Bsi bs en 60079 29 1 2016

BS EN 60079-29-1:2016 BSI Standards Publication Explosive atmospheres Part 29-1: Gas detectors — Performance requirements of detectors for flammable gases BS EN 60079-29-1:2016 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN 60079-29-1:2016 It is derived from IEC 60079-29-1:2016 It supersedes BS EN 60079-29-1:2007 which is withdrawn The CENELEC common modifications have been implemented at the appropriate places in the text The start and finish of each common modification is indicated in the text by tags  The UK participation in its preparation was entrusted by Technical Committee EXL/31, Equipment for explosive atmospheres, to Subcommittee EXL/31/1, Gas detectors A list of organizations represented on this subcommittee 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 © The British Standards Institution 2017 Published by BSI Standards Limited 2017 ISBN 978 580 79858 ICS 13.320; 29.260.20 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 January 2017 Amendments/corrigenda issued since publication Date Text affected BS EN 60079-29-1:2016 EUROPEAN STANDARD EN 60079-29-1 NORME EUROPÉENNE EUROPÄISCHE NORM December 2016 ICS 29.260.20 Supersedes EN 60079-29-1:2007 English Version Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of detectors for flammable gases (IEC 60079-29-1:2016 , modified) Atmosphères explosives - Partie 29-1: Détecteurs de gaz Exigences d'aptitude la fonction des détecteurs de gaz inflammables (IEC 60079-29-1:2016 , modifiée) Explosionsfähige Atmosphäre - Teil 29-1: Gasmessgeräte Anforderungen an das Betriebsverhalten von Geräten für die Messung brennbarer Gase (IEC 60079-29-1:2016 , modifiziert) This European Standard was approved by CENELEC on 2016-09-19 CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels © 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members Ref No EN 60079-29-1:2016 E EN 60079-29-1:2016 BS EN 60079-29-1:2016 EN 60079-29-1:2016 Contents –2– Page European foreword foreword �� Introduction �� 12 Introduction 1 Scope �� 13 Scope Normative references �� 14 Normative references Terms definitions �� 14 Terms and and definitions General requirements �� 19 General requirements 5 Test methods �� 26 Test methods Annexes �� 40 Annexes Annex ZA (normative) Normative references to international publications with their Annex ZA (normative) Normative references to international publications with their corresponding European publications �� corresponding European publications Annex ZZ (informative) Relationship between this European Standard and the essential Annex ZZ (informative) Relationship this European and�the essential requirements of Directive 2014/34/EUbetween [2014 OJ L96] aimed toStandard be covered �� requirements of Directive 2014/34/EU [2014 OJ L96] aimed to be covered .8 Bibliography �� 48 Bibliography BS EN 60079-29-1:2016 BS 60079-29-1:2016 ENEN60079-29-1:2016 EN 60079-29-1:2016 –3– European foreword The text of document 31/1257/FDIS, future edition of IEC 60079-29-1, prepared by IEC/TC 31 "Equipment for explosive atmospheres" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60079-29-1:2016 A draft amendment, which covers common modifications to IEC 60079-29-1 (31/1257/FDIS), was prepared by SC 31-9 "Electrical apparatus for the detection and measurement of combustible gases to be used in industrial and commercial potentially explosive atmospheres", of CLC/TC 31 "Electrical apparatus for potentially explosive atmospheres" and approved by CENELEC The following dates are fixed: • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2017-06-23 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2019-12-23 This document supersedes EN 60079-29-1:2007 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights Clauses, subclauses, notes, tables, figures and annexes which are additional to those in IEC 60079-29-1:2016 are prefixed “Z” This document has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive For the relationship with EU Directive see informative Annex ZZ, which is an integral part of this document Endorsement notice The text of the International Standard IEC 60079-29-1:2016 was approved by CENELEC as a European Standard with agreed common modifications BS EN 60079-29-1:2016 EN 60079-29-1:2016 –4– BS EN 60079-29-1:2016 EN 60079-29-1:2016 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies NOTE When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies NOTE Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu Publication Year Title EN/HD Year - - Electromagnetic compatibility - Electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen EN 50270 - - - Electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen - Requirements and tests for apparatus using software and/or digital technologies EN 50271 - IEC 60050-426 - International Electrotechnical Vocabulary Part 426: Equipment for explosive atmospheres - - IEC 60068-2-6 - Environmental testing Part 2-6: Tests - Test Fc: Vibration (sinusoidal) EN 60068-2-6 - IEC 60079-0 - Explosive atmospheres Part 0: Equipment - General requirements EN 60079-0 - IEC 60079-20-1 - Explosive atmospheres Part 20-1: Material characteristics for gas and