1、 IEC 60079-29-1 Edition 2.0 2016-07 INTERNATIONAL STANDARD Explosive atmospheres Part 29-1: Gas detectors Performance requirements of detectors for flammable gases IEC 60079-29-1:2016-07(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2016 IEC, Geneva, Switzerland All rights reserved. Unless o
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10、ch/csc If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC 60079-29-1 Edition 2.0 2016-07 INTERNATIONAL STANDARD Explosive atmospheres Part 29-1: Gas detectors Performance requirements of detectors for flamm
11、able gases INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 29.260.20 ISBN 978-2-8322-3539-3 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. 2 IEC 60079-29-1:2016 IEC 2016 CONTENTS FOREWORD. 4 IN
12、TRODUCTION . 8 1 Scope 9 2 Normative references 10 3 Terms and definitions 10 4 General requirements 15 4.1 Overview 15 4.1.1 Manufacturer claims . 15 4.1.2 Equipment ratings 16 4.2 Construction . 16 4.2.1 General . 16 4.2.2 Indicating devices 16 4.2.3 Alarm signals . 18 4.2.4 Fault signals 18 4.2.5
13、 Adjustments . 19 4.2.6 Battery-powered equipment 19 4.2.7 Gas detection transmitter for use with separate gas detection control units 19 4.2.8 Separate gas detection control units for use with gas detection transmitter(s) . 19 4.2.9 Software-controlled equipment . 20 4.3 Marking . 21 4.4 Instructio
14、n manual . 21 5 Test methods. 23 5.1 Overview 23 5.2 General requirements for tests 24 5.2.1 General . 24 5.2.2 Samples and sequence of tests 24 5.2.3 Preparation of equipment before testing . 24 5.2.4 Mask for calibration and tests . 25 5.3 Normal conditions for test 25 5.3.1 General . 25 5.3.2 Tes
15、t gas(es) 25 5.3.3 Standard test gas . 26 5.3.4 Flow rate for test gases 26 5.3.5 Voltage 26 5.3.6 Temperature 26 5.3.7 Pressure 27 5.3.8 Humidity 27 5.3.9 Acclimation time . 27 5.3.10 Orientation . 27 5.3.11 Communications options 27 5.3.12 Gas detection equipment as part of systems . 27 5.4 Test m
16、ethods 27 5.4.1 General . 27 5.4.2 Unpowered storage 28 5.4.3 Calibration and adjustment . 28 IEC 60079-29-1:2016 IEC 2016 3 5.4.4 Stability . 29 5.4.5 Alarm set point(s) . 30 5.4.6 Temperature 30 5.4.7 Pressure 31 5.4.8 Humidity of test gas . 31 5.4.9 Air velocity . 31 5.4.10 Flow rate for aspirate
17、d equipment 32 5.4.11 Orientation . 32 5.4.12 Vibration 32 5.4.13 Drop test for portable and transportable equipment . 33 5.4.14 Warm-up time 33 5.4.15 Time of response . 34 5.4.16 High gas concentration operation above the measuring range . 34 5.4.17 Battery capacity . 34 5.4.18 Power supply variat
18、ions . 35 5.4.19 Addition of sampling probe . 35 5.4.20 Other gases and poisons 35 5.4.21 Electromagnetic compatibility . 36 5.4.22 Field calibration kit . 36 5.4.23 Software function . 36 Annex A (normative) Performance requirements . 37 Annex B (informative) Determination of time of response 43 B.
19、1 Aspirated equipment . 43 B.1.1 Test rig 43 B.1.2 Equipment without internal pump 43 B.1.3 Equipment with internal pump. 43 B.2 Equipment that samples by diffusion 44 B.2.1 Calibration mask method 44 B.2.2 Diffusion or flow methods . 44 Bibliography . 45 Figure 1 Warm-up time in clean air (typical)
20、 15 Figure 2 Warm-up time in standard test gas (typical) 15 Figure B.1 Schematic example of test rig for use with aspirated equipment . 44 Table A.1 Performance requirements (1 of 6) 37 4 IEC 60079-29-1:2016 IEC 2016 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ EXPLOSIVE ATMOSPHERES Part 29-1: Gas de
21、tectors Performance requirements of detectors for flammable gases FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote internation
22、al 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, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter refe
23、rred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate i
24、n this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an interna
25、tional consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonab
26、le efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Pu
27、blications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformit
28、y. 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 independent certification bodies. 6) All users should ensure that they have the latest edition of this publication.
