EN 54-3:2014

SLOVENSKI STANDARD
01-september-2014
1DGRPHãþD
SIST EN 54-3:2001
SIST EN 54-3:2001/A1:2002
SIST EN 54-3:2001/A2:2006
6LVWHPL]DRGNULYDQMHLQMDYOMDQMHSRåDUDWHUDODUPLUDQMHGHO1DSUDYH]D
DODUPLUDQMH=YRþQHQDSUDYH
Fire detection and fire alarm systems - Part 3: Fire alarm devices - Sounders
Brandmeldeanlagen - Teil 3: Feueralarmeinrichtungen Akustische Signalgeber
Systèmes de détection et d'alarme incendie - Partie 3: Dispositifs sonores d'alarme feu
Ta slovenski standard je istoveten z: EN 54-3:2014
ICS:
13.220.20 3RåDUQD]DãþLWD Fire protection
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 54-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2014
ICS 13.220.20 Supersedes EN 54-3:2001
English Version
Fire detection and fire alarm systems - Part 3: Fire alarm devices
- Sounders
Systèmes de détection et d'alarme incendie - Partie 3: Brandmeldeanlagen - Teil 3: Feueralarmeinrichtungen
Dispositifs sonores d'alarme feu Akustische Signalgeber
This European Standard was approved by CEN on 8 May 2014.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 54-3:2014 E
worldwide for CEN national Members.

Contents Page
Foreword .5
Introduction .7
1 Scope .8
2 Normative references .8
3 Terms, definitions and abbreviations .9
3.1 Definitions .9
3.2 Abbreviations . 11
4 Requirements . 11
4.1 Compliance . 11
4.2 Operational reliability . 11
4.2.1 Duration of operation . 11
4.2.2 Provision for external conductors . 11
4.2.3 Flammability of materials . 11
4.2.4 Enclosure protection . 12
4.2.5 Access . 12
4.2.6 Manufacturer's adjustment . 12
4.2.7 On-site adjustment of the operation mode . 12
4.2.8 Software controlled sounders . 13
4.3 Performance parameters under fire conditions . 14
4.3.1 Sound pressure level . 14
4.3.2 Frequencies and sound pattern . 14
4.3.3 Synchronisation . 14
4.3.4 Performance of voice sounders . 15
4.3.5 Voice sounders sequence timing . 15
4.4 Durability of performance parameters under fire conditions . 15
4.4.1 Temperature resistance . 15
4.4.2 Humidity resistance . 15
4.4.3 Shock and vibration resistance . 16
4.4.4 Corrosion resistance . 16
4.4.5 Electrical stability . 16
5 Testing, assessment and sampling methods . 16
5.1 General . 16
5.1.1 Atmospheric conditions for tests . 16
5.1.2 Operating conditions for tests . 17
5.1.3 Mounting arrangements . 17
5.1.4 Tolerances . 17
5.1.5 Provision for tests . 17
5.1.6 Test schedule . 18
5.1.7 Reproducibility . 19
5.2 Operational reliability . 20
5.2.1 Duration of operation . 20
5.2.2 Provision for external conductors . 20
5.2.3 Flammability of materials . 20
5.2.4 Enclosure protection . 21
5.2.5 Access . 22
5.2.6 Manufacturer’s adjustments . 22
5.2.7 On site adjustments of the operating mode . 22
5.2.8 Requirements for software controlled devices . 22
5.3 Performance parameters under fire conditions . 22
5.3.1 Sound pressure level . 22
5.3.2 Frequencies and sound patterns . 23
5.3.3 Synchronisation . 23
5.3.4 Performance of voice sounders . 24
5.3.5 Voice sounder sequence timing . 25
5.4 Durability of performance parameters under fire conditions . 26
5.4.1 Heat resistance . 26
5.4.2 Humidity resistance . 29
5.4.3 Shock and vibration resistance . 31
5.4.4 Corrosion resistance, SO corrosion (endurance) . 35
5.4.5 Electrical stability . 36
6 Assessment and verification of constancy of performance (AVCP) . 37
6.1 General . 37
6.2 Type testing . 37
6.2.1 General . 37
6.2.2 Test samples, testing and compliance criteria . 38
6.2.3 Test reports . 38
6.3 Factory production control (FPC) . 38
6.3.1 General . 38
