ISO 7240-3:2010

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 2010
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©  ISO 2010
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ii © ISO 2010 – All rights reserved

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
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

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)
iv © ISO 2010 – All rights reserved

⎯ 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.
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.

vi © ISO 2010 – All rights reserved

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)
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.
2 © ISO 2010 – All rights reserved

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.
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.
4 © ISO 2010 – All rights reserved

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.
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:
6 © ISO 2010 – All rights reserved

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
description of the following:
1) the modules and the functions that they perform,
2) the way in which the modules interact,
3) the overall hierarchy of the program,
4) the way in which the software interacts with the hardware of the a.a.d.,
5) the way in which the modules are called, including any interrupt processing;
b) a description of which areas of memory are used for the various purposes (e.g. the program, site-specific
data and running data);
c) a designation by which the software and its version can be uniquely identified.
4.10.2.2 The manufacturer shall prepare and maintain detailed design documentation. This shall be
available for inspection in a manner that respects the manufacturers' rights for confidentiality. It shall comprise
at least the following:
a) an overview of the whole system configuration, including all software and hardware components;
b) a description of each module of the program, containing at least:
1) the name of the module,
2) a description of the tasks performed;
c) a description of the interfaces, including the type of data transfer, the valid data range and the checking
for valid data;
d) full source code listings, as hard copy or in machine-readable form (e.g. ASCII-code), including all global
and local variables, constants and labels used, and sufficient comment for the program flow to be
recognized;
e) details of any software tools used in the design and implementation phase (e.g. CASE-tools, compilers).
NOTE This detailed design documentation can be reviewed at the manufacturers' premises.
4.10.3 Software design
In order to ensure the reliability of the a.a.d., the following requirements for the software design shall apply:
a) the software shall have a modular structure;
b) the design of the interfaces for manually and automatically generated data shall not permit invalid data to
cause error in the program operation;
c) the software shall be designed to avoid the occurrence of deadlock of the program flow.
4.10.4 The storage of program and data
The program necessary to comply with this part of ISO 7240 and any preset data, such as manufacturer's
settings, shall be held in non-volatile memory. Writing to areas of memory containing this program and data
shall only be possible by the use of some special tool or code and shall not be possible during normal
operation of the a.a.d.
Site-specific data shall be held in memory which will retain data for at least two weeks without external power
to the a.a.d., unless provision is made for the automatic renewal of such data, following loss of power, within
1 h of power being restored.
5 Tests
5.1 General
5.1.1 Atmospheric conditions for tests
Unless otherwise stated in a test procedure, carry out the testing after the test specimen has been allowed to
stabilize in the standard atmospheric conditions for testing as specified in IEC 60068-1 as follows:
⎯ temperature: (15 to 35) °C;
⎯ relative humidity: (25 to 75) %;
⎯ air pressure: (86 to 106) kPa.
The temperature and humidity shall be substantially constant for each environmental test where the standard
atmospheric conditions are applied.
8 © ISO 2010 – All rights reserved

