SIST EN 60745-1:2006
(Main)Hand-held motor-operated electric tools - Safety -- Part 1: General requirements
Hand-held motor-operated electric tools - Safety -- Part 1: General requirements
This part of IEC 60745 deals with the safety of hand-held motor-operated or magnetically driven electric tools, the rated voltage of the tools being not more than 250 V for single-phase a.c. or d.c. tools, and 440 V for three-phase a.c. tools. So far as is practicable, this standard deals with the common hazards presented by hand-held tools which are encountered by all persons in the normal use and reasonably foreseeable misuse of the tools. Tools with an electric heating element are within the scope of this standard. They should also comply with relevant parts of IEC 60335. Requirements for motors not isolated from the supply, and having basic insulation not designed for the rated voltage of the tools, are given in Annex B. Requirements for rechargeable batterypowered motor-operated or magnetically driven tools and the battery packs for such tools are given in Annex K. Those for such tools that are also operated and/or charged directly from the mains or a non-isolated source are given in Annex L. Hand-held electric tools, hereinafter referred to as tools, which can be mounted on a support or working stand for use as fixed tools without any alteration of the tool itself, are within the scope of this standard. Requirements for such supports or working stands are given in Annex M. This standard does not apply to: - hand-held tools intended to be used in the presence of explosive atmosphere (dust, vapour or gas); - hand-held tools used for preparing and processing food; - hand-held tools for medical purposes (IEC 60601); - heating tools which are covered by IEC 60335-2-45. For hand-held tools intended to be used in vehicles or on board ships or aircraft, additional requirements may be necessary. For hand-held tools intended to be used in tropical countries, special requirements may be necessary.
Handgeführte motorbetriebene Elektrowerkzeuge - Sicherheit -- Teil 1: Allgemeine Anforderungen
Outils électroportatifs à moteur - Sécurité -- Partie 1: Règles générales
S'applique aux outils portatifs à moteur électrique ou à entraînement magnétique, la tension assignée des outils n'étant pas supérieure à 250 V pour les outils à courant monophasé alternatif ou continu et à 440 V pour les outils à courant alternatif triphasé. La présente norme traite des risques ordinaires présentés par les outils portatifs, encourus par tous les individus dans l'utilisation normale et dans l'utilisation impropre prévisible de ces outils.
Električna ročna orodja - Varnost - 1. del: Splošne zahteve (IEC 60745-1:2006)
General Information
Relations
Standards Content (Sample)
SLOVENSKI SIST EN 60745-1:2006
STANDARD
november 2006
Električna ročna orodja – Varnost - 1. del: Splošne zahteve (IEC 60745-1:2006,
spremenjen)
Hand-held motor-operated electric tools - Safety - Part 1: General requirements
(IEC 60745-1:2006, modified)
ICS 25.140.20 Referenčna številka
SIST EN 60745-1:2006(en)
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
EN 60745-1
NORME EUROPÉENNE
August 2006
EUROPÄISCHE NORM
ICS 25.140.20 Supersedes EN 60745-1:2003 + A1:2003
English version
Hand-held motor-operated electric tools -
Safety
Part 1: General requirements
(IEC 60745-1:2006, modified)
Outils électroportatifs à moteur - Handgeführte motorbetriebene
Sécurité Elektrowerkzeuge -
Partie 1: Règles générales Sicherheit
(CEI 60745-1:2006, modifiée) Teil 1: Allgemeine Anforderungen
(IEC 60745-1:2006, modifiziert)
This European Standard was approved by CENELEC on 2006-06-01. 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, 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 - 1050 Brussels
© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60745-1:2006 E
---------------------- Page: 2 ----------------------
EN 60745-1:2006 - 2 -
Foreword
The text of document 61F/632/FDIS, future edition 4 of IEC 60745-1, prepared by SC 61F, Safety
of hand-held motor-operated electric tools, of IEC TC 61, Safety of household and similar
electrical appliances, was submitted to the IEC-CENELEC parallel vote.
A draft amendment, prepared by the Technical Committee CENELEC TC 61F, Safety of
hand-held and transportable motor-operated electric tools, was submitted to the formal vote.
The combined texts were approved by CENELEC as EN 60745-1 on 2006-06-01.
This European Standard supersedes EN 60745-1:2003 + A1:2003.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2007-06-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2009-06-01
This European Standard has been prepared under a mandate given to CEN and CENELEC by the
European Commission and the European Free Trade Association and covers essential health and
safety requirements of the Machinery Directive.
