1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 50104:2010Electrical apparatus for thedetection and measurementof oxygen Performancerequirements and test methodsBS EN 50104:2010 BRITISH STANDARDNational forewordThis Brit
2、ish Standard is the UK implementation of EN 50104:2010. Itsupersedes BS EN 50104:2002 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee GEL/31/19, Gas detectors.A list of organizations represented on this committee can beobtained on request to its secreta
3、ry.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 71925 7ICS 13.320; 29.260.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was pu
4、blished under the authority of theStandards Policy and Strategy Committee on 28 February 2011.Amendments issued since publicationDate Text affectedBS EN 50104:2010EUROPEAN STANDARD EN 50104 NORME EUROPENNE EUROPISCHE NORM June 2010 CENELEC European Committee for Electrotechnical Standardization Comi
5、t 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 by any means reserved worldwide for CENELEC members. Ref. No. EN 50104:2010 E ICS 13.320 Super
6、sedes EN 50104:2002 + A1:2004English version Electrical apparatus for the detection and measurement of oxygen - Performance requirements and test methods Appareils lectriques de dtection et de mesure de loxygne - Rgles de performance et mthodes dessai Elektrische Gerte fr die Detektion und Messung v
7、on Sauerstoff - Anforderungen an das Betriebsverhalten und Prfverfahren 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 status of a nationa
8、l 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, German). A version in a
9、ny 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, Bulgaria, Croatia, Cyprus,
10、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 50104:2010EN 50104:2010 2 F
11、oreword 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 potentially explosive atmosphe
12、res, on the basis of EN 50104:2002. It was submitted to the Unique Acceptance Procedure and approved by CENELEC as EN 50271 on 2010-06-01. This document supersedes EN 50104:2002 + A1:2004. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent r
13、ights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. The 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) 2011-06-01 latest date by w
14、hich 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 Trade Association and covers essential requirements of EC Directive 94/9/EC. See Annex
15、ZZ. The State of the Art is included in Annex ZY “Significant changes between this European Standard and EN 50104:2002”. _ BS EN 50104:2010 3 EN 50104:2010 Contents Contents 3 1 Scope 4 2 Normative references . 4 3 Definitions 5 3.1 Gas properties 5 3.2 Types of apparatus . 5 3.3 Sensors 6 3.4 Suppl
16、y of gas to apparatus 7 3.5 Signals and alarms . 7 3.6 Times . 7 4 General requirements 8 4.1 Introduction . 8 4.2 Construction . 8 4.3 Labelling and marking . 10 4.4 Instruction manual 10 5 Test methods . 12 5.1 Introduction . 12 5.2 General requirements for tests 12 5.3 Normal conditions for test
17、. 13 5.4 Test methods and performance requirements 15 Annex A (informative) Sequence of tests 27 Annex ZY (informative) Significant changes between this European Standard and EN 50104:2002 . 28 Annex ZZ (informative) Coverage of Essential Requirements of EC Directives 29 Figure Figure 1 - Warm-up ti
18、me in reference air or in zero test gas (typical) . 26 BS EN 50104:2010EN 50104:2010 4 1 Scope This European Standard specifies general requirements for construction, testing and performance, and describes the test methods that apply to portable, transportable and fixed apparatus for the measurement
19、 of the oxygen concentration in gas mixtures indicating up to 25 % (v/v). The apparatus, or parts thereof, may be intended for use in potentially explosive atmospheres (see 4.1) and in mines susceptible to firedamp. In the case of inert gas purging (inertization),it applies also to apparatus with an
20、 oxygen measuring function for explosion protection. NOTE Commonly used oxygen sensors in commercial equipment for industrial application are: a) paramagnetic sensors; b) electrochemical sensors (aqueous and solid electrolytes); c) tunable diode laser absorption spectroscopy sensors (TDLAS). This st
21、andard is also applicable when an apparatus manufacturer makes any claims regarding any special features of construction or superior performance that exceed the minimum requirements of this standard. All such claims shall be verified and the test procedures shall be extended or supplemented, where n
22、ecessary, to verify the claimed performance. The additional tests shall be agreed between the manufacturer and test laboratory and identified and described in the test report. This European Standard is applicable to oxygen alarm apparatus intended to measure reliably the oxygen concentration, to pro
23、vide an indication, alarm or other output function, the purpose of which is to give a warning of a potential hazard and, in some cases, to initiate automatic or manual protective action(s), whenever the level exceeds or falls below a preselected alarm concentration. This standard is applicable to ap
24、paratus, including integral sampling systems of aspirated apparatus, intended to be used for commercial, industrial and non-residential safety applications. This standard does not apply to external sampling systems, or to apparatus of laboratory or scientific type, or to medical equipment, or to app
25、aratus used only for process control purposes. For apparatus used for sensing the presence of multiple gases, this standard applies only to the measurement of oxygen. This standard is also applicable to apparatus using optical principles (e.g. TDLAS), where the optical transmitter and receiver or th
26、e optical transceiver (i.e. combined transmitter and receiver) and a suitable reflector are not located in a common enclosure. However, in this case it will be necessary to modify the test conditions described in Clause 5 and to introduce supplementary tests to Clause 6 of this standard. Such supple
27、mentary tests will include alignment, beam block fault, long range operation. Guidance to appropriate modification of the test conditions and supplementary tests may be taken from EN 60079-29-4. Modifications of the test conditions as well as modified and supplementary tests shall be agreed between
28、the manufacturer and test laboratory and identified and described in the test report. 2 Normative references 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
