ISO 7240-5:2018

INTERNATIONAL ISO
STANDARD 7240-5
Third edition
2018-05
Fire detection and fire alarm
systems —
Part 5:
Point type heat detectors
Systèmes de détection et d'alarme incendie —
Partie 5: Détecteurs de chaleur ponctuels
Reference number
ISO 7240-5:2018(E)
©
ISO 2018

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ISO 7240-5:2018(E)

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© ISO 2018
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Published in Switzerland
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ISO 7240-5:2018(E)

Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General requirements . 2
4.1 Compliance . 2
4.2 Classification . 2
4.3 Position of heat sensitive elements . 3
4.4 Individual alarm indication . 3
4.5 Connection of ancillary devices . 3
4.6 Monitoring of detachable detectors . 3
4.7 Manufacturer's adjustments . 3
4.8 On-site adjustment of response behaviour . 4
4.9 Requirements for software controlled detectors . 4
4.9.1 General. 4
4.9.2 Software design. 4
4.9.3 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 Operating conditions for tests . 5
5.1.3 Mounting arrangements . 5
5.1.4 Tolerances . 5
5.1.5 Measurement of response time . 5
5.1.6 Provision for tests . 6
5.1.7 Test schedule . 6
5.2 Directional dependence . 8
5.2.1 Object . 8
5.2.2 Test procedure . 8
5.2.3 Requirements . 8
5.3 Static response temperature . 8
5.3.1 Object . 8
5.3.2 Test procedure . 9
5.3.3 Requirements . 9
5.4 Response times from typical application temperature . 9
5.4.1 Object . 9
5.4.2 Test procedure . 9
5.4.3 Requirements . 9
5.5 Response times from 25 °C.10
5.5.1 Object .10
5.5.2 Test procedure .10
5.5.3 Requirements .10
5.6 Response times from high ambient temperature (Dry heat operational) .10
5.6.1 Object .10
5.6.2 Test procedure .10
5.6.3 Requirements .10
5.7 Variation in supply parameters .11
5.7.1 Object .11
5.7.2 Test procedure .11
5.7.3 Requirements .11
5.8 Reproducibility .11
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ISO 7240-5:2018(E)

5.8.1 Object .11
5.8.2 Test procedure .11
5.8.3 Requirements .11
5.9 Cold (operational) .11
5.9.1 Object .11
5.9.2 Test procedure .12
5.9.3 Requirements .12
5.10 Dry heat (endurance) .12
5.10.1 Object .12
5.10.2 Test procedure .13
5.10.3 Requirements .13
5.11 Damp heat, cyclic (operational) .13
5.11.1 Object .13
5.11.2 Test procedure .14
5.11.3 Requirements .14
5.12 Damp heat, steady state (endurance) .15
5.12.1 Object .15
5.12.2 Test procedure .15
5.12.3 Requirements .15
5.13 Sulphur dioxide SO corrosion (endurance) .16
2
5.13.1 Object .16
5.13.2 Test procedure .16
5.13.3 Requirements .16
5.14 Shock (operational) .17
5.14.1 Object .17
5.14.2 Test procedure .17
5.14.3 Requirements .17
5.15 Impact (operational) .18
5.15.1 Object .18
5.15.2 Test procedure .18
5.15.3 Requirements .19
5.16 Vibration, sinusoidal, (operational) .19
5.16.1 Object .19
5.16.2 Test procedure .19
5.16.3 Requirements .20
5.17 Vibration, sinusoidal (endurance) .20
5.17.1 Object .20
5.17.2 Test procedure .20
5.17.3 Requirements .21
5.18 Electromagnetic Compatibility (EMC), Immunity tests (operational) .21
5.18.1 Test procedure .21
5.18.2 Requirements .21
5.19 Test for suffix S detectors .22
5.19.1 Object .22
5.19.2 Test procedure .22
5.19.3 Requirements .23
5.20 Additional test for suffix R detector .23
5.20.1 Object .23
5.20.2 Test procedure .23
5.20.3 Requirements .24
6 Test report .24
7 Marking .24
8 Data .25
8.1 Hardware documentation .25
8.2 Software documentation .25
Annex A (normative) Heat tunnel for response time and response temperature measurements .27
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ISO 7240-5:2018(E)