6.3.2 Requirements . 39
6.3.3 Product specific requirements . 41
6.3.4 Initial inspection of factory and FPC . 42
6.3.5 Continuous surveillance of FPC . 42
6.3.6 Procedure for modifications. 43
6.3.7 One-off products, pre-production products, (e.g. prototypes) and products produced in

very low quantities . 43
7 Classification and designation . 44
8 Marking, labelling and packaging . 44
Annex A (normative) Sound pressure level for fire alarm sounders . 45
A.1 General . 45
A.2 Mounting arrangements . 45
A.3 Instrumentation . 45
A.4 Background noise level . 45
A.5 Measurement of sound pressure level . 45
Annex B (normative) Comparative sound pressure level test during environmental conditioning . 49
B.1 General . 49
B.2 Test chamber . 49
B.2.1 Size . 49
B.2.2 Shape . 49
B.2.3 Rigidity. 50
B.2.4 Surface treatment . 50
B.3 Mounting arrangements . 50
B.4 Instrumentation . 50
B.5 Background noise level . 50
B.6 Test procedure . 50
B.6.1 Number and positioning of microphones . 50
B.6.2 Measurement of sound pressure level . 51
Annex C (informative) Data supplied with sounders . 54
Annex D (informative) Sound patterns used in some European countries . 55
D.1 Introduction . 55
D.2 Standards references . 55
D.3 Information on sound patterns . 56
D.3.1 Introduction . 56
D.3.2 ISO 8201 Evacuate signal . 56
D.3.3 DIN 33404-3 Unified emergency signal . 56
D.3.4 BS 5839-1 Evacuate signal . 57
D.3.5 BS 5839-1 Alert signal . 57
D.3.6 NF S32-001 Evacuate signal . 57
D.3.7 NEN 2575 Evacuate signal . 58
Annex E (informative) Comparison of flammability test requirements in various standards . 59
E.1 Introduction . 59
E.2 Relevant standards . 59
E.3 Vertical burning tests . 59
E.4 Horizontal burning tests . 60
E.4.1 ISO 1210, IEC 60695-11-10 and UL 94 . 60
E.4.2 ISO 10351, IEC 60695-11-20 and UL 94 . 61
Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU

Construction Products Regulation . 62
ZA.1 Scope and relevant characteristics . 62
ZA.2 Procedure for assessment and verification of constancy of performance (AVCP) of

sounders . 63
ZA.2.1 System of AVCP . 63
ZA.2.2 Declaration of performance (DoP) . 64
ZA.2.2.1 General . 64
ZA.2.2.2 Content . 64
ZA.2.2.3 Example of DoP . 65
ZA.3 CE marking and labelling . 68
Bibliography . 72

Foreword
This document (EN 54-3:2014) has been prepared by Technical Committee CEN/TC 72 “Fire detection and
fire alarm systems”, the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by January 2015, and conflicting national standards shall be withdrawn at
the latest by April 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 54-3:2001.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
EN 54-3 has been revised so as to align with the second answer of CEN/TC 72 to Mandate M/109. EN 54-3
includes new clauses and annexes as follows:
— Requirements for software controlled devices (5.2.8);
— Clause 6 Assessment and verification of constancy of performance (AVCP);
— Clause 7 Classification and designation;
— Clause 8 Marking, labelling and packaging;
— Annex C Data supplied with sounders;
— Annex D (informative) Sound patterns used in some European countries;
— Annex E (informative) Comparison of flammability test requirements in various standards.
The previous Annex C dealt with the requirements and test methods for voice sounders. The content of this
annex has been integrated in the main body of the standard, specifically under 4.3.3, 4.3.4, 4.3.5, 5.3.3. 5.3.4
and 5.3.5. In addition, Annex ZA has been revised to align with the Construction Products Regulation (CPR).
