BRITISH STANDARD BS EN 13683:2003 +A2:2011 Incorporating corrigenda June 2013 and October 2015 Garden equipment — Integrally powered shredders/chippers — Safety ICS 65.060.70 BS EN 13683:2003+A2:2011 National foreword This British Standard is the UK implementation of EN 13683:2003+A2:2011, incorporating corrigendum June 2013 It supersedes BS EN 13683:2003+A1:2009, which is withdrawn The start and finish of text introduced or altered by amendment is indicated in the text by tags Tags indicating changes to CEN text carry the number of the CEN amendment For example, text altered by CEN amendment A1 is indicated by Text altered by CEN amendment A2 is indicated by The UK participation in its preparation was entrusted to Technical Committee AGE/20, Powered lawn and garden equipment A list of organizations represented on this committee can be obtained on request to its secretary The 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 26 November 2003 © The British Standards Institution 2015 Published by BSI Standards Limited 2015 ISBN 978 580 91949 Amendments/corrigenda issued since publication Date Comments 30 April 2010 Implementation of CEN amendment A1:2009 30 June 2011 Implementation of CEN amendment A2:2011 31 July 2013 Implementation of CEN corrigendum June 2013: Subclause 5.2.1.3, paragraph replaced 30 November 2015 Implementation of CEN Correction Notice 20 April 2011: main title of Figure updated EUROPEAN STANDARD EN 13683:2003+A2 NORME EUROPÉENNE EUROPÄISCHE NORM March 2011 Incorporating corrigendum June 2013 Supersedes EN 13683:2003+A1:2009 ICS 65.060.70 English Version Garden equipment - Integrally powered shredders/chippers Safety Matériel de jardinage - Broyeurs/déchiqueteurs moteur intégré - Sécurité Gartengeräte - Motorgetriebene Schredder/Zerkleinerer Sicherheit This European Standard was approved by CEN on September 2003 and includes Amendment approved by CEN on 14 March 2009 and Amendment approved by CEN on December 2010 CEN 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 CEN-CENELEC Management Centre or to any CEN 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 CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref No EN 13683:2003+A2:2011: E BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) Contents Page Foreword 4 0 Introduction 5 1 Scope 6 2 Normative references 6 3 Terms and definitions 7 4 List of significant hazards 11 5 5.1 5.2 5.2.1 5.2.2 5.2.3 5.2.4 5.3 5.3.1 5.3.2 5.3.3 5.4 5.4.1 5.4.2 5.4.3 5.5 5.6 5.6.1 5.6.2 5.6.3 5.6.4 5.7 5.8 5.9 5.9.1 5.9.2 5.9.3 5.9.4 5.10 5.10.1 5.10.2 Safety requirements and/or measures 13 General 13 Access to power driven components 13 Feed safety openings 13 Discharge chutes 22 Guards 26 Power driven components except cutting means 26 Hot exhaust surfaces 27 General 27 Test equipment and method of test 27 Test acceptance 27 Controls 29 Location 29 Stopping and starting the power source 29 Identification of controls 29 Protection from exhaust fumes 29 Electrical requirements 29 General 29 Low voltage battery circuits (not including magneto grounding circuits) 29 Overload protection 30 Terminals and uninsulated electrical parts 30 Liquid spillage 30 Transport 30 Verification of safety requirements 30 Test conditions 30 Thrown object test (see 5.2.3.1) 31 Stability 34 Dynamic stability test 34 Noise 35 Noise reduction as a safety requirement 35 Verification of requirements on noise – Noise measurement 35 6 6.1 6.2 6.2.1 6.2.2 6.2.3 6.2.4 Information for use 36 Instruction for use 36 Marking 37 Minimum marking 37 Warning marking 38 Marking durability 38 Test 38 Annex A (informative) #Examples of inlet openings where the safety distance is ≥ 200 mm (see 5.2.1.3)$ 39 Annex B (normative) Test enclosure 42 Annex C (normative) Target panels - Specification for corrugated fibreboard (see 5.9.2) 44 BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) C.1 C.2 C.2.1 C.2.2 C.2.3 C.2.4 C.2.5 Corrugated fibreboard target panel composition 44 Corrugated fibreboard penetration test 44 General 44 Test fixture 44 Corrugated fibreboard samples 44 Procedure 44 Acceptance criteria 45 Annex D (informative) Safety instructions 47 D.1 General 47 D.2 Safe operating practices 47 D.2.1 Training 47 D.2.2 Preparation 47 D.2.3 Operation 48 D.2.4 Maintenance and storage 49 D.2.5 Additional safety instructions for units with bagging attachments 49 Annex E (normative) Symbols and/or pictograms 50 E.1 General 50 E.2 Pictograms 50 Annex F (normative) Noise test code – Engineering method (grade 2) 52 F.1 Scope 52 F.2 A-weighted sound power level determination 52 F.3 A-weighted emission sound pressure level measurement 53 F.4 Requirements for test floor 57 F.4.1 Artificial surface 57 F.4.2 Natural grass 57 F.5 Installation, mounting and operating conditions 57 F.6 Measurement uncertainties and declaration of noise emission values 58 F.7 Information to be recorded and reported 58 Annex G (informative) Example of a material and construction fulfilling the requirements for an artificial surface 59 G.1 Material 