Fire detection and alarm systems — Part 8: Point-type fire detectors using a carbon monoxide sensor in combination with a heat sensor

ISO 7240-8:2015 specifies requirements, test methods, and performance criteria for point multi-sensor fire detectors that incorporate at least one carbon monoxide (CO) sensor in combination with one or more heat sensors, for use in fire detection and alarm systems installed in buildings (see ISO 7240‑1). For the testing of other types of CO multi-sensor fire detectors, or CO and heat multi-sensor fire detectors working on different principles, this part of ISO 7240 is only to be used for guidance. CO and heat multi-sensor fire detectors with special characteristics and developed for specific risks are not covered by this part of ISO 7240.

Systèmes de détection et d'alarme d'incendie — Partie 8: Détecteurs ponctuels utilisant un capteur de monoxide de carbone en combinaison avec un capteur de chaleur

General Information

Status
Published
Publication Date
15-Dec-2014
Current Stage
9093 - International Standard confirmed
Completion Date
17-Mar-2020
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ISO 7240-8:2014 - Fire detection and alarm systems
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INTERNATIONAL ISO
STANDARD 7240-8
Second edition
2014-12-15
Fire detection and alarm systems —
Part 8:
Point-type fire detectors using
a carbon monoxide sensor in
combination with a heat sensor
Systèmes de détection et d’alarme d’incendie —
Partie 8: Détecteurs ponctuels utilisant un capteur de monoxide de
carbone en combinaison avec un capteur de chaleur
Reference number
ISO 7240-8:2014(E)
©
ISO 2014

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ISO 7240-8:2014(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2014
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
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Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved

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ISO 7240-8:2014(E)

Contents Page
Foreword .vi
Introduction .viii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions and abbreviated terms . 2
3.1 Terms and definitions . 2
3.2 Abbreviated terms . 2
4 Requirements . 2
4.1 Compliance . 2
4.2 Individual alarm indication . 2
4.3 Connection of ancillary devices . 3
4.4 Monitoring of detachable detectors . 3
4.5 Manufacturer’s adjustments . 3
4.6 On-site adjustment of response behaviour . 3
4.7 Rate-sensitive response behaviour . 3
4.8 Requirements for software-controlled detectors . 4
4.8.1 General. 4
4.8.2 Software design. 4
4.8.3 The storage of programs and data . 4
5 Tests . 4
5.1 General . 4
5.1.1 Atmospheric conditions for tests. 4
5.1.2 Mounting arrangements . 4
5.1.3 Operating conditions for tests . 5
5.1.4 Tolerances . 5
5.1.5 Measurement of CO response value . 5
5.1.6 Measurement of heat sensor response value . 6
5.1.7 Provision for tests . 6
5.1.8 Test schedule . 7
5.1.9 Test report . 7
5.2 Repeatability of CO response . 7
5.2.1 Object of the test . 7
5.2.2 Test procedure . 7
5.2.3 Requirements . 7
5.3 Directional dependence of CO response . 8
5.3.1 Object of the test . 8
5.3.2 Test procedure . 8
5.3.3 Requirements . 9
5.4 Directional dependence of heat response . 9
5.4.1 Object of the test . 9
5.4.2 Test procedure . 9
5.4.3 Requirements . 9
5.5 Lower limit of heat sensitivity . 9
5.5.1 Object of the test . 9
5.5.2 Test procedure . 9
5.5.3 Requirements .10
5.6 Reproducibility of CO response .10
5.6.1 Object of the test .10
5.6.2 Test procedure .10
5.6.3 Requirements .10
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ISO 7240-8:2014(E)

