1、BSI Standards PublicationBS EN 45544-2:2015Workplace atmospheres Electrical apparatus used forthe direct detection and directconcentration measurement oftoxic gases and vapoursPart 2: Performance requirements forapparatus used for exposure measurementBS EN 45544-2:2015 BRITISH STANDARDNational forew
2、ordThis British Standard is the UK implementation of EN 45544-2:2015.It supersedes BS EN 45544-2:2000 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee EXL/31/1, Gas detectors.A list of organizations represented on this committee can beobtained on request
3、 to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 81574 4ICS 13.040.30; 13.320Compliance with a Briti
4、sh Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 28 February 2015.Amendments issued since publicationDate Text affectedBS EN 45544-2:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM
5、EN 45544-2 January 2015 ICS 13.040.30; 13.320 Supersedes EN 45544-2:1999 English Version 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 exposure measu
6、rement Atmosphres des lieux de travail - Appareillage lectrique utilis pour la dtection directe des vapeurs et gaz toxiques et le mesurage direct de leur concentration - Partie 2: Exigences de performance pour les appareillages utiliss pour la gestion de lexposition Arbeitsplatzatmosphre - Elektrisc
7、he Gerte fr die direkte Detektion und direkte Konzentrationsmessung toxischer Gase und Dmpfe - Teil 2: Anforderungen an das Betriebsverhalten von Gerten, die fr Expositionsmessungen eingesetzt werden This European Standard was approved by CENELEC on 24 November 2014. CEN and CENELEC members are boun
8、d to comply with the CEN/CENELEC Internal Regulations 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 CE
9、N-CENELEC Management Centre or to any CEN and CENELEC 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 CEN and CENELEC member into its own language and notified to the CEN-CEN
10、ELEC Management Centre has the same status as the official versions. CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, Fr
11、ance, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom European Committee for Electrotechnical Standardization Comit Europen de Normalisat
12、ion Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN/CENELEC All rights of exploitation in any form and by any means reserved worldwide for CEN national Members and for CENELEC Members. Ref. No. EN 45544-2:201
13、5 E BS EN 45544-2:2015EN 45544-2:2015 (E) 2 Contents Page Foreword . 3 Introduction . 4 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 General requirements . 5 5 Performance requirements . 5 5.1 General . 5 5.2 Standard requirements . 5 5.3 Unpowered storage . 6 5.4 Measurement of
14、deviations 6 5.5 Mechanical tests 6 5.5.1 Vibration . 6 5.5.2 Drop test . 6 5.6 Environmental tests 6 5.6.1 Temperature . 6 5.6.2 Pressure . 6 5.6.3 Humidity . 7 5.6.4 Air velocity . 7 5.7 Performance tests . 7 5.7.1 Alarm set point(s) 7 5.7.2 Time to alarm or alarm reading 7 5.7.3 Flow rate . 7 5.7
15、.4 Warm-up time . 7 5.7.5 Time of response . 7 5.7.6 Time of recovery 7 5.7.7 Addition of sampling probe (portable and transportable apparatus only) 7 5.7.8 Field calibration kit 7 5.7.9 Gas concentrations above the full scale indication 8 5.7.10 Extended operation in test gas 8 5.7.11 Orientation t
16、ests 8 5.8 Electrical tests . 8 5.8.1 Battery capacity . 8 5.8.2 Power supply variations . 8 5.8.3 Electromagnetic compatibility . 8 5.8.4 Time-weighted average (TWA) function 8 5.9 Stability . 8 5.10 Verification of software and digital components . 8 6 Uncertainty of measurement and lower limit of
17、 measurement. 9 6.1 Uncertainty of measurement 9 6.2 Lower limit of measurement . 9 Annex A (informative) Table of significant changes in comparison to EN 45544-2:1999 10 BS EN 45544-2:2015EN 45544-2:2015 (E) 3 Foreword This document (EN 45544-2:2015) has been prepared by CEN/CENELEC Joint Working G
18、roup Continuous Measuring Instruments (JWG CMI). The following dates are fixed: latest date by which this document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2015-11-24 latest date by which the national standards conflicting with
19、this document have to be withdrawn (dow) 2017-11-24 This document supersedes EN 45544-2:1999. BS EN 45544-2:2015EN 45544-2:2015 (E) 4 Introduction National laws and regulations based on European Directives require the assessment of the potential exposure of a worker to chemical agents in workplace a
