles and devices Figure – Measuring site (OTS) for boats Figure – Antenna position to measure emissions – Vertical polarization Figure – Antenna position to measure emissions – Horizontal polarization 20 Figure B – Determination of the maximum antenna angle Figure B – Calculation of the resulting gain reduction a Figure C.1 – Alternate antenna factor determination (1 m antenna distance) 3 Figure E – Test circuit Figure E – General arrangement of the test box Figure E – Details of the test box lid Figure E – Details of the test box Figure E – Straight spark-plug ignition noise suppressor (screened or unscreened) 39 Figure E – Right-angle spark-plug ignition noise suppressor (screened or unscreened) 39 Figure E.7 – Noise suppression spark-plug 39 Figure E – Resistive distributor brush 39 Figure E.9 – Noise suppressor in distributor cap 40 Figure E – Noise suppression distributor rotor 40 Figure E 1 – Noise suppression ignition cable (resistive or reactive) 40 Figure F – Test set-up, side view Figure F – Test set-up, top view 4 Figure F – Pressure chamber with ventilation Figure F – Top view of the set-up of a right-angle ignition noise suppressor for distributors Figure F – Location of high voltage ignition components Figure F – Top view of the test set-up for distributor rotors –5– BS EN 55012:2007+A1:2009 Figu re F – Sid e view of the test set-u p for read y-to-use resistive ign ition cables 49 Table Table Table Table Table Table – Spectrum an alyser param eters – Scann in g receiver param eters – I n ternal com bu stion engine operating speeds 2 A – Statistical factors A – Exam ple of frequ ency sub-bands F – Lim its BS EN 55012:2007+A1:2009 –6– INTRODUCTION There is a specific need for standards to define acceptable radio frequency performance of all electrical/electronic products CI SPR has been developed to serve the road vehicle and related industries with test methods and limits that provide satisfactory protection for radio reception CI SPR has been used for many years as a regulatory requirement in numerous countries, to provide protection for radio receivers in the residential environment It has been extremely effective in protecting the radio environment outside the vehicle –7– BS EN 55012:2007+A1:2009 VEHICLES, BOATS AND INTERNAL COMBUSTION ENGINES – RADIO DISTURBANCE CHARACTERISTICS – LIMITS AND METHODS OF MEASUREMENT FOR THE PROTECTION OF OFF-BOARD RECEIVERS Scope The limits in this I nternational Standard are designed to provide protection for broadcast receivers in the frequency range of 30 MHz to 000 MHz when used in the residential environment Compliance with this standard may not provide adequate protection for new types of radio transmissions or receivers used in the residential environment nearer than m to the vehicle, boat or device Residential Environment NOTE Experience has shown that compliance with this standard may provide satisfactory protection for receivers of other types of transmissions when used in the residential environment, including radio transmissions in frequency ranges other than that specified This standard applies to the emission of electromagnetic energy which may cause interference to radio reception and which is emitted from ! a) vehicles propelled by an internal combustion engine, electrical means or both (see ); b) boats propelled by an internal combustion engine, electrical means or both (see 3.2) Boats are to be tested in the same manner as vehicles except where they have unique characteristics as explicitly stated in this standard; c) devices equipped with internal combustion engines or traction batteries (see 3.3) See Annex G for a flow chart to help determine the applicability of CI SPR " This standard does not apply to aircrafts, household appliances, traction systems (railway, ! tram way and electric trolley bus), or to incomplete vehicles In the case of a dual-m ode trolley bus (e.g propelled by power from either a.c /d.c mains or an internal combustion engine), the internal combustion propulsion system shall be included, but the a.c./d.c mains portion of the vehicle propulsion system shall be excluded from this standard " NOTE Protection of receivers used on board the same vehicle as the disturbance source(s) are covered by CI SPR 25 The measurement of electromagnetic disturbances while the vehicle is connected to power mains for charging is not covered in this standard The user is referred to appropriate IEC and CI SPR standards which define measurement techniques and limits for this condition Annex H lists work being considered for future revisions BS EN 55012:2007+A1:2009 –8– 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 60050-1 61 , International Electrotechnical Vocabulary (IEV) – Chapter 61 : Electromagnetic compatibility CISPR 6-1 -1 :2006, Specification for radio disturbance and immunity measuring apparatus and methods – Part 1-1 : Radio disturbance and immunity measuring apparatus – Measuring apparatus CI SPR 6-1 -3:2004, Specification for radio disturbance and immunity measuring apparatus and methods – Part -3: Radio disturbance and immunity measuring apparatus – Ancillary equipment – Disturbance power CISPR 6-1 -4:2007, Specification for radio disturbance and immunity measuring apparatus and methods – Part -4: Radio disturbance and immunity measuring apparatus – Ancillary equipment – Radiated disturbances CISPR 6-2-3:2006, Specification for radio disturbance and immunity measuring apparatus and methods – Part 2-3: Methods of measurement of disturbances and immunity – Radiated disturbance measurements CISPR 25, Radio disturbance characteristics for the protection of receivers used on board vehicles, boats, and on devices – Limits and methods of measurement Terms and definitions For the purpose of this document, the terms and definitions contained in IEC 60050-1 61 as well as the following apply ! 3.vehicle machine operating on land which is intended to carry persons or goods " NOTE Vehicles include, but are not limited to, cars, trucks, buses, mopeds, agricultural machinery, earth-moving machinery, material-handling equipment, mining equipment, floor treatment machines and snowmobiles 3.2 boat vessel intended to be used on the surface of water, its length being no greater than m ! 3.3 devi ce machine driven by an internal combustion engine which is not primarily intended to carry persons or goods " NOTE Devices include, but are not limited to, chainsaws, irrigation pumps, snow blowers, air compressors, walkbehind floor treatment machines and landscaping equipment 3.4 impu lsive ignition noise unwanted emission of electromagnetic energy, predominantly impulsive in content, arising from the ignition system within a vehicle, boat or device BS EN 55012:2007+A1:2009 – 42 – NOTE Protection against high voltages – The energy of modern transistorized ignition systems is so high that touching the low-voltage side may create dangerous currents in a human body Protection against high-voltage hazards is necessary NOTE Protection of the absorbing clamp – The insulation of the ignition cable through the absorbing clamp may not be sufficient for this application The ignition cable must therefore be housed within the absorbing clamp in insulating pipes In order to stabilize the spark discharge and thus the RF spectrum it is recommended to ventilate the pressure chamber (refer to Figure F.3) A lateral minimum distance to metallic parts (e.g walls) of 400 mm shall be maintained If the set-up is constructed using different parts of sheet metal, good electrical connection between the different parts shall be ensured The ground strap shall have a minimum cross-sectional area of mm , a minimum width of mm and a maximum length of 200 mm The connections of the EUT to the measuring equipment shall be as close to reality as possible F.4 Test procedure Install a measuring spark-plug as defined in Clause F.5 The RF disturbance power is first measured without ignition noise suppressors, then the measurement is repeated with the ignition noise suppressors inserted NOTE Overload protection of the measuring instrument input – During recording the situation without ignition noise suppression, pulses of about kV reach the measuring instrument input This may destroy the measuring instrument The use of a 20 dB attenuator with sufficient voltage/pulse resistance avoids this problem The difference between both measurements is the insertion loss of the ignition noise suppression device BS EN 55012:2007+A1:2009 – 43 – 500 10 a 11 12 000 13 000 14 IEC 727/07 Dimensions in millimetres Ke y Spark-gap provided by a measuring spark-plug according to F.5 Connection to the spark-plug EUT HV ignition cable, not shielded and without suppressive elements Absorbing clamp Transistorized ignition coil system with power supply and pulse frequency generator (negative terminal connected to ground) Wall and floor sheet metal Table and supports, non-metallic HV probe Peak-voltage measuring instrument (e g oscilloscope) 1 Ground strap Pressure chamber with ventilation according to F.3 Measuring cable RF disturbance measuring instrument a is the measuring distance (see F.3) F i g u re F – T e s t s e t-u p , s i d e vi ew BS EN 55012:2007+A1:2009 11 12 10 000 – 44 – a 13 14 500 IEC 728/07 Dimensions in millimetres Ke y Spark-gap provided by a measuring spark-plug according to F.5 Connection to the spark-plug EUT HV ignition cable, not shielded and without suppressive elements Absorbing clamp Transistorized