ISO INTERNATIONAL STANDARD 13753 First edition 1998-07-01 Mechanical vibration and shock - Hand-arm vibration Method for measuring the vibration transmissibility of resilient materials when loaded by the hand-arm system Vibrations et chocs mécaniques- Vibrations main-bras -Méthode pour mesurerle facteurdetransmission des vibrationsparlesmateriaux résilients chargés parle systeme main-bras TSO Reference number ISO13753:1998(E) IHS unde Not for Resale ISO 13753:1998(E) Foreword IsO (the International Organization for Standardization) is a worldwide federationofnationalstandardsbodies(lsOmemberbodies).Theworkof 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 SO, also take part in the work. isO collaborates closely with the International Electrotechnical Commission (lEC)onallmattersofelectrotechnicalstandardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International a vote. International Standard iSO 13753 was prepared by Technical Committee ISO/TC1o8,Mechanicalvibrationandshock,SubcommitteeSC4,Human exposure to mechanical vibration and shock, in close collaboration with CEN/TC 231, Mechanical vibration and shock. Annex A forms an integral part of this International Standard. Annexes B to F are for information only. @ISO1998 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 the publisher. InternationalOrganizationforStandardization Case postale 56 . CH-1211 Geneve 20 · Switzerland Internet [email protected] Printed in Switzerland from IHS Not for Resale ISO 13753:1998(E) @ ISO Introduction This International Standard was developed in response to the growing demandtoprotectpeoplefromtherisksofvibrationdamagecausedby exposuretohand-transmittedvibration. Various standards refer to measurement and assessment of risk to vibration exposure and to methods of type testing specific tools and processes. Resilient materials are used to cover handles and make gloves. It is hoped that both of these will reduce the magnitude of the vibration exposure. This International Standard describes a method of measuring the vibration In some cases the material may be of two or more layers forming a sheet. It is a laboratory measurement and offers a reproducible and reliable procedure This International Standard assumes that the material behaves in a linear way and that it has negligible mass compared with the mass loading. (A determines the impedance of the material when loaded by a mass gripped by the hand. This is done by measuring the transfer function of the mass-loaded material at all the required frequencies.The vibration transmission when loaded by the hand is computed using standard values of hand-arm impedance and the measured values of the material impedance. The impedances used in this International Standard are for the palm of the hand when gripping a circular handle. The resulting transmissibility may not be applicable to the fingers. The impedance for the Zh direction of the hand-arm system where the material is under annex B. If the results of this measurement procedure show transmissibilities greater than 0,6 at all frequencies up to 500 Hz, then the material would probably not provide greater attenuation in the practical situation in the same source. ili