29、the referenced document (including any amendments) applies. EN 50270 Electromagnetic compatibility - Electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen EN 50271 Electrical apparatus for the detection and measurement of combustible gases, toxic gases or
30、 oxygen - Requirements and tests for apparatus using software and/or digital technologies EN 60079-0 Explosive atmospheres - Part 0: Equipment - General requirements (IEC 60079-0) EN 60079-29-4 Explosive atmospheres - Part 29-4: Gas detectors - Performance requirements of open path detectors for fla
31、mmable gases (IEC 60079-29-4)BS EN 50104:2010 5 EN 50104:2010 3 Definitions For the purposes of this document, the following terms and definitions apply. 3.1 Gas properties 3.1.1 ambient air normal atmosphere surrounding the apparatus 3.1.2 poisons (for sensors) substances which lead to temporary or
32、 permanent loss of sensitivity of the sensors 3.1.3 reference air air, under normal ambient conditions, with an oxygen concentration of (21 0,4) % (v/v) 3.1.4 standard test gas test gas with a composition specified for each apparatus to be used for all tests unless otherwise stated (see 5.3.2) 3.1.5
33、 volume fraction (v/v) quotient of the volume of a specified component and the sum of the volumes of all components of a gas mixture before mixing, all volumes referring to the pressure and the temperature of the gas mixture NOTE The volume fraction and volume concentration take the same value if, a
34、t the same state conditions, the sum of the component volumes before mixing and the volume of the mixture are equal. However, because the mixing of two or more gases at the same state conditions is usually accompanied by a slight contraction or, less frequently, a slight expansion, this is not gener
35、ally the case. 3.1.6 zero test gas gas, such as nitrogen, which is free of oxygen, and interfering and contaminating substances 3.2 Types of apparatus 3.2.1 alarm-only apparatus apparatus having an alarm but not having a meter or other indicating device 3.2.2 aspirated apparatus apparatus that sampl
36、es the gas by drawing it to the gas sensor, for example, by means of a hand-operated or electric pump 3.2.3 automatically aspirated apparatus aspirated apparatus with an integral pump 3.2.4 continuous duty apparatus apparatus that is powered for long periods of time, but may have either continuous o
37、r intermittent sensing 3.2.5 diffusion apparatus apparatus in which the transfer of gas from the atmosphere to the gas sensor takes place by random molecular movement, i.e. under conditions in which there is not aspirated flow BS EN 50104:2010EN 50104:2010 6 3.2.6 fixed apparatus apparatus that is i
38、ntended to have all parts permanently installed 3.2.7 portable apparatus apparatus that has been designed to be carried readily from place to place and to be used while it is being carried. A portable apparatus is battery powered and includes, but is not limited to a) a hand-held apparatus, typicall
39、y less than 1 kg, suitable for one-handed operation without accessories (such as sampling probes, sample lines) fitted, b) personal monitors, similar in size and mass to the hand-held apparatus, that are continuously operating (but not necessarily continuously sensing) while they are attached to the
40、 user, and c) another apparatus that can be operated by the user while it is carried either by hand, by a shoulder strap or carrying harness, and which may or may not have a hand-directed probe 3.2.8 spot-reading apparatus apparatus intended to be used for short, intermittent or irregular periods of
41、 time as required (typically 5 min or less) 3.2.9 transportable apparatus apparatus not intended to be portable, but which can be readily moved from one place to another 3.2.10 stand-alone gas detection apparatus fixed gas detection apparatus that provide a conditioned electronic signal or output in
42、dication to a generally accepted industry standard (such as 4-20 mA), intended to be utilized with stand-alone control units, or signal processing data acquisition, central monitoring and similar systems which typically process information from various locations and sources including, but not limite
43、d to, gas detection apparatus 3.2.11 stand-alone control unit fixed gas detection control units intended to provide meter indication, alarm functions, output contacts and/or alarm signal outputs when utilized with stand-alone gas detection apparatus 3.3 Sensors 3.3.1 integral sensor sensor which is
44、integral to the main body of the apparatus 3.3.2 measuring principle type of physical or physico-chemical detection principle and the measurement procedure to determine the measured value 3.3.3 remote sensor sensor which is not integral to the main body of the apparatus 3.3.4 sensing element part of
45、 the sensor which directly picks up the quantity to be measured and which is sensitive to that quantity BS EN 50104:2010 7 EN 50104:2010 3.3.5 sensor assembly in which the sensing element is housed and which may also contain associated circuit components 3.4 Supply of gas to apparatus 3.4.1 sample l
46、ine a means by which the gas being sampled is conveyed to the sensor including accessories, e.g. filter, water trap 3.4.2 sampling probe separate sample line which is attached to the apparatus as required, that may or may not be supplied with the apparatus. It is usually short (e.g. in the order of
47、1 m) and rigid (although it may be telescopic), but it may be connected by a flexible tube to the apparatus 3.5 Signals and alarms 3.5.1 alarm set point fixed or adjustable setting of the apparatus that is intended to pre-set the level of concentration at which the apparatus will automatically initi
48、ate an indication, alarm or other output function 3.5.2 fault signal audible, visible or other type of output, different from the alarm signal, permitting, directly or indirectly, a warning or indication that the apparatus is not working satisfactorily 3.5.3 latching alarm alarm that,once activated,
49、 requires deliberate action to be deactivated 3.5.4 repeatability closeness of agreement between the results of successive measurements of the same value of the same quantity carried out by the same method, with the same measuring instruments, by the same observer, in the same laboratory at quite short intervals of time in unchanged conditions 3.6 Times 3.6.1 drift variation in the apparatus indication with time, at any fixed gas volume fraction under constant ambient conditions 3.6.2 final indication indication given by the apparatus a
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