Mechanical vibration - Laboratory method for evaluating vehicle seat vibration - Part 1: Basic requirements - Amendment 1 (ISO 10326-1:1992/Amd 1:2007)

This part of ISO 10326 specifies basic requirements for laboratory testing of vibration transmission through a vehicle seat to the occupant. These methods for measurement and analysis will make it possible to compare test results from different laboratories.  It specifies the test method, the instrumentation requirements, the measuring assessment method and the way to report the test result.  This part of ISO 10326 applies to specific laboratory seat tests which evaluate vibration transmission to the occupants of any type of seat used in vehicles and mobile off-road machinery.  Application standards for specific vehicles should refer to this part of ISO 10326 when defining the test input vibration that is typical for the vibration characteristics of the type or class of vehicle or machinery in which the seat is to be fitted.

Mechanische Schwingungen - Laborverfahren zur Bewertung der Schwingungen von Fahrzeugsitzen - Grundlegende Anforderungen (ISO 10326-1:1992/Amd 1:2007)

Der letzte Satz des 1. Absatzes ist durch den folgenden zu ersetzen:
Diese Verfahren zur Messung und Analyse ermög¬lichen es, die von verschiedenen Laboratorien ermittelten Prüfergebnisse gleichartiger Sitze miteinander zu ver¬gleichen.

Vibrations mécaniques - Méthode en laboratoire pour l'évaluation des vibrations du siege de véhicule - Partie 1: Exigences de base - Amendement 1 (ISO 10326-1:1992/Amd 1:2007)

Mehanske vibracije - Laboratorijska metoda za ovrednotenje vibracij sedežev vozil - 1. del: Osnovne zahteve - Dopolnilo 1 (ISO 10326-1:1992/Amd 1:2007)

Ta del standarda ISO 10326 določa osnovne zahteve za laboratorijsko preskušanje prenosa vibracij prek sedeža vozila na uporabnika. Te metode za merjenje in analizo bodo omogočile primerjavo rezultatov preskusov iz različnih laboratorijev.  Standard določa preskusno metodo, merilne zahteve, metodo za ovrednotenje merjenja in način za sporočanje rezultata preskusa.  Ta del standarda ISO 10326 se uporablja za posebne laboratorijske preskuse sedežev za vrednotenje prenosa vibracij na uporabnika katere koli vrste sedeža, ki se uporablja v vozilih in mobilnih terenskih strojih.  Standardi uporabe za posebna vozila naj bi se sklicevali na ta del standarda ISO 10326 pri določanju preskusne vhodne vibracije, ki je običajna za vibracijske značilnosti vrste ali razreda vozila oziroma stroja, v katerega se bo namestil sedež.

General Information

Status
Withdrawn
Publication Date
20-Jan-2008
Withdrawal Date
08-Dec-2016
Technical Committee
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
09-Dec-2016
Due Date
01-Jan-2017
Completion Date
09-Dec-2016

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SLOVENSKI STANDARD
SIST EN 30326-1:2000/A1:2008
01-marec-2008
Mehanske vibracije - Laboratorijska metoda za ovrednotenje vibracij sedežev vozil
- 1. del: Osnovne zahteve - Dopolnilo 1 (ISO 10326-1:1992/Amd 1:2007)
Mechanical vibration - Laboratory method for evaluating vehicle seat vibration - Part 1:
Basic requirements - Amendment 1 (ISO 10326-1:1992/Amd 1:2007)
Mechanische Schwingungen - Laborverfahren zur Bewertung der Schwingungen von
Fahrzeugsitzen - Grundlegende Anforderungen (ISO 10326-1:1992/Amd 1:2007)
Vibrations mécaniques - Méthode en laboratoire pour l'évaluation des vibrations du siege
de véhicule - Partie 1: Exigences de base - Amendement 1 (ISO 10326-1:1992/Amd
1:2007)
Ta slovenski standard je istoveten z: EN 30326-1:1994/A1:2007
ICS:
13.160
43.020
45.020
SIST EN 30326-1:2000/A1:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

EUROPEAN STANDARD
EN 30326-1:1994/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2007
ICS 65.060.10; 53.100; 43.020; 13.160

English Version
Mechanical vibration - Laboratory method for evaluating vehicle
seat vibration - Part 1: Basic requirements - Amendment 1 (ISO
10326-1:1992/Amd 1:2007)
Vibrations mécaniques - Méthode en laboratoire pour Mechanische Schwingungen - Laborverfahren zur
l'évaluation des vibrations du siège de véhicule - Partie 1: Bewertung der Schwingungen von Fahrzeugsitzen - Teil 1:
Exigences de base - Amendement 1 (ISO 10326- Grundlegende Anforderungen - Änderung 1 (ISO 10326-
1:1992/Amd 1:2007) 1:1992/Amd 1:2007)
This amendment A1 modifies the European Standard EN 30326-1:1994; it was approved by CEN on 1 September 2007.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this
amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references concerning such
national standards may be obtained on application to the CEN Management Centre or to any CEN member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 30326-1:1994/A1:2007: E
worldwide for CEN national Members.