20、tmospheres. EN 45544, Workplace atmospheres Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours, consists of the following parts: Part 1: General requirements and test methods; Part 2: Performance requirements for apparatus used for expo
21、sure measurement; Part 3: Performance requirements for apparatus used for general gas detection; Part 4: Guide for selection, installation, use and maintenance. EN 45544 series is based on EN 482 which specifies general performance requirements for procedures for measuring the concentration of chemi
22、cal agents in workplace atmospheres. These performance requirements are intended to apply under environmental conditions present at the workplace. However, because a wide range of environmental conditions are encountered in practice, this document specifies requirements that have to be fulfilled by
23、measuring procedures when tested under prescribed laboratory conditions. EN 45544-2 details the performance requirements outlined in EN 482 specifically for electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours intended for exposure measur
24、ement. EN 45544-3 details the performance requirements for general gas detection apparatus, e.g. safety warning, leak detection. The measuring range will be defined by the manufacturer. In general, the requirements for accuracy will be higher for EN 45544-2 apparatus than for EN 45544-3 apparatus. T
25、he same apparatus may be used for applications covered by EN 45544-2 and EN 45544-3. EN 45544 series will help manufacturers, test laboratories and users of apparatus to adopt a consistent approach to, and provide a framework for, the assessment of performance criteria. It is the manufacturers prima
26、ry responsibility to ensure that the apparatus meets the requirements laid down in this European Standard including environmental influences which can be expected to affect performance. For a given measurement task the range over which the requirements for the relative expanded uncertainty have to b
27、e met depends on the limit value. However, for most chemical agents the limit values have not been harmonized at the European level. Therefore, it was decided to use a reference value (standard test gas concentration) instead of the limit value for the performance tests. The list of standard test ga
28、s volume fractions is given in Annex A of EN 45544-1:2015. The values chosen are equal to or close to the limit values used in different European countries but are intended to be used only for type testing apparatus without any legal implications. Electrical apparatus used for the direct detection a
29、nd direct concentration measurement of toxic gases and vapours generate readings in clean air (zero readings) which vary with environmental conditions and time. This standard therefore includes test methods and requirements for acceptable variations in zero readings which are additional to the gener
30、al requirements of EN 482. BS EN 45544-2:2015EN 45544-2:2015 (E) 5 1 Scope This European Standard specifies the performance requirements outlined in EN 482 specifically for electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours in workplace
31、 atmospheres. This European Standard is applicable to apparatus used for exposure measurement. 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 references, only the edition cited appl
32、ies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 45544-1:2015, Workplace atmospheres - Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours - Part 1: General requirements an
33、d test methods 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 oxygen - Requirements and tests for appara
34、tus using software and/or digital technologies 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 45544-1:2015 apply. 4 General requirements Unless otherwise stated, the apparatus shall conform to the general requirements of EN 45544-1:2015, Clause 4 and
35、 these requirements shall be verified by visual inspection and by tests according to EN 45544-1:2015, 5.2.5. 5 Performance requirements 5.1 General The apparatus shall be tested in accordance with EN 45544-1:2015, Clause 5. A report of tests shall be prepared in accordance with EN 45544-1:2015, Clau
