1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 50271:2010Electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen Requirements and tests for apparatus using software and/or digi
2、tal technologiesBS EN 50271:2010 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 50271:2010. It supersedes BS EN 50271:2002, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee GEL/31/19, Gas detectors.A list of organi
3、zations 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. BSI 2011 ISBN 978 0 580 69466 0 ICS 13.320; 29.260.20; 71.040.40 Compliance wi
4、th 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 April 2011.Amendments issued since publicationDate Text affectedBS EN 50271:2010EUROPEAN STANDARD EN 50271 NORME EUROPENNE
5、EUROPISCHE NORM June 2010 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2010 CENELEC - All rights of exploitation in any form and
6、by any means reserved worldwide for CENELEC members. Ref. No. EN 50271:2010 E ICS 13.320 Supersedes EN 50271:2001English 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 tec
7、hnologies 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 Gerte fr die Detektion und Messung von brennbaren Gasen, giftigen Gasen oder Sauers
8、toff - Anforderungen und Prfungen fr Warngerte, die Software und/oder Digitaltechnik nutzen This European Standard was approved by CENELEC on 2010-06-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the
9、 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 Standard exists in three official versions (English, French, Ger
10、man). 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 national electrotechnical committees of Austria, Belgium, Bulgari
11、a, 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, Spain, Sweden, Switzerland and the United Kingdom. BS EN 50271:2
12、010EN 50271:2010 - 2 - Foreword This European Standard 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 Technical Committee CENELEC TC 31, Electrical apparatus for potent
13、ially explosive atmospheres. It was submitted to the formal vote and approved by CENELEC as EN 50271 on 2010-06-01. This document supersedes EN 50271:2001. 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
14、be held responsible for identifying any or all such patent rights. The State of the Art is included in Annex ZY “Significant changes between this European Standard and EN 50271:2001”. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication o
15、f an identical national standard or by endorsement (dop) 2011-06-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2013-06-01 This European Standard has been prepared under a mandate given to CENELEC by the European Commission and the European Free Tra
16、de Association and covers essential requirements of EC Directive 94/9/EC. See Annex ZZ. _ BS EN 50271:2010- 3 - EN 50271:2010 Contents Introduction - 4 - 1 Scope - 5 - 2 Normative references - 5 - 3 Terms and definitions . - 7 - 4 Design principles . - 8 - 4.1 Basic requirements - 8 - 4.2 Displays .
17、 - 10 - 4.3 Software. - 10 - 4.4 Hardware . - 19 - 4.5 Digital data transmission between components of apparatus . - 19 - 4.6 Test routines - 20 - 4.7 Instruction manual . - 21 - 4.8 Additional requirements for compliance with SIL 1 . - 22 - 5 Test of the digital unit . - 22 - 5.1 General - 22 - 5.2
18、 Verification of functional concept . - 23 - 5.3 Performance test . - 23 - Annex A (normative) Hardware-software integration test . - 25 - A.1 Functional testing/Black-box testing - 25 - A.2 Equivalence class test with boundary value analysis - 25 - Annex ZY (informative) Significant changes between
19、 this European Standard and EN 50271:2001 - 27 - Annex ZZ (informative) Coverage of Essential Requirements of EC Directives . - 28 - Figure Figure 1 Model of the software development process . - 12 - BS EN 50271:2010EN 50271:2010 - 4 - Introduction This European Standard specifies minimum requiremen
20、ts for functional safety of gas detection apparatus using software and/or digital technologies and defines criteria for reliability 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
21、failures in such a manner that the safety function will be assured. Gas detection apparatus will fail to function if dangerous failures 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. Fail
22、ure to function will also occur if such apparatus are not selected, installed or maintained in an appropriate manner. In some applications failures of this type will dominate the functional safety achieved. Users of gas detection apparatus will therefore need to ensure that selection, installation a
23、nd maintenance of such apparatus are carried out appropriately. Guidance for the selection, installation, use and maintenance of 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
24、will need to be considered separately. Regarding the requirements for the software development process, this European Standard specifies a practical approach to comply with the requirements of EN 61508-3 for SIL 1 without using this generic standard. It is recommended to apply this European Standard
25、 for apparatus used for safety applications with SIL-requirement 1 instead of EN 50402 because EN 50402 is designed for the assessment of more complex gas detection systems with SIL-requirements greater than 1. However, the technical requirements of EN 50271 and EN 50402 are the same for SIL 1. BS E
26、N 50271:2010- 5 - EN 50271:2010 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 software and/or digital technologies. Additional requirements are specified if complian
27、ce with safety integrity level 1 (SIL 1) according to EN 61508 series is required for low demand mode of operation. NOTE 1 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 E
