prEN ISO 22867

Forestry and gardening machinery - Vibration test code for portable hand-held machines with internal combustion engine - Vibration at the handles (ISO/DIS 22867:2020)

Forst- und Gartenmaschinen - Schwingungsmessnorm für handgehaltene Maschinen mit Verbrennungsmotor - Schwingungen an den Handgriffen (ISO/DIS 22867:2020)

Dieses Dokument legt ein Schwingungsmessverfahren zur effizienten Ermittlung der Schwingungen an den Handgriffen von handgehaltenen Forst- und Gartenaschinen mit Verbrennungsmotor wie den folgenden unter einheitlichen Bedingungen fest: Kettensägen, Freischneider (Gestrüppschneider), Grastrimmer (Rasen-trimmer), Kantenschneider, Hochentaster, Heckenscheren und Laubbläser.
Obwohl die Messwerte in einem Ersatz-Arbeitsverfahren ermittelt werden, sind sie ein Maß für die Werte, die unter praktischen Arbeitsbedingungen zu finden sind.
Die in diesem Dokument beschriebenen Schwingungsmessnormen ermöglichen es dem Hersteller, schwin-gungsreduzierte Konstruktionen zu verifizieren.
ACHTUNG - Einige der in diesem Dokument festgelegten Messabläufe enthalten Vorgehensweisen, die zu einer Gefährdung führen können. Alle Personen, die eine Messung nach diesem Dokument durchführen, müssen in der auszuführenden Arbeit ausreichend geübt sein. Nationale Vorschriften und Anforderungen an den Gesundheitsschutz und die Sicherheit müssen eingehalten werden.

Machines forestières et machines de jardin - Code d'essai des vibrations pour machines portatives tenues à la main à moteur à combustion interne - Vibrations au niveau des poignées (ISO/DIS 22867:2020)

Gozdarski in vrtnarski stroji - Standard za meritev tresenja ročno vodenih strojev, gnanih z motorjem z notranjim zgorevanjem - Tresenje na ročajih (ISO/DIS 22867:2020)

General Information

• Status: Not Published
• ICS: 13.160 - Vibration and shock with respect to human beings
• ICS: 65.060.80 - Forestry equipment
• Technical Committee: CEN/TC 144 - Tractors and machinery for agriculture and forestry
• Drafting Committee: CEN/TC 144/WG 6 - Manually portable forestry machinery
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Due Date: 10-Feb-2021
• Completion Date: 10-Feb-2021
• Directive: 2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
• Mandate: M/079 - Mandate to CEN and CENELEC for standardization in the field of machines
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Ref Project: oSIST prEN ISO 22867:2020 - Forestry and gardening machinery - Vibration test code for portable hand-held machines with internal combustion engine - Vibration at the handles (ISO/DIS 22867:2020)

RELATIONS

• Revised: EN ISO 22867:2011 - Forestry and gardening machinery - Vibration test code for portable hand-held machines with internal combustion engine - Vibration at the handles (ISO 22867:2011)
• Effective Date: 18-Apr-2018

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN ISO 22867:2020
01-oktober-2020

Gozdarski in vrtnarski stroji - Standard za meritev tresenja ročno vodenih strojev,

gnanih z motorjem z notranjim zgorevanjem - Tresenje na ročajih (ISO/DIS
22867:2020)

Forestry and gardening machinery - Vibration test code for portable hand-held machines

with internal combustion engine - Vibration at the handles (ISO/DIS 22867:2020)
Forst- und Gartenmaschinen - Schwingungsmessnorm für handgehaltene Maschinen mit
Verbrennungsmotor - Schwingungen an den Handgriffen (ISO/DIS 22867:2020)

Machines forestières et machines de jardin - Code d'essai des vibrations pour machines

portatives tenues à la main à moteur à combustion interne - Vibrations au niveau des

poignées (ISO/DIS 22867:2020)
Ta slovenski standard je istoveten z: prEN ISO 22867
ICS:
13.160 Vpliv vibracij in udarcev na Vibration and shock with
ljudi respect to human beings
65.060.80 Gozdarska oprema Forestry equipment
oSIST prEN ISO 22867:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 22867:2020
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oSIST prEN ISO 22867:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 22867
ISO/TC 23/SC 17 Secretariat: SIS
Voting begins on: Voting terminates on:
2020-08-10 2020-11-02
Forestry and gardening machinery — Vibration test
code for portable hand-held machines with internal
combustion engine — Vibration at the handles

