ISO 7240-3:2010
(Main)Fire detection and alarm systems — Part 3: Audible alarm devices
Fire detection and alarm systems — Part 3: Audible alarm devices
ISO 7240-3:2010 specifies the requirements, test methods and performance criteria for audible alarm devices intended to signal an audible warning of fire between a detection and alarm system and the occupants of a building. It is intended to cover only those devices which derive their operating power by means of a physical electrical connection to an external source such as a fire alarm system. ISO 7240-3:2010 is also intended to cover audible alarm devices capable of giving voice messages by the application of specific requirements, tests and performance criteria. It specifies fire alarm audible alarm devices for two types of application environment, type A for indoor use and type B for outdoor use.
Systèmes de détection et d'alarme d'incendie — Partie 3: Dispositifs d'alarme sonores
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 7240-3
First edition
2010-12-15
Fire detection and alarm systems —
Part 3:
Audible alarm devices
Systèmes de détection et d'alarme d'incendie —
Partie 3: Dispositifs d'alarme sonores
Reference number
ISO 7240-3:2010(E)
©
ISO 2010
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ISO 7240-3:2010(E)
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ii © ISO 2010 – All rights reserved
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ISO 7240-3:2010(E)
Contents Page
Foreword .iv
Introduction.vi
1 Scope.1
2 Normative references.1
3 Terms, definitions and abbreviated terms.2
3.1 Terms and definitions .2
3.2 Abbreviated terms.3
4 Requirements.3
4.1 Compliance .3
4.2 Sound pressure level .3
4.3 Frequency and sound pattern.4
4.4 Audible alarm devices (a.a.d.s) with voice .4
4.5 Synchronization — Optional function.4
4.6 Construction .5
4.7 On-site adjustment of the mode of operation.5
4.8 Durability .6
4.9 Marking and data.6
4.10 Requirements for software-controlled a.a.d.s.7
5 Tests .8
5.1 General .8
5.2 Reproducibility .11
5.3 Operational performance.11
5.4 Durability .12
5.5 Dry heat (operational) .12
5.6 Dry heat (endurance).13
5.7 Cold (operational).14
5.8 Damp heat, cyclic (operational) .15
5.9 Damp heat, steady state (endurance).16
5.10 Damp heat, cyclic (endurance) .16
5.11 Sulfur dioxide (SO ) corrosion (endurance).17
2
5.12 Shock (operational).18
5.13 Impact (operational) .19
5.14 Vibration, sinusoidal (operational) .20
5.15 Vibration, sinusoidal (endurance) .21
5.16 Electromagnetic compatibility (EMC), immunity (operational).21
5.17 Enclosure protection.23
5.18 Operational performance for a.a.d.s with voice .24
5.19 Sequence timing for a.a.d.s with voice .24
5.20 Synchronization (optional) .25
6 Test report.26
Annex A (normative) Sound pressure level test for a.a.d.28
Annex B (normative) Comparative sound pressure level test during environmental conditioning .32
Annex C (informative) Comparison of flammability test requirements in various standards .37
Bibliography.39
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ISO 7240-3:2010(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 7240-3 was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire fighting,
Subcommittee SC 3, Fire detection and alarm systems.
