1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen - Requirements and tests for apparatus using software and/or digital technologiesBS EN 50271:2018EUROPEAN STANDARD NORME
2、 EUROPENNE EUROPISCHE NORM EN 50271 June 2018 ICS 13.320 Supersedes EN 50271:2010 English Version 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 Appareils lectriques
3、de dtection et de mesure des gaz combustibles, des gaz toxiques ou de loxygne - Exigences et essais pour les appareils utilisant un logiciel et/ou des technologies numriques Elektrische Gerte fr die Detektion und Messung von brennbaren Gasen, giftigen Gasen oder Sauerstoff - Anforderungen und Prfung
4、en fr Warngerte, die Software und/oder Digitaltechnik nutzen This European Standard was approved by CENELEC on 2017-11-06. 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
5、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 an
6、y 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,
7、 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
8、Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CENELEC All rights of exploitation in any
9、form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 50271:2018 E National forewordThis British Standard is the UK implementation of EN 50271:2018. It supersedes BS EN 50271:2010, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee EXL
10、/31/1, 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. The British Standards Institution 2018 Pu
11、blished by BSI Standards Limited 2018ISBN 978 0 580 91960 2ICS 71.040.40; 29.260.20; 13.320Compliance 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 30 June 2018.Amendment
12、s/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 50271:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50271 June 2018 ICS 13.320 Supersedes EN 50271:2010 English Version Electrical apparatus for the detection and measurement of combustible gases, toxic gases or
13、oxygen - Requirements and tests for apparatus using software and/or digital technologies Appareils lectriques de dtection et de mesure des gaz combustibles, des gaz toxiques ou de loxygne - Exigences et essais pour les appareils utilisant un logiciel et/ou des technologies numriques Elektrische Gert
14、e fr die Detektion und Messung von brennbaren Gasen, giftigen Gasen oder Sauerstoff - Anforderungen und Prfungen fr Warngerte, die Software und/oder Digitaltechnik nutzen This European Standard was approved by CENELEC on 2017-11-06. CENELEC members are bound to comply with the CEN/CENELEC Internal R
15、egulations 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 CENEL
16、EC 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
17、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
18、, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CE
19、NELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 50271:2018 E BS EN 50271:2018EN 50271:2018 (E) 2 Contents European foreword . 3 Introduction . 4 1 Scope . 5 2 Norma
20、tive references . 5 3 Terms and definitions 6 4 Design principles 8 4.1 Basic requirements . 8 4.1.1 General . 8 4.1.2 Analogue/digital interface . 8 4.1.3 Numerical errors . 8 4.1.4 Measuring operation . 8 4.1.5 Special state indication . 8 4.2 Displays 9 4.2.1 General . 9 4.2.2 Indication of messa
21、ges . 9 4.2.3 Indication of measured values 10 4.3 Software10 4.3.1 General . 10 4.3.2 Re-used or commercial operating systems 11 4.3.3 Software requirements 11 4.3.4 Requirements for software documentation . 12 4.3.5 Requirements for the software development process 12 4.4 Hardware 20 4.5 Digital d
22、ata transmission between components of apparatus 20 4.6 Test routines .20 4.7 Instruction manual 22 4.8 Additional requirements for compliance with SIL 1 23 5 Test of the digital unit 24 5.1 General .24 5.2 Verification of functional concept 25 5.3 Performance test 25 Annex A (normative) Hardware-so
23、ftware integration test .27 A.1 Functional testing/Black-box testing 27 A.2 Equivalence class test with boundary value analysis 27 Annex ZY (normative) Significant changes between this European Standard and EN 50271:2010 .29 Annex ZZ (informative) Relationship between this European standard and the
24、essential requirements of Directive 2014/34/EU aimed to be covered 31 Bibliography 32 BS EN 50271:2018EN 50271:2018 (E) 3 European foreword This document (EN 50271:2018) has been prepared by CLC/SC 31-9, “Electrical apparatus for the detection and measurement of combustible gases to be used in indus
25、trial and commercial potentially explosive atmospheres”, of CLC/TC 31, “Electrical apparatus for potentially explosive atmospheres”, and by CLC/TC 216 “Gas detectors”. The following dates are fixed: latest date by which this document has to be implemented at national level by publication of an ident
26、ical national standard or by endorsement (dop) 2018-12-15 latest date by which the national standards conflicting with this document have to be withdrawn (dow) 2021-06-15 This document supersedes EN 50271:2010. The State of the Art is included in Annex ZY “Significant changes between this European S
27、tandard and EN 50271:2010” which lists all changes to EN 50271:2010. This document has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association and covers essential requirements of EU Directive 2014/34/EU. For the relationship with EU Directiv
28、e see informative Annex ZZ, which is an integral part of this document. BS EN 50271:2018EN 50271:2018 (E) 4 Introduction This European Standard specifies minimum requirements for functional safety of gas detection apparatus using software and/or digital technologies and defines criteria for reliabil
29、ity and avoidance of faults. Functional safety is that part of the overall safety which is related to the measures within the gas detection apparatus to avoid or to handle failures in such a manner that the safety function will be ensured. Gas detection apparatus will fail to function if dangerous f