EN 54, Fire detection and fire alarm systems, consists of the following parts:
— Part 1: Introduction
— Part 2: Control and indicating equipment
— Part 3: Fire alarm devices – Sounders
— Part 4: Power supply equipment
— Part 5: Heat detectors – Point detectors
— Part 7: Smoke detectors – Point detectors using scattered light, transmitted light or ionization
— Part 10: Flame detector – Point detectors
— Part 11: Manual call points
— Part 12: Smoke detectors – Line detector using an optical light beam
— Part 13: Compatibility assessment of system components
— Part 14: Guidelines for planning, design, installation, commissioning, use and maintenance
— Part 15: Point detectors using a combination of detected phenomena
— Part 16: Voice alarm control and indicating equipment
— Part 17: Short circuit isolators
— Part 18: Input/output devices
— Part 20: Aspirating smoke detectors
— Part 21: Alarm transmission and fault warning routine equipment
— Part 22: Line-type heat detectors
— Part 23: Fire alarm devices – Visual alarms
— Part 24: Components of voice alarm systems – Loudspeakers
— Part 25: Components using radio links and system requirements
— Part 26: Carbon monoxide detectors – Point detectors
— Part 27: Duct smoke detectors
— Part 28: Non-resettable (digital) line type heat detectors
— Part 29: Multi-sensor fire detectors - Point detectors using a combination of smoke and heat sensors
— Part 30: Multi-sensor fire detectors - Point detectors using a combination of carbon monoxide and heat
sensors
— Part 31: Multi-sensor detector – Point detectors using a combination of smoke, carbon monoxide and
optionally heat sensors
— Part 32: Guidelines for the planning, design, installation, commissioning, use and maintenance of voice
alarm systems
NOTE This list includes standards that are in preparation and other standards may be added. For current status of
published standards refer to www.cen.eu.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Introduction
The purpose of a fire alarm sounder 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.
This European Standard 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, EN ISO 7731) and national differences in custom and practice. The resulting standard specifies,
therefore, a common method for the testing of the operational performance of sounders against the
specification declared by the manufacturer rather than imposing common requirements.
In some European countries, specific frequencies of sound and sound patterns are used. These may be given
in national codes or standards (see Annex D). Attention is drawn to national safety regulations which may
specify maximum safe sound pressure level received by occupants of a building.
Attention is also drawn to ISO 8201:1987, Acoustics – Audible emergency evacuation signal, the international
standard which specifies the temporal pattern and the required sound pressure level of an audible emergency
evacuation signal.
This European Standard gives common requirements for sounders as well as for their performance under
climatic, mechanical and electrical interference conditions which are likely to occur in the service environment.
This European Standard covers sounders for either an indoor or an outdoor application environment category.
In fire detection and fire alarm systems, voice sounders are used as alarm devices for warning the occupants
of a building of the occurrence of a fire risk, using a combination of an attention-drawing signal and dedicated
voice message(s). The requirements, test methods and performance criteria specified in this standard for
sounders are also applicable to voice sounders. Additional requirements, test methods and performance
criteria specific to voice sounders are also incorporated.
1 Scope
This European Standard specifies the requirements, test methods and performance criteria for fire alarm
sounders, including voice sounders, in a fixed installation intended to signal an audible warning between the
fire detection and fire alarm systems and the occupants of a building (see EN 54-1:2011).
This European Standard provides for the assessment and verification of constancy of performance (AVCP) of
fire alarm sounders to this EN.
