1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationExplosive atmospheresPart 29-4: Gas detectors Performance requirements of open path detectors for flammable gasesBS EN 60079-29-4:2010Incorporating corrigendum August 2010Nationa
2、l forewordThis British Standard is the UK implementation of EN 60079-29-4:2010. It is identical to IEC 60079-29-4:2009, incorporating corrigendum August 2010. BS EN 50241-2:1999, which are withdrawn.The UK participation in its preparation was entrusted by Technical Committee GEL/31, Equipment for ex
3、plosive atmospheres, to Subcommittee GEL/31/19, Gas detectors.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.
4、BSI 2011 ISBN 978 0 580 72991 1 ICS 13.320; 29.260.20Compliance 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 July 2010.BRITISH STANDARDBS EN 60079-29-4:2010It superse
5、des BS EN 50241-1:1999 and The CENELEC common modifications have been implemented at the appro-priate places in the text. The start and finish of each common modification. is indicated in the text by tags Amendments/corrigenda issued since publicationDate Text affected31 July 2011 Implementation of
6、IEC corrigendummodification to clause 5.2.4.3. August 2010:EUROPEAN STANDARD EN 60079-29-4 NORME EUROPENNE EUROPISCHE NORM April 2010 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Centr
7、al Secretariat: Avenue Marnix 17, B - 1000 Brussels 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60079-29-4:2010 E ICS 29.260.20 Supersedes EN 50241-1:1999 + A1:2004, EN 50241-2:1999English version Explosive atmospheres -
8、Part 29-4: Gas detectors - Performance requirements of open path detectors for flammable gases (IEC 60079-29-4:2009) Atmosphres explosives - Partie 29-4: Dtecteurs de gaz - Exigences daptitude la fonction des dtecteurs de gaz inflammables chemin ouvert (CEI 60079-29-4:2009) Explosionsfhige Atmosphre
9、 - Teil 29-4: Gasmessgerte - Anforderungen an das Betriebsverhalten von Gerten mit offener Messstrecke fr die Messung brennbarer Gase (IEC 60079-29-4:2009) This European Standard was approved by CENELEC on 2010-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations whic
10、h 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 Central Secretariat or to any CENELEC member. This European
11、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 Central Secretariat has the same status as the official versions. CENELEC members are the n
12、ational electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
13、Spain, Sweden, Switzerland and the United Kingdom. Foreword The text of document 31/819/FDIS, future edition 1 of IEC 60079-29-4, prepared by IEC Technical Committee 31, Equipment for explosive atmospheres, was submitted to the IEC-CENELEC parallel vote. A draft amendment, prepared by the CENELEC SC
14、 31-9, Electrical apparatus for the detection and measurement of combustible gases to be used in industrial and commercial potentially explosive atmospheres, of Technical Committee CENELEC TC 31, Electrical apparatus for potentially explosive atmospheres, was submitted to the formal vote. The combin
15、ed texts were approved by CENELEC as EN 60079-29-4 on 2010-04-01. EN 60079-29-4:2010 supplements and modifies the general requirements of EN 60079-0. Where a requirement of this standard conflicts with a requirement of EN 60079-0, the requirement of this standard shall take precedence. This European
16、 Standard supersedes EN 50241-1:1999 + A1:2004 and EN 50241-2:1999. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. The following dates w
17、ere fixed: latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2011-01-01 latest date by which the national standards conflicting with the amendment have to be withdrawn (dow) 2013-04-01 Annexes ZA, ZZ an
18、d ZY have been added by CENELEC. _ 2 BS EN 60079-29-4:2010EN 60079-29-4:2010 (E)Endorsement notice The text of the International Standard IEC 60079-29-4:2009 was approved by CENELEC as a European Standard with agreed common modifications as given below. In the official version, for Bibliography, the
19、 following notes have to be added for the standards indicated: ISO 6142 NOTE Harmonized as EN ISO 6142 ISO 6144 NOTE Harmonized as EN ISO 6144 ISO 6145 NOTE Harmonized as EN ISO 6145 _ 3 BS EN 60079-29-4:2010EN 60079-29-4:2010 (E)Annex ZA (normative) Normative references to international publication