59 G.2 Construction 59 Annex ZA (informative) #Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC$ 61 Bibliography 62 BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) Foreword This document (EN 13683:2003+A2:2011) has been prepared by Technical Committee CEN/TC 144 “Tractors and machinery for agriculture and forestry”, the secretariat of which is held by AFNOR This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2011, and conflicting national standards shall be withdrawn at the latest by September 2011 This document includes Amendment 1, approved by CEN on 2009-03-14 and Amendment 2, approved by CEN on 2010-12-13 This document supersedes #EN 13683:2003+A1:2009$ The start and finish of text introduced or altered by amendment is indicated in the text by tags ! " and # $ #deleted text$ This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s) !For relationship with EU Directive(s), see informative #Annex ZA$, which #is an integral part$ of this document." Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights Annexes A, D and G are informative Annexes B, C, E and F are normative This document includes a Bibliography According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) Introduction This document is a type C standard as stated in EN 1070:1998 The machinery concerned and the extent to which hazards, hazardous situations and events are covered are indicated in the scope of this document When provisions of this type C standard are different from those which are stated in type A or B standards, the provisions of this type C standard take precedence over the provisions of the other standards, for machines that have been designed and built according to the provisions of this type C standard BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) Scope This European Standard specifies safety requirements and their verification for the design and construction of hand fed, shredders/chippers with integral power source and with or without vacuum assisted collection which are designed primarily to reduce organic material to smaller pieces It is only applicable to shredders/chippers that are designed for use outdoors in a stationary position by an operator standing on the ground #This standard applies to shredders/chippers with feed intake openings or segments, in this standard referred to as feed safety openings and being of any shape complying with the safety distance requirements of this standard with regard to contact with the cutting means, that in total will fit into a square of 250 mm × 250 mm measured at the plane of the opening(s).$ #deleted text$ This standard describes methods of elimination or reduction of hazards arising from the use of shredders/chippers In addition it specifies the type of information to be provided by the manufacturer on safe working practices This standard does not cover requirements for: units driven by an external power source; mobile use of units which can be used in both stationary and mobile modes; units with powered discharge intended to broadcast material or load vehicles; # units with separate mechanically powered feed intake or attachments;$ units with cutting means of either one or more non-metallic filaments, or one or more non-metallic cutting elements pivotally mounted on a generally circular central drive unit, where these cutting elements rely on centrifugal force to achieve cutting, and have a kinetic energy for each single cutting means of less than 10 J; # electrical powered and battery-powered shredders/chippers.$ Environmental hazards and EMC have not been considered in this standard This standard deals with all significant hazards, hazardous situations and events relevant to shredders/chippers, when they are used as intended (see clause 4) This document is not applicable to shredders/chippers which are manufactured before the date of publication of this document by CEN Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications These normative references are cited at the appropriate places in the text and the publications are listed hereafter For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision For undated references the latest edition of the publication referred to applies (including amendments) #deleted text$ BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) #EN 953:1997+A1:2009, Safety of machinery — Guards — General requirements for the design and construction of fixed and movable guards$ EN 954-1:1996, Safety of machinery — Safety-related parts of control systems — Part 1: General principles for design EN 1070:1998, Safety of machinery — Terminology #EN 61032:1998, Protection of persons and equipment by enclosures — Probes for verification (IEC 61032:1997)$ EN ISO 354:2003, Acoustics — Measurement of sound absorption in a reverberation room (ISO 354:2003) EN ISO 3744:1995, Acoustics — Determination of sound power levels of noise sources using sound pressure — Engineering method in an essentially free field over a reflecting plane (ISO 3744:1994) EN ISO 