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 using electro-chemical cells
⎯ Part 7: Point-type smoke detectors using scattered light, transmitted light or ionization
⎯ Part 8: Carbon monoxide fire detectors using an electro-chemical cell in combination with a heat sensor
⎯ Part 9: Test fires for fire detectors (Technical Specification)
⎯ Part 10: Point-type flame detectors
⎯ Part 11: Manual call points
⎯ Part 12: Line type smoke detectors using a transmitted optical beam
⎯ Part 13: Compatibility assessment of system components
⎯ Part 14: Guidelines for drafting codes of practice for design, installation and use of fire detection and fire
alarm systems in and around buildings (Technical Report)
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ISO 7240-3:2010(E)
⎯ Part 15: Point type fire detectors using scattered light, transmitted light or ionization sensors in
combination with a heat sensor
⎯ Part 16: Sound system control and indicating equipment
⎯ Part 17: Short-circuit isolators
⎯ Part 18: Input/output devices
⎯ Part 19: Design, installation, commissioning and service of sound systems for emergency purposes
⎯ Part 20: Aspirating smoke detectors
⎯ Part 21: Routing equipment
⎯ Part 22: Smoke-detection equipment for ducts
1)
⎯ Part 23: Visual alarm devices
⎯ Part 24: Sound-system loudspeakers
⎯ Part 25: Components using radio transmission paths
⎯ Part 27: Point-type fire detectors using a scattered-light, transmitted-light or ionization smoke sensor, an
electrochemical-cell carbon-monoxide sensor and a heat sensor
⎯ Part 28: Fire protection control equipment
1) To be published.
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ISO 7240-3:2010(E)
Introduction
In a fire detection and alarm system, the purpose of the audible alarm devices is to warn person(s) within, or
in the vicinity of, a building of the occurrence of a fire emergency situation in order to enable such a person(s)
to take appropriate measures.
Audible alarm devices using voice messages are also for warning the occupants of a building of the
occurrence of a fire risk. These use a combination of an attention-drawing signal and dedicated voice
message(s). Additional requirements, test methods and performance criteria specific to audible alarm devices
with voice are also incorporated in this International Standard.
Attention is drawn to ISO 8201, which specifies the temporal pattern and the required sound pressure level of
an audible emergency evacuation signal.
This part of ISO 7240 recognizes that the exact nature of the sound requirements, i.e. its frequency range,
temporal pattern and output level, will vary according to the nature of the installation, the type of risk present
and appropriate measures to be taken, the type of signals used by other non-emergency alarms (see for
example ISO 7731) and national differences in custom and practice. The resulting standard specifies,
therefore, a common method for testing of the operational performance of audible alarm devices against the
specification declared by the manufacturer, rather than imposing common requirements.
This part of ISO 7240 gives common requirements for the construction and robustness of audible alarm
devices, as well as for their performance under climatic, mechanical and electrical interference conditions
which are likely to occur in the service environment. Audible alarm devices have been classified in either an
indoor or an outdoor application environment category.
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INTERNATIONAL STANDARD ISO 7240-3:2010(E)
Fire detection and alarm systems —
Part 3:
Audible alarm devices
1 Scope
This part of ISO 7240 specifies the requirements, test methods and performance criteria for audible alarm
devices intended to signal an audible warning of fire between a detection and alarm system and the
occupants of a building. It is intended to cover only those devices which derive their operating power by
means of a physical electrical connection to an external source such as a fire alarm system.
This part of ISO 7240 is also intended to cover audible alarm devices capable of giving voice messages by the
application of specific requirements, tests and performance criteria.
This part of ISO 7240 specifies fire alarm audible alarm devices for two types of application environment,
type A for indoor use and type B for outdoor use.
This part of ISO 7240 is not intended to cover:
a) loudspeaker-type devices primarily intended for emitting emergency voice messages that are generated
from an external audio source;
b) supervisory audible alarm devices, e.g. within the control and indicating equipment.
