Bsi bs en 12852 2001 + a1 2010

EUROPÄISCHE NORM May 2010 English Version Food processing machinery - Food processors and blenders - Safety and hygiene requirements Machines pour les produits alimentaires - Préparat

This British Standard is the UK implementation of

EN 12852:2001+A1:2010 It supersedes BS EN 12852:2001 which is withdrawn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 !"

The UK participation in its preparation was entrusted by Technical Committee MCE/3, Safeguarding of machinery, to Subcommittee MCE/3/5, Food industry machines

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, having

been prepared under the

direction of the Engineering

Sector Committee, was

published under the authority

of the Standards Committee

and comes into effect on

EUROPÄISCHE NORM

English Version

Food processing machinery - Food processors and blenders -

Safety and hygiene requirements

Machines pour les produits alimentaires - Préparateurs

culinaires et blenders - Prescriptions relatives à la sécurité

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 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

C O M I T É E U R O P É E N D E N O R M A L I S A T I O N

E U R O P Ä I S C H E S K O M I T E E FÜ R N O R M U N G

Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2010 CEN All rights of exploitation in any form and by any means reserved Ref No EN 12852:2001+A1:2010: E

Contents

Foreword 3



Introduction 4



1





2





3





3.1





3.2





4





4.1





4.2





4.3





4.4





4.5





4.6





5





5.1





5.2





5.3





5.4





5.5





5.6





6





7





7.1

 !



7.2





7.3





Annex A (normative) Noise test code for food processors and blenders (grade 2 of accuracy) 24



Annex B (normative) Principles of design to ensure the cleanability of food processors and blenders 26



Annex C (informative) Interlocking device combined with the food processor cover when this is removable 46



Annex ZA (informative) !!Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC" 48



Bibliography 49



Foreword

!This document (EN 12852:2001+A1:2010) has been prepared by Technical Committee CEN/TC 153

“Machinery intended for use with foodstuffs and feed”, the secretariat of which is held by DIN."

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 November 2010, and conflicting national standards shall be withdrawn at the latest

by November 2010

This document includes Amendment 1, approved by CEN on 2010-03-25

This document supersedes EN 12852:2001

The start and finish of text introduced or altered by amendment is indicated in the text by tags!"͘

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

It is one of a series of standards on the design and construction of machines used in catering:

 vegetable cutting machines;

 catering attachments for machines having an auxiliary drive hub;

 food processors and blenders;

 hand-held blenders and whisks;

 beam mixers;

 salad dryers;

 vegetable peelers;

 cooking kettles equipped with stirrer and/or mixer

!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."

!deleted text"

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

Introduction

The use of food processors and blenders generates various mechanical and other risks

!Their extensive use in numerous countries justifies the need of a standard covering both safety and the hazards

to food hygiene

This European Standard is a type C standard as stated in EN ISO 12100."

The machinery concerned and the extent to which hazards, hazardous situations and events are covered are indicated in the scope of this standard

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

1 Scope

1.1 This European Standard specifies the safety and hygiene requirements for the design and manufacture of

food processors and blenders

It applies to food processors and blenders having a bowl which is stationary while the food is being processed The total volume of the bowl is less than or equal to 150 l

The machines covered by this standard are intended to carry out various types of operations such as: mincing, mixing, blending, whipping, using a large number of products and raw materials, and which are used in food and catering industries such as restaurants, hotels, coffee shops and pubs

!This European Standard specifies all significant hazards, hazardous situations and events relevant to food processors and blenders, when they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer (see Clause 4)

This European Standard deals with the hazards which can arise during commissioning, operation, cleaning, removal of food blockages, feeding, changing the tools, maintenance and decommissioning of the machine."

1.2 This standard does not apply to:

 domestic machines;

 machinery dedicated to food industrial processing (e.g pet food, cannery industry, industrial meat processing) Small machines called "shakers" which are dedicated to blending liquid, with an impellor, usually driven from above are excluded

!deleted text"

!1.3 This European Standard is not applicable to food processors and blenders which are manufactured before

the date of its publication as EN."