This European Standard 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 sounders, for example, within the control and indicating equipment.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
EN 54-1:2011, Fire detection and fire alarm systems - Part 1: Introduction
EN 50130-4:2011, Alarm systems - Part 4: Electromagnetic compatibility - Product family standard: Immunity
requirements for components of fire, intruder, hold up, CCTV, access control and social alarm systems
EN 60068-1:1994, Environmental testing - Part 1: General and guidance (IEC 60068-1:1988 + Corrigendum
1988 + A1:1992)
EN 60068-2-1:2007, Environmental testing - Part 2-1: Tests - Test A: Cold (IEC 60068-2-1:2007)
EN 60068-2-2:2007, Environmental testing - Part 2-2: Tests - Test B: Dry heat (IEC 60068-2-2:2007)
EN 60068-2-6:2008, Environmental testing - Part 2-6: Tests - Test Fc: Vibration (sinusoidal)(IEC 60068-2-
6:2007)
EN 60068-2-27:2009, Environmental testing - Part 2-27: Tests - Test Ea and guidance: Shock (IEC 60068-2-
27:2008)
EN 60068-2-30:2005, Environmental testing - Part 2-30: Tests - Test Db: Damp heat, cyclic (12 h + 12 h
cycle)(IEC 60068-2-30:2005)
EN 60068-2-42:2003, Environmental testing - Part 2-42: Tests - Test Kc: Sulphur dioxide test for contacts and
connections (IEC 60068-2-42:2003)
EN 60068-2-75:1997, Environmental testing - Part 2-75: Tests - Test Eh: Hammer tests (IEC 60068-2-
75:1997)
EN 60068-2-78:2013, Environmental testing - Part 2-78: Tests - Test Cab: Damp heat, steady state (IEC
60068-2-78:2012)
EN 60529:1991, Degrees of protection provided by enclosures (IP Code)(IEC 60529:1989)
EN 60529:1991/A1:2000, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989/A1:1999)
EN 60695-11-10:2013, Fire hazard testing - Part 11-10: Test flames - 50 W horizontal and vertical flame test
methods (IEC 60695-11-10:2013)
EN 60695-11-20:1999, Fire hazard testing - Part 11-20: Test flames - 500 W flame test methods (IEC 60695-
11-20:1999)
EN 60695-11-20:1999/A1:2003, Fire hazard testing - Part 11-20: Test flames - 500 W flame test methods (IEC
60695-11- 20:1999/A1:2003)
EN 61672-1:2003, Electroacoustics - Sound level meters - Part 1: Specifications (IEC 61672-1:2002)
3 Terms, definitions and abbreviations
For the purposes of this European Standard, the following terms, definitions and abbreviations and those
given in EN 54-1 apply.
3.1 Definitions
3.1.1
A-weighted sound pressure level
L
pA
sound pressure level, expressed in dB(A), which is 20 times the logarithm to base ten of the ratio of the A-
weighted sound pressure level to the reference pressure of 20 μPa at 1 kHz
Note 1 to entry: The A-weighting characteristics are given in EN 61672–1:2003.
3.1.2
delta sound pressure level
Δ(L )
pA
decrease in the mean A-weighted sound pressure level between measurements on the same specimen
(Annex B)
Note 1 to entry: In this standard Δ(L ) is used to compare the sound pressure level measured during environmental
pA
tests with that first measured on the same specimen during the reproducibility test.
3.1.3
equivalent sound pressure level
L
Aeq,T
the value of the sound pressure level, in dB(A), of continuous sound that, within a specified time interval, T,
has the same mean-square sound pressure as a sound that varies with time
3.1.4
fire alarm sounder
sound generating device intended to signal an audible warning of fire between a fire detection and fire alarm
system and the occupants of a building
3.1.5
maximum sound pressure level
L
AFmax,T
the maximum value of the sound pressure level, in dB(A), measured within a specified time interval, T and
with a specified time weighting
Note 1 to entry: For application within the framework of this standard the time weighting Fast applies. Refer to
EN 61672–1:2003.
3.1.6
mode (of operation)
one of a possible number of pre-defined sounds (or sound outputs) of the sounder which can be selected by
means specified by the manufacturer
EXAMPLE Sound patterns, sound pressure levels.
3.1.7
reference point
point representing the origin of the sound within or on the surface of the sounder as specified by the
manufacturer
Note 1 to entry: The reference point is used in Annex A.
3.1.8
sound pattern
pre-defined acoustic alarm signal
Note 1 to entry: Sound pattern is also often referred to as tone.
3.1.9
supervisory sounder
audible device on a piece of equipment used for drawing attention to a change of status
Note 1 to entry: Supervisory sounders are often mounted within the fire detection and fire alarm control and indicating
equipment.