Machines forestières et machines de jardin — Code d'essai des vibrations pour machines portatives tenues

à la main à moteur à combustion interne — Vibrations au niveau des poignées
ICS: 13.160; 65.060.80
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 22867:2020(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2020
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oSIST prEN ISO 22867:2020
ISO/DIS 22867:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
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oSIST prEN ISO 22867:2020
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Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Vibration quantities to be measured and determined ................................................................................................. 2

5 Instrumentation .................................................................................................................................................................................................... 2

5.1 General ........................................................................................................................................................................................................... 2

5.2 Accelerometer .......................................................................................................................................................................................... 2

5.3 Fastening of accelerometer .......................................................................................................................................................... 2

5.4 Calibration .................................................................................................................................................................................................. 2

5.5 Speed indicator ....................................................................................................................................................................................... 2

6 Measurement direction and location .............................................................................................................................................. 3

7 Test and operating conditions of machine ................................................................................................................................ 3

8 Measurement and calculation ................................................................................................................................................................ 3

8.1 General ........................................................................................................................................................................................................... 3

8.2 Validity of measured data .............................................................................................................................................................. 4

9 Information to be reported ....................................................................................................................................................................... 5

10 Declaration and verification of vibration values ................................................................................................................ 6

Annex A (normative) Chain-saws ............................................................................................................................................................................. 8

Annex B (normative) Brush cutters, grass-trimmers and hand-held edgers ..........................................................12

Annex C (normative) Pole-mounted powered pruners ..................................................................................................................17

Annex D (normative) Hedge trimmers ............................................................................................................................................................20

Annex E (normative) Garden blowers/vacuums ...................................................................................................................................25

Annex F (informative) Summary of results from "round robin" tests, 2007-2008, on a chain-

saw, brush saw and grass trimmer .................................................................................................................................................29

Annex ZA (informative) Relationship between this International Standard and the

requirements of EU Directive 2006/42/EC aimed to be covered ....................................................................30

Bibliography .............................................................................................................................................................................................................................31

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Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture

and forestry, Subcommittee SC 17, Manually portable machinery.

This third edition cancels and replaces the second edition (ISO 22867:2011), which has been technically

revised.
The main changes compared to the previous edition are as follows:
— the scope has been expanded to include hand-held edgers.

— the accelerometer position for pole-mounted powered pruners and long-reach hedge trimmers has

been newly defined to better reflect handling of the machine in use.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
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Introduction
This document is a type-C standard as stated in ISO 12100.

This document is of relevance, in particular, for the following stakeholder groups representing the

market players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);

— health and safety bodies (regulators, accident prevention organisations, market surveillance etc.)

Others can be affected by the level of machinery safety achieved with the means of the document by the

above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);

— machine users/employees (e.g. trade unions, organizations for people with special needs);

— service providers, e. g. for maintenance (small, medium and large enterprises);

— consumers (in case of machinery intended for use by consumers).

The above-mentioned stakeholder groups have been given the possibility to participate at the drafting

process of this document. The machinery concerned and the extent to which hazards, hazardous

situations or hazardous events are covered are indicated in the Scope of this document.

When requirements of this type-C standard are different from those which are stated in type-A or -B

standards, the requirements of this type-C standard take precedence over the requirements of the

other standards for machines that have been designed and built according to the requirements of this

type-C standard.

The vibration test code specified in this International Standard is based on ISO 20643, which gives

general specifications for the measurement of the vibration emission of hand-held machinery. It

differs from ISO 20643 in the number of operators required to be involved in the test, with ISO 20643

requiring at least three operators and this International Standard only one. Another difference is that

this International Standard primarily positions the transducers next to the hand in the area between

the thumb and the index finger, where they present the least disturbance to the operator gripping the

machine.
The determination of vibration characteristics is primarily used for
— manufacturer's declarations,
— comparing data between machines in the machine family concerned,
— development work at the design stage, and

— the estimation of the vibration risk considering the specific conditions (parameters).