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

EN 614-1:2006, Safety of machinery — Ergonomic design principles — Part 1: Terminology and general principles

EN 953, Safety of machinery — General requirements for the design and construction of fixed and movable guards

EN 1005-3, Safety of machinery — Human physical performance — Part 3: Recommended force limits for

machinery operation

EN 1088:1995, Safety of machinery — Interlocking devices associated with guards — Principles for design and

selection

EN 1672-2:2005, Food processing machinery — Basic concepts — Part 2: Hygiene requirements

EN 60204-1:2006, Safety of machinery — Electrical equipment of machines — Part 1: General requirements (IEC

60204:2005, modified)

EN 60529:1991, Degrees of protection provided by enclosures (IP code)

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 4287:1998, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Terms,

definitions and surface texture parameters (ISO 4287:1997)

EN ISO 4871:1996, Acoustics — Declaration and verification of noise emission values of machinery and equipment

(ISO 4871:1996)

EN ISO 11201:1995, Acoustics — Noise emitted by machinery and equipment — Measurement of emission sound

pressure levels at the 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 and specifications (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 the upper

and lower limbs (ISO 13857:2008)"

3 Terms and definitions - Description

3.1 Terms and definitions

!For the purposes of this document, the terms and definitions given in EN ISO 12100-1:2003 and the following apply."

L is the distance between the upper edge of the aperture and the upper blade of the tool D is the circumscribed

diameter of the aperture

For those machines, three types are defined:

 type 1: machines for which Vt < 5 l

 type 2: machines for which 5 l ≤ Vt≤ 25 l and with a total power rating P ≤ 3 kW

 type 3: machines for which 25 l < Vt≤ 150 l or with a total power rating P > 3 kW

4 !List of significant hazards

4.2.1 Access to the danger zones

Mechanical hazards arise from contact with the moving tool, the tilting device and the drive mechanism (see figure 4)

The hazards may arise by:

 zone 1: reaching into the bowl and contacting the moving tool

Hazard of cutting fingers;

 zone 2: tool drive shaft

Hazard of cutting fingers with rotating shaft;

 zone 3: access to the drive mechanism

Hazard of crushing hands;

 zone 4: tilting zone of the bowl

Hazard of crushing arms and hands;

 zone 5: ejection of blades in the event of breakage

Hazard of cutting or penetration to body

Figure 4a — On a blender Figure 4b — On a food processor

Figure 4c — Zone 4 - On a food processor with tilting bowl

Figure 4 — Danger zones 4.2.2 Loss of stability

Hazards of crushing and impact to the body

4.2.3 Incorrect assembly and fitting

Hazards of cutting and impact to the fingers or hands

4.2.4 Handling, cleaning and storage of cutting devices

Hazards of cutting and impact to the fingers and hands

4.3 Electrical hazards

Hazards of electric shock by direct or indirect contact with live parts

4.4 Hazards generated by neglecting hygiene principles in machine design

4.4.1 Hazards to the operator

Hazards from the food being processed, e.g inhalation of flour, sugar, … and from the cleaning agents used to disinfect the machine

NOTE See also !prCEN/TR 1672-1" which deals with the hygiene risk to the operator

4.4.2 Hazards to the consumer

Inability to clean food and splash areas effectively and thoroughly

Contamination of the food by undesirable materials including residues of food, microbiological organisms as well as residues of cleaning and disinfecting fluids

4.5 Hazards generated by neglecting ergonomic principles in machine design

Neglecting ergonomic principles can cause mistakes in operation of controls or physical injury to the operator due

to over-reaching, heavy loads, awkward posture, etc

4.6 Noise

Noise may be a hazard resulting in:

 permanent loss of hearing;

 tinnitus;

 tiredness, stress, etc

5 !Safety and hygiene requirements and/or protective measures

5.1 General

Machinery shall comply with the safety requirements and/or protective measures of this clause