vapour classification - Test methods and data EN 60079-20-1 - –5– BS EN 60079-29-1:2016 BS EN 60079-29-1:2016 EN 60079-29-1:2016 EN 60079-29-1:2016 Annex ZZ (informative) Relationship between this European Standard and the essential requirements of Directive 2014/34/EU [2014 OJ L96] aimed to be covered This European Standard has been prepared under a Commission’s standardization request [Full reference to the request “M/xxx” 1) to provide one voluntary means of conforming to essential requirements of Directive 2014/34/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to equipment and protective systems intended for use in potentially explosive atmospheres [2014 OJ L96] Once this standard is cited in the Official Journal of the European Union under that Directive, compliance with the normative clauses of this standard given in Table ZZ.1 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 Table ZZ.1 – Correspondence between this European Standard and Annex II of Directive 2014/34/EU [2014 OJ L96] Essential Requirements of Directive 2014/34/EU Clause(s) / sub-clause(s) of this EN 1.5.5 - 1.5.7 whole standard except 4.2.9 and 5.4.23 1.5.8 4.2.9, 5.4.23 Remarks / Notes WARNING — Presumption of conformity stays valid only as long as a reference to this European standard is maintained in the list published in the Official Journal of the European Union Users of this standard should consult frequently the latest list published in the Official Journal of the European Union WARNING — Other Union legislation may be applicable to the product(s) falling within the scope of this standard ——————— 1) Mandate not yet available BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 –6– CONTENTS FOREWORD � ��8 INTRODUCTION � �� 12 1 Scope � �� 13 Normative references �� 14 Terms and definitions � �� 14 General requirements �� 19 4.1 Overview �� 19 4.1.1 Manufacturer claims �� 19 4.1.2 Equipment ratings � �� 20 4.2 Construction � �� 20 4.2.1 General �� 20 4.2.2 Indicating devices �� 20 4.2.3 Alarm signals � �� 22 4.2.4 Fault signals �� 22 4.2.5 Adjustments �� 23 4.2.6 4.2.7 Gas detection transmitter for use with separate gas detection control units � �� 23 4.2.8 Separate gas detection control units for use with gas detection transmitter(s) �� 23 4.2.9 Battery-powered equipment �� 23 Apparatus using software and/or digital technologies �� 24 4.3 Marking �� 24 4.4 Instruction manual �� 24 Test methods � �� 26 5.1 Overview �� 26 5.2 General requirements for tests � �� 26 5.2.1 General �� 26 5.2.2 Samples and sequence of tests �� 26 5.2.3 Preparation of equipment before testing � �� 27 5.2.4 Mask for calibration and tests �� 28 Normal conditions for test �� 28 5.3 5.3.1 General �� 28 5.3.2 Test gas(es) � �� 28 5.3.3 Standard test gas �� 28 5.3.4 Flow rate for test gases �� 29 5.3.5 Voltage �� 29 5.3.6 Temperature �� 29 5.3.7 Pressure � �� 29 5.3.8 Humidity �� 29 5.3.9 5.3.10 Orientation �� 29 5.3.11 Communications options �� 30 5.3.12 Gas detection equipment as part of systems �� 30 Acclimation time �� 29 –7– 5.4 BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 Test methods � �� 30 5.4.1 General �� 30 5.4.2 Unpowered storage � �� 30 5.4.3 Calibration and adjustment �� 31 5.4.4 Stability �� 31 5.4.5 5.4.6 Temperature �� 33 5.4.7 Pressure � �� 33 5.4.8 Humidity of test gas �� 33 5.4.9 Air velocity � �� 34 5.4.10 Flow rate for aspirated equipment �� 34 5.4.11 Orientation �� 34 5.4.12 Vibration � �� 35 5.4.13 Drop test for portable and transportable equipment �� 35 5.4.14 Warm-up time �� 36 5.4.15 Time of response �� 36 5.4.16 High gas concentration operation above the measuring range �� 36 5.4.17 Battery capacity � �� 37 5.4.18 Power supply variations �� 37 5.4.19 Addition of sampling probe � �� 38 5.4.20 Other gases and poisons �� 38 5.4.21 Electromagnetic compatibility � �� 38 5.4.22 Field calibration kit �� 38 5.4.23 Verification of software and digital components �� 39 Alarm set point(s) �� 32 Annex A (normative) Performance requirements �� 40 Annex B (informative) Determination of time of response �� 46 B.1 Aspirated equipment � �� 46 B.1.1 Test rig �� 46 B.1.2 Equipment without internal pump �� 46 B.1.3 Equipment with internal pump�� 46 B.2 Equipment that samples by diffusion � �� 47 B.2.1 Calibration mask method �� 47 B.2.2 Diffusion or flow methods � �� 47 Bibliography � �� 48 Figure – Warm-up time in clean air (typical) � �� 19 Figure – Warm-up time in standard test gas (typical) �� 19 Figure B.1 – Schematic example of test rig for use with aspirated equipment � �� 47 Table A.1 – Performance requirements (1 of 6)�� 40 BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 –8– –4– BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 INTERNATIONAL ELECTROTECHNICAL COMMISSION EXPLOSIVE ATMOSPHERES – Part 29-1: Gas detectors – Performance requirements of detectors for flammable gases FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees) The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”) Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work International, governmental and nongovernmental organizations liaising with the IEC also participate in this preparation IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter 5) IEC itself does not provide any attestation of conformity Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity IEC is not responsible for any services carried out by independent certification bodies 6) All users should ensure that they have the latest edition of this publication 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications 8) Attention is drawn to the Normative references cited in this publication Use of the referenced publications is indispensable for the correct application of this publication 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights IEC shall not be held responsible for identifying any or all such patent rights International Standard IEC 60079-29-1 has been prepared by IEC technical committee 31: Equipment for explosive atmospheres This second edition of IEC 60079-29-1 cancels and replaces IEC 60079-29-1:2007 series and constitutes a technical revision Significant technical changes between IEC 60079-29-1, IEC 60079-29-1, Edition (2016), is as listed below: Significant changes with respect to IEC 60079-29-1:2007 the Edition first edition (2007), of and It shall be verified at +2 % above the minimum supply voltage fault limit that all output BS EN 60079-29-1:2016 functions are working properly even at the worst case load conditions – 38 – IEC 60079-29-1:2016 © IEC 2016 Analogue outputs shall be tested at the maximum output level Relays shall be able to energize at +2 % above the minimum supply voltage fault limit 5.4.19 Addition of sampling probe When it is intended to add a sampling probe, the equipment shall first be calibrated using clean air and the standard test gas without the sampling probe The sampling probe shall then be added, and clean air and standard test gas applied again 5.4.20 Other gases and poisons 5.4.20.1 Other gases The equipment shall be tested separately with the following gas mixtures: a) Group I equipment indicating up to a volume fraction of % methane in air: 1) a methane volume fraction of the standard test gas + a volume fraction of 13 % oxygen in nitrogen; BS EN 60079-29-1:2016 2) a methane volume fraction of the standard test gas + a volume fraction of % carbon – 36 – IEC 60079-29-1:2016 © IEC 2016 dioxide in air; 3) a methane volume fraction of the standard test gas + a volume fraction of 0,075 % 5.4.20.2ethane Poisons in air (applicable only to Group I equipment with catalytic or semiconductor sensors) b) Group I equipment indicating up to a volume fraction of 100 % methane in air: The1) equipment be exposed to a volume (1,0 ±of0,05) % oxygen methane air mixture a volumeshall fraction of 50 % methane + a fraction volume of fraction 6,5 % in in nitrogen; containing a volume fraction of (10 ± 1) ppm of hexamethyldisiloxane and shall perform in 2) a volume fraction ofdose 50 %of methane a volume fraction of % carbon dioxide in continuous operation until a (400 ± 20)+ ppm is reached nitrogen; NOTE might be present+ ina industrial atmospheres can%lead to "poisoning" or other 3) a Certain volumematerials fractionthat of 50 % methane volume fraction of 2,5 ethane in nitrogen undesirable effects which can result in a change of sensitivity of a gas sensor The gas mixtures may be prepared by any suitable method The tolerances on the volume NOTE As improved tolerances to these materials are frequently claimed by manufacturers, evidence of the fraction of eachused component shall these be within of results its nominal testing procedure to substantiate claims±10 and% test can be concentration open to validation or verification by agreement between a purchaser, a manufacturer, and a testing laboratory Possible "poisoning" agents and their BS EN 60079-29-1:2016 effects on sensor performance are discussed in IEC 60079-29-2 The volume fraction of each component shall be known to a relative expanded uncertainty of – 36 – IEC 60079-29-1:2016 © IEC 2016 ±2 % of value NOTE the The stated time the equipment is exposed is calculated by dividing the required dose by the actual concentration of hexamethyldisiloxane 5.4.20.2 Poisons (applicable only to Group I equipment with catalytic or 5.4.21 Electromagnetic sensors) semiconductorcompatibility The equipment equipment,shall including the sensor and interconnecting be subjected to the be exposed to a volume fraction of (1,0wiring, The ± 0,05)shall % methane in air mixture tests described in IEC 61326-1:2012 Table containing a volume fraction of (10 ± 1) ppm of hexamethyldisiloxane and shall perform in continuous operation until a dose of (400 ± 20) ppm is reached NOTE Specific applications or local regulations might require more severe electromagnetic immunity test parameters NOTE Certain materials that might be present in industrial atmospheres can lead to "poisoning" or other undesirable effects can result in a change of sensitivityexposed of a gas sensor The test shall bewhich carried out with the equipment to the standard test gas The alarm set point shall be set so that the alarm is active, i.e to the volume fraction of the standard test NOTE materials are are frequently claimed by manufacturers, evidence of the testing As improved improved tolerances tolerancestotothese