IEC 60079-29-4-2009 Explosive atmospheres - Part 29-4 Gas detectors - Performance requirements of open path detectors for flammable gas《易爆气体环境.第29-4部分 瓦斯探测器.易燃性气体用开路式探测器的性能要求》.pdf

《IEC 60079-29-4-2009 Explosive atmospheres - Part 29-4 Gas detectors - Performance requirements of open path detectors for flammable gas《易爆气体环境.第29-4部分 瓦斯探测器.易燃性气体用开路式探测器的性能要求》.pdf》由会员分享，可在线阅读，更多相关《IEC 60079-29-4-2009 Explosive atmospheres - Part 29-4 Gas detectors - Performance requirements of open path detectors for flammable gas《易爆气体环境.第29-4部分 瓦斯探测器.易燃性气体用开路式探测器的性能要求》.pdf（72页珍藏版）》请在麦多课文档分享上搜索。

1、 IEC 60079-29-4Edition 1.0 2009-11INTERNATIONAL STANDARD NORME INTERNATIONALEExplosive atmospheres Part 29-4: Gas detectors Performance requirements of open path detectors for flammable gases Atmosphres explosives Partie 29-4: Dtecteurs de gaz Exigences daptitude la fonction des dtecteurs de gaz inf

2、lammables chemin ouvert IEC60079-29-4:2009 colourinsideTHIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2009 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, inc

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16、vous avez des questions, visitez le FAQ du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 60079-29-4Edition 1.0 2009-11INTERNATIONAL STANDARD NORME INTERNATIONALEExplosive atmospheres Part 29-4: Gas detectors Performance requirements of open path

17、detectors for flammable gases Atmosphres explosives Partie 29-4: Dtecteurs de gaz Exigences daptitude la fonction des dtecteurs de gaz inflammables chemin ouvert INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE VICS 29.260.20 PRICE CODECODE PRIXISBN 2-8318-1067-6

18、Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale colourinside 2 60079-29-4 IEC:2009 CONTENTS FOREWORD.4 1 Scope.6 2 Normative references .7 3 Terms and definitions .7 3.1 Equipment.7 3.2 Alarms.8 3.3 Signals and indic

19、ations8 3.4 Gaseous atmospheres.8 3.5 Optical equipment .9 3.6 Performance characteristics 10 4 General requirements.11 4.1 Detection equipment .11 4.1.1 Components 11 4.1.2 Electrical assemblies and components 11 4.1.3 Optical radiation 11 4.2 Construction11 4.2.1 General .11 4.2.2 Indicating devic

20、es11 4.2.3 Alarm or output functions.12 4.2.4 Fault signals12 4.2.5 Adjustments 12 4.3 Software-controlled equipment 12 4.3.1 Conversion errors13 4.3.2 Software13 4.3.3 Data transmission13 4.3.4 Self-test routines .13 4.3.5 Functional concept 14 5 Test requirements 14 5.1 Introduction .14 5.2 Genera

21、l requirements for tests 15 5.2.1 Samples and sequence of tests .15 5.2.2 Constructional checks .15 5.2.3 Preparation of samples15 5.2.4 Equipment for calibration and test .16 5.3 Normal conditions for test18 5.3.1 General .18 5.3.2 Operating distance for laboratory tests 18 5.3.3 Test gases.18 5.3.

22、4 Test gas integral concentrations 18 5.3.5 Voltage19 5.3.6 Ambient temperature .19 5.3.7 Ambient humidity.19 5.3.8 Ambient atmosphere19 5.3.9 Preparation of equipment 19 5.3.10 Stabilization.19 5.3.11 Communications options20 60079-29-4 IEC:2009 3 5.3.12 Gas detection equipment as part of systems20

23、 5.4 Test methods 20 5.4.1 Initial preparation and procedure .20 5.4.2 Unpowered storage .20 5.4.3 Calibration curve (not applicable to alarm only equipment with fixed settings) 20 5.4.4 Stability .21 5.4.5 Alarm reliability21 5.4.6 Temperature variation .22 5.4.7 Water vapour interference .23 5.4.8