5.7 Reproducibility of heat response .10
5.7.1 Object of the test .10
5.7.2 Test procedure .10
5.7.3 Requirements .11
5.8 Exposure to chemical agents at environmental concentrations .11
5.8.1 Object of the test .11
5.8.2 Test procedure .11
5.8.3 Requirements .11
5.9 Long-term stability of CO response.12
5.9.1 Object of the test .12
5.9.2 Test procedure .12
5.9.3 Requirements .12
5.10 Saturation .12
5.10.1 Object of the test .12
5.10.2 Test procedure .13
5.10.3 Requirements .13
5.11 Exposure to chemical agents which may be present during a fire .13
5.11.1 Object of the test .13
5.11.2 Test procedure .13
5.11.3 Requirements .14
5.12 Variation in supply parameters .14
5.12.1 Object of the test .14
5.12.2 Test procedure .14
5.12.3 Requirements .15
5.13 Air movement.15
5.13.1 Object of the test .15
5.13.2 Test procedure .15
5.13.3 Requirements .15
5.14 Dry heat (operational) .16
5.14.1 Object of the test .16
5.14.2 Test procedure .16
5.14.3 Requirements .16
5.15 Dry heat endurance .16
5.15.1 Object .16
5.15.2 Test procedure .17
5.15.3 Requirements .17
5.16 Cold (operational) .17
5.16.1 Object of the test .17
5.16.2 Test procedure .18
5.16.3 Requirements .18
5.17 Damp heat, cyclic (operational) .19
5.17.1 Object .19
5.17.2 Test procedure .19
5.17.3 Requirements .19
5.18 Damp heat, steady-state (endurance) .20
5.18.1 Object of the test .20
5.18.2 Test procedure .20
5.18.3 Requirements .20
5.19 Low humidity, steady-state (endurance) .21
5.19.1 Object of the test .21
5.19.2 Test procedure .21
5.19.3 Requirements .21
5.20 Sulfur dioxide SO corrosion (endurance) .22
2
5.20.1 Object of the test .22
5.20.2 Test procedure .22
5.20.3 Requirements .22
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ISO 7240-8:2014(E)

5.21 Shock (operational) .23
5.21.1 Object of the test .23
5.21.2 Test procedure .23
5.21.3 Requirements .24
5.22 Impact (operational) .24
5.22.1 Object of the test .24
5.22.2 Test procedure .24
5.22.3 Requirements .25
5.23 Vibration, sinusoidal, (operational) .25
5.23.1 Object of the test .25
5.23.2 Test procedure .25
5.23.3 Requirements .26
5.24 Vibration, sinusoidal (endurance) .26
5.24.1 Object of the test .26
5.24.2 Test procedure .26
5.24.3 Requirements .27
5.25 Electromagnetic Compatibility (EMC), Immunity tests (operational) .27
5.26 Fire sensitivity .28
5.26.1 Object of the test .28
5.26.2 Test procedure .28
6 Test report .30
7 Marking .30
8 Data .31
8.1 Hardware documentation .31
8.2 Software documentation .31
Annex A (normative) Gas test chamber for CO response value and cross
sensitivity measurements .33
Annex B (normative) Heat tunnel for response time and response temperature measurements .34
Annex C (normative) Apparatus for impact test .35
Annex D (normative) Fire test room .37
Annex E (normative) Smouldering (pyrolysis) wood fire (TF2) .39
Annex F (normative) Glowing smouldering cotton fire (TF3) .43
Annex G (normative) Open plastics (polyurethane) fire (TF4) .47
Annex H (normative) Liquid (n-heptane) fire (TF5) .50
Annex I (informative) Information concerning the construction of the gas test chamber .53
Annex J (informative) Construction of the heat tunnel .55
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ISO 7240-8:2014(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any
patent rights identified during the development of the document will be in the Introduction and/or on
the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword — Supplementary information.
The committee responsible for this document is ISO/TC 21, Equipment for fire protection and firefighting,
Subcommittee SC 3, Fire detection and alarm systems.
This second edition cancels and replaces the first edition (ISO 7240-8:2007), which has been
technically revised.
ISO 7240 consists of the following parts, under the general title Fire detection and alarm systems:
— Part 1: General and definitions
— Part 2: Control and indicating equipment
— Part 3: Audible alarm devices
— Part 4: Power supply equipment
— Part 5: Point-type heat detectors
— Part 6: Carbon monoxide fire detectors
...

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