these materials frequently claimed by manufacturers, evidence of the gas plus or minus the asthese listed in Annex A procedure used to used substantiate these claims and test results can be open verification by agreement testing procedure to variation substantiate claims and test results cantobevalidation open to or validation or verification by between a between purchaser, a manufacturer, and a testing Possible “poisoning” agents andagents their effects on agreement a purchaser, a manufacturer, andlaboratory a testing laboratory Possible "poisoning" and their effects performance on sensor performance are discussed in IEC 60079-29-2 sensor are discussed in EN 60079-29-2 For multi-gas portable equipment, this test shall be performed with a full set of typical sensors NOTE The time the equipment is exposed is calculated by dividing the required dose by the actual concentration of hexamethyldisiloxane For equipment with a measuring range up to 100 % (v/v), this test shall be performed in clean 5.4.21 Electromagnetic compatibility 5.4.21 air only Electromagnetic The alarm set point shall be set to % of the measuring range or the lowest possible compatibility setting, whichever setting is higher The equipment, including the sensor and interconnecting wiring, shall be subjected to the The set up under normal testsequipment described shall in IECbe61326-1:2012 Table 2.conditions, in accordance with 5.3, and then shall be to theintests specified inmanual EN 50270  Anysubjected special advice the instruction concerning EMC shall be followed NOTE Specific applications or local regulations might require more severe electromagnetic immunity test parameters 5.4.22 Field calibration kit The test shall be carried out with exposed to shall the standard test The alarm Calibration initiation methods andthe gasequipment application methods be tested or gas excluded from set point shall be set so that the alarm is active, i.e to the volume fraction of the standard test the scope of the performance test within the instruction manual gas plus or minus the variation as listed in Annex A Field calibration kit(s) shall be verified by comparison of the following: For multi-gas portable equipment, this test shall be performed with a full set of typical sensors a) expose the equipment to clean air and standard test gas using the field calibration kit in Any special advice in the instruction manual concerning EMC shall be followed 5.4.22 Field calibration kit – 39 – BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 Calibration initiation methods and gas application methods shall be tested or excluded from the scope of the performance test within the instruction manual Field calibration kit(s) shall be verified by comparison of the following: a) expose the equipment to clean air and standard test gas using the field calibration kit in accordance with the instruction manual; b) expose the equipment to clean air and standard test gas as it is done in normal operation 5.4.23 Software function 5.4.23 Verification of software and digital components Software controlled equipment shall be validated against the requirements of 4.2.9 Design and function of the equipment using software and/or digital technologies shall be evaluated and tested in accordance with EN 50271  The manufacturer shall provide evidence that the software fully complies with 4.2.9 ±0,1 % methane or ±5 % of indication ±0,1 % methane or ±5 % of indication ±0,1 % methane or ±5 % of indication Response to different gases Stability, short term Stability, long term (fixed/transportable) Stability, long term (portable) Alarm set point(s) Temperature (portable) 5.4.3.3 5.4.4.2 5.4.4.3 and 5.4.4.5 5.4.4.4 and 5.4.4.6 5.4.5 5.4.6 (a) ±0,3 % methane or ±15 % of indication from 20 °C (test: –20 °C, 20 °C, 40 °C) Check alarm/manual reset operation Not applicable ±0,1 % methane or ±5 % of indication Calibration curve 5.4.3.2 None Volume fraction up to % methane in air ±5 % measuring range or ±10 % of indication from 20 °C (test: –20 °C, 20 °C, 40 °C) Check alarm/manual reset operation ±3 % measuring range or ±5 % of indication ±3 % measuring range or ±5 % of indication ±3 % measuring range or ±5 % of indication Not applicable ±3 % measuring range or ±5 % of indication None Volume fraction up to 100 % methane in air Group I equipment limits (whichever value is greater) Unpowered storage Test 5.4.2 Subclause ±10 % measuring range or ±20 % of indication from 20 °C (test: –20 °C, 20 °C, 40 °C) Check alarm/manual reset operation ±10 % measuring range or ±20 % of indication ±15 % measuring range or ±30 % of indication ±3 % measuring range or ±10 % of indication ±7 % measuring range or ±15 % of indication ±5 % measuring range or ±10 % of indication None Volume fraction up to 20 % lower flammable limit ±5 % measuring range or ±10 % of indication from 20 °C (test: –20 °C, 20 °C, 40 °C) Check alarm/manual reset operation ±5 % measuring range or ±10 % of indication ±7 % measuring range or ±20 % of indication ±3 % measuring range or ±10 % of indication ±7 % measuring range or ±15 % of indication ±5 % measuring range or ±10 % of indication None Volume fraction up to 100 % lower