5.1.2 Operating conditions for tests
If a test method requires a specimen to be sounding, then the specimen shall be connected to suitable power
supply equipment as specified in the data provided by the manufacturer. Where, in order to be sounding, a
specimen also requires the application of a control signal or signals, this shall be provided in accordance with
the manufacturer's specification.
If a test method requires a specimen to be in the quiescent state, then the specimen shall not be supplied with
power unless it is an a.a.d. of the type which has electronic circuits for analysing control signals and triggering
the sound operation. In this case the specimen shall be connected to suitable power supply and control
equipment, as specified in the data provided by the manufacturer and the control signals shall be arranged so
that the specimen is in a non-sounding state.
Unless otherwise specified in the test procedure, the supply parameters applied to the specimen shall be set
within the manufacturer's specified range(s) and shall remain constant throughout the tests. The value chosen
for each parameter shall be the nominal value, or the mean of the specified range.
If the manufacturer has declared different sound pressure levels for operation under different conditions
(see 4.9.2), then, unless otherwise specified by the test procedure, the tests shall be conducted under one
selected mode of operation only. Selection of the mode of operation shall be made with the aim to use the one
which consumes the most power. This will normally be the most continuous or the loudest mode.
NOTE All modes of operation and all voltage ranges are tested in 5.3.
5.1.3 Mounting arrangements
Unless otherwise specified, the specimen shall be mounted by its normal means of attachment in accordance
with the manufacturer's instructions on a flat rigid backing board. If these instructions describe more than one
method of mounting then the method considered to be most unfavourable shall be chosen for each test.
The detailed mounting arrangements are given in Annex A or Annex B for the different sound pressure level
tests used.
5.1.4 Tolerances
Unless otherwise stated, the tolerances for the environmental test parameters shall be as given in the basic
reference standards for the test (e.g. the relevant part of IEC 60068).
If a specific tolerance or deviation limit is not specified in a requirement or test procedure, then a tolerance of
±5 % shall be applied.
5.1.5 Provision for tests
The following shall be provided for testing compliance with this part of ISO 7240:
a) eight specimens of type A or ten specimens of type B a.a.d.s with any mounting, bases, boxes or
accessories, etc.;
b) any equipment, such as control and indicating equipment, as may be necessary for the correct operation
of the device in accordance with the manufacturer's specification;
c) the data required in 4.9.2.
The specimens submitted shall be deemed representative of the manufacturer's normal production with
regard to their construction and settings.
NOTE The details of the power supply equipment used or the equipment used for generating the control signal(s) or
both shall be given in the test report.
5.1.6 Test schedule
The specimens shall be tested and inspected according to the schedule given in Table 1.
All the specimens shall be first submitted to the reproducibility test described in 5.2. On completion of the
reproducibility test, the specimen with the lowest loud sound pressure level shall be numbered 1 and the rest
shall be arbitrarily numbered from 2 to 8 for type A or 2 to 10 for type B.
Unless otherwise required by the test procedure, the mode of operation selected for conducting the
reproducibility test shall be used for the other tests.
Where, after one of the tests specified in 5.5 to 5.16, the sound pressure level of the specimen differs from
that measured during the reproducibility test by more than 6 dB, a new specimen shall be used for the next
test on the schedule for that specimen. The sound pressure level shall be first measured as specified in 5.2.
The tests on an individual specimen may be carried out in any order except that the reproducibility test (5.2)
shall be performed first on all specimens and the tests on specimens 1 and 2 shall be carried out in the order
listed (i.e. 5.20 last).
Table 1 — Test schedule
Specimen number(s)
Test Subclause
Type A Type B
Reproducibility 5.2 all specimens all specimens
a
Operational performance 5.3 1 1
Durability 5.4 2 2
Dry heat (operational) 5.5 3 3
Dry heat (endurance) 5.6 — 9
Cold (operational) 5.7 3 3
Damp heat, cyclic (operational) 5.8 3 3
Damp heat, steady state (endurance) 5.9 3 3
Damp heat, cyclic (endurance) 5.10 — 10
SO corrosion (endurance) 5.11 4 4
Shock (operational) 5.12 5 5
Impact (operational) 5.13 6 6
Vibration, sinusoidal (operational) 5.14 7 7
Vibration, sinusoidal (endurance) 5.15 7 7
b
Electromagnetic compatibility (EMC), immunity (operational) 5.16
Electrostatic discharge 8 8
Radiated electromagnetic fields 8 8
Conducted disturbance induced by electromagnetic fields 8 8
Fast transient bursts 8 8
Slow high-energy voltage surges 8 8
Enclosure protection 5.17 1, 2 1, 2
Operational performance, additional test for a.a.d.s with voice 5.18 1 1
Sequence timing for a.a.d.s with voice 5.19 2 2
Synchronization (optional) 5.20 1, 2 1, 2
a
For voice a.a.d.s, only the warning signal shall be measured.
b
The tests specified in 5.16 are not required for a.a.d.s which do not rely on active electronic components for their operation.