Compliance with the clauses of Part 1 together with a Part 2 provides one means of conforming to
the essential health and safety requirements of the Directive concerned.
A relevant Part 2 is one in which the type of the tool or an accessory which is to be used with the
tool is within the scope of that Part 2.
When a relevant Part 2 does not exist, Part 1 can help to establish the requirements for the tool,
but will not by itself provide a means of conforming to the relevant essential health and safety
requirements of the Machinery Directive.
Other standards referred to in this European Standard are also listed in Clause 2, which gives the
valid edition of those documents at the time of issue of this EN.
CEN Technical Committees have produced a range of standards dealing with a similar range of
non-electrically powered tools. Where necessary normative references are made to these
standards in the relevant Part 2.
This European Standard follows the overall requirements of EN ISO 12100-1 and
EN ISO 12100-2.
This European Standard is divided into two parts:
Part 1: General requirements which are common to most hand-held electric motor operated tools
(for the purpose of this standard referred to simply as tools) which could come within the
scope of this standard;
Part 2: Requirements for particular types of tools which either supplement or modify the
requirements given in Part 1 to account for the particular hazards and characteristics of
these specific tools.
---------------------- Page: 3 ----------------------
- 3 - EN 60745-1:2006
Subclauses, tables and figures which are additional to those in IEC 60745-1 are prefixed “Z”.
NOTE In this standard the following print types are used:
- requirements proper; in roman type
- test specifications: in italic type;
- explanatory matter: in smaller roman type.
---------------------- Page: 4 ----------------------
EN 60745-1:2006 - 4 -
Endorsement notice
The text of the International Standard IEC 60745-1:2006 was approved by CENELEC as a European
Standard with agreed common modifications as given below.
COMMON MODIFICATIONS
2 Normative references
Add the following normative references:
CR 1030-1:1995, Hand-arm vibration – Guidelines for vibration hazards reduction – Part 1:
Engineering methods by design of machinery
EN 12096:1997, Mechanical vibration - Declaration and verification of vibration emission values
EN 27574-4:1988, Acoustics - Statistical methods for determining and verifying stated noise
emission values of machinery and equipment - Part 4: Methods for stated values for batches of
machines (ISO 7574-4:1985)
EN ISO 8041:2005, Human response to vibration - Measuring instrumentation (ISO 8041:2005)
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 4871:1996, Acoustics - Declaration and verification of noise emission values of machinery
and equipment (ISO 4871:1996)
EN ISO 5349 (all parts), Mechanical vibration -- Measurement and evaluation of human exposure
to hand-transmitted vibration (ISO 5349 all parts)
EN ISO 11203:1995, Acoustics - Noise emitted by machinery and equipment - Determination of
emission sound pressure levels at a work station and at other specified positions from the sound
power level (ISO 11203:1995)
EN ISO 11688-1:1998, Acoustics - Recommended practice for the design of low noise machinery
and equipment - Part 1: Planning (ISO/IR 11688-1:1995)
EN ISO 11690-3:1998, Acoustics - Recommended practice for the design of low-noise workplaces
containing machinery - Part 3: Sound propagation and noise prediction in workrooms
(ISO/TR 11690-3:1997)
EN ISO 20643:2005, Mechanical vibration - Hand-held and hand-guided machinery - Principles for
evaluation of vibration emission (ISO 20643:2005)
ISO 5347 (all parts), Methods for the calibration of vibration and shock pick-ups
ISO 16063-1:1998, Methods for the calibration of vibration and shock transducers - Part 1: Basic
concepts
---------------------- Page: 5 ----------------------
- 5 - EN 60745-1:2006
Replace the existing Clause 6 - Void by the following:
6 Environmental requirements
6.1 Noise
6.1.1 Noise reduction
Noise reduction at tools is an integral part of the design process and shall be achieved by
particularly applying measures at source to control noise, see for example EN ISO 11688-1. The
success of the applied noise reduction measures is assessed on the basis of the actual noise
emission values in relation to other machines of the same type with comparable non acoustical
technical data.
The major sound sources of tools are: motor, fan, gear.
6.1.2 Noise test code (grade 2)
6.1.2.1 General
Noise emission values like the emission sound pressure level L and the sound power level
pA
L to be quoted in the user instructions as required by 8.12.2 Za)1) shall be measured according
WA
to the test procedure described in 6.1.2.1 to 6.1.2.6.