The use of this vibration test code will ensure reproducibility of the determination of the vibration

characteristics. Measurements made during particular operating modes are of interest for assessment

of the vibration exposure, for example, over a typical working day.

The work cycles chosen for this test code are based on the following considerations of application:

a) chain-saws with an engine displacement of < 80 cm are used for various operations, including

felling, bucking and delimbing;

b) chain-saws with an engine displacement of ≥ 80 cm are normally used for felling and bucking.

Delimbing will cause the saw to run at racing speed; therefore, racing is included only for saws with a

< 80 cm engine.
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For brush-cutters, grass-trimmers, hedge-trimmers and pole-mounted powered pruners, the cutting

mode (full load) is estimated to be valid only for short periods, and racing and idling are the two

dominant modes. Moreover, the cutting mode has also been found to be diverse and not able to be

performed under repeatable conditions.

For trimmers, the full-load and racing modes are integrated into a single mode, owing to the loading

effect of the flexible line.

For brush-cutters, hedge-trimmers, edgers and pole-mounted powered pruners, it is not possible to

simulate the full-load mode in a feasible way, since there are no constant load conditions comparable

to those of chain-saws. Since the operating mode “racing” is the worst case, it is taken as being

representative.
For garden-blowers, full load and idling are the two dominant modes.

In either of these cases, transport and other tasks between operations will cause the machine to run

at idling. Experience has led to the conclusion that equal duration for the different working modes is

a good estimation of daily exposure. The values obtained are values intended to be representative of

the average of typical vibration magnitudes in real-world use of the machines. However, the actual

magnitudes will vary considerably from time to time and will depend on many factors, including

operator, task and cutting attachment. The state of maintenance of the machine itself might also be of

importance.
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oSIST prEN ISO 22867:2020
DRAFT INTERNATIONAL STANDARD ISO/DIS 22867:2020(E)
Forestry and gardening machinery — Vibration test
code for portable hand-held machines with internal
combustion engine — Vibration at the handles

CAUTION — Some of the test procedures specified in this document involve processes which

could lead to a hazardous situation. Any person performing tests in accordance with this

document shall be appropriately trained in the type of work to be carried out. All national

regulatory conditions and health and safety requirements shall be followed
1 Scope

This document specifies a vibration test code for determining, efficiently and under standardized

conditions, the magnitude of vibration at the handles of portable hand-held, internal-combustion-

engine-powered forest and garden machinery, including chain-saws, brush-cutters, grass-trimmers,

edgers, pole-mounted powered pruners, hedge-trimmers and garden-blowers.

Although the magnitudes measured are obtained in an artificial operation, they nevertheless give an

indication of the values to be found in a real work situation.

Vibration test codes as described in this document enable the manufacturer to verify the effort

regarding low vibration design.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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.

ISO 5349-2:2001, Mechanical vibration — Measurement and evaluation of human exposure to hand-

transmitted vibration — Part 2: Practical guidance for measurement at the workplace

ISO 6531, Machinery for forestry — Portable chain-saws — Vocabulary

ISO 7112, Machinery for forestry — Portable brush-cutters and grass-trimmers — Vocabulary

ISO 7293, Forestry machinery — Portable chain saws — Engine performance and fuel consumption

ISO 8041, Human response to vibration — Measuring instrumentation

ISO 8893, Forestry machinery — Portable brush-cutters and grass-trimmers — Engine performance and

fuel consumption

ISO 16063 (all parts), — Methods for the calibration of vibration and shock transducers

ISO 20643, Mechanical vibration — Hand-held and hand-guided machinery — Principles for evaluation of

vibration emission
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 6531, ISO 7112 and

ISO 20643 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
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— IEC Electropedia: available at http:// www .electropedia .org/
4 Vibration quantities to be measured and determined

The quantities to be measured are the frequency-weighted accelerations in the three perpendicular

directions, a , a and a .
hwx hwy hwz

The quantities to be determined are the vibration total values, a , and the equivalent vibration total

values, a , for each handle. See the calculations in Annexes A to E.
hv,eq

NOTE Mathematically, a is the root sum of the squares of the three root-mean-square (r.m.s.) single-axis

acceleration values of the frequency-weighted hand transmitted vibration values a , a and a .

hwx hwy hwz
5 Instrumentation
5.1 General
The vibration measurement system shall be in accordance with ISO 8041.
5.2 Accelerometer

The total mass of the vibration accelerometer giving the acceleration in the three directions at each

measuring position shall be as low as possible, and shall not in any case exceed 25 g, including the

mounting but excluding the cable. For further information, see ISO 5349-2:2001, 6.1.5.

