Tiêu Chuẩn Iso 05349-2-2001 Amd1-2015.Pdf

© ISO 2015 Mechanical vibration — Measurement and evaluation of human exposure to hand transmitted vibration — Part 2 Practical guidance for measurement at the workplace AMENDMENT 1 Vibrations mécaniq[.]

Mechanical vibration — Measur ement

Vibrations méca ique s — Me sura e et é alu tion de l’e xp sition des

individus a x vibrations tra smises p r la main —

Partie 2: G uide pratique p ur le mesura e sur le lieu de tra ail

COPYRIGHT PROTECTED DOCUMENT

© ISO 201

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The committ ee r sp nsible for this document is ISO/TC 1 8, Mecha ic al vibratio , sh ck a d c onditio

mo itorin , Subcommitt ee SC4, Huma expos ur to mecha ic al v ibratio a d sh ck

ISO 5 49 consis s of the folowing p rt , u de the g ene al title Mecha ic al v ibratio — Meas ur ment

a d ev lu tion o h ma expos ur to h nd-tra s mit ed v ibratio :

— Part 1: G ene al r q ir ments

— Part 2 : Prac tic al g ida c e fr meas ur ment at the workplace

Mechanical vibration — Measurement and evaluation of

The folowing document , in w hole or in p rt, ar normatively r fe enc d in this document an ar

in ispensa le for it a pl cation F or dat ed r fe enc s, only the edition cit ed a pl es F or u dat ed

r fe enc s, the lat es edition of the r fe enc d document ( inclu ing any amen ment )a pl es

ISO 2 41,Mecha ic al vibratio , shock a d c ondition mo itorin — Voc ab lary

ISO 5 49-1, Mecha ic al v ibration — Meas ur ment a d ev lu tio o h ma ex pos ur to h nd-tra s mitted

v ibratio — Part 1: G ene al r q ir ments

ISO 5 0 ,Mecha ic al vibratio a d sh ck — Huma expos ur — Voc ab lar y

ISO 8041, Huma r s po s e to v ibration — Meas urin ins trumentatio

ISO 2 86 , For s tr y a d g rdenin machine y — Vibratio tes t c ode fr p rta le h nd-held machines w ith

inte n l c omb s tio en ine — Vibratio at the h ndles

ISO 2 9 7(al p rts),Ha d-held p rta le p we to l s — Tes t meth ds fr ev lu tio o v ibration emi s s ion

Pa e 7, 6.1.2.2

R eplac the subclause with the folowing

6.1.2.2V ibratio ma nitude

Han -held machines can prod c high vibration ma nitu es A pneumatic hamme , for ex mple, can

g ene at e a ma imum ac ele ation of 2 00 m/s

t o 5 00 m/s Howeve , much of this ene g is at

fr q encies wel out ide the fr q ency rang e used in thisp rt of ISO 5 49 The efor , the ac ele omet er

chosen for the measur ment has t o be a le t o o e at e at these ve y high vibration ma nitu es an

yet s i r sp n t o the much lowe ma nitu es in the fr q ency rang e from 6,3 Hz t o 1 2 0 Hz

(one-third-octa e b nd mid-fr q encies) F or the use of me hanical filt ers t o sup r s vibration at ve y high

fr q encies, se Annex C

Pa e 7, 6.1.3

R eplac the subclause with the folowing

6.1.3 Locatio of ac elerometer

V ibration measur ment in ac ordanc with ISO 5 49-1 should be made at or near the surfac of the

han (or han s) w he e the vibration ent ers the b dy Pr fe a ly, the ac ele omet er should be locat ed

at the mid le of the gripping zone (e.g halfwa along the width of the han w hen gripping a machine

han le), it is at this location that the mos r pr sentative ev luation of the vibration ent ering the han

is o tained Howeve , it is g ene aly not p s ible t o locat e transd c rs at this p in the transd c rs wi l

int erfe e with the normal grip used b the o e at or

Measur ment dir ctly u de the hand ar usual y only p s ible using spe ial mou ting ada t ors

