BS ISO 7626-1:2011 BSl Standards Publication Mechanical vibration and shock - Experimental determination of mechanical mobility Part 1: Basic terms and definitions, and transducer specifications bsi. ..making excellence a habit. BS ISO 7626-1:2011 BRITISH STANDARD National foreword This British Standard is the UK implementation of IS0 7626-1:2011. It (squg eul (o) supersedes BS 6897-1:1987 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee GME/21,Mechanical vibration,shockand condition 1/2015, monitoring. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. @ BSI 2011 ISBN9780580673474 ICS 01.040.17; 17.160 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2011. Amendments issued since publication Date Text affected ML O/COJOSU) A 901 BS ISO 7626-1:2011 INTERNATIONAL ISO STANDARD 7626-1 Second edition 2011-07-15 H Mechanicalvibrationandshock Experimental determination of mechanical mobility - Part 1: Basic terms and definitions, and transducer specifications Vibrations et chocs mécaniques-Détermination experimentale de la mobilitemecanique- Partie 1:Termes etdefinitions fondamentaux et specification des transducteurs Reference number ISO 7626-1:2011(E) @ISO 2011 BS ISO 7626-1:2011 ISO 7626-1:2011(E) uL ( (D) 1/2015, NT COPYRIGHTPROTECTEDDOCUMENT ISO2011 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's member body in the country of the requester. ISO copyright office Casepostale56.CH-1211Geneva20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland i= @ Iso 2011All rights reserved BSISO7626-1:2011 ISO7626-1:2011(E) Contents Page Foreword .iv 1 Scope 2 Normative references.. 3 Terms,definitions,andsymbols 3.1 Terms and definitions ... 3.2 .8 4 Fundamentals and general relationships 5 Basic requirements forforce and motion measurement transducers.... .9 5.1 General.... 5.2 Requirementsformotionmeasurementtransducers. .9 5.3 Requirements forforcemeasurementtransducers.... 10 5.4 Requirementsfor impedanceheads and attachmentstothestructureundertest ... 10 6 Calibration 11 6.1 General... 11 6.2 Operationalcalibrations. 11 6.3 Basicandsupplementarytransducercalibrations. 7 Basic piezoelectrictransducer calibrations. 12 7.1 General..... 7.2 Sensitivity.. 7.3 Frequencyresponse 14 7.4 Accelerometertransversesensitivity. 15 7.5 15 7.6 Dimensions 7.7 Electrical impedance.... 15 7.8 Polarity...... 16 8 Supplementarycalibrations. 16 8.1 ...16 8.2 Linearity.. 16 8.3 Effectiveendmassofforcetransducersand impedanceheads 17 8.4 Compliance of impedance heads ...... 8.5 Supplementarycalibrationsnecessitatedbyenvironmental andsecondaryeffects.. .17 9 Presentation ofdata ..19 9.1 General.. .19 9.2 Logarithmic plotting... ..19 9.3 Alternative plotting methods..... Annex B (informative) Mobility as a frequency-response function ....... Annex C (informative)Determination of impedance head attachment compliance and damping ....28 Bibliography.. @ ISO 2011 All rights reserved ili BS ISO 7626-1:2011 ISO7626-1:2011(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 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/lEC Directives, Pa