ISO 7240-7:2018
(Main)Fire detection and alarm systems — Part 7: Point-type smoke detectors using scattered light, transmitted light or ionization
Fire detection and alarm systems — Part 7: Point-type smoke detectors using scattered light, transmitted light or ionization
This document specifies requirements, test methods and performance criteria for point-type smoke detectors that operate using scattered light, transmitted light or ionization, for use in fire detection and alarm systems installed in buildings (see ISO 7240-1). This document also covers point-type smoke detectors that incorporate more than one smoke sensor operating on these principles. Additional requirements and test methods for such detectors are given in Annex N. For the testing of other types of smoke detectors, or smoke detectors working on different principles, this document is only intended to be used for guidance. This document is not applicable to smoke detectors with special characteristics, developed for specific risks. NOTE Certain types of detectors contain radioactive materials.
Systèmes de détection et d'alarme d'incendie — Partie 7: Détecteurs de fumée ponctuels utilisant le principe de la diffusion de la lumière, de la transmission de la lumière ou de l'ionisation
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 7240-7
Third edition
2018-06
Fire detection and alarm systems —
Part 7:
Point-type smoke detectors using
scattered light, transmitted light or
ionization
Systèmes de détection et d'alarme d'incendie —
Partie 7: Détecteurs de fumée ponctuels utilisant le principe de
la diffusion de la lumière, de la transmission de la lumière ou de
l'ionisation
Reference number
ISO 7240-7:2018(E)
©
ISO 2018
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ISO 7240-7:2018(E)
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ii © ISO 2018 – All rights reserved
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ISO 7240-7:2018(E)
Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General requirements . 3
4.1 Compliance . 3
4.2 Response threshold value of detectors using scattered or transmitted light . 3
4.3 Individual alarm indication . 3
4.4 Connection of ancillary devices . 3
4.5 Monitoring of detachable detectors . 3
4.6 Manufacturer's adjustments . 3
4.7 On-site adjustment of response behaviour . 4
4.8 Protection against the ingress of foreign bodies . 4
4.8.1 Closed detectors . 4
4.8.2 Open detectors . . 4
4.9 Response to slowly developing fires . 4
4.10 Requirements for software-controlled detectors . 5
4.10.1 General. 5
4.10.2 Software design. 5
4.10.3 Storage of programs and data . 5
5 Tests . 5
5.1 General . 5
5.1.1 Atmospheric conditions for tests. 5
5.1.2 Operating conditions for tests . 5
5.1.3 Mounting arrangements . 6
5.1.4 Tolerances . 6
5.1.5 Measurement of response threshold value . 6
5.1.6 Provision for tests . 6
5.1.7 Test schedule . 7
5.1.8 Test report . 7
5.2 Repeatability . 8
5.2.1 Object of test . 8
5.2.2 Test procedure . 8
5.2.3 Requirements . 8
5.3 Directional dependence . 8
5.3.1 Object of test . 8
5.3.2 Test procedure . 8
5.3.3 Requirements . 8
5.4 Reproducibility . 9
5.4.1 Object of test . 9
5.4.2 Test procedure . 9
5.4.3 Requirements . 9
5.5 Variation in supply parameters . 9
5.5.1 Object of test . 9
5.5.2 Test procedure . 9
5.5.3 Requirements .10
5.6 Air movement.10
5.6.1 Object of test .10
5.6.2 Test procedure .10
5.6.3 Requirements .11
5.7 Dazzling .11
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ISO 7240-7:2018(E)
5.7.1 Object of test .11
5.7.2 Test procedure .11
5.7.3 Requirements .11
5.8 Additional tests for open detectors .12
5.8.1 Object of the test .12
5.8.2 Test procedure .12
5.9 Dry heat (operational) .12
5.9.1 Object of test .12
5.9.2 Test procedure .12
5.9.3 Requirements .13
5.10 Cold (operational) .13
5.10.1 Object of test .13
5.10.2 Test procedure .13
5.10.3 Requirements .14
5.11 Damp heat, steady state (operational) .14
5.11.1 Object of test .14
5.11.2 Test procedure .14
5.11.3 Requirements .14
5.12 Damp heat, steady state (endurance) .15
5.12.1 Object of test .15
5.12.2 Test procedure .15
5.12.3 Requirements .15
5.13 Sulfur dioxide (SO ) corrosion (endurance) .15
2
5.13.1 Object of test .15
5.13.2 Test procedure .15
5.13.3 Requirements .16
5.14 Shock (operational) .16
5.14.1 Object of test .16
5.14.2 Test procedure .16
5.14.3 Requirements .17
5.15 Impact (operational) .17
5.15.1 Object of test .17
5.15.2 Test procedure .17
5.15.3 Requirements .18
5.16 Vibration, sinusoidal, (operational) .18
5.16.1 Object of test .18
5.16.2 Test procedure .18
5.16.3 Requirements .19
5.17 Vibration, sinusoidal (endurance) .19
5.17.1 Object of test .19
5.17.2 Test procedure .19
5.17.3 Requirements .20
5.18 Electromagnetic compatibility (EMC) immunity tests (operational) .20
5.19 Fire sensitivity .21
5.19.1 Object of test .21
5.19.2 Test procedure .21
5.19.3 Requirements .22
6 Test report .22
7 Marking .22
8 Data .23
8.1 Hardware documentation .23
8.2 Software documentation .23
Annex A (normative) Smoke tunnel for response threshold value measurements .25