( e An ex D ) Such ada t ors should fit un e the hand, or betwe n the fing ers F or mos practical

measur ment , the ac ele omet ers ar mou t ed on eithe side of the han or on the u de side of the

machine han le adjac nt t o the middle of the han W ith ada t ors that f it betwe n the f ing ers, the

transd c rs should be mou t ed as close as pos ible t o the surfac of the machine han le t o minimiz

ampl f ication ofrotational vibration comp nent They should not ha e any s ructural r sonanc s that

would afe t he measur d vibration

It is p s ible t o g et dife enc s in vibration measur ment ac os the width of the han , p rticularly for

han -held machines with side han les, such as angle grin e s, an espe ial y w he e these han les ar

flexibly mount ed In these cases, it is r commen ed that two ac ele omet ers p sitions be used, locat ed

one on each side of the han ; the a e ag e of the two vibration measur ment is then used t o es imat e

vibration ex osur

F or many han -held machines, spe if ic measur ment locations an ax es ha e be n def ined for the

measur ment of vibration emis ion b ISO 2 8 7, ISO 2 9 7, an othe Int ernational Stan ards for

de laration of vibration emis ion;these measur ment locations ar summariz d in An ex A as ex mples

of measur ment locations The measur ment locations def ined in vibration emis ion s an ards ar

designed for a p rticular ty e of measur ment an ar not ne es ariy suita le for the ev luation of

vibration ex osur Howeve , in some cir ums anc s, it ma be a pro riat e t o ensur that workplac

measur ment of vibration ar made using locations an ax es compatible with those used for emis ion

measur ment

NOTE The ISO 2 9 7 series of stan ards def ines the prefer ed me surement location as b ing as close as

pos ible to the han b tween the th mb an the in e f ing r, where an operat or normal y holds the machine

While this me surement position could b suita le for emis ion testing, it is not in aria ly suita le for work lace

e posure as es ment

Pa e 8,6.1.4.1

R eplac the subcla use with the folowing

6.1.4.1 General

The ac ele omet ers should be rigidly at ached t o the vibrating surfac An ex D gives detais of some

mounting methods A method shal be chosen w hich gives an adeq at e couplng t o the vibrating

surfac , does not int erfe e with the o e ation of the machine, an does not it elf afe t the vibration

charact eris ics of the vibrating surfac The mou ting method chosen is depen ent on the p rticular

measur ment ituation; each method has it own adv ntag es an disadv ntag es

The mou ting sy st em should ha e a flat fr q ency r sponse ac os the rang e of fr q encies being

measur d, i.e it should not att en at e or ampl fy an should not ha e any r sonanc s in this fr q ency

rang e The mounting sy st em should be se ur ly at ached t o thevibrating surfac , an should be car fuly

che ked befor an aft er measur ment

The mou ting of ac ele omet ers on a machine or han -held workpie e is ne es ari y intrusive an can

ha e some efe t on how the o e at or works The mou ting of the transd c rs should be ar ang ed so

that he o e at or can work as normal y as p s ible It is imp rtant, prior t o measur ment , t o o se ve

how a machine or han -held workpie e is held, t o identify the bes location an orientation of the

ac ele omet ers The location (or locations) an orientation of the transd c rs should be r p rt ed

It is ve y important t o a oid int erfe ing with the machine controls or with the safe o e ation of the

machine It isoft en the case on machines, that he bes measur ment location is w he e the on-of swit ch

is positioned C r shal be taken t o ensur that the machine controls ar not (an wi l not be ome)

impeded b transd c rs, mou tings or ca les

Pa e 8,6.1.4.2

R eplac the subclause with the folowing

6.1.4.2A ttaching to surfaces with resi ient coatings

When a machine han le has a sof out er co ting, the vibration transmis ion pro e ties of the co ting ar

dependent on the for e with w hich the mou ting sy st em is at ached In such cases, car shal be taken

t o ensur that the r si ent mat erial does not afe t the measur ment of vibration If the co ting is not

thought t o be pro iding r d ction in vibration ex osur , eithe

— r mo e the r si ent mat erial from the ar a beneath the transd c rs, or

— f irmly at ach the transd c rs using a hose clamp or simi ar devic that fuly compr s es the

r si ient mate ial

In mos cases, this a pro ch is adeq at e Howeve , it does not ac ou t for the vibration transmis ion

pro e ties of the r si ent co ting

Gene aly, r si ient mate ials on machine han les ar not inten ed to pro ide vibration r d ction

but to pro ide a g od grip surfac R esi ent co tings do not usualy afe t the fr q ency-weighted

vibration ma nitu e

If the r si ent co ting pro ides somer d ction in vibration ex osur , for ex mple, if it is a thick la e of

r si ent mat erial, then at ach the transd c r t o an ada t or ( e D.2.4 ) that isheld a ains the vibrating

surfac b the normal han grip of the o e at or ( he ada t or can be held in position using adhesive ta e

wra ped lghtly arou d the machine han le an ada t or) This ty e of measur ment is diff icult, but it

could give a bett er in ication of the actual vibration ex osur

NOTE It is pos ible for po rly selected resilient materials to amplify the vibration at certain freq encies