flammable limit Group II equipment limits (whichever value is greater) ±5 % measuring range or ±10 % of indication from 20 °C (test: –20 °C, 20 °C, 40 °C) Check alarm/manual reset operation ±5 % measuring range or ±10 % of indication ±7 % measuring range or ±20 % of indication ±3 % measuring range or ±10 % of indication ±7 % measuring range or ±15 % of indication ±5 % measuring range or ±10 % of indication None Volume fraction up to 100 % gas NOTE The specified numbers are the maximum permitted deviations of the indications of the equipment from the reference indications obtained at the start of the test or at reference conditions (e.g at reference temperature 20 °C) Table A.1 – Performance requirements (1 of 6) Performance requirements Annex A (normative) BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 – 40 – – 37 – Test Temperature (non-portable equipment including remote sensors with restricted temperature range) Temperature (all other nonportable equipment including remote sensors) Subclause 5.4.6 (b) 5.4.6 (c) ±0,3 % methane or ±15 % of indication from 20 °C (test: –20 °C, 20 °C, 40 °C) Not applicable Volume fraction up to % methane in air ±5 % measuring range or ±10 % of indication from 20 °C (test: –20 °C, 20 °C, 40 °C) Not applicable Volume fraction up to 100 % methane in air Group I equipment limits (whichever value is greater) ±5 % measuring range or ±15 % of indication from 20 °C (test: °C, 20 °C, 55 °C) Control unit: ±3 % measuring range or ±10 % of indication from 20 °C (test: -20 °C, 20 °C, 55 °C) All other equipment: ±10 % measuring range or ±20 % of indication from 20 °C (test: –20 °C, 20 °C, 55 °C) ±5 % measuring range or ±15 % of indication from 20 °C (test: °C, 20 °C, 55 °C) Control unit: ±3 % measuring range or ±10 % of indication from 20 °C (test: -20 °C, 20 °C, 55 °C) All other equipment: ±10 % measuring range or ±20 % of indication from 20 °C (test: –20 °C, 20 °C, 55 °C) ±10 % measuring range or ±30 % of indication from 20 °C (test: °C, 20 °C, 55 °C) Control unit: ±3 % measuring range or ±10 % of indication from 20 °C (test: -20 °C, 20 °C, 55 °C) All other equipment: ±20 % measuring range or ±40 % of indication from 20 °C (test: –20 °C, 20 °C, 55 °C) All other equipment: All other equipment: All other equipment: Control unit: ±3 % measuring range or ±10 % of indication from 20 °C (test: °C, 20 °C, 55 °C) Volume fraction up to 100 % gas Control unit: ±3 % measuring range or ±10 % of indication from 20 °C (test: °C, 20 °C, 55 °C) Volume fraction up to 100 % lower flammable limit Group II equipment limits (whichever value is greater) Control unit: ±3 % measuring range or ±10 % of indication from 20 °C (test: °C, 20 °C, 55 °C) Volume fraction up to 20 % lower flammable limit Table A.1 (2 of 6) – 41 – – 38 – BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 Pressure Humidity of test gas Air velocity Flow rate 5.4.8 5.4.9 5.4.10 Test 5.4.7 Subclause ±0,1 % methane or ±5 % of indication from that at nominal flow rate ±0,1 % methane or ±5 % of indication ±0,2 % methane or ±15 % of indication from the indication at adjustment at 40 °C (test: 20 %RH, 50 %RH, 90 %RH) ±0,2 % methane or ±30 % of indication from 100 kPa (test: 80 kPa, 100 kPa, 120 kPa) Volume fraction up to % methane in air indication ±3 % measuring range or ±5 % of indication from that at nominal flow rate ±3 % measuring range or ±5 % of indication ±5 % measuring range or ±15 % of indication from the indication at adjustment at 40 °C (test: 20 %RH, 50 %RH, 90 %RH) ±5 % measuring range or ±30 % of indication from 100 kPa (test: 80 kPa, 100 kPa, 120 kPa) Volume fraction up to 100 % methane in air indication Group I equipment limits (whichever value is greater) ±10 % measuring range or ±20 % of indication from that at nominal flow rate ±10 % measuring range or ±20 % of indication ±15 % measuring range or ±30 % of indication from the indication at adjustment at 40 °C (test: 20 %RH, 50 %RH, 90 %RH) ±10 % measuring range or ±30 % of indication from 100 kPa (test: 80 kPa, 100 kPa, 120 kPa) Volume fraction up to 20 % lower flammable limit indication Table A.1 (3 of 6) ±5 % measuring range or ±10 % of indication from that at nominal flow rate ±5 % measuring range or ±10 % of indication ±10 % measuring range or ±30 % of indication from the indication at adjustment at 40 °C (test: 20 %RH, 50 %RH, 90 %RH) ±5 % measuring range or ±30 % of indication from 100 kPa (test: 80 kPa, 100 kPa, 120 kPa) Volume fraction up to 100 % lower flammable limit indication Group II equipment limits (whichever value is greater) ±5 % measuring range or ±10 % of indication from that at nominal flow rate ±5 % measuring range or ±10 % of indication ±10 % measuring range or ±30 % of indication from the indication at adjustment at 40 °C (test: 20 %RH, 50 %RH, 90 %RH) ±5 % measuring range or ±30 % of indication from 100 kPa (test: 80 kPa, 100 kPa, 120 kPa) Volume fraction up to 100 % gas indication BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 – 42 – – 39 – t(90) in less than 30 s t(50) in less than 10 s t(10) in less than 30 s t(90) in less than 30 s t(50) in less than 30 s t(10) in less than 90 s Warm-up time Time of response (increasing