2 Normative references
The following referenced documents are indispensable for the application 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 7240-1, Fire detection and alarm systems — Part 1: General and definitions
ISO 8201, Acoustics — Audible emergency evacuation signal
IEC 60068-1:1988/Corr. 1:1988/A1:1992, Environmental testing — Part 1: General and guidance
IEC 60068-2-1:2007, Environmental testing — Part 2-1: Tests — Test A: Cold
IEC 60068-2-2:2007, Environmental testing — Part 2-2: Tests — Test B: Dry heat
IEC 60068-2-6:2007, Environmental testing — Part 2-6: Tests — Test Fc: Vibration (sinusoidal)
IEC 60068-2-27:2008, Environmental testing — Part 2-27: Tests — Test Ea and guidance: Shock
IEC 60068-2-30:2005, Environmental testing — Part 2-30: Tests — Test Db: Damp heat, cyclic (12 h + 12 h
cycle)
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ISO 7240-3:2010(E)
IEC 60068-2-42:2003, Environmental testing — Part 2-42: Tests — Test Kc: Sulphur dioxide test for contacts
and connections
IEC 60068-2-75:1997, Environmental testing — Part 2-75: Tests — Test Eh: Hammer tests
IEC 60068-2-78:2001, Environmental testing — Part 2-78: Tests — Test Cab: Damp heat, steady state
IEC 60529:2001/Corr. 1:2003/Corr. 2:2007, Degrees of protection provided by enclosures (IP code)
IEC 60695-11-10:2003, Fire hazard testing — Part 11-10: Test flames — 50 W horizontal and vertical flame
test methods
IEC 60695-11-20:2003, Fire hazard testing — Part 11-20: Test flames — 500 W flame test methods
IEC 61672-1:2002, Electroacoustics — Sound level meters — Part 1: Specifications
EN 50130-4:1995/A1:1998/A2:2003, Alarm systems — Part 4: Electromagnetic compatibility — Product family
standard: Immunity requirements for components of fire, intruder and social alarm systems
3 Terms, definitions and abbreviated terms
For the purposes of this document, the terms, definitions and abbreviated terms given in ISO 7240-1 and the
following apply.
3.1 Terms and definitions
3.1.1
A-weighted sound pressure level
sound pressure, which is 20 times the logarithm to base ten of the ratio of the A-weighted sound pressure to
the reference pressure of 20 μPa at 1 kHz
NOTE The A-weighting characteristics are given in IEC 61672-1.
3.1.2
audible alarm device
a.a.d.
device intended to signal an audible warning of fire between a fire detection and alarm system and the
occupants of a building
NOTE Audible alarm devices are sometimes referred to as “fire alarm sounders”.
3.1.3
mode (of operation)
one of a possible number of predefined sounds of the audible alarm device which can be selected by means
specified by the manufacturer
EXAMPLE Sound patterns, sound pressure levels.
3.1.4
reference point
point representing the origin of the sound within or on the surface of the audible alarm device as specified by
the manufacturer
NOTE The reference point is used in Annex A.
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ISO 7240-3:2010(E)
3.1.5
sound pattern
predefined acoustic alarm signal
NOTE Sound pattern is also often referred to as “tone”.
3.1.6
supervisory sounder
audible device on a piece of equipment used for drawing attention to a change of status
NOTE Supervisory sounders are often mounted within the fire detection and fire alarm control and indicating
equipment.
3.1.7
type A a.a.d.
device primarily intended for indoor applications
NOTE Type A a.a.d. may be suitable for some protected outdoor situations.
3.1.8
type B a.a.d.
device primarily intended for outdoor applications
NOTE Type B a.a.d. may be more suitable than type A a.a.d. for some indoor situations where high temperature or
humidity or both are present.
3.1.9
volume control
means for adjusting sound pressure level
3.2 Abbreviated terms
a.a.d. audible alarm device
AC alternating current
DC direct current
RMS root mean square
4 Requirements
4.1 Compliance
In order to comply with this part of ISO 7240, an a.a.d. shall meet the requirements of this clause 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.
4.2 Sound pressure level
This part of ISO 7240 requires that the manufacturer declare sound pressure levels in the data required by
4.9.2. The manufacturer may declare different sound pressure levels for operation under different conditions,
e.g. when operating on different voltage ranges or with different sound patterns. If this is the case, the sound
pressure level of each specimen shall be measured under each mode of operation (see 5.3).
When tested in accordance with 5.3, the a.a.d. shall produce A-weighted sound pressure levels of not less
than 65 dB in one direction at a distance of 1 m.
NOTE A maximum sound pressure level received by occupants can be specified by national regulations.