Annex B (informative) Information concerning the construction of the heat tunnel .28
Annex C (informative) Derivation of upper and lower limits of response times .31
Annex D (informative) Apparatus for impact test .34
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ISO 7240-5:2018(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
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 voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
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 7240-5:2012), which has been technically
revised.
A list of all parts in the ISO 7240 series, published under the general title Fire detection and fire alarm
systems, can be found on the ISO website.
This edition includes the following significant changes with respect to the previous edition:
— in 5.18 (electromagnetic compatibility immunity tests), EN 50130-4 has been replaced by IEC 62599-2;
— marking has been moved to a new Clause 7;
— data and software requirements have been moved to a new Clause 8.
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ISO 7240-5:2018(E)

Introduction
A fire detection and alarm system is required to function satisfactorily not only in the event of a fire,
but also during and after exposure to conditions likely to be met in practice such as corrosion, vibration,
direct impact, indirect shock and electromagnetic interference. Some tests specified are intended to
assess the performance of the heat detectors under such conditions.
The performance of heat detectors is assessed from the results obtained in specific tests. This document
is not intended to place any other restrictions on the design and construction of such detectors.
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INTERNATIONAL STANDARD ISO 7240-5:2018(E)
Fire detection and fire alarm systems —
Part 5:
Point type heat detectors
1 Scope
This document specifies the requirements, test methods and performance criteria for point type heat
detectors for use in fire detection and fire alarm systems for buildings (see ISO 7240-1).
For other types of heat detector, or for detectors intended for use in other environments, this document
can be used for guidance only. Heat detectors with special characteristics and developed for specific
risks are not covered by this document.
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, 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 60068-2-30, Environmental testing — Part 2-30: Tests. Test Db and guidance: Damp heat, cyclic
(12 + 12-hour cycle)
IEC 60068-2-42, Environmental testing — Part 2-42: Tests —Test Kc: Sulphur dioxide test for contacts and
connections
IEC 60068-2-78, Environmental testing — Part 2-78: Tests — Test Cab: Damp heat, steady state
IEC 62599-2, Alarm systems — Part 2: Electromagnetic compatibility — Immunity requirements for
components of fire and security alarm systems
3 Terms and definitions
For the purposes of this document, the terms, definitions and abbreviated terms in ISO 7240-1 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https: //www .electropedia .org/
— ISO Online browsing platform: available at https: //www .iso .org/obp
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ISO 7240-5:2018(E)

3.1
typical application temperature
temperature that an installed detector may be expected to experience for long periods of time in the
absence of a fire condition
Note 1 to entry: This temperature is deemed to be 29 °C below the minimum static response temperature,
according to the class marked on the detector, as specified in Table 1.
3.2
maximum application temperature
maximum temperature that an installed detector may be expected to experience, even for short periods
of time, in the absence of a fire condition
Note 1 to entry: This temperature is deemed to be 4 °C below the minimum static response temperature,
according to the class marked on the detector, as specified in Table 1.
3.3
static response temperature
temperature at which the detector would produce an alarm signal if subjected to a vanishingly small
rate of rise of temperature
Note 1 to entry: Rates of rise of temperature of approximately 0,2 K/min are normally found to be suitable for
measuring this, however lower rates may be required in some instances (see 5.3).
4 General requirements
4.1 Compliance
In order to comply with this document the detector shall meet the requirements of:
a) Clause 4, which shall be verified by visual inspection or engineering assessment, shall be tested as
described in Clause 5 and shall meet the requirements of the tests.
b) Clauses 7 and 8, which shall be verified by visual inspection.
4.2 Classification
4.2.1 Detectors shall conform to one or more of the following classes: A1, A2, B, C, D, E, F or G according
to the requirements of the tests specified in Clause 5 (see Table 1).
Table 1 — Detector classification temperatures
Detector Typical Maximum Minimum Maximum
class application application static response static response
temperature temperature temperature temperature
°C °C °C °C
A1 25 50 54 65
A2 25 50 54 70
B 40 65 69 85
C 55 80 84 100
D 70 95 99 11
...