11201:1995, Acoustics — Noise emitted by machinery and equipment — Measurement of emission sound pressure levels at a work station and at other specified positions — Engineering method in an essentially free field over a reflecting plane (ISO 11201:1995) EN ISO 11688-1:1998, Acoustics — Recommended practice for the design of low-noise machinery and equipment — Part 1: Planning (ISO/TR 11688-1:1995) EN ISO 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic terminology, methodology (ISO 12100-1:2003) EN ISO 12100-2:2003, Safety of machinery — Basic concepts, general principles for design — Part 2: Technical principles (ISO 12100-2:2003) #EN ISO 13849-1:2008, Safety of machinery — Safety-related parts of control systems — Part 1: General principles for design (ISO 13849-1:2006) EN ISO 13857:2008, Safety of machinery — Safety distances to prevent hazard zones being reached by upper and lower limbs (ISO 13857:2008)$ ISO 3767-1:1998, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment — Symbols for operator controls and other displays — Part 1: Common symbols ISO 3767-3:1995, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment — Symbols for operator controls and other displays — Part 3: Symbols for powered lawn and garden equipment ISO 3767-4:1993, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment — Symbols for operator controls and other displays — Part 4: Symbols for forestry machinery ISO 3864-1:2002, Graphical symbols — Safety colours and safety signs — Part 1: Design principles for safety signs in workplaces and public areas ISO 11684:1995, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment — Safety signs and hazard pictorials — General principles Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 1070:1998 and the following apply BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) 11) not tamper with the power source governor settings; the governor controls the safe maximum operating speed and protects the power source and all moving parts from damage caused by over-speed Seek authorised service if a problem exists; 12) not transport this machine while the power source is running; 13) shut off the power source and disconnect the spark plug lead (electric unit disconnect from supply) whenever you leave the work area; 14) not tilt the machine while the power source is running D.2.4 Maintenance and storage a) when the machine is stopped for servicing, inspection, or storage, or to change an accessory, shut off the power source, disconnect the spark plug wire from the spark plug (electric unit disconnect from supply), make sure that all moving parts have come to a complete stop and, where a key is fitted remove the key Allow the machine to cool before making any inspections, adjustments, etc b) store the machine where fuel vapour will not reach an open flame or spark For extended storage periods, run the unit dry of fuel Always allow the machine to cool before storing; c) when servicing the cutting means be aware that, even though the power source will not start due to the interlock feature of the guard, the cutting means can still be moved by a manual starting mechanism D.2.5 Additional safety instructions for units with bagging attachments a) shut-off the power unit before attaching or removing the bag 49 BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) Annex E (normative) Symbols and/or pictograms E.1 General The safety symbols and pictograms which may be used on hand fed powered shredder/chippers as defined in this European Standard are presented in this annex Symbols shall follow the conventions laid down in ISO 3767-1:1998, ISO 3767-3:1995, ISO 3767-4:1993 and ISO 3864-1:2002 while the pictograms shall follow the conventions presented in ISO 11684:1995 The symbol or pictogram size may be modified to fit a specific machine design The pictograms or symbols presented are not all-inclusive E.2 Pictograms Figure E.1 — "Read operator's manual" 50 Figure E.2 — “Danger - Rotating blades Keep hands and feet out of openings while machine is running.” BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) Figure E.3 — "Keep bystanders away” Figure E.4 — "Wear ear protection" Figure E.5 — "Wear eye protection" Figure E.6 — "Wear eye and ear protection" # Figure E.7 — "Do not use as a step"$ 51 BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) Annex F (normative) Noise test code – Engineering method (grade 2) F.1 Scope This noise test code specifies the information necessary to carry out efficiently and under standardised conditions the determination of the noise emission characteristics of integrally powered shredders/chippers Noise emission characteristics include the emission sound pressure level at the operator position and the sound power level The determination of these quantities is necessary for: manufacturers to declare the noise emitted; comparing the noise emitted by machines in the family concerned; purposes of noise control at the source at the design stage The use of this noise test code ensures reproducibility