IEC_60079-29-1-2016.pdf

IEC 60079-29-1 Edition 2.0 2016-07 INTER NA TIONA L STA NDA R D Ex plosive atmospheres Part 29-1:Gas detectors Performance requirements of detectors for flammable gases IEC 60079-29-1:2016-07(en)Copyright International Electrotechnical Commission THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2016 IEC,Geneva,Switzerland All r ights r eserved.Unless otherwise specif ied,no par t of this publication may be reproduced or utilized in any f orm or by any means,electr onic or mechanical,including photocopying and microfilm,without permission in writing f rom 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 r ights to this publication,please contact the addr ess below or your local IEC member National Committee f or fur ther information.IEC Central Office Tel.:+41 22 919 02 11 3,r ue de Varemb Fax:+41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzer land www.iec.ch About the IEC The Inter national Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standar ds f or all electrical,electr onic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sur e that you have the latest edition,a corrigenda or an amendment might have been published.IEC Catalogue-webstore.iec.ch/cat alogue The stand-alone application for consulting the entir e bibliographical information on IEC International Standards,Technical Specifications,Technical Reports and other documents.A vailable for PC,Mac OS,A ndroid Tablets and iPad.IEC publicat ions search-www.iec.ch/searchpub The advanced search enables to find IEC publications by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,replaced and withdraw n publications.IEC Just Published-webstore.iec.ch/just published Stay up to date on all new IEC publications.Just Published details all new publications released.A vailable online and also once a month by email.Electropedia-www.electropedia.org The worlds leading online dictionar y of electronic and electrical terms containing 20 000 terms and definitions in English and French,with equivalent terms in 15 additional languages.A lso known as the International Electrotechnical Vocabular y (IEV)online.IEC Glossar y -st d.iec.ch/glossary 65 000 electrotechnical terminology entries in English and French ex tracted from the Ter ms and Definitions clause of IEC publications issued since 2002.Some entries have been collected from earlier publications of IEC TC 37,77,86 and CISPR.IEC Cust omer Service Centre-webst ore.iec.ch/csc If you wish to give us y our feedback on this publication or need further assistance,please contact the Customer Service Centre:csciec.ch.Copyright International Electrotechnical Commission IEC 60079-29-1 Edition 2.0 2016-07 INTERNA TIONA L STA NDA R D Explosive atmospheres Part 29-1:Gas detectors Performance requirements of detectors for flammable gases INTER NA TIONAL ELECTROTECHNICAL COMMISSION ICS 29.260.20 ISBN 978-2-8322-3539-3 Registered t rademark of t he Int ernational Electrot echnical Commission W arning!Make sure that you obtained this publication from an authorized distributor.Copyright International Electrotechnical Commission 2 IEC 60079-29-1:2016 IEC 2016 CONTENTS FOREWORD.4 INTRODUCTION.8 1 Scope.9 2 Normative ref erences.10 3 Terms and def initions.10 4 General requirements.15 4.1 Overview.15 4.1.1 Manuf acturer claims.15 4.1.2 Equipment ratings.16 4.2 Construction.16 4.2.1 General.16 4.2.2 Indicating devices.16 4.2.3 Alarm signals.18 4.2.4 Fault signals.18 4.2.5 Adjustments.19 4.2.6 Battery-powered equipment.19 4.2.7 Gas detection transmitter f or use with separate gas detection control units.19 4.2.8 Separate gas detection control units f or use with gas detection transmitter(s).19 4.2.9 Sof tware-controlled equipment.20 4.3 Marking.21 4.4 Instruction manual.21 5 Test methods.23 5.1 Overview.23 5.2 General requirements f or tests.24 5.2.1 General.24 5.2.2 Samples and sequence of tests.24 5.2.3 Preparation of equipment bef ore testing.24 5.2.4 Mask f or calibration and tests.25 5.3 Normal conditions f or test.25 5.3.1 General.25 5.3.2 Test gas(es).25 5.3.3 Standard test gas.26 5.3.4 Flow rate f or test gases.26 5.3.5 Voltage.26 5.3.6 Temperature.26 5.3.7 Pressure.27 5.3.8 Humidity.27 5.3.9 Acclimation time.27 5.3.10 Orientation.27 5.3.11 Communications options.27 5.3.12 Gas detection equipment as part of systems.27 5.4 Test methods.27 5.4.1 General.27 5.4.2 Unpowered storage.28 5.4.3 Calibration and adjustment.28 Copyright International Electrotechnical Commission IEC 60079-29-1:2016 IEC 2016 3 5.4.4 Stability.29 5.4.5 Alarm set point(s).30 5.4.6 Temperature.30 5.4.7 Pressure.31 5.4.8 Humidity of test gas.31 5.4.9 Air velocity.31 5.4.10 Flow rate f or aspirated equipment.32 5.4.11 Orientation.32