concentration) Time of response (decreasing concentration) 5.4.14 5.4.15 ±5 % measuring range within min, and no false alarm ±5 % measuring range within min, and no false alarm ±5 % measuring range within min, and no false alarm ±3 % measuring range within min, and no false alarm Not applicable t(90) in less than 60 s Not applicable t(90) in less than 60 s t(10) in less than 60 s t(50) in less than 20 s t(90) in less than 60 s t(50) in less than 20 s Portable: Portable: Portable: Portable: ±0,1 % methane within min, and no false alarm t(50) in less than 20 s ±5 % measuring range within manual spec., and no false alarm ±5 % measuring range within manual spec., and no false alarm ±5 % measuring range within manual spec., and no false alarm ±3 % measuring range within min, and no false alarm ±0,1 % methane within min, and no false alarm t(50) in less than 20 s Fixed/transportable: Fixed/transportable: Fixed/transportable: Fixed/transportable: Fixed/transportable: Portable: ±5 % measuring range or ±10 % of indication ±5 % measuring range or ±10 % of indication, and no loss of function, no fault signal, no damage resulting in a hazard and no false alarms ±5 % measuring range or ±10 % of indication ±5 % measuring range or ±10 % of indication, and no loss of function, no fault signal, no damage resulting in a hazard and no false alarms ±5 % measuring range or ±10 % of indication Volume fraction up to 100 % gas indication ±10 % measuring range or ±20 % of indication ±10 % measuring range or ±20 % of indication, and no loss of function, no fault signal, no damage resulting in a hazard and no false alarms ±5 % measuring range or ±10 % of indication Volume fraction up to 100 % lower flammable limit indication ±3 % measuring range or ±5 % of indication ±0,1 % methane or ±5 % of indication ±3 % measuring range or ±5 % of indication, and no loss of function, no fault signal, no damage resulting in a hazard and no false alarms ±10 % measuring range or ±20 % of indication Volume fraction up to 20 % lower flammable limit indication Group II equipment limits (whichever value is greater) – 40 – 5.4.15 t(50) in less than 10 s t(50) in less than 10 s Drop test 5.4.13 ±0,1 % methane or ±5 % of indication, and no loss of function, no fault signal, no damage resulting in a hazard and no false alarms Vibration ±3 % measuring range or ±5 % of indication Fixed/transportable: ±5 % measuring range or ±10 % of indication Portable: Volume fraction up to 100 % methane in air indication 5.4.12 ±0,1 % methane or ±5 % of indication Volume fraction up to % methane in air indication Group I equipment limits (whichever value is greater) Orientation Test 5.4.11 Subclause Table A.1 (4 of 6) – 43 – BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 High gas concentration operation above the measuring range Battery capacity Power supply variation Addition of sampling probe 5.4.17 5.4.18 5.4.19 Test 5.4.16 Subclause ±0,1 % methane or ±5 % of indication ±3 % measuring range or ±5 % of indication ±3 % measuring range or ±5 % of indication from that at rated voltage ±5 % measuring range or ±10 % of indication ±5 % measuring range or ±10 % of indication from that at rated voltage ±5 % measuring range or ±10 % of indication ±5 % measuring range or ±10 % of indication from that at rated voltage ±5 % measuring range or ±10 % of indication ±3 % measuring range or ±10 % of indication from that at rated voltage ±6 % measuring range or ±20 % of indication (test: 10 after “low battery” condition) ±7 % measuring range or ±15 % of indication (test: 10 after “low battery” condition) ±10 % measuring range or ±20 % of indication (test: 10 after “low battery” condition) ±6 % measuring range or ±10 % of indication (test: 10 after “low battery” condition) ±0,2 % methane or ±10 % of indication (test: 10 after “low battery” condition) ±0,1 % methane or ±5 % of indication from that at rated voltage ±3 % measuring range or ±10 % of indication (test: h or 10 h, respectively) ±7 % measuring range or +20 % / –10 % of indication ±15 % measuring range or +40 % / –20 % of indication ±5 % measuring range or ±10 % of indication (test: h or 10 h, respectively) or or ±7 % measuring range or ±15 % of indication Volume fraction up to 100 % gas indication ±7 % measuring range or ±15 % of indication (test: h or 10 h, respectively) Fault indication after reset Volume fraction up to 100 % lower flammable limit indication Fault indication after reset Volume fraction up to 20 % lower flammable limit indication ±3 % measuring range or ±5 % of indication (test: h or 10 h, respectively) ±5 % measuring range or ±10 % of indication Volume fraction up to 100 % methane in air indication Group II equipment limits (whichever value is greater) ±0,1 % methane or ±5 % of indication (test: h or 10 h, respectively) ±0,2 % methane or +20 % / –10 % of indication Volume fraction up to % methane in air indication Group I equipment limits (whichever value is greater) Table A.1 (5 of 6) BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 – 44 – – 41 – Poisons Other gases Electromagnetic compatibility Poisons 5.4.20.2 5.4.20.1 5.4.21 5.4.20.2 Field calibration kit Field calibration kit 5.4.22 