of the determination of the noise emission characteristics within specified limits determined by the grade of accuracy of the basic noise measurement method used Noise measurement methods allowed by this standard give results with Grade of accuracy F.2 A-weighted sound power level determination For the determination of A-weighted sound power level, EN ISO 3744:1995 shall be used subject to the following modifications or additional requirements: reflecting surface shall be replaced by an artificial surface which complies with F.4.1 or by natural grass which complies with F.4.2 Reproducibility of results using natural grass is likely to be lower than that required for Grade of accuracy In the case of dispute, measurements shall be carried out in the open air and on the artificial surface; measurement surface shall be a hemisphere with a radius, r, of m; microphone array shall be six microphone positions as defined in Figure F.1 and Table F.1; environmental conditions shall be within the limits specified by the manufacturers of the measuring equipment The ambient air temperature shall be in the range from °C to 30 °C and the wind speed shall be less than m/s and preferably less than m/s; for measurements in the open air K2A shall be taken as 0; for measurements indoors the value of K2A, determined without artificial surface and in accordance with annex A of EN ISO 3744: 1995, shall be ≤ dB, in which case K2A shall be taken as 52 BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) F.3 A-weighted emission sound pressure level measurement For the measurement of the A-weighted emission sound pressure level EN ISO 11201:1995 shall be used subject to the following modifications or additional requirements: reflecting surface shall be replaced by an artificial surface which complies with F.4.1 or by natural grass which complies with F.4.2 Reproducibility of results using natural grass is likely to be lower than that required for Grade of accuracy In the case of dispute, measurements shall be carried out in the open air and on the artificial surface; environmental conditions shall be within the limits specified by the manufacturers of the measuring equipment The ambient air temperature shall be in the range from °C to 30 °C, and the wind speed shall be less than m/s and preferably less than m/s; microphone shall be mounted at a height of (1600 ± 50) mm above the ground and positioned (700 ± 20) mm from the vertical centre line of the main feed intake opening as specified in Figure F.2 If the discharge is centrally downwards the microphone shall be located in line with any auxiliary feed intake opening If the discharge is not centrally downwards the microphone shall be o positioned at 180 to the direction of the discharge 53 BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) Dimensions in metres Key r radius of hemisphere Figure F.1 — Microphone positions on the hemisphere (see Table F.1) 54 BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) Table F.1 — Co-ordinates of microphone positions Position No X r Y r Z + 0,7 - 0,7 - 0,7 + 0,7 - 0,27 + 0,27 + 0,7 + 0,7 - 0,7 - 0,7 + 0,65 - 0, 65 1,5 m 1,5 m 1,5 m 1,5 m 0,71 r 0,71 r 55 BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) Microphones numbered to are not exactly on the hemisphere but a little bit outside For the determination of the measured sound power level: microphones shall be set at the positions specified in Table F.1; the area of the measurement surface to take into account is that of a hemisphere with a radius of 4m, so assuming that all microphones are on this hemisphere Dimensions in millimetres Key Direction of discharge to be in line with the X axis of the microphone co-ordinate system Microphone Main feed intake opening Auxiliary feed intake opening Ground surface Discharge direction Centre of microphone co-ordinate system NOTE For purposes of clarity the machine is not drawn to scale and is shown without ground supports etc Figure F.2 — Microphone position for measurement of sound pressure at the operator’s ear and location of machine with respect to the microphone co-ordinate system 56 BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) F.4 Requirements for test floor F.4.1 Artificial surface The artificial surface shall have absorption coefficients as given in Table F.2, measured in accordance with EN ISO 354:2003 F.2 — Absorption coefficients Frequencies in Hz 125 250 500 000 000 000 Absorption Coefficients 0,1 0,3 0,5 0,7 0,8 0,9 Tolerance ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 ± 0,1 The artificial surface shall be placed on a hard, reflecting surface and have a size of at least 3,6 m × 3,6 m placed at the centre of the test environment The construction of the supporting structure shall be such that the requirements for the acoustic properties are also met with the absorptive material in place The structure shall support the operator to avoid compression of the absorbing material NOTE See annex G for example of a material and construction which