The overall noise can be divided into the pure machine noise and the noise of processing the
workpiece. Both are influenced by the method of operation, however for percussive tools the
noise emission of the workpiece can be dominant. The load conditions for particular tools are
therefore specified in the relevant Part 2.
Noise emission values obtained under these measurement conditions will not necessarily
correspond to the noise levels produced under the operational conditions of practical use.
NOTE It is not possible to simulate all conditions of practical use. A statement of process noise could
therefore
- be misleading and cause faulty assessment of the risk in individual cases,
- discourage the development of more silent machines,
- lead to low repeatability of measurements and thus cause problems when verifying declared noise values,
- make the comparison of the noise emission from different tools difficult.
6.1.2.2 Sound power level determination
The sound power level shall be measured according to EN ISO 3744, where the acoustic
environment, instrumentation, quantities to be measured, quantities to be determined, and the
measurement procedure are specified.
The sound power level shall be given as A-weighted sound power level in dB reference 1 pW. The
A-weighted sound pressure levels, from which the sound power is to be determined, shall be
measured directly, and not calculated from frequency band data. Measurements shall be made in
an essentially free field over a reflecting plane.
For all hand-held electric power tools, the sound power level shall be determined by using a
hemispherical / cylindrical measurement surface according to Figure Z2.
The hemispherical / cylindrical measurement surface is described by a hemisphere standing on a
cylindrical pedestal (see Figure Z2). Five microphone positions shall be located 1 m from the
geometric centre of the power tool. Four positions shall be spaced at regular intervals on a plane
defined as passing through the geometric centre of the power tool and parallel to the reflecting
plane; the fifth position shall be located at a distance of 1 m above geometric centre of the power
tool.
---------------------- Page: 6 ----------------------
EN 60745-1:2006 - 6 -
The A-weighted sound power level, L , shall be calculated, in accordance with Subclause 8.6 of
WA
EN ISO 3744 as follows :
S
L = L +10lg( ) , in dB (Z1)
WA pfA
S
0
with L determined from
pfA
5
1 ′
0,1L
pA,i
L = 10lg 10 − K − K
pfA 1A 2A
∑
5
i=1
where
is the A-weighted surface sound pressure level according to EN ISO 3744
L
pfA
th
L′
pA,i A-weighted sound pressure level measured at the i microphone position, in dB
K
1A Background noise correction, A-weighted
K
2A Environmental correction, A-weighted
2
S Area of the measurement surface, in m
2
S = 1 m
0
For the hemispherical / cylindrical measurement surface shown in Figure Z2, the area S of the
measurement surface is calculated as follows:
2
2
S = 2π(R + Rd) , in m. (Z2)
where
d = 1 m is the height of the distance of the geometrical centre of the power tool above the
reflecting plane
and
R = 1 m is the radius of the hemisphere and of the cylinder which comprise the measurement
surface.
Therefore,
2
S = 4π m ,
so, from equation (Z1)
L = L +11, in dB. (Z3)
WA pfA
6.1.2.3 Emission sound pressure level determination
The A-weighted emission sound pressure level at the work station, L , shall be determined in
pA
accordance with EN ISO 11203 as follows:
L = L −Q , in dB (Z4)
pA WA
where
Q = 11, in dB
---------------------- Page: 7 ----------------------
- 7 - EN 60745-1:2006
NOTE 1 This value of Q has been determined, during experimental investigations, to be applicable to hand-held power
tools. The resulting A-weighted emission sound pressure level at the workstation is equivalent to the value of the surface
sound pressure level at a distance of 1 m from the power tool. This distance has been chosen to give satisfactory
reproducibility of results, and to permit comparison of the acoustic performance of different hand-held power tools which
do not, in general, have uniquely defined work stations. Under free field conditions, where it may be required to estimate
the emission sound pressure level, L , at a distance r in m from the geometric centre of the power tool, this may be
pA1 1
done by applying the formula :
1
L = L + 20 lg ( ), in dB
pA1 pA
r
1
NOTE 2 At any given position in relation to a particular machine, and for given mounting and operating conditions, the
emission sound pressure levels determined by the method of this European Standard will in general be lower than the
directly measured sound pressure levels for the same machine in the typical workroom where it is used. This is due to
the influence of sound reflecting surfaces in the workroom compared to the free field conditions of the test specified here.
A method of calculating the sound pressure levels in the vicinity of a machine operating alone in a workroom is given in
EN ISO 11690-3. Commonly observed differences are 1 dB to 5 dB, but in extreme cases the difference may be even
greater.
