1、BRITISH STANDARD BS EN 28662-1:1993 ISO8662-1: 1988 Hand-held portable power tools Measurement of vibrations at the handle Part1: General The European Standard EN28662-1:1992 has the status of a British Standard UDC534.1:534.6:621.9-182.4:534.83BSEN 28662-1:1993 This British Standard, having been pr
2、epared under the directionof the General Mechanical Engineering Standards Policy Committee, waspublished under the authorityof the Standards Boardand comes into effect on 15January1993 BSI03-1999 The following BSI references relate to the work on this standard: Committee reference GME/21 Draft for c
3、omment86/76832 DC ISBN 0 580 21252 1 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches Normungsinstitut Belgium
4、Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland Nat
5、ional Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Cert
6、ificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBS EN 28662-1:1993 BSI 03-1999 i Contents Page Cooperating organizations Inside front cover Na
7、tional foreword ii Foreword 2 Introduction to the European Standard 2 0 Introduction 3 1 Scope and field of application 3 2 References 3 3 Quantities to be measured 3 4 Instrumentation 4 5 Measurement direction and location 5 6 Determination of working procedure 5 7 Report on measurements 5 National
8、 annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back coverBSEN 28662-1:1993 ii BSI 03-1999 National foreword This British Standard has been prepared under the direction of the General Mechanical Engineering Standards Policy Com
9、mittee and is the English language version of EN28662-1:1992 Hand-held portable power tools Measurement of vibrations at the handle Part1. General published by the European Committee for Standardization (CEN). It is identical with ISO8662-1:1986 published by the International Organization for Standa
10、rdization (ISO). EN28662-1:1992 was produced as a result of international discussion in which the UK took an active part. The United Kingdom participation in the preparation of the International Standard (ISO8662-1) was entrusted by the Machinery Components Standards Policy Committee (MCE/-) to Tech
11、nical Committee MCE/8. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages T
12、his document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on theinside fro
13、nt cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN28662-1 October1992 UDC534.1:534.6:621.9-182.4:534.83 Descriptors: Vibration, power-operated tools, portable electric machine tools, handles, vibration tests, measurements English version Hand-held portable power tools Measurement of vibra
14、tions at the handle Part1: General (ISO8662-1:1988) Machines moteur protatives Mesurage des vibrations au niveau des poignes Partie1:Gnralits (ISO8662-1:1988) Handgehaltene, tragbare motorbetriebene Werkzeuge Teil1: Allgemeines (ISO8662-1:1988) This European Standard was approved by CEN on1992-10-19
15、. 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
16、 application to the Central Secretariat 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 Central Secretariat
17、 has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for S
18、tandardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart36, B-1050 Brussels 1992 Copyright reserved to CEN members Ref. No. EN28662-1:1992EEN28662-1:1992 BSI 03-1999 2 Foreword Following consideration of the results of a Primary Questionnaire
19、among members, the CEN Technical Board decided in October1991 to submit the International Standard: ISO8662-1:1988, Hand-held portable power tools Measurement of vibrations at the handle Part1:General. to the Formal Vote. This European Standard shall be given the status of a national standard, eithe
20、r by publication of an identical text or by endorsement, at the latest by April1993, and conflicting national standards shall be withdrawn at the latest by April1993. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Be
21、lgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Introduction to the European Standard There are two primary reasons for measuring the vibration on hand held or hand guided machinery.
22、The first is to determine the vibration dose by combining the measured vibration accelerations with the time history over which the tool is used during a typical working day. The measured vibration values should be obtained in such a way as to represent in as realistic a way as possible the actual w
23、orking situation. They should be measured over a sufficient time period to allow a good average value to be measured representing the actual daily exposure. It may be necessary to use a number of tranducer locations in order to take account of different vibration levels over the grip surface or hand
24、le. The vibration dose can then be converted to an equivalent level which would be considered to be constant over a reference period (e.g.4hours). This equivalent vibration value can then be used to evaluate the risk of damage due to the vibration exposure using agreed damage risk criteria. The seco
25、nd reason would be to compare the vibrations from different tools or machinery or different models of the same tool. The machine safety directive89/392/EEC requires that measurements be made and values put into the instructions and sales literature if the values are greater than2,5ms 2and, if the va
26、lue is lower than2,5ms 2 , that fact shall be stated. The first measurements are called field measurements and the second are called type test measurements. Field measurements require accurate measurements coupled with the appropriate time history and the result is very dependent on the particular p
27、rocess or way in which the tool is being used. This means that field measurements cannot be used to type test tools. Type test measurements require accurate and reproducible measurements. It is essential that different laboratories obtain the same results within specified limits. This requires that
28、the process or way in which the tool or machinery is used during the meaurement is precisely defined. Normally this process will be typical of the way the tool or machine is used in practice. Unfortunately in some cases, in order to obtain sufficient accuracy, an artifical process, which is not typi
29、cal of the way the tool is used in the field, has to be used. However is it important that the process used in these measurements gives vibration levels which are typical of measurements made in the field. It is clear that type test measurements cannot be used to assess vibration obtaining at the wo