5.4.22 Electromagnetic compatibility Test Other gases Sub5.4.20.1 clause  5.4.21 Test Subclause ±3 % measuring range or ±5 % of indication ±5 % measuring range or ±10 % of indication Not applicable Criterion A: Variation less than ±10 % measuring range Not applicable All criteria: and no spurious alarms/deactivation of AccordingA:to EN 50270 Criterion alarms less than ±10 % Variation measuring range ±5 % measuring range or All ±10criteria: % of indication and no spurious alarms/deactivation of alarms ±5 % measuring range or ±10 % of indication Not applicable Criterion A: Variation less than ±5 % measuring range Not applicable All criteria: no spurious alarms/deactivation of According Criterion A:to EN 50270 alarms less than ±5 % Variation measuring range ±5 % measuring range or All ±10criteria: % of indication no spurious alarms/deactivation of alarms Volume fraction up to 100 % lower flammable Not applicable limit indication ±5 % measuring range or ±10 % of indication Not applicable Criterion A: Variation less than ±5 % measuring range Not applicable All criteria: no spurious alarms/deactivation of According Criterion A:to EN 50270 alarms less than ±5 % Variation measuring range ±5 % measuring range or All ±10criteria: % of indication no spurious alarms/deactivation of alarms Volume fraction up to 100 % gas indication Not applicable Not applicable Volume fraction up to 20 % lower flammable Not applicable limit indication limit indication Volume fraction up to Volume fraction up to 100 % gas indication 100 % lower flammable limit indication Group II equipment limits Not applicable (whichever value is greater) Not applicable Volume fraction up to (6 of 6) 20 % lower flammable Group II equipment limits (whichever value is greater)  – 42 – ±0,1 % methane or ±5 % of indication Volume fraction up to Volume fraction up to Table A.1 100 % methane in air % methane in air indication indication Group I equipment limits ±10 % of the (whichever actual ±10is%greater) of the actual value methane volume fraction methane volume fraction Volume fraction up to Volume fraction up to applied applied 100 % methane in air % methane in air ±0,2 % methane or ±3 % measuring range or indication indication ±10 % of indication ±10 % of indication ±10 % of the actual ±10 % of the actual Criterion Criterion methane A: volume fraction methane A: volume fraction Variation Variation applied less than applied less than ±3 % measuring range ±0,15 % methane ±0,2 % methane or ±3 % measuring range or All All ±10criteria: % of indication ±10criteria: % of indication no spurious no spurious alarms/deactivation of alarms/deactivation of According to EN 50270 According Criterion A: Criterion A:to EN 50270 alarms less than ±3 % alarms less than Variation Variation measuring range ±0,15 % methane ±0,1 % methane or ±3 % measuring range or All % criteria: All % criteria: ±5 of indication ±5 of indication no spurious no spurious alarms/deactivation of alarms/deactivation of alarms alarms Group I equipment limits (whichever value is greater) Table A.1 (6 of 6) – 45 – BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 BS EN 60079-29-1:2016 BS EN 60079-29-1:2016 – 42 –IEC 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016© IEC 2016 BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 – 46 – – 43 – Annex B (informative) Determination of time of response B.1 B.1.1 Aspirated equipment Test rig Attach the equipment to the test rig as shown schematically in Figure B.1 The test rig consists of two gas lines, one supplying clean air and the other test gas The two flows can be switched between the equipment inlet and the exhaust While one flow is directed to the equipment, the other flow is directed to the exhaust Switching of the two flows should be done simultaneously The gas line connecting the test rig to the equipment should have an outlet for excess gas The volume of the gas line connecting the test rig to the equipment should be kept to a minimum B.1.2 Equipment without internal pump The outlet for excess gas should be closed The flow rates of the two gas lines should be set to the minimum flow rate specified in the instruction manual The measurement of the time of response should start with the switching from clean air to test gas Where appropriate, a correction should be made to the time of response for the switching time between the two gas lines and for the time needed to purge the dead volume between the outlet of the switching device and the equipment inlet B.1.3 Equipment with internal pump The outlet for excess gas should be opened The gas inlet to the equipment should be appropriately restricted so that the flow rate to the equipment is 10 % above the flow rate at which the flow failure signal is activated The flow rates of the two gas lines should be set appropriately The excess flow rate at the outlet should be sufficiently high so that reverse flow cannot occur This will usually be achieved by an excess flow rate of approximately 20 % The measurement of the time of response should start with the switching from clean air to test gas Where appropriate, a correction should be made to the time of response for the switching time