If required, the C-weighted peak emission sound pressure level L shall be measured at each
pCpeak
of the five measurement positions specified in 6.1.2.2. The C-weighted peak emission sound
pressure level at the work station is the highest C-weighted peak sound pressure level measured
at any of the five microphone positions; no corrections are permitted.
6.1.2.4 Installation and mounting conditions of the power tools during noise tests
The installation and mounting conditions shall be the same for the determination of both sound
power level and emission sound pressure level at the work station.
The power tool under test shall be new and equipped with accessories which affect the acoustic
properties, as recommended by the manufacturer. Prior to commencing testing, the power tool
(including any required ancillary equipment) shall be set up in a stable condition in accordance
with the manufacturer’s instructions for safe use.
The tool is held by the operator or suspended in such a way as to correspond to normal use, as
specified in the relevant Part 2.
o
If the power tool is used horizontally, it shall be positioned so that its axis is at 45 between the
microphone positions 1 - 4 and 2 - 3; its geometrical centre shall be 1 m above the ground
(reflecting plane). If these requirements are impracticable or the tool is not used horizontally, the
adopted positions shall be recorded and described in the test report.
The operator shall not be positioned directly between any microphone position and the power tool.
6.1.2.5 Operating conditions
The operating conditions shall be identical for the determination of both sound power level and
emission sound pressure level at the work station.
Measurements shall be carried out on a new tool.
Tools are tested under the two operating conditions “no load” or “load” as appropriate for the type
of tool and specified in the relevant Part 2. Before starting the test, the tool shall be operated
under these conditions for a period of at least 1 min.
A measurement under “load” is to be carried out during processing of a workpiece or under
external mechanical load equivalent to normal operation.
Where tests are required to be carried out on a bench it shall be in accordance with the test bench
shown in Figure Z1.
---------------------- Page: 8 ----------------------
EN 60745-1:2006 - 8 -
Care shall be taken that the location of the work piece on its support does not adversely affect the
result of the test. If necessary, or when specified in the Part 2, the work piece shall be supported
on a resilient material 20 mm thick compressed to 10 mm under the weight of the work piece.
Three consecutive tests for no-load or five for load shall be carried out and the result of the test
L shall be the arithmetic mean, rounded to the nearest decibel, of the three or five tests.
WA
During measurements, the power tool shall operate under stable conditions. Once the noise
emission is steady, the measurement time interval shall be at least 15 s, unless the operating
conditions specified in the relevant Part 2 do not require another time interval. If measurements
are to be made in octave or one-third octave frequency bands, the minimum period of observation
shall be 30 s for the frequency bands centred on or below 160 Hz, and 15 s for the frequency
bands centred on or above 200 Hz.
6.1.2.6 Measurement uncertainties
A standard deviation of reproducibility of less than 1,5 dB is expected for the A-weighted sound
power level determined according to EN ISO 3744 and the A-weighted emission sound pressure
level determined according to EN ISO 11203.
6.1.2.7 Information to be recorded
The information to be recorded covers all of the technical requirements of this noise test code.
Any deviations from this noise test code or from the basic standards upon which it is based are to
be recorded together with the technical justification for such deviations.
6.1.2.8 Information to be reported
The information to be included in the test report is at least that which is required to prepare a
noise declaration or to verify the declared values. Thus as a minimum the following information
shall be included:
− reference to this noise test code and to the basic standards used;
− description of the power tool;
− description of the mounting and operating conditions;
− the noise emission values obtained.
It shall be confirmed that all requirements of the noise test code have been fulfilled, or, if this is
not the case, any unfulfilled requirements shall be identified. Deviations from the requirements
shall be stated and technical justification for the deviations shall be given.
6.1.2.9 Declaration and verification of noise emission values
The declaration of the noise emission values shall be a dual number according to EN ISO 4871. It
shall declare the noise emission value L (L , L and L ) and separately the respective
pA pCpeak WA
uncertainty K (K , K and K ).
pA pCpeak WA
For a standard deviation of reproducibility of 1,5 dB and for a typical standard deviation of
production, the values for the uncertainty, K , K and K respectively, are expected to be
pA pCpeak WA
3 dB.
The noise declaration shall state that the noise emission values have been obtained according to
this noise test code. If this statement is not true, the noise declaration shall indicate clearly what
the deviations from this standard, and from the basic standards, are.