In addition, the machine shall be designed according to the principles of EN ISO 12100-2 for relevant but not significant hazards, which are not dealt with by this European Standard

For hazards which are to be reduced by the application of the type B-standards such as EN 614-1, EN 953,

EN 1005-3, EN 1088, EN 60204-1, EN 60529, EN ISO 12100, EN ISO 13849-1 and EN ISO 13857, the manufacturer shall carry out a risk assessment to establish the requirements of the type B-standard This specific risk assessment shall be part of the general risk assessment of the machine."

5.2 Mechanical hazards

!deleted text"

5.2.1 !Access to danger zones (see Figure 4)

5.2.1.1 General

All the interlocking devices associated with guards shall comply with 5.7 of EN 1088:1995

Fixed and movable guards shall comply with EN953

The level of safety of the interlocking devices shall be consistent with the control systems into which they are integrated

The safety related parts of the control systems shall meet at least performance level c and category 1 in accordance with EN ISO 13849-1:2008

NOTE The category 1 in accordance with EN ISO 13849-1:2008 is equivalent to category 1 of EN 954-1:1996

Instructions about the use and the maintenance of these devices shall be provided in the instruction handbook."

Specific user needs mean that the minimum safety distances cannot comply with !EN ISO 13857", in particular, if an aperture is needed to add some ingredients such as fruits, vegetables, butter, eggs during processing For this reason specific dimensions shall be respected for type 1 and type 2 machines

Dimensions shall be L ≥ 120 mm and D ≤ 52 mm (see figures 1 and 2)

!This requirement can be achieved by integral guards (see Figure 5) or by interlocking removable covers or lids Where interlocking removable covers or lids are used, this interlocking shall be achieved according to 3.25.6 of

EN ISO 12100-1:2003, 5.3.2.5 of EN ISO 12100-2:2003 and EN 1088:1995."

Figure 5 — Bowl with integral guard (example)

5.2.1.2.2 Type 2

Dimensions shall be L ≥ 120 mm and D ≤ 52 mm (see figures 1 and 2)

!This requirement can be achieved by integral guards or by interlocking removable covers or lids Where interlocking removable covers or lids are used, this interlocking shall be achieved according to 3.25.4 and 3.25.5 of

EN ISO 12100-1:2003, 5.3.2.3 b) of EN ISO 12100-2:2003 and EN 1088:1995."

For machines with hinged covers, the distance the cover may be opened whilst the machine is running, measured

at the opposite side of the hinge, shall be no more than 45 mm

The stopping time shall be less than 4 s when the machine is running empty

Covers are generally hinged to the main body of the machine because of their weight Some covers may be also removable to facilitate their use

!Covers shall be associated with an interlocking device in accordance with 3.25.4 and 3.25.5 of

EN ISO 12100-1:2003 and 5.3.2.3 b) of EN ISO 12100-2:2003."

With non-removable covers, the interlocking device shall comply with 6.2.1 of EN 1088:1995

With completely removable covers, the interlock shall comply with EN 1088 (i.e there shall be two interlock switches one operating in a positive mode and the other one in a negative mode) Where the application of this principle of positive mechanical action is not easily reconcilable with the other requirements for this kind of machine, e.g hygiene, index of protection (IP), prevention of defeat and safety distances, the absence of a positive mechanical action of the cover on the position detector shall be balanced/compensated so as to achieve an equal level of safety e.g by applying the principle illustrated in informative annex C

Nevertheless in all cases where a single mechanically actuated position detector is used, it shall comply with 6.2.1.2 of EN 1088:1995

!The safety distances from the upper edge of the aperture to the upper blade of the tool shall comply with Table 4 and 4.2.4.3 of EN ISO 13857:2008."