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ISO 7240-3:2010(E)
4.3 Frequency and sound pattern
This part of ISO 7240 covers a.a.d.s which produce different frequencies and sound patterns and, therefore,
does not specify a minimum and maximum frequency or specific sound pattern. However, the main sound
frequency(ies), frequency range(s) and sound pattern(s) shall be declared in the data required in 4.9.2.
NOTE The sound patterns and frequencies required can vary in different countries. Reference needs to be made to
local regulations. ISO 8201 specifies a standard international evacuation signal.
4.4 Audible alarm devices (a.a.d.s) with voice
4.4.1 A.a.d.s using voice messages shall be capable of producing an audible warning signal and a voice
message or messages.
4.4.2 Representative messages related to fire safety shall be declared by the manufacturer and shall be
considered by the testing authority. The message determined to be worst case shall be subject to
conformance assessment.
When selecting the worst-case message, message length, loudness and repetition timing should be
considered.
4.4.3 For messages that require immediate action, the warning signal and message sequence broadcast by
the device shall be within the following limits:
a) warning signal, lasting for 2 s to 10 s; followed by
b) silence, lasting for 0,25 s to 2 s; followed by
c) voice message; followed by
d) silence, lasting for 0,25 s to 5 s.
The time for each cycle shall not exceed 30 s.
The periods of silence may need to be longer than indicated in certain circumstances, for example in spaces
with long reverberation times, but shall not be such that the time between the start of each cycle exceeds 30 s.
For other messages, it is permitted to extend either or both the silence period after the voice message and the
period within which the message is repeated.
4.4.4 Access to the message recording function shall be restricted as specified in 4.6.4.
Persons trained in the proper use of microphones should be used to recording the messages. The recordings
should be made in a room with a controlled acoustic environment having an ambient A-weighted noise level
not greater than 30 dB and a reverberation time not greater than 0,5 s from 150 Hz to 10 kHz.
4.5 Synchronization — Optional function
To prevent acoustic interaction of a.a.d.s installed in close proximity, a.a.d.s shall have provision for
synchronizing warning signals and messages with that of other devices. Synchronization shall meet the
requirements of 5.20.4.
Power interruption used for synchronization purposes shall not adversely affect the warning signal or the voice
message.
NOTE Synchronization can be achieved by internal circuitry, the addition of a trigger wire connected between devices
or by other means as defined by the manufacturer.
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ISO 7240-3:2010(E)
4.6 Construction
4.6.1 Provision for external conductors
4.6.1.1 The a.a.d. shall provide space within its enclosure for entry and termination of external
conductors. Entry holes for conductors or cables shall be provided or the location where such holes can be
made shall be indicated by providing a template or some other suitable means.
4.6.1.2 Terminals for connecting external conductors shall be designed so that the conductors are
clamped between metal surfaces without being damaged.
4.6.2 Materials
The a.a.d. shall be constructed of material(s) capable of withstanding the tests described in 5.2 to 5.17. In
addition, the material(s) of plastic enclosures shall meet the following flammability requirements:
a) IEC 60695-11-10 Class V-2 or HB75 for devices operating from a voltage source less than or equal to
30 V RMS, or 42,4 V DC and consuming less than 15 W of power;
b) IEC 60695-11-20 Class 5VB for devices operating from a voltage source greater than 30 V RMS, or
42,4 V DC and consuming more than 15 W of power.
NOTE Verification of conformance to 4.6.2 a) and 4.6.2 b) can be carried out by examination of a certificate of
conformity or equivalent (see Annex C).
4.6.3 Ingress protection
The degree of protection provided by the enclosure of the a.a.d. shall meet or exceed the following
requirements:
a) type A – IP21C of IEC 60529.
b) type B – IP33C of IEC 60529.
4.6.4 Access
Means shall be provided (e.g. special tool, codes, hidden screws, seals, etc.) to limit access for removal of
parts or the whole device and to make adjustments to the mode of operation.
NOTE The use of a special tool is intended to discourage unauthorized persons from easily accessing the equipment.