---------------------- Page: 2 ----------------------

EN ISO 30326-1:1994/A1:2007 (E)
Contents Page
Foreword.3
Annex ZA (normative) Normative references to international publications with their
corresponding European publications.4
Annex ZB (informative) Relationship between this Amendment and the Essential Requirements
of EU Directive 98/37/EC, amended by Directive 98/79/EC.5
Annex ZC (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC .6


2

---------------------- Page: 3 ----------------------

EN ISO 30326-1:1994/A1:2007 (E)
Foreword
This document (EN 30326-1:1994/A1:2007) has been prepared by Technical Committee CEN/TC 231
"Mechanical vibration and shock", the secretariat of which is held by DIN, in collaboration with Technical
Committee ISO/TC 108 "Mechanical vibration and shock".
This Amendment to the European Standard EN ISO 30326:1994 shall be given the status of a national
standard, either by publication of an identical text or by endorsement, at the latest by March 2008, and
conflicting national standards shall be withdrawn at the latest by March 2008.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EC Directive(s).
For relationship with EC Directive(s), see normative Annex ZA , informative ZB and ZC, which is an integral
part of this document.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.


3

---------------------- Page: 4 ----------------------

EN ISO 30326-1:1994/A1:2007 (E)

Annex ZA
(normative)

Normative references to international publications with their
corresponding European publications


The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

Publication Year Title EN Year
ISO 2631-1 1) Mechanical vibration and shock —
Evaluation of human exposure to
whole-body vibration — Part 1:
General requirements
ISO 5347 (All parts) Methods for the calibration of
vibration and shock pick-ups
2)
ISO 8041 1) Human response to vibration — EN ISO 8041
2005
Measuring instrumentation
ISO 16063-1 1) Methods for the calibration of
vibration and shock transducers —
Part 1: Basic concepts
ISO 16063 (All parts) Methods for the calibration of
vibration and shock transducers


1) Undated reference.
2) Valid edition at date of issue.


4

---------------------- Page: 5 ----------------------

EN ISO 30326-1:1994/A1:2007 (E)
Annex ZB
(informative)

Relationship between this Amendment and the Essential Requirements
of EU Directive 98/37/EC, amended by Directive 98/79/EC


This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide one means of conforming to Essential Requirements of
the New Approach Directive 98/37/EC on machinery, amended by 98/79/EC.

Once this standard is cited in the Official Journal of the European Communities under that Directive and has
been implemented as a national standard in at least one Member State, compliance with the normative
clauses of this standard confers, within the limits of the scope of this standard, a presumption of conformity
with the relevant Essential Requirements 1.5.9 and 3.2.2 of that Directive and associated EFTA regulations.


WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling
within the scope of this standard.

5

---------------------- Page: 6 ----------------------

EN ISO 30326-1:1994/A1:2007 (E)
Annex ZC
(informative)

Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC


This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide a means of conforming to Essential Requirements of the
New Approach Directive 2006/42/EC on machinery.

Once this standard is cited in the Official Journal of the European Communities under that Directive and has
been implemented as a national standard in at least one Member State, compliance with the normative
clauses of this standard confers, within the limits of the scope of this standard, a presumption of conformity
with the relevant Essential Requirements 1.1.8 and 1.5.9 of that Directive and associated EFTA regulations.


WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling
within the scope of this standard.

6

---------------------- Page: 7 ----------------------

INTERNATIONAL ISO
STANDARD 10326-1
First edition
1992-11-15
AMENDMENT 1
2007-09-15

Mechanical vibration — Laboratory
method for evaluating vehicle seat
vibration —
Part 1:
Basic requirements
AMENDMENT 1
Vibrations mécaniques — Méthode en laboratoire pour l'évaluation des
vibrations du siège de véhicule —
Partie 1: Exigences de base
AMENDEMENT 1




Reference number
ISO 10326-1:1992/Amd.1:2007(E)
©
ISO 2007

---------------------- Page: 8 ----------------------

ISO 10326-1:1992/Amd.1:2007(E)
PDF disclaimer
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shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.


COPYRIGHT PROTECTED DOCUMENT


©  ISO 2007
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
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Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland

ii © ISO 2007 – All rights reserved

---------------------- Page: 9 ----------------------

ISO 10326-1:1992/Amd.1:2007(E)
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
Amendment 1 to ISO 10326-1:1992 was prepared by the European Committee for Standardization (CEN)
Technical Committee CEN/TC 231, Mechanical vibration and shock, in collaboration with Technical
Committee ISO/TC 108, Mechanical vibration, shock and condition monitoring, Subcommittee SC 4, Human
exposure to mechanical vibration and shock, in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).