20、s with their corresponding European publications The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
21、NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year - - Electromagnetic compatibility - Electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen E
22、N 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 60079 Series Explosive atmospheres EN 60079 Series IEC 60079-0 - Explosive atmospheres - P
23、art 0: Equipment - General requirements EN 60079-0 - IEC 60079-29-1 (mod) - Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of detectors for flammable gases EN 60079-29-1 - IEC 60825-1 - Safety of laser products - Part 1: Equipment classification and requirements EN 60825
24、-1 - 4 BS EN 60079-29-4:2010EN 60079-29-4:2010 (E)Annex ZY (informative) Significant changes between this European Standard and EN 50241-1:1999 and EN 50241-2:1999 This European Standard supersedes EN 50241-1:1999 and EN 50241-2:1999. The significant changes with respect to EN 50241-1:1999 and EN 50
25、241-2:1999 are as listed below. Type Minor and editorial changes Extension Substantial change regarding ESRs aNormative references: EN 60068-2-6 (vibration), removed, EN 50271 (software) added X Definitions: 3 modified, 3 added, 2 removed X General requirements 4.1 and 4.1.1 modified, 4.1.5 replaced
26、 by 4.3 (Software-controlled equipment, new), 4.2.2.4 (low battery indications) replaced within 4.2.4 (Fault signals, new) X General requirements and normal conditions for tests modified and extended (clauses 5.1, 5.2.4.1, 5.2.4.2, 5.3.2, 5.3.3, 5.3.7, 5.3.8, 5.3.11, 5.3.12) X Test method 5.4.2 (Unp
27、owered storage) modified X Test method 5.4.3 (Calibration curve) modified X X Test method 5.4.4.1, Short term drift test removed, replaced with Slow increase of gas volume ratio for equipment with automatic drift compensation X X Test method 5.4.4.2 (Long term stability) modified X Test method 5.4.4
28、.3, Long term stability (continuous duty, battery powered) test added X X Test method 5.4.4.4, Stability (spot reading equipment only) test added X X Test method 5.4.6 (Temperature variation) modified X Requirements for test 5.4.6 modified X Test method 5.4.7 removed (Pressure variation) X Test meth
29、od 5.4.7 (Water vapour interference) modified X Requirements for test 5.4.7 modified X Test method 5.4.8 (Vibration) modified X Requirements for test 5.4.8 modified X Test method 5.4.9, Drop test for portable and transportable equipment added X X 5 BS EN 60079-29-4:2010EN 60079-29-4:2010 (E)Type Min
30、or and editorial changes Extension Substantial change regarding ESRs aTest method 5.4.12, Minimum time to operate (spot reading equipment) test added X X Test method 5.4.13 removed (Power supply interruptions etc, now part of EMC requirement of EN 50270) X Test method 5.4.13, Battery capacity test a
31、dded X X Test method 5.4.14 (Power supply variations) modified X Test method 5.4.16 removed (Attenuation of radiation, now part of 5.4.20, Long range operation) X Requirements for test 5.4.16 (now Recovery from power supply interruption) modified X Test method 5.4.19, Partial obscuration test added
32、X X Requirements for test 5.4.20 (Long range operation) modified X Labelling and marking requirements modified X Annex A removed (atmospheric visibility) X New Annex A added (water vapour test apparatus) X Bibliography much reduced X The requirements of EN 50241-2 have been incorporated into the tes
33、t methods of the new standard, thus combining the two previous standards into one X aESR = Essential Health and Safety Requirements (Annex II of Directive 94/9/EC) General conclusion on the change of the State of the Art by this standard CENELEC/TC 31 as the responsible committee has concluded that
34、this new edition contains substantial changes regarding the ESRs. 6 BS EN 60079-29-4:2010EN 60079-29-4:2010 (E)Annex ZZ (informative) Coverage of Essential Requirements of EC Directives This European Standard has been prepared under a mandate given to CENELEC by the European Commission and the Europ
35、ean free Trade Association and within its scope the Standard covers only the following essential requirements given in Annex II, Clauses 1.5.5 to 1.5.8 of the EC Directive 94/9/EC: ER 1.5.5 to 1.5.7 the essential safety requirements for devices with a measuring function for explosion protection 1.5.