24、 Vibration23 5.4.9 Drop test for portable and transportable equipment .24 5.4.10 Alignment 24 5.4.11 Time of response.25 5.4.12 Minimum time to operate (spot-reading equipment) .25 5.4.13 Battery capacity.25 5.4.14 Power supply variations (externally powered equipment) .26 5.4.15 Power supply interr

25、uptions and transients .27 5.4.16 Recovery from power supply interruption .27 5.4.17 Electromagnetic compatibility (EMC) .27 5.4.18 Beam block fault28 5.4.19 Partial obscuration.28 5.4.20 Long range operation 29 5.4.21 Direct solar radiation (applicable for equipment intended for outdoor use).29 6 F

26、ield verification equipment30 7 Information for use .30 7.1 Labelling and marking .30 7.2 Instruction manual.30 Annex A (informative) Water vapour test apparatus .32 Bibliography33 Figure 1 Equipment for gas calibration and speed of response test17 Figure A.1 Water vapour test apparatus.32 4 60079-2

27、9-4 IEC:2009 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ EXPLOSIVE ATMOSPHERES Part 29-4: Gas detectors Performance requirements of open path detectors for flammable gases FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all n

28、ational electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Techn

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30、. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2)

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34、ion shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independen

35、t certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any perso

36、nal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative refe

37、rences cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for

38、 identifying any or all such patent rights. International Standard IEC 60079-29-4 has been prepared by IEC technical committee 31: Equipment for explosive atmospheres. This standard supplements and modifies the general requirements of IEC 60079-0. Where a requirement of this standard conflicts with

39、a requirement of IEC 60079-0, the requirement of this standard shall take precedence. The text of this standard is based on the following documents: FDIS Report on voting 31/819/FDIS 31/841/RVD Full information on the voting for the approval of this standard can be found in the report on voting indi

40、cated in the above table. 60079-29-4 IEC:2009 5 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of the IEC 60079 series, under the general title: Explosives atmospheres, can be found on the IEC website. The committee has decided that the conte

41、nts of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. IMPORT

42、ANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. 6 60079-29-4 IEC:2009 EXPLOSIVE ATMOSPHERES Part 29-

43、4: Gas detectors Performance requirements of open path detectors for flammable gases 1 Scope This part of IEC 60079-29 specifies performance requirements of equipment for the detection and measuring of flammable gases or vapours in ambient air by measuring the spectral absorption by the gases or vap

44、ours over extended optical paths, ranging typically from one metre to a few kilometres. Such equipment measures the integral concentration of the absorbing gas over the optical path in units such as LFL metre for flammable gases. NOTE 1 Actual values of concentration can be deduced only where it can

45、 be established that the concentration is uniform over the optical path, for example in very short optical paths (100 mm). In such cases, the equipment is within the scope of IEC 60079-29-1. NOTE 2 This standard is based upon present absorption techniques using infrared radiation. Other techniques a

46、nd applications may require additional test considerations (e.g. pressure test). Equipment falling within the scope of this standard is classified by the following types: Type 1: an optical transmitter and receiver, located at either end of a path through the atmosphere to be monitored. Type 2: an o

47、ptical transceiver (i.e. combined transmitter and receiver) and a suitable reflector, which may be a topographic feature or a retroreflector, located at either end of a path through the atmosphere to be monitored. This standard is also applicable when an equipment manufacturer makes any claims regar

48、ding 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 should be extended or supplemented, where necessary, to verify the claimed performance. The additional tests shall be agr

49、eed between the manufacturer and the test laboratory and identified and described in the test report. This standard does not apply to any of following: a) equipment intended to provide range resolution of gas concentration (e.g. Light direction and ranging (LIDAR); b) equipment consisting of a passive optical receiver without a dedicated optical source; c) equipment intended to measure the local volum