36、se 7. 5.2 Standard requirements The upper limit of measurement shall be equal to or greater than 2 times the volume fraction of the standard test gas given in EN 45544-1:2015, Annex A. Minimum requirements for the lower limit of measurement are also given in EN 45544-1:2015, Annex A. Lower limits of
37、 measurement less than those given in EN 45544-1:2015, Annex A are permitted. BS EN 45544-2:2015EN 45544-2:2015 (E) 6 The performance requirements that are referred to in 5.5 to 5.9 shall be as specified below: a) the deviation of the measured values in clean air shall be less than or equal to the l
38、ower limit of measurement in EN 45544-1:2015, Table A.1 and the value specified in the instruction manual; b) the deviation of the measured values in standard test gas shall be less than or equal to 20 % of the measured value. 5.3 Unpowered storage All apparatus shall conform to the relevant require
39、ments of 5.4 to 5.9 after storage. 5.4 Measurement of deviations See Clause 6. 5.5 Mechanical tests 5.5.1 Vibration During the vibration test, the apparatus shall not suffer any loss of function nor give any false alarm or fault signal. The apparatus shall not suffer damage resulting in hazard or lo
40、ss of function. The performance requirements as specified in 5.2a and 5.2b shall be met. 5.5.2 Drop test The apparatus shall not suffer damage resulting in hazard or loss of function. The apparatus shall remain in the measuring mode during and after the test. EXAMPLE Alarm devices, pump function, co
41、ntrols or display can lose function. The performance requirements specified in 5.2a and 5.2b shall be met. 5.6 Environmental tests 5.6.1 Temperature The deviation of the measured values at all temperatures from that at 20 C shall be in accordance with 5.2a and 5.2b. 5.6.2 Pressure The deviation of t
42、he measured values in clean air at all pressures from that at 100 kPa shall be in accordance with 5.2a. The deviation of the measured values in standard test gas at all pressures from that at 100 kPa shall be less than 35 %. BS EN 45544-2:2015EN 45544-2:2015 (E) 7 5.6.3 Humidity The deviation of the
43、 measured values at any relative humidity from that at adjustment shall be in accordance with 5.2a and 5.2b. 5.6.4 Air velocity The deviation of the measured values at any velocity from that under conditions of no forced ventilation shall be in accordance with 5.2a and 5.2b. 5.7 Performance tests 5.
44、7.1 Alarm set point(s) The alarm shall be activated by the test gas at each set point within t90. 5.7.2 Time to alarm or alarm reading The time to alarm or alarm reading shall not be greater than 20 s for temperatures at and above 5 C and 30 s for temperatures below 5 C. 5.7.3 Flow rate The low flow
45、 signal shall be activated. The performance requirements specified in 5.2b shall be met. 5.7.4 Warm-up time The performance requirements specified in 5.2a and 5.2b shall be met. 5.7.5 Time of response The response time t90shall not exceed 150 s. t50shall not exceed 60 s. For apparatus equipped with
46、a sample line or a probe, 3 s per metre length of sample line or probe shall be added to these values. 5.7.6 Time of recovery The recovery time t10shall not exceed 300 s. t50shall not exceed 60 s. For apparatus equipped with a sample line or a probe, 3 s per metre length of sample line or probe shal
47、l be added to these values. 5.7.7 Addition of sampling probe (portable and transportable apparatus only) The performance requirements specified in 5.2a and 5.2b shall be met. 5.7.8 Field calibration kit The performance requirements specified in 5.2a and 5.2b shall be met. BS EN 45544-2:2015EN 45544-
48、2:2015 (E) 8 5.7.9 Gas concentrations above the full scale indication The performance requirements specified in 5.2a and 5.2b shall be met. All gas concentrations above full scale indication shall result in an over-range indication and, where fitted, an alarm. 5.7.10 Extended operation in test gas T
49、he performance requirements specified in 5.2a and 5.2b shall be met. 5.7.11 Orientation tests The performance requirements specified in 5.2a and 5.2b shall be met. 5.8 Electrical tests 5.8.1 Battery capacity The performance requirements specified in 5.2a and 5.2b shall be met. The low battery indication shall be activated. 5.8.2 Power supply variations The performance requirements specified in 5.2a and 5.2b shall be met. No false alarm shall be activated. All output functions shall operate correctly. 5.8.3 Electromagnetic compatibility The apparatus