36、5 is covered by 5.4 of this standard 1.5.6 is covered by 4.2.1, 4.2.2, and 4.2.4 1.5.7 is covered by 4.2.3 and 5.4 ER 1.5.8 the risks arising from software 1.5.8 is covered by 4.3 Compliance with this standard provides one means of conformity with the specified essential requirements of the Directiv
37、e concerned. WARNING: Other requirements and other EC Directives can be applied to the products falling within the scope of this standard. 7 BS EN 60079-29-4:2010EN 60079-29-4:2010 (E)CONTENTS 1 Scope. 2 Normative references . 3 Terms and definitions . 3.1 Equipment.3.2 Alarms. 3.3 Signals and indic
38、ations 3.4 Gaseous atmospheres. 3.5 Optical equipment . 3.6 Performance characteristics 14 4 General requirements.15 4.1 Detection equipment .15 4.1.1 Components 15 4.1.2 Electrical assemblies and components 15 4.1.3 Optical radiation 15 4.2 Construction15 4.2.1 General .15 4.2.2 Indicating devices1
39、5 4.2.3 Alarm or output functions.16 4.2.4 Fault signals16 4.2.5 Adjustments 16 4.3 Software-controlled equipment 17 5 Test requirements 17 5.1 Introduction .17 5.2 General requirements for tests 18 5.2.1 Samples and sequence of tests .18 5.2.2 Constructional checks .18 5.2.3 Preparation of samples1
40、8 5.2.4 Equipment for calibration and test .19 5.3 Normal conditions for test 5.3.1 General . 5.3.2 Operating distance for laboratory tests 5.3.3 Test gases. 5.3.4 Test gas integral concentrations 5.3.5 Voltage 5.3.6 Ambient temperature . 5.3.7 Ambient humidity. 5.3.8 Ambient atmosphere 5.3.9 Prepar
41、ation of equipment 5.3.10 Stabilization. 5.3.11 Communications options23 8 BS EN 60079-29-4:2010EN 60079-29-4:2010 (E)10111111121212135.3.12 Gas detection equipment as part of systems23 21212121212222222222225.4 Test methods 23 5.4.1 Initial preparation and procedure .23 5.4.2 Unpowered storage .23
42、5.4.3 Calibration curve (not applicable to alarm only equipment with fixed settings) 23 5.4.4 Stability .24 5.4.5 Alarm reliability24 5.4.6 Temperature variation .25 5.4.7 Water vapour interference .26 5.4.8 Vibration26 5.4.9 Drop test for portable and transportable equipment .27 5.4.10 Alignment 27
43、 5.4.11 Time of response.28 5.4.12 Minimum time to operate (spot-reading equipment) .28 5.4.13 Battery capacity.28 5.4.14 Power supply variations (externally powered equipment) .29 5.4.15 Power supply interruptions and transients . 5.4.16 Recovery from power supply interruption . 5.4.17 Electromagne
44、tic compatibility (EMC) . 5.4.18 Beam block fault 5.4.19 Partial obscuration. 5.4.20 Long range operation 5.4.21 Direct solar radiation (applicable for equipment intended for outdoor use). 6 Field verification equipment 7 Information for use .33 7.1 Labelling and marking .33 7.2 Instruction manual.3
45、3 Annex A (informative) Water vapour test apparatus .35 Bibliography36 Figure 1 Equipment for gas calibration and speed of response test Figure A.1 Water vapour test apparatus.3 9 BS EN 60079-29-4:2010EN 60079-29-4:2010 (E)3030303031313232205EXPLOSIVE ATMOSPHERES Part 29-4: Gas detectors Performance
46、 requirements of open path detectors for flammable gases 1 Scope This part of EN 60079-29 specifies performance requirements of equipment for the detection and measuring of flammable gases or vapours in ambient air by measuring the spectral absorption by the gases or vapours over extended optical pa
47、ths, ranging typically from one metre to a few kilometres. Such equipment measures the integral concentration of the absorbing gas over the optical path in units such as LFL metre for flammable gases. NOTE 1 Actual values of concentration can be deduced only where it can be established that the conc
48、entration is uniform over the optical path, for example in very short optical paths (100 mm). In such cases, the equipment is within the scope of EN 60079-29-1 . NOTE 2 This standard is based upon present absorption techniques using infrared radiation. Other techniques and applications may require a
49、dditional test considerations (e.g. pressure test). Equipment falling within the scope of this standard is classified by the following types: Type 1: an optical transmitter and receiver, located at either end of a path through the atmosphere to be monitored. Type 2: an optical transceiver (i.e. combined transmitter and receiver) and a suitable reflector, which may be a topographic feature or a retroreflector, located at either end of a path thro