can be expected to fulfil these requirements F.4.2 Natural grass The test environment shall be covered, at least for the horizontal projection of the measurement surface used, with high quality natural grass Before the measurements are taken, the grass shall be cut with a mower to a height of cut as near as possible to 30 mm The surface shall be clean of grass clippings and debris and shall be visibly free of moisture, frost and snow F.5 Installation, mounting and operating conditions Measurements shall be carried out on a new, normal production machine featuring standard equipment as provided by the manufacturer If a collector is provided or available for the machine from the manufacturer, it shall not be fitted For engines: engine shall be run-in and warmed up until stable conditions are reached before the test is commenced; carburettor and ignition shall be set according to the instructions of the manufacturer For electric motors supplied from mains: machine shall be run until stable conditions are reached before the test is commenced; rated voltage of the upper limit of the rated voltage range and/or frequency shall be maintained during the test at 0,98 to 1,02 times the stated values The supply voltage of mains powered machines is measured at the plug of the cable or cord supplied, not at the plug of any extension cable or cord 57 BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) For electric motors supplied from batteries: noise measurements shall be started with fully charged batteries as specified by the manufacturer but shall not be continued when the battery voltage under load drops to lower than 0,9 times the battery voltage under load at the beginning of the measurements for lead-acid batteries, or to lower than 0,8 times for other batteries; battery voltage shall be measured at the battery terminals The test shall be carried out at the maximum operating speed (see 3.9) An engine/motor speed indicator shall be used to check the speed of the engine It shall have an accuracy of ± 2,5 % of the reading The indicator and its engagement with the shredder/chipper shall not affect the operation during the test The shredder/chipper shall be in the normal stationary position on a horizontal surface and shall be tested using pieces of dry pine (12 x 24 x 200) mm1 for each test cycle The operator shall stand in the designated operating position2 and shall drop the test pieces simultaneously into the feed intake opening The operator shall remain stationary while the measurements are made Where there is more than one feed intake opening each opening shall be tested separately Measurements shall only be made while there are test pieces in the machine and shall be of not less than 10 s duration If necessary additional pairs of test pieces may be dropped into the machine in order to achieve a 10 s measurement period All results except that from the feed intake opening giving the highest result shall be disregarded For the sound power level determination, the cutting means shall be above the centre of the hemisphere F.6 Measurement uncertainties and declaration of noise emission values When measuring the sound power level or the emission sound pressure level at the operator position, tests shall be repeated to attain the required grade of accuracy, and until three consecutive Aweighted results give values within not more than dB The arithmetic average of these shall be the measured A-weighted sound power level or the emission sound pressure level of the machine respectively The uncertainties associated with the measurements shall be taken into account when deciding on the declared noise emission values NOTE The methodology used for taking uncertainties into account should be based on the use of measured values and measurement uncertainties The latter are the uncertainty associated to the measurement procedure (which is determined by the grade of accuracy of the measurement method used) and the production uncertainty (variation of noise emission from one machine to another of the same type made by the same manufacturer) F.7 Information to be recorded and reported The information to be recorded and reported is that required by EN ISO 3744:1995 and EN ISO 11201:1995 These test pieces are different from that specified in the Directive 2000/14/EC on Noise of Equipment used Outdoors because it is known that these test pieces give repeatable results as they not significantly slow down the machine and are not influenced by the operator In the case that the machine being tested does not chip the test pieces the pieces should be left inside the machine untouched by any outside means until the measurements have been completed The operator should not stand between the machine and any microphone 58 BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) Annex G (informative) Example of a material and construction fulfilling the requirements for an artificial surface G.1 Material Mineral fibre, 20 mm thick, having an airflow resistance of 11 kN.s/m and a density