ignition coil system with power supply and pulse frequency generator (negative terminal connected to ground) Wall and floor sheet metal Table and supports, non-metallic HV probe Peak-voltage measuring instrument (e g oscilloscope) 1 Ground strap Pressure chamber with ventilation according to F.3 Measuring cable RF disturbance measuring instrument a is the measuring distance (see F.3) F i g u re F – T e s t s e t-u p , to p vi e w BS EN 55012:2007+A1:2009 – 45 – IEC 729/07 Key Pressure chamber Throttle valve with attenuator (ventilation requirements to be evaluated empirically) Measuring spark-plug Connection for oil- and waterfree pressurized inert gas Figure F.3a – General vi ew 30 R /8 ∅ 6,5 M1 × ,5 15 b 35 12 65 IEC 730/07 Dimensions in millimetres b = M1 × , M1 × ,25, or M1 × ,25 Values not specified may be selected by the manufacturer Material: metal Figure F.3b – Cross-sectional view Figure F.3 – Pressure chamber with ventilation BS EN 55012:2007+A1:2009 F.5 – 46 – Measuring spark-plugs without suppression elements A measuring spark-plug shall be used to evaluate ignition noise suppressors, designed as part of the spark-plug assembly or by some other technique (for example, resistive ignition cables) All spark-plugs without ignition noise suppression according to the relevant standards ISO 91 9, ISO 2344, ISO 2704 and ISO 2705 may be used The electrode gap shall be adjusted to 0, mm ± 0, mm F.6 Test set-up examples Because of the high variety of different geometrical dimensions of suppression elements, the connection (see item in Figure F 4, for example) shall be agreed between manufacturer and user F.6.1 Connection of a right-angle spark-plug ignition noise suppressor a IEC 731/07 Dimensions in millimetres Key a Spark-gap provided by a measuring spark-plug according to F.5 Connection EUT Absorbing clamp Wall sheet metal is the measuring distance (see F.3) NOTE The HV ignition cable to the absorbing clamp must be as short as possible Figure F.4 – Top view of the set-up of a right-angle ignition noise suppressor for distributors – 47 – F.6.2 BS EN 55012:2007+A1:2009 Connection of a distributor rotor a 00 30 18 16 19 15 00 IEC 732/07 Dimensions in millimetres Key Spark-gap provided by a measuring spark-plug according to F.5 Connection EUT HV ignition cable, not shielded and without suppressive elements Absorbing clamp Wall sheet metal Metallic ground plane Wall sheet metal (7), ground plane sheet metal (1 5), adaptor part (1 9) and original shaft end (1 8) well connected electrically and in terms of RF Original shaft end Adaptor part a is the measuring distance (see F 3) Figure F.5 – Location of high voltage ignition components BS EN 55012:2007+A1:2009 – 48 – 15 max 00 IEC 733/07 Dimensions in millimetres Key Spark-gap provided by a measuring spark-plug according to F.5 Connection EUT Wall sheet metal Metallic ground plane Figure F.6 – Top view of the test set-up for distributor rotors F.6.3 Connection of distributor caps with integrated ignition noise suppressors Because of the high variety of different geometrical dimensions of distributor caps, the complete test set-up shall be agreed upon between manufacturer and user F.6.4 F.6.4.1 Connection of resistive ignition cables Ready-to-use resistive ignition cables Ready-to-use ignition cables shall be measured with their original length l; the measuring distance shall be chosen as a = l + 20 mm The connection between the EUT and the nonsuppressive HV ignition cable shall be protected by insulating material against touching Its minimum distance to the absorbing clamp shall be 50 mm BS EN 55012:2007+A1:2009 – 49 – 50 I 17 17 a IEC 734/07 Dimensions in millimetres Key Spark-gap provided by a measuring spark-plug according to F.5 Connection EUT HV ignition cable, not shielded and without suppressive elements Absorbing clamp Wall sheet metal Table and supports, non-metallic 17 Protective insulation and ready-to-use protective cap a is the measuring distance (see F.6.4.1 ) l is the length of the ready-to-use resistive ignition cable Figure F.7 – Side view of the test set-up for ready-to-use resistive ignition cables F.6.4.2 Resistive ignition cables not ready-to-use These cables shall be measured preferably with a measuring distance of a = 0,5 m The length of the EUT is measured from the connection (item in Figure F.1 ) to the ignition system (item in Figure F.1 ) BS EN 55012:2007+A1:2009 F.7 – 50 – Reference documents ISO 91 9:1 998, head housings Road vehicles – M1 × , 25 spark-plugs with flat seating and their cylinder ISO 2344:1 998, Road vehicles – M1 × , 25 spark-plugs with conical seating and their cylinder head housings ISO 2704:1 998, Road vehicles – M1 × spark-plugs with flat seating and their cylinder head ISO 