Pa e 12, 6.3.2

Delet e “ se also DIN45 7 -3)”

Pa e 16, An ex A

R eplac An ex A with the folowing

Annex A

( informative)

Examples of me surement locatio s

A.1 Introd ctio

It is not alway s practical t o make measur ment at the surfac of the han ()w he e the vibration ent ers

the b dy in the middle of the grip ing zones as desc ibed in 6.1.3; for ex mple, on machines with a

closed or o en b w grip or a pist ol grip, the location of the trigg er can make measur ment halfwa

along the han le imp s ible In practic , the measur ment location usualy has t o be t o one side of the

han The location of machine controls an han guards can also afe t w he e it is p s ible t o at ach

ac ele omet ers Figur A.1 show s ex mples of measur ment locations for some common machines,

controls, and work tasks

A.2 Me surement locatio s used in vibratio ty e test standards

Ta le A.1 ls s, as ex mples, the measur ment locations spe if ied in ISO 2 8 7 an in the ISO 2 9 7

se ies These Int ernational Stan ards spe ify la orat ory methods for measuring the vibration at the

han les of dife ent han -held machines for the purp se of det ermining vibration emis ion v lues

ISO 2 9 7 se ies r q ir s that measur ment be made at the grip ing zones, w he e the o e at or

normaly holds the machine an a ples the fe d for e These Int ernational Stan ards define a pr sc ibed

transd c r location for b th han s, t o be as close as p s ible t o the han betwe n the th mb and in ex

fing er A se on ary location is also defined, as being on the side of, an as close as p s ible to, the in e en

of the han le w he e the pr sc ibed location is fou d The pr sc ibed an se ondary transd c r p sitions

ar identified as p sitions “1” an “ 2” in Ta le A.1 The se on ary p sition is used w hen the pr sc ibed

location is not ac es ible or w hen use of that location would pr vent cor e t o e ation of the machine

The locations shown in Ta le A.1 ar suita le for emis ion t es ing, but might not be a pro riat e for

the measur ment of workplac ex osur In ad ition, the orientation of the ax es X, Y, Z, shown in the

pictur s also can ot mat ch the b sic ntric co rdinat e sy st em discus ed in Part 1 of this Int ernational

Stan ard The o je tives of an ex osur measur ment ar ve y dife ent t o those of a ty e t es F or

ev luation of vibration ex osur , the location of the ac ele omet ers shal be b sed on w he e the han

actualy holds the machine, rathe than w he e the machine is held d ring a ty e t es The principal

r q ir ment of the vibration ty e t es s an ards is that measur ment ar made in the main grip ing

zone w he e the o e at or normaly holds the machine an a plesthe fe d for e

2 ang le g rin er

3 pedestal g rin ing

4 chip ing hammer

5 han -g uided machine

6 ste ring whe l

me sur ement location

Figure A.1 — Examples of practical me surement locatio s for some commo machines,

co trols and wor k tasks

T able A.1 — Examples of ac elerometer locatio s on machines used in ISO 2 86 7 and ISO 28927 for vibration ty e testing

Brush-cuter or gras -t immer

with bicycle-ty e han les

Brush-cut er or gras -t immer

with lo p-ty e han le

When a chainsaw is used

on it side, the me s

ure-ment position on the top

of the f ont han le shown

here is not uitable

Work la e me surement

should be made as close

as pos ible to the c nt e

of the grip in z ne at he

time of use of the ma hine

When the saw is used on

it side, the han position

is moved arou d to the

side of f ont han le The

t ansd c r position mus

also be moved to folow

this han movement

Hed e t immer

Hed e t immer with lateral re r

an f ont han les

Pole-mou ted powered pru er Lon -re ch hed e t immer

Han -held blower/va u m

with d al han les

Han -held blower with sin le

han le Ba k a k blower/va u m

whose motor serves as main han le

For work la e me

sure-ment ,

use of the prescribed

lo ation on the side han le

( u por han le) is lk ely