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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 50054:1999 The Euro
2、pean Standard EN 50054:1998 has the status of a British Standard ICS 13.320 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Electrical apparatus for the detection and measurement of combustible gases General requirements and test methods Licensed Copy: sheffieldun sheffieldun,
3、 na, Mon Nov 06 02:36:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Electrotechnical Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 June 1999 BSI 06-1999 ISBN 0 580 3067
4、0 4 BS EN 50054:1999 Amendments issued since publication Amd. No.DateText affected National foreword This British Standard is the English language version of EN 50054:1998. It supersedes BS EN 50054:1991 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee
5、 GEL/31, Electrical apparatus for explosive atmospheres, to Subcommittee GEL/31/19, Gas detectors, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK intere
6、sts informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications ref
7、erred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a con
8、tract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 23 and a back co
9、ver. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 02:36:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CENELEC All ri
10、ghts of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50054:1998 E EUROPEAN STANDARDEN 50054 NORME EUROPE ENNE EUROPA ISCHE NORM July 1998 ICS 13.220Supersedes EN 50054:1991 + A1:1995 Descriptors: electrical apparatus, explosive atmosphere, detector, m
11、easuring apparatus, flammable gas, combustible gas, safety requirement, test method English version Electrical apparatus for the detection and measurement of combustible gases General requirements and test methods Appareils e lectriques de de tection et de mesure des gaz combustibles Re gles ge ne r
12、ales et me thodes dessais Elektrische Gera te fu r das Aufspu ren und die Messung brennbarer Gase Allgemeine Anforderungen und Pru fmethoden This European Standard was approved by CENELEC on 1996-12-09. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the
13、 conditions for giving this European Standard the status ofanationalstandardwithoutanyalteration.Up-to-datelistsand 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
14、 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 national standards bodies
15、 of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 02:36:43 GMT+00:00 2006, Uncontrolled Copy, (c) B
16、SI Page 2 EN 50054:1998 BSI 06-1999 Foreword This second edition of the 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
17、31, Electrical apparatus for explosive atmospheres, on the basis of EN 50054:1991, its amendment A1:1995 and a second amendment. This second amendment was approved by CENELEC on 1996-12-09 for incorporation into a new edition of EN 50054. This European Standard replaces EN 50054:1991 + A1:1995. The
18、following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 1999-01-01 latest date by which the national standards conflicting with the EN have to be withdrawn(dow) 1999-01-01 This European St
19、andard has been prepared under a mandate given to CENELEC by the European Commission and covers essential requirements of EC Directive 94/9/EC. Annexes designated informative are given for information only. In this standard, annexes A, B and C are informative. Contents Page Foreword2 1Scope3 2Normat
20、ive references3 3Definitions3 4General requirements5 4.1Introduction5 4.2Construction6 5Test requirements7 5.1Introduction7 5.2General requirements for tests7 5.3Normal conditions for test8 5.4Test methods9 6Field calibration kit12 7Information for use13 7.1Labelling and marking13 7.2Instruction man
21、ual see also 7.2 r)13 Annex A (informative) Flammability limits (i.e. LEL and UEL) of some flammable gases and vapours15 Annex B (informative) Determination of time of response18 B.1Aspirated apparatus (see also Figure B.1) B.2Apparatus that samples by diffusion18 Annex C (informative) Bibliography2
22、3 Figure 1 Warm-up time in clean air14 Figure 2 Warm-up time in standard test gas14 Figure B.1 Schematic example of equipment for use with aspirated apparatus19 Figure B.2 Schematic example of equipment during application of clean air or test gas20 Figure B.3 Schematic example of equipment showing c
23、hange-over from clean air to test gas to begin the time of response measurement (see also B.2.2)20 Figure B.4 Schematic example of applicator and sensor inlet during application of test gas or clean air (see also B.2.2)21 Figure B.5 An example of an automated test chamber (see also B.2.3.1)22 Licens
24、ed Copy: sheffieldun sheffieldun, na, Mon Nov 06 02:36:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 50054:1998 BSI 06-1999 1 Scope 1.1 This European Standard specifies general requirements for construction and testing and describes the test methods that apply to portable, transportable an
25、d fixed apparatus for the detection and measurement of combustible gas or vapour concentrations with air. The apparatus, or parts thereof, is intended for use in potentially explosive atmospheres (see 3.1) and in mines susceptible to firedamp. This European standard is supplemented by the following
26、European Standards, concerning the specific requirements for performance of the various types of apparatus. EN 50055, Performance requirements for Group I apparatus indicating up to 5 % (V/V) methane in air. EN 50056, Performance requirements for Group I apparatus indicating up to 100 % (V/V) methan
27、e. EN 50057, Performance requirements for Group II apparatus indicating up to 100 % lower explosive limit. EN 50058, Performance requirements for Group II apparatus indicating up to 100 % (V/V) gas. NOTE 1Group I apparatus indicating up to 100 % (V/V) methane and Group II apparatus indicating up to
28、100 % (V/V) gas are suitable for use only with the specific gases for which they have been calibrated. NOTE 2For the purposes of this European Standard the term combustible gas includes combustible vapours but excludes mist and dust, see 3.3, note 1. 1.2 This European Standard is applicable to combu