2705:2006, Road vehicles – M1 × , 25 spark-plugs with flat seating and their cylinder housings head housings BS EN 55012:2007+A1:2009 – 51 – An n ex G (informative) F l o w c h a rt fo r c h e c ki n g th e a p p l i c a b i l i t y o f C I S P R This chart is intended to assist with determining whether a particular product is covered by this international standard In case of conflict between this chart and Clause , Clause shall take precedence ! Road vehicle, or boat or machine with an internal combustion engine or electric motor NO NO I s it a road vehicle except for an electric trolley bus ? Does it operate on land or surface of water? YES CI SPR does not apply (may be covered by other CI SPR publications) YES YES I s it a train, electric trolley bus , medical device, boat longer than m? NO YES I s it powered from electrical mains (except for battery charging)? NO NO I s it powered by an internal combustion engine? YES CI SPR applies vehicles, boats and devices NO Is it self-propelled ? YES IEC 225 /08 I n the case of a dual-mode trolley bus (e g propelled by power from either a.c./d c mains or an internal combustion engine), the a.c./d.c mains portion of the vehicle propulsion system shall be excluded from this standard Connection to the electrical mains is the work of another CI SPR subcommittee Automatic battery powered cleaners are the work of another CI SPR subcommittee " BS EN 55012:2007+A1:2009 – 52 – Annex H (informative) Items under consideration H.1 Introduction This annex contains future work items that are under consideration H.2 Frequency range As further work progresses in CISPR A and CISPR H, this will be reviewed and CISPR updated accordingly H.3 Measurement uncertainty This topic will be considered for future revisions of this standard H.4 Operation conditions for electrically driven boats As sufficient experience is available on this topic, it will be included in CISPR H.5 Necessity of Annexes E and F For the next edition of CISPR 2, consideration will be given to removing Annexes E and F if there is no further need for them within the industry H.6 Correlation between OTS and ALSE measurements A method needs to be defined for future editions of this document – 53 – BS EN 55012:2007+A1:2009 Bibliography CISPR 6-1 :1 999, Specification for radio disturbance and immunity measuring apparatus and methods – Part 1: Radio disturbance and immunity measuring apparatus ) CI SPR 6-3, 2003: Specification for radio disturbance and immunity measuring apparatus and methods – Part 3: CISPR technical reports Amendment (2005) Amendment (2006) _ ——————— ) Withdrawn in 2003 and replaced by documents CI SPR 6-1 -1 to CI SPR 6-1 -5 BS EN 55012:2007+A1:2009 – 54 – 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 When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies Publication Year Title EN/HD Year IEC 60050-1 61 -1 ) International Electrotechnical Vocabulary (IEV) Chapter 61 : Electromagnetic compatibility - - CISPR 6-1 -1 2006 Specification for radio disturbance and EN 5501 6-1 -1 immunity measuring apparatus and methods Part -1 : Radio disturbance and immunity measuring apparatus - Measuring apparatus 2007 CISPR 6-1 -3 2004 Specification for radio disturbance and EN 5501 6-1 -3 immunity measuring apparatus and methods Part -3: Radio disturbance and immunity measuring apparatus - Ancillary equipment Disturbance power 2006 CISPR 6-1 -4 2007 Specification for radio disturbance and EN 5501 6-1 -4 immunity measuring apparatus and methods Part -4: Radio disturbance and immunity measuring apparatus - Ancillary equipment Radiated disturbances 2007 CISPR 6-2-3 2006 Specification for radio disturbance and EN 5501 6-2-3 immunity measuring apparatus and methods Part 2-3: Methods of measurement of disturbances and immunity - Radiated disturbance measurements 2006 CISPR 25 -1 ) Radio disturbance characteristics for the protection of receivers used on board vehicles, boats, and on devices Limits and methods of measurement 2003 2) 1) 2) Undated reference Valid edition at date of issue EN 55025 – 55 – BS EN 55012:2007+A1:2009 Annex ZZ (informative) Coverage of Essential Requirements of EC Directives This European Standard has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association and within its scope the standard covers all relevant essential requirements as given in Annex I, Article (a) of the EC Directive 2004/1 08/EC Compliance with this standard provides one means of conformity with the specified essential requirements of the Directive concerned WARNING: Other requirements and other EC Directives may be applicable to the products falling within the scope of this standard BS EN 55012:2007 +A1:2009 BSI - 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