of 25 kg/m G.2 Construction As is shown in Figure G.1, the artificial flooring of the measurement site is sub-divided into nine joint planes, each of approximately #1,20 m × 1,20 m$ The backing layer (a) of the construction as shown in Figure G.1 consists of chipboard, 19 mm thick, coated with a plastics material on both sides Such boards are used, for example, for the construction of kitchen furniture The cut edges of the chipboards should be protected against moisture by applying a coat of plastic paint The outsides of the flooring are bordered by a two-legged aluminium section (d), its leg height being 20 mm Sections of this profile material are also screwed to the edges of the joint planes where they serve as spacers and attachment points On the middle joint plane on which the machine is placed during measurement as well as any other place on which the operator can get to stand on, aluminium T-sections (c) with a leg length of 20 mm are mounted as spacers These sections also provide exact markings which facilitate the alignment of the machine in the middle of the measurement site The prepared boards are then covered with the insulating felt material (b) cut to size The felt flooring of the joint planes which are neither stood on nor driven over (type A surface in Figure G.1) are covered with a simple wire mesh fastened to the edge strips and to the attachment points; for this purpose, the sections should be provided with holes Thus, the material is adequately attached, but it remains possible to replace the felt material should it become soiled As a wire mesh, a so-called aviary wire (e) with a mesh width of 10 mm and a wire diameter of 0,8 mm has proved to be suitable This wire appears to protect the surface adequately without affecting the acoustic conditions Protection by simple wire mesh is not, however, sufficient in the area subjected to traffic (type B surface in Figure G.1) For these surfaces, the use of wire grating of corrugated steel wire (f) with a diameter of 3,1 mm and a mesh width of 30 mm has proved to be suitable The construction of the measurement site as described above offers two advantages: it can be prepared without much time and effort, and all the materials are easily obtainable The fact that the microphone positions are not situated directly above the flooring of the measurement site allows the microphones to be easily mounted on stands, assuming that the ground is even and hard as, for example, an asphalt or concrete site When arranging the microphones, account has to be taken of the fact that the height of the microphones has to be determined in relation to the surface of the flooring of the measurement site It shall, therefore, be 40 mm higher when measuring from the ground under the microphone 59 BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) Dimensions in millimetres (unless otherwise stated all dimensions are approximate) Key A B a b This surface is not suitable to carry weight Do not stand on or drive over This surface is suitable to carry weight May be stood on or driven over Backing layer of plastics coated chipboard (nominally 19 thick) Mineral wool fibre layer (nominally 20 thick) c Aluminium T-sections (nominally thick × 20 high) d Aluminium U-sections (nominally thick × 20 high) e Wire mesh (nominally 10 × 10 mesh made of 0,8 diameter steel wire) f Wire grating (nominally 30 × 30 mesh made of 3,1 diameter steel wire) Figure G.1 — Sketch of the measurement surface covered with an artificial surface (not to scale) 60 BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) Annex ZA (informative) #Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association to provide a means of conforming to Essential Requirements of the New Approach Directive 2006/42/EC on machinery Once this standard is cited in the Official Journal of the European Union under that Directive and has been implemented as a national standard in at least one Member State, compliance with the normative clauses of this standard confers, within the limits of the scope of this standard, a presumption of conformity with the relevant Essential Requirements, except Essential Requirements 1.5.1 limited to electrically driven machines, 1.5.11 and 1.7.4.2 second sentence of the fourth paragraph of u, of that Directive and associated EFTA regulations WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling within the scope of this standard.$ 61 BS EN 13683:2003+A2:2011 EN 13683:2003+A2:2011 (E) Bibliography [1] EN 563, Safety of machinery — Temperatures of touchable surfaces — Ergonomics data to establish temperature limit values for hot surfaces [2] EN 60335-1:1998, Safety of household and similar electrical appliances — Part 1: General requirements ((IEC 60335-1:1983, modified)) [3] EN ISO 11691:1995, Acoustics — Measurement of insertion loss of ducted silencers without flow — Laboratory survey method (ISO 11691:1995) [4] EN ISO 11820:1996, Acoustics — Measurements on silencers in situ (ISO 11820:1996) 62 This page deliberately set blank