The stopping time shall be less than 4 s when the machine is running empty

If the bowl is removable, an interlocking device shall prevent the machine from starting with bowl incorrectly fitted

5.2.1.5 Zone 5

The shape and fixing of the blades shall prevent accidental blade ejection The connection between the cutter blades and their support shall be ensured by a positive mechanical means taking account of the direction, of centrifugal force Relying on frictional connection alone is not sufficient

5.2.2 Stability

The machine shall be stable when used in accordance with the manufacturer's intended use

The machine shall be preferably designed to be stable and shall meet the tests specified in table 1 of clause 6

If the machine cannot comply with the tests of table 1, clause 6, it shall be fixed and the instruction handbook shall indicate the value of forces at fixing points

A machine fitted with 3 castors shall have at least 1 castor (or set of castors) fitted with a locking device

A machine fitted with 4 castors shall have at least 2 castors (or sets of castors) fitted with a locking device

5.2.3 Incorrect assembly and fitting

The design of the machine shall ensure that removable parts which provide safeguards in accordance with this standard are in the correct position before the machine can be set in motion

In addition, means of assembly and proper adjustment in good conditions shall be provided in the instruction handbook

If it can lead to a hazardous situation, incorrect assembly and fitting of the cutting device shall be prevented by design (e.g by use of mechanically interlinked components)

5.2.4 Handling, cleaning and storage of cutting devices

The manufacturer shall provide suitable instructions for the safe handling, cleaning and storage of the cutting devices

5.3 !Electrical hazards

5.3.1 General

Electrical equipment, for example switches, that may be exposed to water, e.g during cleaning, shall be protected

to an appropriate IP rating according to EN 60529 and EN 60204-1

The electrical equipment shall comply with EN 60204-1:2006 and with the requirements from 5.3.2 to 5.3.7 5.3.2 Safety requirements related to electromagnetic phenomena

The machines shall have sufficient immunity to electromagnetic disturbances to enable them to operate safely as intended and not fail to danger when exposed to the levels and types of disturbances intended by the manufacturer

The manufacturer of the machines shall design, install and wire the equipment and sub-assemblies taking into account the recommendations of the suppliers of these sub-assemblies

5.3.3 Protection against electric shock

The electrical equipment shall comply with Clause 6 of EN 60204-1:2006

5.3.4 Power circuits

Devices for detection and interruption of over-current shall be applied to each live conductor in compliance with

EN 60204-1:2006, 7.2.3 In case of single phase machines, no such device is required for the earthed neutral conductor

5.3.5 Protection against earth faults in control circuits

For machinery supplied from a single-phase conductor and an earthed neutral conductor, there is no requirement for double pole interruption of the control circuit The single pole interruption shall be in the phase conductor (see 9.4.3.1 of EN 60204-1:2006)

Machines shall be fitted with at least one emergency stop (see 10.7 of EN 60204-1:2006), as far as the risk assessment carried out by the manufacturer doesn't allow to establish that such a device would not reduce the stopping time, or would not enable the special measures, required to deal with the risk, to be taken

In general no emergency stop is required for food processors and blenders In this case particular attention shall be given to the accessibility of the normal OFF switch from the operator position

Where a motor has a degree of protection lower than IP23 it shall be mounted inside an enclosure (see 14.2 of

EN 60204-1:2006) that guarantees a minimum degree of protection of IP23."

Key

1: Food area 2: Splash area

Figure 6 — Hygiene areas

The following parts shall be considered to be in the food area as defined in !EN 1672-2:2005":

 the inside of the bowl;

 the tool set;

 the inner part of the lid covering the bowl;

 the scraping devices

However some parts of the food area, for example cutting devices, the shaft and the components are not easy to clean and special instructions shall be provided for cleaning (see !7.2")

The following parts shall be considered to be in the splash area as defined in !EN 1672-2:2005":

 exterior of the bowl;

 exterior of the cover or lid;

 handles;

 stop and start controls

5.4.4 Non food area

The non food area includes any other areas other than splash areas and food areas outlined above