29、stible gas detection apparatus intended to provide an indication alarm and/or other output function, the purpose of which is to give a warning of potential explosion hazard and in some cases to initiate automatic or manual protective actions. 1.3 This European Standard is applicable to apparatus, in
30、cluding the integral sampling systems of aspirated apparatus intended to be used for commercial and industrial safety applications. 1.4 This European Standard does not apply to external sampling systems, or to apparatus of the laboratory or scientific types, or to apparatus used only for process con
31、trol purposes. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments t
32、o or revisions of any of these publications apply to the European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 50055:1998, Electrical apparatus for the detection and measurement of combustible gas
33、es Performance requirements for Group I apparatus indicating up to 5 % (V/V) methane in air. EN 50056:1998, Electrical apparatus for the detection and measurement of combustible gases Performance requirements for Group I apparatus indicating up to 100 % (V/V) methane in air. EN 50057:1998, Electrica
34、l apparatus for the detection and measurement of combustible gases Performance requirements for Group II apparatus indicating up to 100 % lower explosive limit. EN 50058:1998, Electrical apparatus for the detection and measurement of combustible gases Performance requirements for Group II apparatus
35、indicating up to 100 % (V/V) gas. EN 60068-2-6:1995, Environmental testing Part 2: Tests Test Fc: Vibration (sinusoidal). (IEC 60068-2-6:1995 + corrigendum Mar. 1995) EN 61000-4-3:1996, Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques Section 3: Radiated, radio frequenc
36、y, electromagnetic field immunity test. (IEC 61000-4-3:1995, modified) EN 61000-4-4:1995, Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques Section 4: Electrical fast transient/burst immunity test. (IEC 61000-4-4:1995) HD 481.1 S1, Electromagnetic compatibility for indus
37、trial-process measurement and control equipment Part 1: General introduction. (IEC 60801-1:1984) ISO 6142:1981, Gas analysis Preparation of calibration gas mixtures Weighing methods. ISO 6145:1986, Gas analysis Preparation of calibration gas mixtures Dynamic volumetric methods (Parts 1, 3, 4 and 6).
38、 ISO 6147:1979, Gas analysis Preparation of calibration gas mixtures Saturation method. 3 Definitions The following definitions are applicable in this European Standard and in the European Standards listed in 1.1. 3.1 potentially explosive atmosphere an atmosphere which could become explosive (the d
39、anger is a potential one) 3.2 firedamp a flammable gas, consisting mainly of methane, found naturally in mines Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 02:36:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 50054:1998 BSI 06-1999 3.3 explosive gas atmosphere a mixture with air,
40、under normal atmospheric conditions, of flammable materials in the form of gas, vapour or mist, in which, after ignition, combustion spreads throughout the unconsumed mixture NOTE 1This definition specifically excludes dusts and fibres in suspension in air. Mists, though included in the definition a
41、re not covered by this European Standard. NOTE 2Although a mixture which has a concentration above the upper explosive limit (see 3.5) is not an explosive atmosphere, in certain cases for area classification purposes it is advisable to consider it as an explosive gas atmosphere. NOTE 3Normal atmosph
42、eric conditions include variations above and below reference levels of 101,3 kPa (1013 mbar) and 20 8C provided the variations have negligible effect on the explosion properties of the flammable materials. 3.4 lower explosive limit (LEL) the volume ratio of flammable gas or vapour in air below which
43、 an explosive gas atmosphere will not be formed (see annex A) 3.5 upper explosive limit (UEL) the volume ratio of flammable gas or vapour in air above which an explosive gas atmosphere will not be formed (see also note 2 to 3.3) (see annex A) 3.6 type of protection the measures applied in the constr
44、uction of electrical apparatus to prevent ignition of the surrounding explosive atmosphere by such apparatus (see 3.1.2) 3.7 Group I apparatus electrical apparatus for mines susceptible to firedamp 3.8 Group II apparatus electrical apparatus for places with a potentially explosive atmosphere, other
45、than mines susceptible to firedamp 3.9 fixed apparatus an apparatus which is intended to have all parts permanently installed 3.10 transportable apparatus an apparatus not intended to be portable, but which can readily be moved from one place to another 3.11 portable apparatus spot reading or contin
46、uously sensing apparatus that has been designed to be readily carried from place to place and to be used whilst being carried. Portable apparatus is battery powered and includes, but is not limited to: a) hand-held apparatus, typically less than 1 kg, suitable for single-handed operation; b) persona
47、l monitors, similar in size and mass to the hand held apparatus, that are continuously operating (but not necessarily continuously sensing) whilst attached to the user; and c) larger apparatus up to 5 kg that can be operated by the user whilst suspended by hand, by a shoulder strap or by a carrying
48、harness; it may or may not have a hand directed probe 3.12 continuous duty apparatus combustible gas detecting apparatus which are continuously powered but may have continuous or intermittent sensing 3.13 spot reading apparatus an apparatus intended to be used for short periods of time as required 3
49、.14 alarm-only apparatus apparatus having an alarm but not having a meter or other indicating device that would allow measurement of the deviations permitted by the requirements of the appropriate European standards listed in 1.1 3.15 sensor an assembly in which the sensing element is housed and which may contain associated circuit components 3.16 remote sensor a sensor which is not integral with the main body of the apparatus 3.17 diffusion apparatus an apparatus in which the transfer of g
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