NOTE If the measured value is the average based on a sample of three power tools that has been properly sampled,
then K normally is 3 dB. Further guidance on sampling and uncertainty terms is given in EN 27574-4 and EN ISO 4871.
Additional noise emission quantities may also be given in the declaration.
---------------------- Page: 9 ----------------------
- 9 - EN 60745-1:2006
If undertaken, the verification shall be performed for a batch of power tools, in accordance with
Subclause 6.3 of EN ISO 4871. The verification shall be conducted by using the same mounting,
installation and operating conditions as those used for the initial determination of noise emission
values.
6.2 Vibration
6.2.1 Vibration reduction
The vibration at the handles shall be kept as low as possible without unduly affecting the
performance and the ergonomics (weight, handling, etc.) of the tool.
In particular vibration shall be reduced by the application of engineering measures as given in
CR 1030-1. The success of the applied vibration measures is assessed by comparing the
vibration levels for the tool with those for other tools of the same type and with a comparable
specification and performance.
6.2.2 Vibration measurement - General
Details for particular types of tools are given in the relevant Part 2. The test code gives all the
information necessary to carry out efficiently the determination, declaration and verification of the
vibration emission characteristics. It shall allow comparison of test results for different tools.
EN 12096 gives guidance on how to declare the vibration emission values of machinery, and
specifies requirements for verification of declared values.
The vibration levels for hand-arm vibration a to be quoted in the user instructions, as required by
h
8.12.2 Za)3) shall be measured in accordance with the following test procedure.
The uncertainty K is provided as an indication of the measured deviation from the mean during
the test.
The measurement and assessment of human exposure to hand-transmitted vibration in the
workplace is given in EN ISO 5349-1 and EN ISO 5349-2.
NOTE Annex ZB provides information on possible sources of errors of measurement.
6.2.3 Symbols
In this subclause, the following symbols are used.
a (t) instantaneous single-axis acceleration value of the frequency-weighted hand-
hw
transmitted vibration at time t, in m/s²
a root-mean-square (r.m.s.) single-axis acceleration value of the frequency-
hw
weighted hand-transmitted vibration, in m/s²
a , a , a values of a in m/s², for the axes denoted X, Y and Z respectively
hwx hwy hwz hw
a vibration total value of frequency-weighted r.m.s. acceleration, in m/s²; it is the
hv
root-sum-of-squares of the a values for the three measured axes of vibration
hw
a arithmetic mean total vibration value of the measurement results of all runs and
h
operators in m/s², this is the result of the test
σ standard deviation of reproducibility
R
2
K uncertainty of a in m/s
h
---------------------- Page: 10 ----------------------
EN 60745-1:2006 - 10 -
C coefficient of variation of a test series, defined as the ratio of the standard
V
deviation of a series of measurement values and the mean value of the series:
s
N−1
C =
V
a
hv
where
N
1
2
s = (a − a ) is the standard deviation
N−1 hvi hv
∑
N −1
i = 1
a is the mean vibration total value of the series of 5 measurements in m/s²
hv
a is the i-th vibration total value of one series of measurements in m/s²
hvi
N is the number of measured values within one series of measurements
(here N = 5)
6.2.4 Characterisation of vibration
6.2.4.1 Direction of measurement
Vibration transmitted to the hand is related to the three orthogonal directions X, Y and Z as shown
in Figure Z3. For particular types of tools, these directions may be defined in the relevant Part 2.
6.2.4.2 Location of measurement
Measurements shall be made in three directions at each hand position. All measurements shall be
conducted simultaneously.
Measurements shall be carried out as close as possible to the hand between the thumb and the
index finger, where an operator normally holds the machine.
If gripping areas are covered by soft surface material, precaution shall be taken to avoid
resonance effects of the transducer mounting. If soft surface material is provided in the gripping
area it shall be removed or strongly compressed by a transducer mounting clamp or suitable
adaptor.
In the case of vibration isolated handles the location of measurement can influence the vibration
significantly. If the transducer cannot be placed half way along the length of the handle, the points
of measurement shall be left and right to the hand to determine the relevant vibration over the
gripping area (see Figure Z3a). In this case, the test result for this handle is the average of the
results of these two measurement positions.
NOTE 1 E.g. at vibration-isolated handles of grinding machines, the vibration changes significantly over the length of
the gripping zone.
NOTE 2 The above paragraph is under review.
The measurement positions for particular types of tools are specified in the relevant Part 2.