The maximum roughness values shall comply with the requirements of !EN 1672-2:2005" and annex B

5.4.6 Cleanability

All food and splash areas shall be easily cleanable and where necessary capable of disinfection

In the food and splash areas, fixings such as screws, bolts, rivets etc shall be avoided unless technically necessary These should be chosen from those in figure B.17 of annex B

NOTE Because of the problem of contamination the machines are not intended to be cleaned with waterjet

!(see 7.1 e))"

5.5 !Ergonomics

Regard shall be given to the safeguards set out in 4.8 of EN ISO 12100-2:2003 and EN 614-1:2006 Any information necessary to achieve the ergonomic objectives which the user have to follow (e.g height of feed chute) shall be included in the instruction handbook

The effort for tilting the bowl shall be 200 N maximum (see 4.2.1 of EN 1005-3:2002)."

5.6 Noise

The machines shall be so designed and constructed that risks from airborne noise emission are reduced to the lowest level by particularly applying measures at source to control noise, see for example EN ISO 11688-1:1998 The success of the applied noise reduction measures is assessed on the basis of the actual noise emission values (see annex A) in relation to other machines of the same family

For these machines the major sound sources are the motor and the rotating blades

6 Verification of safety and hygiene requirements and/or measures

!This clause contains the methods of testing for the presence and adequacy of the safety requirements stated in Clause 5 All safety measures of Clause 5 contain self-evidence criteria of acceptance

Verification of the requirements can be made by means of inspection, calculation or testing These shall be applied

to a machine in a fully commissioned condition but partial dismantling may be necessary for the purpose of some checks Such partial dismantling shall not invalidate the result of verification

Methods of verification are given in Table 1."

! Table 1

5.2.1 Visual inspection and measurement, including the devices and instructions to users concerning

handling the cutting device to avoid cuts

Functional test of interlocking devices

5.2.2 Unfixed machines with the bowl full of water taking into account the most unfavourable

conditions shall be tilted 10° from the horizontal plane in the most unfavourable direction It shall return to the horizontal plane

5.2.3 Visual inspection

5.3 Verification shall be in accordance with Clause 18 of EN 60204-1:2006

5.4 In accordance with Annex B

7 Information for use

7.1 !General

Information for use shall meet the requirements of Clause 6 of EN ISO 12100-2:2003 An instruction handbook shall be provided."

7.2 Instruction handbook

!The instruction handbook shall meet the requirements of 6.5 of EN ISO 12100-2:2003."

It shall indicate to the user the conditions of installation, use and maintenance (generally defined by the supplier of the electric/electronic equipment) to be met in order to achieve the electromagnetic compatibility

It shall include at least the following information:

a) information relating to transport, handling and storage:

 of the machine;

 of the tools provided so as to reduce the risk from cuts and impact

b) information relating to installation in particular:

 !checking the supply disconnecting device is correct for the appliance and in compliance with 5.3 of

EN 60204-1:2006;"

 checking the supply is suitable for the appliance;

 checking the connecting cable is the correct size;

 checking there is equi-potential earth bonding to any metal support for the appliance;

 any special installation requirements

c) information relating to commissioning in particular:

 assembly and mounting conditions;

 information about prevention measures which have to be taken by the user

d) information relating to the equipment itself, in particular:

 nominal volume(s) of the bowl depending on food processed;

 detailed description of the equipment, its fittings, its guards and/or safety devices;

 comprehensive range of applications for which the machines are intended and prohibited usages if any;

 machine weight and component weights if the machine is supplied in parts;

!

 the instruction handbook (and any sales literature describing the performances of the machine) shall contain the following information on airborne noise emissions, determined and declared in accordance with Annex A:

 the A-weighted emission sound pressure level at workstations, where this exceeds 70 dB(A); where this level does not exceed 70 dB(A), this fact shall be indicated;

 the peak C-weighted instantaneous sound pressure value at workstations, where this exceeds 63 Pa (130 dB in relation to 20 µPa);

 the A-weighted sound power level emitted by the machinery, where the A-weighted emission sound pressure level at workstations exceeds 80 dB(A)