NOTE The accelerometer is a sensitive element intended to pick up the vibration and to convert it into

electrical signals. A tri-axial accelerometer will permit simultaneous measurements in the x, y and z axes.

5.3 Fastening of accelerometer

The accelerometer shall be mounted firmly on the handle by means of a fastening device, in accordance

with ISO 5349-2.

For measurement on handles with resilient covers (e.g. cushioned handle), mount the accelerometer in

accordance with ISO 5349-2:2001, 6.1.4.2, and perform one or the other of the following actions:

— remove the resilient material from the area beneath the transducers;

— fix the transducers using a force which fully compresses the resilient material.

Mountings shall be in accordance with ISO 5349-2:2001, D.2.2 and D.2.3; the method given in

ISO 5349-2:2001, D.2.4, shall not be used.
5.4 Calibration
The accelerometer shall be calibrated in accordance with ISO 16063.

The whole measuring chain, including the accelerometer, shall be checked before and after a sequence

of measurements using a calibrator which produces known accelerations at a known frequency. These

in-situ checks shall be carried out in accordance with ISO 8041.
5.5 Speed indicator

The rotational frequency of the engine shall be measured with an accuracy of ±1,0 % of the reading.

The speed indicator and its engagement with the machine shall not affect the operation of the machine

under test.
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6 Measurement direction and location

Measurements shall be made at each hand-grip at which the operator normally holds the machine.

Measurements shall be made simultaneously in the three directions x, y and z.

The centre of gravity of the accelerometer shall be positioned at a maximum distance of 20 mm from

the handle contour. One of the axes of the accelerometer shall be parallel to the axis of the handle.

The position of the accelerometer shall be as near as possible to the hand without obstructing normal grip.

NOTE The specific conditions for each type of machine are given in Annexes A to E.

7 Test and operating conditions of machine

Measurements shall be carried out on a new machine, featuring standard equipment as provided by the

manufacturer, and with the fuel and oil tank(s) at least half-filled.

The engine shall be run-in prior to the test according to the manufacturer's recommendations. The

engine shall be at a stable normal operating temperature before the test is commenced.

The carburettor shall be set, where applicable, according to the instructions of the manufacturer.

The engine speed for all test modes shall be kept constant to within ±3,5 r/s during testing. No alteration

to the initial settings is permitted once measurements have commenced. If adjustment becomes

necessary, the test shall be restarted after the adjustment.

The measured vibration of the machine is influenced by the operator. The operator shall therefore be

skilled and able to operate the machine properly. The machine shall be held in a manner consistent with

day-long use of the machine. Hand-held machines, except those suspended by harness, shall be held so

that there is no contact with the operator's body during measurements.

A test to obtain the required data for a given operating mode shall consist of a minimum of four

measurements, with a short break and a significant change of engine speed (to idling or racing speed,

as applicable) between measurements. Stable speed conditions (constant to within ±3,5 r/s) shall be

obtained before testing is continued.

At least four separate periods of vibration data shall be obtained, totalling at least 20 s.

Each signal duration used shall be at least 2 s, during which the engine speed shall be maintained within

±3,5 r/s.

The measurements shall be continued until the validity requirements given in Clause 8 are fulfilled.

The collection of data for the different operating modes need not be carried out in any particular

sequence.

NOTE The specific conditions for each type of machine are given in Annexes A to E.