between the two gas lines and for the time needed to purge the dead volume between the outlet of the switching device and the equipment inlet – 47 – – 44 – BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 Exhaust Clean air Test gas Outlet of switching device Gas inlet Gas detection equipment Excess gas outlet IEC Figure B.1 – Schematic example of test rig for use with aspirated equipment B.2 B.2.1 Equipment that samples by diffusion Calibration mask method This method should only be used for measuring response times of "other gases" (5.3.2) in order to compare the response times of different gases The test rig described in B.1.1 should be used The test should be performed as for equipment without an internal pump (see B.1.2) The flow rate through the mask should be set to the minimum flow rate specified in the instruction manual If only a nominal flow rate is given, this nominal flow rate should be used B.2.2 Diffusion or flow methods The diffusion and/or flow method should be used for measuring the time of response of the equipment for the standard test gases according to 5.4.15 A suitable method should be used which has been validated immersion or containment) or flow methods Examples are diffusion (by BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 – 48 – Bibliography IEC 60050, International Electrotechnical Vocabulary (IEV) IEC 60529, Degrees of protection provided by enclosures (IP Code) NOTE Harmonized as EN 60529. IEC 60079-1, Explosive atmospheres – Part 1: Equipment protection by flameproof enclosures “d” NOTE Harmonized as EN 60079-1. IEC 60079-2, Explosive atmospheres – Part 2: Equipment protection by pressurized enclosure “p” NOTE Harmonized as EN 60079-2. IEC 60079-5, Explosive atmospheres – Part 5: Equipment protection by powder filling “q” NOTE Harmonized as EN 60079-5. IEC 60079-6, Explosive atmospheres – Part 6: Equipment protection by liquid immersion “o” NOTE Harmonized as EN 60079-6. IEC 60079-7, Explosive atmospheres – Part 7: Equipment protection by increased safety “e” NOTE Harmonized as EN 60079-7. IEC 60079-10-1, Explosive atmospheres – Part 10-1: Classification of areas – Explosive gas atmospheres NOTE Harmonized as EN 60079-10-1. IEC 60079-11, Explosive atmospheres – Part 11: Equipment protection by intrinsic safety “i” NOTE Harmonized as EN 60079-11. IEC 60079-15, Explosive atmospheres – Part 15: Equipment protection by type of protection “n” NOTE Harmonized as EN 60079-15. IEC 60079-18, Explosive atmospheres – Part 18: Equipment protection by encapsulation “m” NOTE Harmonized as EN 60079-18. IEC 60079-25, Explosive atmospheres – Part 25: Intrinsically safe electrical systems NOTE Harmonized as EN 60079-25. IEC 60079-26, Explosive atmospheres – Part 26: Equipment with equipment protection level (EPL) Ga NOTE Harmonized as EN 60079-26. IEC 60079-29-2, Explosive atmospheres – Part 29-2: Gas detectors – Selection, installation, use and maintenance of detectors for flammable gases and oxygen NOTE Harmonized as EN 60079-29-2. – 49 – BS EN 60079-29-1:2016 IEC 60079-29-1:2016 © IEC 2016 IEC 60079-29-3, Explosive atmospheres – Part 29-3: Gas detectors – Guidance on functional safety of fixed gas detection systems NOTE Harmonized as EN 60079-29-3. IEC 60079-29-4, Explosive atmospheres – Part 29-4: Gas detectors – Performance requirements of open path detectors for flammable gases NOTE Harmonized as EN 60079-29-4. ISO 6142, Gas analysis – Preparation of calibration gas mixtures – Gravimetric method NOTE Harmonized as EN ISO 6142 2)  ISO 6145-1, Gas analysis – Preparation of calibration gas mixtures using dynamic volumetric methods – Part 1: Methods of calibration NOTE Harmonized as EN ISO 6145-1. ISO 6145-2, Gas analysis – Preparation of calibration gas mixtures using dynamic volumetric methods – Part 2: Volumetric pumps ISO 6145-4, Gas analysis – Preparation of calibration gas mixtures using dynamic volumetric methods – Part 4: Continuous syringe injection method NOTE Harmonized as EN ISO 6145-4. ISO 6145-5, Gas analysis – Preparation of calibration gas mixtures using dynamic volumetric methods – Part 5: Capillary calibration devices NOTE Harmonized as EN ISO 6145-5. ISO 6145-6, Gas analysis – Preparation of calibration gas mixtures using dynamic volumetric methods – Part 6: Critical orifices NOTE Harmonized as EN ISO 6145-6. ISO 6145-7, Gas analysis – Preparation of calibration gas mixtures using dynamic volumetric methods – Part 7: Thermal mass-flow controllers NOTE Harmonized as EN ISO 6145-7. ISO 6145-9, Gas analysis – Preparation of calibration gas mixtures using dynamic volumetric methods – Part 9: Saturation method NOTE Harmonized as EN ISO 6145-9. ISO 6145-10, Gas analysis – Preparation of calibration gas mixtures using dynamic volumetric methods – Part 10: Permeation method NOTE Harmonized as EN ISO 6145-10.  2) Superseded by EN ISO 6142-1 (ISO 6142-1)  This page deliberately left blank This page deliberately left blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution (BSI) BSI is the national body responsible for preparing British Standards and other standards-related publications, information 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