28、N 50271 and EN 50402 are the same for SIL 1. NOTE 2 For fixed apparatus used for safety applications with SIL-requirements higher than 1 EN 50402 is applicable. This European Standard is applicable to fixed, transportable and portable apparatus intended for use in domestic premises as well as commer
29、cial and industrial applications. This European Standard does not apply to external sampling systems, 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 detect
30、ion and measurement of flammable gases and vapours (e.g. EN 60079-29-1, EN 50241-1, EN 50241-2, 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 3 These European Standards will be mentioned in this European Standard as “metrological
31、standards“. NOTE 4 The examples above show the state of the standardisation 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
32、is based on EN 61508 series. It covers part of the phase 9 “realisation“ of the overall safety life cycle defined in EN 61508-1. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For
33、 undated references, the latest edition of the referenced document (including any amendments) applies. EN 45544-1 Workplace atmospheres Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours Part 1: General requirements and test methods EN
34、45544-2 Workplace atmospheres Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours Part 2: Performance requirements for apparatus used for measuring concentrations in the region of limit values EN 45544-3 Workplace atmospheres Electrical
35、apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours Part 3: Performance requirements for apparatus used for measuring concentrations well above limit values EN 45544-4 Workplace atmospheres Electrical apparatus used for the direct detection and dir
36、ect concentration measurement of toxic gases and vapours Part 4: Guide for selection, installation, use and maintenance EN 50104 Electrical apparatus for the detection and measurement of oxygen Performance requirements and test methods BS EN 50271:2010EN 50271:2010 - 6 - EN 50194-1 Electrical appara
37、tus for the detection of combustible gases in domestic premises Part 1: Test methods and performance requirements EN 50194-2 Electrical apparatus for the detection of combustible gases in domestic premises Part 2: Electrical apparatus for continuous operation in a fixed installation in recreational
38、vehicles and similar premises Additional test methods and performance requirements EN 50241-1 Specification for open path apparatus for the detection of combustible or toxic gases and vapours Part 1: General requirements and test methods EN 50241-2 Specification for open path apparatus for the detec
39、tion of combustible or toxic gases and vapours Part 2: Performance requirements for apparatus for the detection of combustible gases EN 50291-1 Electrical apparatus for the detection of carbon monoxide in domestic premises Part 1: Test methods and performance requirements EN 50291-2 Electrical appar
40、atus for the detection of carbon monoxide in domestic premises Part 2: Electrical apparatus for continuous operation in a fixed installation in recreational vehicles and similar premises including recreational craft Additional test methods and performance requirements EN 50402:2005 + A1:2008 Electri
41、cal apparatus for the detection and measurement of combustible or toxic gases or vapours or of oxygen Requirements on the functional safety of fixed gas detection systems EN 60079-29-1:2007 Explosive atmospheres Part 29-1: Gas detectors Performance requirements of detectors for flammable gases (IEC
42、60079-29-1:2007, mod.) EN 60079-29-2 Explosive atmospheres Part 29-2: Gas detectors Selection, installation, use and maintenance of detectors for flammable gases and oxygen (IEC 60079-29-2) EN 61508-1:2001 Functional safety of electrical/electronic/programmable electronic safety-related systems Part
43、 1: General requirements (IEC 61508-1:1998 + corr. May 1999) EN 61508-2:2001 Functional safety of electrical/electronic/programmable electronic safety-related systems Part 2: Requirements for electrical/electronic/programmable electronic safety-related systems (IEC 61508-2:2000) EN 61508-3:2001 Func
44、tional safety of electrical/electronic/programmable electronic safety-related systems Part 3: Software requirements (IEC 61508-3:1998 + corr. Apr. 1999) EN 61508-4:2001 Functional safety of electrical/electronic/programmable electronic safety-related systems Part 4: Definitions and abbreviations (IE
45、C 61508-4:1998 + corr. Apr. 1999) EN 61508-5:2001 Functional safety of electrical/electronic/programmable electronic safety-related systems Part 5: Examples of methods for the determination of safety integrity levels (IEC 61508-5:1998 + corr. Apr. 1999) EN 61508-6:2001 Functional safety of electrica
46、l/electronic/programmable electronic safety-related systems Part 6: Guidelines on the application of IEC 61508-2 and IEC 61508-3 (IEC 61508-6:2000) EN 61508-7:2001 Functional safety of electrical/electronic/programmable electronic safety-related systems Part 7: Overview of techniques and measures (I
47、EC 61508-7:2000) BS EN 50271:2010- 7 - EN 50271:2010 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 60079-29-1:2007 and the following apply. 3.1 digital unit part of an electrical apparatus in which data is processed digitally. Analogue-digital(A/D)-
48、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 take place, for example warm-up, maintenance mode (configuration, calibr
49、ation, etc) or fault condition 3.3 software intellectual creation comprising the programs, procedures, rules and associated documentation pertaining to the operation of the digital unit 3.4 failure termination of the ability of a functional unit to provide a required function or operation of a functional unit in any way other than as required EN 61508-4:2001, 3.6.4, mod. 3.5 parameters settings by the manufacturer or user which effect the operation of the software, e.g. changing of alarm
