IEC_60393-1-2008.pdf

IEC 60393-1Edition 3.0 2008-05INTERNATIONAL STANDARD Potentiometers for use in electronic equipment Part 1:Generic specification IEC 60393-1:2008(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2008 IEC,Geneva,Switzerland 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 IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee for further information.IEC Central Office 3,rue de Varemb CH-1211 Geneva 20 Switzerland Email:inmailiec.ch Web:www.iec.ch About the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigenda or an amendment might have been published.?Catalogue of IEC publications:www.iec.ch/searchpub The IEC on-line Catalogue enables you to search by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,withdrawn and replaced publications.?IEC Just Published:www.iec.ch/online_news/justpub Stay up to date on all new IEC publications.Just Published details twice a month all new publications released.Available on-line and also by email.?Electropedia:www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions in English and French,with equivalent terms in additional languages.Also known as the International Electrotechnical Vocabulary online.?Customer Service Centre:www.iec.ch/webstore/custserv If you wish to give us your feedback on this publication or need further assistance,please visit the Customer Service Centre FAQ or contact us:Email:csciec.ch Tel.:+41 22 919 02 11 Fax:+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.IEC 60393-1Edition 3.0 2008-05INTERNATIONAL STANDARD Potentiometers for use in electronic equipment Part 1:Generic specification INTERNATIONAL ELECTROTECHNICAL COMMISSION XDICS 31.040.20 PRICE CODEISBN 2-8318-9748-3 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 60393-1 IEC:2008(E)CONTENTS FOREWORD.6 1 General.8 1.1 Scope.8 1.2 Normative references.8 2 Technical data.10 2.1 Units and symbols.10 2.2 Terms and definitions.10 2.3 Preferred values.28 2.4 Marking.28 3 Assessment procedures.28 4 Test and measurement procedures.28 4.1 General.28 4.2 Standard atmospheric conditions.29 4.3 Drying.30 4.4 Visual examination and check of dimensions.30 4.5 Continuity(except for continuously rotating potentiometers).32 4.6 Element resistance.32 4.7 Terminal resistance.33 4.8 Maximum attenuation.33 4.9 Resistance law(conformity).33 4.10 Matching of the resistance law(for ganged potentiometers only).34 4.11 Switch contact resistance(when appropriate).34 4.12 Voltage proof(insulated styles only).38 4.13 Insulation resistance(insulated styles only).39 4.14 Variation of resistance with temperature.40 4.15 Rotational noise.42 4.16 Contact resistance at low-voltage levels.44 4.17 Setting ability(adjustability)and setting stability.45 4.18 Starting torque.49 4.19 Switch torque.49 4.20 End stop torque.50 4.21 Locking torque.50 4.22 Thrust and pull on shaft.51 4.23 Shaft run-out.52 4.24 Lateral run-out.53 4.25 Pilot(or spigot)diameter run-out.53 4.26 Shaft end play.54 4.27 Backlash.55 4.28 Dither.57 4.29 Output smoothness.58 4.30 Robustness of terminals.59 4.31 Sealing.60 4.32 Solderability.61 4.33 Resistance to soldering heat.61 4.34 Change of temperature.62 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.60393-1 IEC:2008(E)3 4.35 Vibration.63 4.36 Bump.64 4.37 Shock.64 4.38 Climatic sequence.65 4.39 Damp heat,steady state.67 4.40 Mechanical endurance(potentiometers).68 4.41 AC endurance testing of mains switches on capacitive loads.71 4.42 DC endurance testing of switches.73 4.43 Electrical endurance.74 4.44 Component solvent resistance.78 4.45 Solvent resistance of the marking.78 4.46 Microlinearity.79 4.47 Mounting(for surface mount potentiometers).81 4.48 Shear(adhesion)test.83 4.49 Substrate bending test(formerly bond strength of the end face plating).83 4.50 Solderability(for surface mount potentiometers).83 4.51 Resistance to soldering heat(for surface mou