© ISO 2007 – All rights reserved iii

---------------------- Page: 10 ----------------------

ISO 10326-1:1992/Amd.1:2007(E)
Mechanical vibration — Laboratory method for evaluating
vehicle seat vibration —
Part 1:
Basic requirements
AMENDMENT 1
Page iii, Introduction
Replace the existing text with the following:
Drivers, staff and passengers of vehicles (land, air or water) and mobile machinery are exposed to
mechanical vibration which interferes with their comfort, working efficiency and, in some circumstances,
safety and health. Such vehicles and mobile machines are often fitted with seats that are designed and
made in accordance with current state-of-the-art with regard to their capacity to control or reduce
transmitted whole-body vibration.
To assist in the development of such seats, specific test codes have been, or are being, produced to
evaluate the performance of seats. The following basic requirements have therefore been developed to
give guidance for the specification of laboratory testing of vibration transmission through a vehicle seat to
the occupant, and for the evaluation of the ability of a seat to control the shock arising from over-travel of
the suspension.

Page 1, Clause 1, Scope
Replace the last sentence of the first paragraph with the following:
These methods for measurement and analysis make it possible to compare test results from different
laboratories for equivalent seats.

Page 1, Clause 2, Normative references
Replace this clause with the following:
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 2631-1, Mechanical vibration and shock — Evaluation of human exposure to whole-body vibration —
Part 1: General requirements
ISO 5347 (all parts), Methods for the calibration of vibration and shock pick-ups
ISO 8041, Human response to vibration — Measuring instrumentation
ISO 16063 (all parts), Methods for the calibration of vibration and shock transducers

© ISO 2007 – All rights reserved 1

---------------------- Page: 11 ----------------------

ISO 10326-1:1992/Amd.1:2007(E)
Page 1, C
...

SLOVENSKI SIST EN 30326-
1:2000/oprA1:2005

PREDSTANDARD
julij 2005
Mehanske vibracije - Laboratorijska metoda za ovrednotenje vibracij sedežev
vozil - 1. del: Osnovne zahteve – Dopolnilo 1 (ISO 10326-1:1992/DAM 1:2005)
Mechanical vibration - Laboratory method for evaluating vehicle seat vibration - Part
1: Basic requirements - Amendment 1 (ISO 10326-1:1992/DAM 1:2005)
ICS 13.160; 43.020; 45.020 Referenčna številka
SIST EN 30326-1:2000/oprA1:2005(en)
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

---------------------- Page: 1 ----------------------

EUROPEAN STANDARD
DRAFT
EN 30326-1:1994
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
May 2005
ICS
English version
Mechanical vibration - Laboratory method for evaluating vehicle
seat vibration - Part 1: Basic requirements - Amendment 1 (ISO
10326-1:1992/DAM 1:2005)
Vibrations mécaniques - Méthode en laboratoire pour
l'évaluation des vibrations du siège de véhicule - Partie 1:
Exigences de base - Amendement 1 (ISO 10326-
1:1992/DAM 1:2005)
This draft amendment is submitted to CEN members for parallel enquiry. It has been drawn up by the Technical Committee CEN/TC 231.
This draft amendment A1, if approved, will modify the European Standard EN 30326-1:1994. If this draft becomes an amendment, CEN
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment
into the relevant national standard without any alteration.
This draft amendment was established by CEN 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 Management Centre has the same status
as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 30326-1:1994/A1:2005:2005: E
worldwide for CEN national Members.

---------------------- Page: 2 ----------------------

EN 30326-1:1994/prA1:2005 (E)




Foreword

This document (EN 30326-1:1994/prA1:2005) has been prepared by Technical Committee
CEN/TC 231 "Mechanical vibration and shock", the secretariat of which is held by DIN, in
collaboration with Technical Committee ISO/TC 108 "Mechanical vibration and shock".

This document is currently submitted to the parallel Enquiry.

This document has been prepared under a mandate given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements
of EU Directive(s).

For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of
this document.


2

---------------------- Page: 3 ----------------------

EN 30326-1:1994/prA1:2005 (E)

ANNEX ZA
(informative)

Relationship between this European Standard and the
Essential Requirements of EU Directive 98/37 EEC

This European Standard has been prepared under a mandate given to CEN by the European

Commission and the European Free Trade Association to provide a means of conforming to
Essential Requirements of the New Approach Directive 98/37 EEC, amended by Directive
98/79/EEC.

Once this standard is cited in the Official Journal of the European Communities under that
Directive and has been implemented as a national standard in at least one Member State,
compliance with the normative clauses of this standard confers, within the limits of the scope
of this standard, a presumption of conformity with the corresponding Essential Requirements
of that Directive and associated EFTA regulations.
WARNING: Other requirements and other EU Directives may be applicable to the product(s)
falling within the scope of this standard.