29、 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 personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for
30、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 references cited in this publication. Use of the referenced publications is indispensable for the correct app
31、lication 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 identifying any or all such patent rights. International Standard IEC 60079-29-1 has been prepared by IE
32、C technical committee 31: Equipment for explosive atmospheres. This second edition of IEC 60079-29-1 cancels and replaces the first edition of IEC 60079-29-1:2007 series and constitutes a technical revision. Significant technical changes between IEC 60079-29-1, Edition 1 (2007), and IEC 60079-29-1,
33、Edition 2 (2016), is as listed below: Significant changes with respect to IEC 60079-29-1:2007 IEC 60079-29-1:2016 IEC 2016 5 Type Changes Clause Minor and editorial changes Extension Major technical changes Measuring range up to 20 %LEL (Modified requirements) All X Definitions (Additional clarifica
34、tions) 3 X Manufacturers claims (special applications requirements) 4.1.1 X General construction (Malfunction effects on safety related function) 4.2.1 C1 General indicating devices (portable equipment with visual and audible indication) 4.2.2.1 C2 Suppression of indication and measured values below
35、 zero (functional limits) 4.2.2.5 C3 Fault signals (Fault indication below minimum voltage limit, sensor disconnection and zero drift condition) 4.2.4 C4 Adjustments (Zero and sensitivity adjustments) 4.2.5 C5 Marking (Portable equipment protective case) 4.3 X Instruction Manual (Additions and clari
36、fications) 4.4 C6 Samples and sequence of tests (Optical filter special sensitivity limits, and modification considerations) 5.2.2 X Preparation of equipment before testing (separate gas detection control units) 5.2.3 X Test gas (methane, and propane or butane for general purpose gas detector) 5.3.2
37、 C7 General test methods (selectable range and wiring worst case conditions) 5.4.1 X Calibration curve (fixed volume fractions) 5.4.3.2 C8 Response to different gases (semiconductor and catalytic high gas concentration exposure) 5.4.3.3 C9 Stability (duration of test method) 5.4.4 X Alarm set point(
38、s) (alarm set point test method) 5.4.5 X Temperature (portable) (temperature range and stabilization period) 5.4.6 C10 Temperature (all other equipment) (temperature range and stabilization period) 5.4.6 X Pressure (tolerance on pressure measurement) 5.4.7 X Humidity of test gas (test method clarifi
39、cation) 5.4.8 X Air velocity (test method clarification) 5.4.9 X Flow rate for aspirated equipment (test method clarification) 5.4.10 X Vibration (test method clarification) 5.4.12 X 6 IEC 60079-29-1:2016 IEC 2016 Type Changes Clause Minor and editorial changes Extension Major technical changes Drop
40、 test for portable and transportable equipment (Automatic re-starting or shut-down requirement clarification) 5.4.13 X Warm-up time (user prompt requirement) 5.4.14 C11 High gas concentration operation above the measuring range (test method and requirement clarification) 5.4.16 X Battery capacity (t
41、est method clarification) 5.4.17 X Power supply variation (minimum supply voltage fault limit) 5.4.18 C12 Poisons (applicable only to Group I apparatus with catalytic or semiconductor sensors) (test method clarification) 5.4.20.2 X Electromagnetic compatibility (test methods and requirements) 5.4.21
42、 C13 Field calibration kit (test method clarification) 5.4.22 X Software function (supporting documentation) 5.4.23 X Determination of time of response (test method clarification) Annex B X NOTE 1 The technical changes referred to include the significance of technical changes in the revised IEC Stan
43、dard, but they do not form an exhaustive list of all modifications from the previous version. More guidance may be found by referring to the Redline Version of the standard. Explanations: A) Definitions Minor and editorial changes Clarification decrease of technical requirements minor technical chan
44、ge editorial corrections. These are changes which modify requirements in an editorial or a minor technical way. They include changes of the wording to clarify technical requirements without any technical change, or a reduction in level of existing requirement. Extension Addition of technical options
45、 These are changes which add new or modify existing technical requirements, in a way that new options are given, but without increasing requirements for equipment that was fully compliant with the previous standard. Therefore, these will not have to be considered for products in conformity with the
46、preceding edition. Major technical changes Addition of technical requirements increase of technical requirements. These are changes to technical requirements (addition, increase of the level or removal) made in a way that a product conforming to the preceding edition will not always be able to fulfi
47、l the requirements given in the later edition. These changes have to be considered for products conforming to the preceding edition. For these changes additional information is provided in B) below. NOTE 2 These changes represent current technological knowledge. However, these changes should not nor
48、mally have an influence on equipment already placed on the market. IEC 60079-29-1:2016 IEC 2016 7 B) Information about the background of Major technical changes C1 Addition of malfunction effects not adversely affecting the safety related function (4.2.1). C2 Addition of visual and audible indicatio
49、n for portable equipment (4.2.2.1). C3 Addition of functional limits for suppression of indication and for measured values below zero (4.2.2.5). C4 Addition of requirements for fault indication below minimum voltage limit, sensor disconnection and zero drift condition (4.2.4). C5 Addition of requirements for zero and sensitivity adjustments (4.2.5). C6 Addition and clarification requirements for inclusion within the instruction manual (4.4). C7 Addition of methane and propane or butane as required test gases f
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