8 Measurement and calculation
8.1 General

The following measurements and calculations shall be made and are generally performed in the

sequence given here and as illustrated by Figure 1.

a) Measure the weighted acceleration of an operating mode in the three directions, a , a and

hwx,J hwy,J

a , for the left and right handles, where J is the operating mode idling (Id), full load (Fl) or

hwz,J
racing (Ra).
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b) Calculate the root sum of squares of accelerations a of the three directions x, y and z for the

hvJ
operating mode selected.
c) Repeat a) and b) at least three more times.
d) Calculate the arithmetic mean of the operating mode, hvJ

e) Repeat a), b) and d) until the coefficient of variation C and the standard deviation s comply with

v n−1
the requirements of 8.2.

f) Perform a) to e) for the remaining operating modes in accordance with the annex applicable to the

type of machine.

g) Calculate the equivalent vibration total value, a , for each handle in accordance with the annex

hv,eq
applicable to the type of machine.
h) Determine the declared value according to Clause 10.
Band pass filter.
Frequency weighting filter.
Root mean square (r.m.s).
See Note to Clause 4.
Arithmetic mean for each operating mode.
See Annexes A to E for calculation of a .
hv,eq

Figure 1 — Sequence of measurement and calculation of vibration data from the applicable

operating modes
8.2 Validity of measured data

The measured data for every combination of handle and operating mode shall be considered valid

when either

a) the coefficient of variation, C , of the consecutive weighted values is less than 0,3, or

b) the standard deviation, s , is less than 0,4 m/s .
n−1
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If C is greater than 0,15 or if s is greater than 0,3 m/s , the measurements shall be checked for error

v n−1
before the data are accepted.

If the measured values for a combination of handle and operating mode do not meet either criterion a)

or b), then measurements and calculations with the non-complying combination shall be repeated until

one or the other of these validity criteria is met (see 8.1 e)).

The coefficient of variation, C , of a test series is the ratio between the standard deviation, s , of the

v n−1

series of measurement values and the mean value, x of the series, determined by Formula (1):

n−1
c = (1)
with s calculated using Formula (2)
n-1
n−=1 xx− (2)
∑ i
n−1
i=1
and x calculated using Formula (3)
x= x (3)
i=1
where
x [1] is the i-th value measured;
n [2] is the number of measurement values.
9 Information to be reported

The following information shall be compiled and reported for all measurements made in accordance

with this International Standard.
a) Machine under test:

1) description of machine, including engine displacement, manufacturer, type and serial number,

type of cutting equipment (where applicable);
2) operating conditions, in accordance with Table 1.
b) Work piece, where applicable.
c) Instrumentation:

1) equipment used for the measurements, including name, type, serial number and manufacturer;

2) methods used to fasten accelerometers;
3) method used to calibrate the instrumentation system;
4) date and place of most recent calibration of accelerometer calibrator.
d) Vibration and other data:
1) location of accelerometer positions (a sketch may be included, if necessary);

2) measurement values and arithmetic mean values for each handle and cutting attachment

(where applicable) in accordance with Table 1;
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3) remarks, if any;
4) air temperature;
5) date and place of measurements.

Table 1 — Table for reporting determined vibration total values and calculation of their

arithmetic means for each handle
Specified handle
Calculated data Operating
Operating mode and validity cri- engine speed Test no.
teria r/s
1 2 3 4 n
Idling (Id) a (m/s )
hv,Id
2 — — —
hv,ld (m/s )
s (m/s ) — — —
n−1
C — — —
a 2
Full load (Fl) a (m/s )
hv,FI
— — —
hv,Fl (m/s )
s (m/s ) — — —
n−1
C — — —
a 2
Racing (Ra) a (m/s )
hv,Ra
— — —
hv,Ra (m/s )
s (m/s ) — — —
n−1
C — — —

The vibration total values a are determined and recorded, and their arithmetic mean, hv is calculated until the

coefficient of variation, C , is less than 0,3, or the standard deviation, s , is less than 0,4.

v n−1

If C is greater than 0,15 or if s is greater than 0,3 m/s , the measurements shall be checked for error before the data are

v n−1
accepted.

The calculation of arithmetic mean hv is based on at least four determinations of the vibration total value a .

a a a

The values for the arithmetic mean ( hv,ld , hv,Fl and hv,Ra ) are used to calculate the equivalent vibration total

values a .
hv,eq

According to the test procedures for the specific machine type given in Annexes A to E.

10 Declaration and verification of vibrati
...