3

---------------------- Page: 4 ----------------------

DRAFT AMENDMENT ISO 10326-1:1992/DAmd 1
ISO/TC 108/SC 4 Secretariat: DIN
Voting begins on: Voting terminates on:
2005-05-19 2005-10-19
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION
Mechanical vibration — Laboratory method for evaluating
vehicle seat vibration —
Part 1:
Basic requirements
AMENDMENT 1
Vibrations mécaniques — Méthode en laboratoire pour l'évaluation des vibrations du siège de véhicule —
Partie 1: Exigences de base
AMENDEMENT 1
ICS 13.160; 43.020; 53.100; 65.060.10

ISO/CEN PARALLEL ENQUIRY
This draft International Standard is a draft standard developed within the European Committee for
Standardization (CEN) and processed under the CEN-lead mode of collaboration as defined in the
Vienna Agreement. The document has been transmitted by CEN to ISO for circulation for ISO member
body voting in parallel with CEN enquiry. Comments received from ISO member bodies, including those
from non-CEN members, will be considered by the appropriate CEN technical body. Should this DIS be
accepted, a final draft, established on the basis of comments received, will be submitted to a parallel two-
month FDIS vote in ISO and formal vote in CEN.
In accordance with the provisions of Council Resolution 15/1993 this document is circulated in
the English language only.
Conformément aux dispositions de la Résolution du Conseil 15/1993, ce document est distribué
en version anglaise seulement.
To expedite distribution, this document is circulated as received from the committee secretariat.
ISO Central Secretariat work of editing and text composition will be undertaken at publication
stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.
THIS DOCUMENT IS A DRAFT CIRCULATED 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 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 NATIONAL REGULATIONS.
© International Organization for Standardization, 2005

---------------------- Page: 5 ----------------------

ISO 10326-1:1992/DAmd 1
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not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the
unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
Copyright notice
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under the applicable laws of the user's country, neither this ISO draft nor any extract from it may be
reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, photocopying,
recording or otherwise, without prior written permission being secured.
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Violators may be prosecuted.
©
ii ISO 2005 – All rights reserved

---------------------- Page: 6 ----------------------

EN 30326-1:1994/prA1:2005(E)
EN 30326-1:1994 (ISO 10326-1:1992) is to be amended as follows.
2 Normative references,
replace ISO 2631-1:1985 with ISO 2631-1, Mechanical vibration and shock — Evaluation of human exposure
to whole-body vibration — Part 1: General requirements
replace ISO 5347-0:1987 with ISO 16063-1, Methods for the calibration of vibration and shock transducers —
Part 1: Basic concepts
remove date from ISO 8041:1990
3 General, replace second paragraph with the following:
The primary test for the vibration characteristics of the seat involves measurements under conditions which
simulate the range of actual uses of a vehicle or machine. For some applications, a secondary test is used to
ensure that the seat responds acceptably to occasional severe shocks or transient vibration. Given the
present state of knowledge, a test to evaluate the damping of the seat suspension end-stops is specified for
this purpose in Annex B which describes a method for assessing the accelerations associated with impact
with the suspension end-stops when over-travel occurs. That test can be used in addition to the damping test,
in particular for seats whose suspension travel is short, such as those intended for use on industrial trucks or
off-road vehicles.
8 Test input vibration, replace Note 9 with the following:
NOTE 9 In some cases, such as suspensions with short travel as used on industrial trucks or off-road vehicles, a further
test may be needed to ensure that, under conditions of excessive suspension travel, the suspension end-stops are so
constructed as to keep the resulting shock acceleration at an acceptable level. Annex B contains the specification for such
a test which may be specified in more detail in an application standard if needed.
Add to Annex A Bibliography the following:
ISO 5007, Agricultural wheeled tractors — Operator's seat — Laboratory measurement of transmitted
vibration
ISO 5353, Earth-moving machinery, and tractors and machinery for agriculture and forestry — Seat index
point
ISO 7096, Earth-moving machinery — Laboratory evaluation of operator seat vibration
EN 13490, Mechanical vibration — Industrial trucks — Laboratory evaluation and specification of operator
seat vibration
Add the following Annex B:
3

---------------------- Page: 7 ----------------------

EN 30326-1:1994/prA1:2005(E)
Annex B
(informative)
Test method for assessing the ability of a seat suspension to control the
effects of impacts caused by over-travel
B.1 Introduction
This annex specifies a laboratory test method for measuring and evaluating the effectiveness of a
suspension seat in controlling the whole-body vertical vibration transmitted to the operator of an industrial
truck or off-road vehicle in conditions that can cause excessive suspension travel.
The test method can be applicable to operator seats in the following types of vehicles:
 industrial trucks,
 earth-moving machines (restricted to classes defined in ISO 7096),
 agricultural tractors,

...

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