4.7 On-site adjustment of the mode of operation
If there is provision for on-site adjustment of the mode of operation of the a.a.d.:
a) for each setting at which the manufacturer claims compliance with this part of ISO 7240, the a.a.d. shall
comply with 4.6.4;
b) any setting(s) at which the manufacturer does not claim compliance with this part of ISO 7240, shall
comply with 4.6.4 and:
1) for volume controls, the limits of the compliant range of sound pressure levels shall be clearly marked
on the a.a.d. and shown in the associated data,
2) for sound pattern, the compliant setting(s) shall be clearly marked in the associated data.
NOTE These adjustments can be carried out at the a.a.d. or at the control and indicating equipment.
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ISO 7240-3:2010(E)
4.8 Durability
The a.a.d. shall be rated for at least 100 h of operation. No limitation by the manufacturer on duty factor or
maximum on-time shall prevent the device from operating the 1 h “on” 1 h “off” cycle required by the test
procedure described in 5.4.
This requirement does not apply to the capacity of batteries which may be used within a.a.d.s as a means of
local storage of operating power. The capacity and charging requirements of such batteries need to meet the
requirements of the system.
4.9 Marking and data
4.9.1 Marking
Each a.a.d. shall be clearly marked with the following information:
a) number of this part of ISO 7240 (i.e. ISO 7240-3:2010);
b) environmental type, [i.e. type A or type B (see Clause 3)];
c) name or trademark of the manufacturer or supplier;
d) manufacturer or supplier model designation (type or number);
e) terminal designations;
f) rated supply voltages or voltage ranges (AC or DC);
g) mark(s) or code(s) (for example, serial number or batch code) by which the manufacturer can identify, at
least, the date or batch and place of manufacture, and the version number(s) of any software contained
within the device.
Where any marking on the device uses symbols or abbreviations not in common use then these shall be
explained in the data supplied with the device.
The marking need not be discernible when the device is installed and ready for use but shall be visible during
installation and shall be accessible during maintenance.
The markings shall not be placed on screws or other easily removable parts.
4.9.2 Data
The information required in 4.9.1, together with the following, shall be supplied with the device, or shall be
given in a data sheet or technical manual identified on, or with each device:
a) operating voltage range(s);
b) maximum or average current consumption, where applicable;
For a.a.d.s used in an addressable system, it may not be relevant to declare the current consumption as
system configuration and the loading of addressable circuit(s) is configured at the control and indicating
equipment.
c) for all specified modes of operation for which compliance with this part of ISO 7240 is claimed, the
minimum A-weighted sound pressure level in dB at a distance of 1 m from the reference point of the
device for the following directions of radiation:
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ISO 7240-3:2010(E)
1) surface-mounted device: at 30° intervals from 15° to 165° through a semi-circular arc in front of the
device and centered at the intersection of its normal mounting surface and its principal axis, for two
perpendicular planes corresponding to the horizontal and vertical planes of the device in its designed
position (see Annex A, Figure A.2),
2) pole-mounted device: at 30° intervals through a 360° circle centered at the intersection of the
horizontal plane containing its principal axis and the vertical line through the geometric centre of the
sound diffusing assembly, for two perpendicular planes corresponding to the horizontal and vertical
planes of the device in its designed position (see Annex A, Figure A.3);
d) sound pattern(s) that comply with this part of ISO 7240 and, where applicable, sound pattern(s) that
comply with national standards;
e) IP code to IEC 60529;
f) any other information necessary to allow correct installation, operation and maintenance of the device.
4.10 Requirements for software-controlled a.a.d.s
4.10.1 General
For a.a.d.s which rely on software control in order to fulfil the requirements of this part of ISO 7240, the
requirements of 4.10.2, 4.10.3 and 4.10.4 shall be met.
4.10.2 Software documentation
4.10.2.1 The manufacturer shall submit documentation which gives an overview of the software design.
This documentation shall be in sufficient detail for the design to be inspected for compliance with this part of
ISO 7240 and shall include at least the following:
a) a functional description of the main program flow (e.g. as a flow diagram or structogram), including a brief
descriptio
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