30、rkplace. ENV25349 defines the parameters and gives general guidance on how field measurements and assessment of risk may be made. In specific standards guidance will be given as to how to perform field tests for different types of machinery. EN28662-1 defines the general requirements that are needed
31、 for type test measurements and the tool specific parts of EN28662 define precise methodologies for the type testing of specific tools.EN28662-1:1992 BSI 03-1999 3 General 0 Introduction This International Standard specifies type test methods for the measurement of vibrations in the handles of hand-
32、held power-driven tools. It defines a laboratory measuring procedure which provides accurate and reproducible results as well as results which are as far as possible in agreement with results measured under real working conditions. These type tests serve to establish type values, enabling comparison
33、 of the same type or of different types of tools. This part of ISO8662 contains general requirements for the measurement of vibrations in all types of hand-held power tools. The other parts of ISO8662 specify type test procedures for the measurement of vibrations in handles of hand-held power-driven
34、 tools. The type test is designed to give information on the vibration performance of a given power tool, making it possible to compare various tools. As far as possible, the operating conditions of the tool will represent a typical work situation. The operating procedure is specified in sufficient
35、detail to ensure satisfactory reproducibility of measurements. NOTEA number of test methods have been specified, covering a range from a real work situation to a completely artificial situation, to achieve the desired reproducibility. The vibrations generated in a tool depend on the work situation i
36、n which it is used. The operators exposure to vibration depends on factors additional to those specified in the type test given, e.g.the operators experience, the condition of the tool and its accessories, the process and the duration of exposure. This International Standard does not give any guidel
37、ines or recommendations for assessing the risk of damage due to the vibration exposure. However, the magnitude of the vibrations measured is, as far as possible, a realistic measure of the vibration intensity to be expected in a normal working situation. Vibrations in a hand-held power tool in a wor
38、king situation comprise components generated in the machine itself and in the inserted tool, e.g.the grinding wheel or chisel. The workpiece and the process have an important influence on the vibration levels encountered. It is not the purpose of this International Standard to separate the influence
39、s of these various factors. At present, the deviation observed between measurements carried out in different laboratories is not as low as desired. However, development of the measurement technique and more precise specification of the operating conditions in conjunction with experience should lead
40、to a greater degree of reproducibility in the future. NOTEWhen further experience and more information have been gained, a revision to this International Standard may become justified. 1 Scope and field of application This part of ISO8662 describes the basic requirements for evaluating vibrations in
41、 the handles of hand-held power-driven tools. It is not intended for assessment of human exposure to vibrations. The measurement and assessment of human exposure to hand-transmitted vibration in the workplace is given in ISO5349. 2 References ISO1683, Acoustics Preferred reference quantities for aco
42、ustic levels. ISO5347, Methods for the calibration of vibration and shock pick-ups 1) . ISO5348, Mechanical vibration and shock Mechanical mounting of accelerometers. ISO5349, Mechanical vibration Guidelines for the measurement and the assessment of human exposure to hand-transmitted vibration. ISO5
43、805, Mechanical vibration and shock affecting man Vocabulary. ISO8041, Human response to vibration Measuring instrumentation 1) . IEC Publication225, Octave, half-octave and third-octave band filters intended for the analysis of sounds and vibrations. 3 Quantities to be measured 3.1 Physical quantit
44、y Vibrations are measured as the acceleration of the handles of the power tool under test and shall be expressed as the rootmean-square (r.m.s.) acceleration, a h , in metres per second squared. The magnitude of the vibration may also be expressed in terms of an acceleration level, , in decibels, de
45、termined according to the formula 1) At present at the stage of draft. L a h L a h 20 lg a h a 0 - =EN 28662-1:1992 4 BSI 03-1999 where a h is the r.m.s. acceleration, in metres per second squared; a 0 is the reference acceleration equal to 10 6m/s 2 , as specified in ISO1683. 3.2 Frequency analysis
46、 Measurement shall be made in octave bands with centre frequencies of8 to1 000Hz or in one-third octave bands with centre frequencies of6,3 to1250 Hz. NOTE 1A frequency analysis in octave bands is regarded to be necessary in order to judge the validity of the measurement of the weighted value (see3.
47、3 and4.3), e.g.high values in bands below the repetition frequency of the tool may indicate the presence of non-linear effects. NOTE 2Octave band values can be directly measured or calculated from one-third octave band values. 3.3 Weighted acceleration Weighted acceleration values, can be obtained e
48、ither by measurement using the weighting filter for hand-arm vibration measurements defined in ISO8041 or by calculation from one-third octave band data, using the weighting factors specified in ISO5349. NOTEThese two methods may produce different results owing to differences in the curves, the tole
49、rances, and the filter characteristics in the electronic filtering networks. 4 Instrumentation 4.1 Specification of transducer A transducer for measuring acceleration, such as a piezoelectric device, shall be used in conjunction with a suitable preamplifier. ISO8041 shall be consulted for the specification of the measuring equipment. The total mass of the vibration transducer and its mounting shall be small in relation to that of the handle; it shall preferably be less than50g and not more than5% of the mass of t