10 © ISO 2010 – All rights reserved

5.1.7 Test report
The test results shall be reported in accordance with Clause 6.
5.2 Reproducibility
5.2.1 Object of the test
The object of the test is to show that the sound output of the a.a.d. does not vary unduly from specimen to
specimen and to establish sound output data for comparison with the sound output measured during or after
the environmental tests.
5.2.2 Test procedure
Measure the A-weighted sound pressure level of all the specimens as described in Annex B.
Record the measurement in dB for each specimen.
Designate the maximum sound pressure level L , and the minimum sound pressure level L .
max min
5.2.3 Requirements
The difference between L and L shall not be greater than 6 dB.
max min
5.3 Operational performance
5.3.1 Object of the test
The object of the test is to show that the sound pressure levels declared by the manufacturer can be achieved
within the specified range(s) of supply parameters (e.g. voltage) and are not unduly dependent on these
parameters.
5.3.2 Test procedure
For each mode of operation declared by the manufacturer, measure the sound pressure level of the specimen
in free field conditions using the test method described in Annex A with the supply parameters, first the
maximum and then the minimum of the specified range(s) [see 4.9.2 a) and b)].
For each mode of operation, designate the maximum sound pressure level L , and the minimum sound
max
pressure level L .
min
5.3.3 Requirements
For each mode of operation:
a) the A-weighted sound pressure level shall be not less than 65 dB at 1 m in at least one direction;
b) the sound pressure level measured at each of the specified angles shall not be less than that declared by
the manufacturer [see 4.9.2 d)];
c) the difference between L and L shall not be greater than 6 dB.
max min
5.4 Durability
5.4.1 Object of the test
The object of the test is to show that the sound output of the specimen does not change significantly after
prolonged operation.
5.4.2 Test procedure
Subject the specimen to the following durability cycle 100 times: operate the specimen for 1 h at the maximum
supply parameters declared by the manufacturer (see 4.9.2) and then pause the operating condition for 1 h.
Measure the sound pressure level as described in Annex B within 1 h of the final period of operation.
5.4.3 Requirements
The sound pressure level shall be less than 6 dB from that measured for the same specimen in the
reproducibility test (see 5.2).
5.5 Dry heat (operational)
5.5.1 Object of the test
The object of the test is to demonstrate the ability of the specimen to function correctly at high ambient
temperatures appropriate to the anticipated service environment.
5.5.2 Test procedure and apparatus
5.5.2.1 General
Use the test apparatus and perform the procedure as specified in IEC 60068-2-2, Test Bb for non-heat
dissipating specimens or Test Bd for heat dissipating specimens, except that the test shall be conducted in a
reverberation chamber as specified in Annex B and in 5.5.2.2 to 5.5.2.5.
5.5.2.2 State of specimen during conditioning
Mount the specimen in a reverberation test chamber as specified in Annex B. Maintain the specimen in the
quiescent state during the conditioning period, except during the last hour, when it shall be sounding (see
5.1.2).
5.5.2.3 Conditioning
Apply the following conditioning:
⎯ temperature: (55 ± 2) °C for type A or (70 ± 2) °C for type B;
⎯ duration: 16 h.
NOTE Test Bb specifies rates of change of temperature of <1 °C/min for the transitions to and from the conditioning
temperature.
5.5.2.4 Measurements during conditioning
Except during the final 15 min of conditioning, monitor those devices requiring power during the quiescent
state (see 5.1.2) for false operation and fault signals during the conditioning period.
During the last 15 min of the conditioning, measure the sound pressure level as specified in Annex B.
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5.5.2.5 Final measurements
After the recovery period specified in IEC 60068-2-2, measure the sound pressure level of the specimen as
specified in Annex B.
5.5.3 Requirements
No false operation or fault signals shall be given during the transition to or the period at the conditioning
temperature.
The specimen shall operate correctly during the conditioning period.
The sound pressure level measured during the conditioning period and after the recovery period shall be less
than 6 dB from that measured for the same specimen in the reproducibility test (see 5.2).
If the a.a.d. is combined with a heat detector which could operate at the conditioning temperature, then the
response of the heat detector may be disabled or ignored during the test.
5.6 Dry heat (endurance)
5.6.1 Object of the test
The object of the test is to demonstrate the ability of the type B specimen to withstand long-term ageing
effects.
5.6.2 Test procedure
5.6.2.1 General
Use the test apparatus and perform the procedure as specified in IEC 60068-2-2, Test Bb for non-heat
dissipating specimens or Test Bd for heat dissipating specimens, and in 5.6.2.2 to 5.6.2.4.
5.6.2.2 State of the specimen during conditioning
Do not supply power to the specimen during the conditioning.
5.6.2.3 Conditioning
Apply the following conditioning:
⎯ temperature: (70 ± 2) °C for type B;
⎯ duration: 21 d.
NOTE Test Bb specifies rates of change of temperature of <1 °C/min for the transitions to and from the conditioning
temperature.
5.6.2.4 Final measurements
After the recovery pe
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