Annex B (normative) Test aerosol for response threshold value measurements .26
Annex C (normative) Smoke-measuring instruments .27
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ISO 7240-7:2018(E)
Annex D (normative) Apparatus for dazzling test .31
Annex E (normative) Apparatus for impact test .32
Annex F (normative) Fire test room .34
Annex G (normative) Smouldering (pyrolysis) wood fire (TF2) .36
Annex H (normative) Glowing smouldering cotton fire (TF3) .39
Annex I (normative) Flaming plastics (polyurethane) fire (TF4) .41
Annex J (normative) Flaming liquid (n-heptane) fire (TF5) .44
Annex K (informative) Information concerning the construction of the smoke tunnel .47
Annex L (informative) Compensation for detector drift .49
Annex M (informative) Information concerning the construction of the measuring
ionization chamber .53
Annex N (normative) Apparatus for open detector static object test .55
Annex O (normative) Apparatus for testing the protection against the effect of moving objects .56
Bibliography .58
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ISO 7240-7:2018(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
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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
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URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire
fighting, Subcommittee SC 3, Fire detection and alarm systems.
This third edition cancels and replaces the second edition (ISO 7240:2011), which has been technically
revised.
The main change compared to the previous edition is the introduction of requirements and tests/
assessment methods for a new detector technology: open detectors. Definitions for open detectors and
traditional closed detectors have been included in Clause 3.
A list of all parts in the ISO 7240 series can be found on the ISO website.
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ISO 7240-7:2018(E)
Introduction
This document is based on a draft prepared by the European Committee for Standardization's CEN/
TC 72, Automatic fire detection systems.
A fire detection and alarm system is required to function satisfactorily not only in the event of fire, but
also during and after exposure to conditions likely to be met in practice, including corrosion, vibration,
direct impact, indirect shock and electromagnetic interference. Specific tests are intended to assess the
performance of the smoke detectors under such conditions.
This document is not intended to place any other restrictions on the design and construction of such
detectors.
This edition of this document introduces a requirement for smoke detectors that operate on the
scattered or transmitted light principle to be marked with one of two possible nominal response
threshold value bands. This marking provides for a clearer choice of response values so that the risk of
unwanted alarms may be decreased in installations where unfavourable environmental conditions are
present.
NOTE For some test fires, smoke detectors that operate on the scattered or transmitted light principle and
that have been factory set to the upper response threshold value band can fall outside one of the classification
limits given in ISO/TS 7240-9.
This edition of this document introduces additional requirements for optical smoke detectors with the
sensing volume(s) outside the enclosure.
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INTERNATIONAL STANDARD ISO 7240-7:2018(E)
Fire detection and alarm systems —
Part 7:
Point-type smoke detectors using scattered light,
transmitted light or ionization
1 Scope
This document specifies requirements, test methods and performance criteria for point-type smoke
detectors that operate using scattered light, transmitted light or ionization, for use in fire detection
and alarm systems installed in buildings (see ISO 7240-1). This document also covers point-type smoke
detectors that incorporate more than one smoke sensor operating on these principles. Additional
requirements and test methods for such detectors are given in Annex N.
For the testing of other types of smoke detectors, or smoke detectors working on different principles,
this document is only intended to be used for guidance. This document is not applicable to smoke
detectors with special characteristics, developed for specific risks.
NOTE Certain types of detectors contain radioactive materials.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 209:2007, Aluminium and aluminium alloys — Chemical composition
ISO 7240-1, Fire detection and alarm systems — Part 1: General and definitions
IEC 60068-1, Environmental testing — Part 1: General and guidance
IEC 60068-2-1, Environmental testing — Part 2-1: Tests — Tests A: Cold
IEC 60068-2-2, Environmental testing — Part 2-2: Tests — Tests B: Dry heat
IEC 60068-2-6, Environmental testing — Part 2-6: Tests — Test Fc: Vibration (sinusoidal)
IEC 60068-2-27, Environmental testing — Part 2-27: Tests — Test Ea and guidance: Shock
IEC 60068-2-42, Environmental testing — Part 2-42: Tests — Test Kc: Sulphur dioxide t
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