30、ailures occur. The aim of this European Standard is to reduce the risk of dangerous equipment failures to levels appropriate to typical applications of such apparatus. Failure to function will also occur if such apparatus are not selected, installed or maintained in an appropriate manner. In some ap
31、plications failures of this type will dominate the functional safety achieved. Users of gas detection apparatus will therefore need to ensure that selection, installation and maintenance of such apparatus are carried out appropriately. Guidance for the selection, installation, use and maintenance of
32、 gas detection apparatus are set out in EN 60079-29-2 and EN 45544-4, respectively. This European Standard does not include requirements for operational availability which will need to be considered separately. Regarding the requirements for the software development process, this European Standard s
33、pecifies a practical approach to comply with the requirements of EN 61508-3 for SIL 1 without using this generic standard. This European standard also specifies additional optional requirements for compliance with SIL 1 in low demand mode operation. The following apparatus or gas detection systems a
34、re not fully covered by this standard: apparatus at SIL 1 when the apparatus or gas detection system contains functionality not covered by EN 50271 apparatus at SIL 1 high demand mode operation apparatus at SIL 2 and SIL 3; For such apparatus or gas detection systems the European standard EN 50402 s
35、hould be used instead of EN 50271. EN 50402 includes all requirements of EN 50271. BS EN 50271:2018EN 50271:2018 (E) 5 1 Scope This European Standard specifies minimum requirements and tests for electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen using
36、software and/or digital technologies. This European Standard is applicable to fixed, transportable and portable apparatus intended for use in domestic premises as well as commercial and industrial applications and their software-controlled safety related accessories. This European Standard does not
37、apply to external sampling systems which are not accessories, or to apparatus of laboratory or scientific type, or to apparatus used only for process control purposes. This European Standard supplements the requirements of the European Standards for the detection and measurement of flammable gases a
38、nd vapours (e.g. EN 60079-29-1, EN 60079-29-4, EN 50194-1, EN 50194-2), toxic gases (e.g. EN 45544 series, EN 50291-1, EN 50291-2) or oxygen (e.g. EN 50104). NOTE 1 These European Standards will be mentioned in this European Standard as “metrological standards”. NOTE 2 The examples above show the st
39、ate of the standardization for gas detection apparatus at the time of publishing this European Standard. There may be other metrological standards for which this European Standard is also applicable. This European Standard is a product standard which is based on the EN 61508 series. It covers part o
40、f the phase 10 “realisation” of the overall safety life cycle defined in EN 61508-1. Additional requirements are specified if compliance with safety integrity level 1 (SIL 1) according to the EN 61508 series is claimed for fixed or transportable apparatus for low demand mode of operation. They can a
41、lso be applied to portable apparatus which are able to perform an automatic executive action. It is recommended to apply this European Standard for apparatus used for safety applications with SIL-requirement 1 instead of EN 50402. However, the technical requirements of EN 50271 and EN 50402 are the
42、same for SIL 1. NOTE 3 For apparatus used for safety applications with SIL-requirements higher than 1 EN 50402 is applicable. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated referenc
43、es, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 50402:2017, Electrical apparatus for the detection and measurement of combustible or toxic gases or vapours or of oxygen - Requirements on the functional s
44、afety of gas detection systems EN 60079-29-1:2016, Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of detectors for flammable gases EN 61508-1:2010, Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 1: General requirements EN
45、 61508-2:2010, Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 2: Requirements for electrical/electronic/programmable electronic safety-related systems EN 61508-3:2010, Functional safety of electrical/electronic/programmable electronic safety-related
46、systems - Part 3: Software requirements EN 61508-4:2010, Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 4: Definitions and abbreviations BS EN 50271:2018EN 50271:2018 (E) 6 EN 61508-5:2010, Functional safety of electrical/electronic/programmable elec
47、tronic safety-related systems - Part 5: Examples of methods for the determination of safety integrity levels EN 61508-6:2010, Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 6: Guidelines on the application of IEC 61508-2 and IEC 61508-3 EN 61508-7:20
48、10, Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 7: Overview of techniques and measures 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 60079-29-1:2016 and the following apply. 3.1 digital unit part
49、of an electrical apparatus in which data is processed digitally. Analogue-digital(A/D)-converters and digital-analogue(D/A)-converters as interfaces to analogue units of the apparatus belong to the digital unit 3.2 special state all states of the apparatus other than those in which monitoring of gas concentration and/or alarming is intended, for example the special states of warm-up, calibration mode or fault condition SOURCE: EN 60079-29-1:2016, 3.5.4 3.3 software intellectual creation comprising the programs, procedures, rules and as