When machines are operated with more than one grip or grasping surface, the vibration at the
hand positions where an operator normally holds the tool during normal operation shall be
measured and recorded. If it can be shown that the vibration magnitude at one grip is always
dominant, the vibration test code may specify that measurements are made only at that gripping
zone.
---------------------- Page: 11 ----------------------
- 11 - EN 60745-1:2006
6.2.4.3 Magnitude of vibration
The quantity used to describe the magnitude of vibration shall be the frequency-weighted
acceleration a in m/s².
hw
Frequency weighting in accordance with EN ISO 5349-1 shall be used.
The r.m.s. value a in accordance with this European Standard is defined as the r.m.s. value of
hw
the frequency-weighted acceleration signal a (t):
hw
1/ 2
T
1
2
a = a (t) dt (Z5)
hw hw
∫
T
0
An integrating device equipped with linear integration facilities shall be used in order to obtain
r.m.s. values of signals substantially varying with time.
The measurement time shall be as long as reasonably possible and normally not less than 8 s for
hand-transmitted vibration measurements.
If the measurement time of 8 s for individual machines is not possible, e.g. because of short
duration of operation (defined in 6.2.6.3), this shall be specified in the relevant Part 2 of this
standard.
6.2.4.4 Combination of vibration directions
The vibration total value a is determined from
hv
1/ 2
2 2 2
a =[]a + a + a (Z6)
hv hwx hwy hwz
where
a , a , a are the r.m.s. values of the frequency-weighted acceleration in the directions X,
hwx hwy hwz
Y and Z, respectively.
6.2.5 Instrumentation requirements
6.2.5.1 General
The vibration measurement equipment shall be in accordance with EN ISO 8041.
Instrumentation for measuring other parameters (e.g. for controlling the working conditions),
whose characteristics are not covered by EN ISO 8401, shall be specified in the relevant Part 2.
6.2.5.2 Transducers
6.2.5.2.1 Specification of transducers
The vibration values as specified in 6.2.4.3 shall be measured using transducers and other
appropriate measurement equipment conforming to EN ISO 8041.
The total mass of the vibration transducer and its mounting shall not be sufficient to influence the
measurement result and shall not be more than 5 g for each direction of measurement.
NOTE Lightweight plastic handles are an example, where heavy transducers may not be suitable. See EN ISO 5349-2
for further information.
Factors such as the transverse sensitivity (less than 10 %), the ambient temperature range, the
typical temperature transient sensitivity and the maximum shock acceleration shall be considered
in the selection of transducers.
---------------------- Page: 12 ----------------------
EN 60745-1:2006 - 12 -
6.2.5.2.2 Fastening of transducers
Guidance on mounting of transducers is given in EN ISO 5349-2. The transducer and the
mechanical filter, if used, shall be mounted rigidly and on the vibrating surface.
Mechanical filters or other appropriate means may be needed to minimize measurement errors
likely to occur when measuring vibration containing impulsive elements, such as occur in
percussive tools. For more details, see EN ISO 5349-2.
NOTE High acceleration in the high-frequency components of the vibration can cause the transducer to generate false
signals (e.g. dc shift) in the frequency range of interest because of excitation of the resonance of the transducer itself.
6.2.5.3 Calibration of the measurement chain
The whole measurement system shall be checked both before and after a sequence of
measurements using a calibrator which produces a known acceleration at a known frequency.
The transducers shall be calibrated in accordance with ISO 5347 and ISO 16063-1. The whole
measurement system shall be checked according to the requirements in EN ISO 8041.
6.2.6 Testing and operating conditions of the machinery
6.2.6.1 General
Measurements shall be carried out on a new tool that is only used for the noise and vibration tests
required by this standard.
When the test procedure is not provided in a relevant Part 2 or there is no relevant Part 2, the
operating conditions and working procedure shall be specified in sufficient detail as to achieve
appropriate reproducibility. Test procedures based on a typical real working situation are
preferred. The vibration test may simulate a single phase of a task or a working cycle, consisting
of a set of operations where the operator is being exposed to vibration.
If for reasons of better reproducibility a simulated work condition is defined, the vibration source
shall produce approximately the same magnitude of vibration as that in a typical working situation.
If necessary to provide realistic emission levels, tests shall be carried out under more than one
operating condition or set of operating conditions as defined in the relevant Part 2.
If the machinery is equipped with means or devices to reduce the vibration emission in
comparable operating conditions, these shall be used, in accordance with the user instructions,
during vibration testing. If this requires a deviation from the type test method, t
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.