Whenever sound emission values are indicated the uncertainties "K" surrounding these values shall be

specified The operating conditions of the machinery during measurement and the measuring methods used shall be described."

 data about electrical equipment !(see 17.2 of EN 60204-1:2006)" and electrical wiring diagram;

 value of the overcurrent protective device in the case of machines covered by !5.3.5"

e) information relating to the normal operating conditions:

 arrangements which the user has to take to ensure the machine is stable as required in !5.2.2";

 any limitation on hosing the machine or immersing it because of limits of protection given by the IP rating provided;

 any ergonomic considerations which user may take account of (see !5.5");

 method of cleaning food areas, splash areas and non-food areas;

 dismantling of guards and their components, including the fasteners and the correct method of cleaning (with regard to safety considerations), if any;

 special instructions for the cleaning of tools, fixed plates and their components

f) information for maintenance

The maintenance manual shall include:

 information on the hazard of residual voltage especially from capacitors;

 the lubrication drawing, frequency of operations and list of products to be used;

 instructions to isolate the machine in a safe condition in the event of the need to repair or maintain it;

 a list and identification of spare parts;

 electrical diagrams;

!

 if need be: the description of the adjustment and maintenance operations to be carried out by the user and the preventive maintenance measures to be observed;

 if need be: instructions designed to enable adjustment and maintenance to be carried out safely, including the protective measures to be taken during these operations."

!

g) stability of the machine:

 the limits that shall be respected and the measures to be taken for ensuring stability during use, transportation, assembly, dismantling when out of service, testing or foreseeable breakdowns;"

!

h) accident or breakdown of the machine:

 the operating method to be followed in the event of accident or breakdown; if a blockage is likely to occur, the operating method to be followed so as to enable the equipment to be safely unblocked."

7.3 Marking

!The machinery shall be marked permanently and legibly with at least the following:"

 !the business name and full address of the manufacturer and, where applicable, his authorised representative;"

!

 designation of the machinery;"

 !mandatory marking1 );"

 !the year of construction, that is the year in which the manufacturing process is completed;"

 designation of series or type;

 serial number, if any;

 rating information (voltage in volts, frequency in hertz, rating in kilowatts)

Annex A (normative)

Noise test code for food processors and blenders

(grade 2 of accuracy)

A.1 Sound measurements

A.1.1 Emission sound pressure level determination

EN ISO 11201:1995 shall be used for the determination of the emission sound pressure level

Measurement shall be taken with the microphone, positioned at a distance of 1 m from the vertical axis of the bowl, and at a height of 1,6 m above the floor on that side where the highest value of the A-weighted sound pressure level is observed

A.1.2 Sound power level determination

If it is necessary (see A.8) to determine the sound power level, EN ISO 3744:1995 shall be applied

A.2 Installation and mounting conditions

The test environment shall comply with clause 6 of EN ISO 11201:1995 It shall be qualified according to the annex A of EN ISO 3744:1995

NOTE For tests in open site, it is assumed that the environmental correction K2 is less than or equal to 0,5 dB and is

therefore negligible

The machine under test shall be placed on a reflecting (acoustically hard) test table as defined in annex B of

EN ISO 11201:1995 or a reflecting plane for machines on feet

A.3 Operating conditions

A.3.1 Food processors

The test shall be carried out at the maximum speed of the food processor with the bowl empty

A.3.2 Blenders

Same requirements as in A.3.1 but with the bowl being filled with water at 25 % of the nominal volume

A.4 Measurement

A-weighted sound pressure levels shall be measured at specified positions

The measuring instruments shall be in compliance with clause 5 and 10.2.1 of EN ISO 11201:1995

The measuring time at each microphone position shall be at least 15s