3.1.10
type A sounder
device primarily intended for indoor applications
Note 1 to entry: Type A sounders may be suitable for some protected outdoor situations.
3.1.11
type B sounder
device primarily intended for outdoor applications
Note 1 to entry: Type B sounders may be more suitable than type A sounders for some indoor situations where high
temperature and/or humidity are present.
3.1.12
volume control
means for adjusting sound pressure level
3.2 Abbreviations
AC Alternating current
AVCP Assessment and verification of constancy of performance
CWFT Classified without Further Testing
DC Direct current
DoP Declaration of performance
MS Member states
NPD No performance determined
RMS Root mean square
SPL Sound pressure level
4 Requirements
4.1 Compliance
In order to comply with this standard, sounders shall meet the requirements of this clause, which shall be
verified by visual inspection or engineering assessment and shall be tested as described in Clause 5 and shall
meet the requirements of the tests.
4.2 Operational reliability
4.2.1 Duration of operation
The sounder shall be rated for at least 100 h 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 5.2.1.
This requirement does not apply to the capacity of batteries which may be used within sounders as a means
of local storage of operating power. The capacity and charging requirements of such batteries need to meet
the requirement of the system.
4.2.2 Provision for external conductors
The sounder, unless it is a radio-linked component not using wires, shall provide space within its enclosure for
external conductors to be brought in and terminated. Entry holes for conductors or cables shall be provided or
the location where such holes are to be made shall be indicated, by providing a template or some other
suitable means.
Terminals for connecting external conductors to the sounder shall be designed so that the conductors are
clamped between metal surfaces without being damaged.
This requirement shall be assessed as specified in 5.2.2.
4.2.3 Flammability of materials
Plastic materials used in the construction of sounders shall comply with the following flammability
requirements:
a) EN 60695-11-10:2013 Class V-2 or HB75 for devices consuming less than or equal to 15 W of power;
b) EN 60695-11-20:1999 and EN 60695-11-20:1999/A1:2003 Class 5VB for devices consuming more than
15 W of power.
NOTE Annex E gives information on the test requirements and classification given in the European Standards and
equivalent flammability ratings in UL 94.
This shall be assessed as specified in 5.2.3.
4.2.4 Enclosure protection
The degree of protection provided by the enclosure of the sounders shall meet the following requirements:
a) Type A sounders: Code IP21C of EN 60529:1991 as amended by EN 60529:1991/A1:2000;
b) Type B sounders: Code IP33C of EN 60529:1991 as amended by EN 60529:1991/A1:2000.
This shall be assessed as specified in 5.2.4 and meet the compliance criteria of 5.2.4.3.
4.2.5 Access
Means shall be provided to limit access for removal of parts or the whole device and to make adjustment to
the mode of operation, e.g. special tool, codes, hidden screws, seals, etc.
NOTE The use of a special tool is intended to discourage unauthorised persons from easily accessing the
equipment.
This requirement shall be assessed as specified in 5.2.5.
4.2.6 Manufacturer's adjustment
It shall not be possible to change the manufacturer’s settings or to access the message recording function of
voice sounders except by special means (e.g. the use of a special code or tool) or by breaking or removing a
seal.
This requirement shall be assessed as specified in 5.2.6.
4.2.7 On-site adjustment of the operation mode
If there is provision for on-site adjustment of the mode of operation of the sounder:
a) For each setting, at which the manufacturer claims compliance with this standard, the sounder shall
comply with 4.2.6.
b) Any setting(s), at which the manufacturer does not claim compliance with this standard, shall comply with
4.2.6 and:
1) for volume controls, the limits of the compliant range of sound pressure levels shall be clearly marked
on the sounder and shown in the associated data,
2) for sound pattern, the compliant setting(s) shall be clearly marked in the associated data.
These adjustments may be carried out at the sounder or at the control and indicating equipment.
This requirement shall be assessed as specified in 5.2.7.
4.2.8 Software controlled sounders
4.2.8.1 General
For sounders which rely on software control in order to fulfil the requirements of this standard, the
requirements of 4.2.8.2, 4.2.8.3 and 4.2.8.4 shall be met.
4.2.8.2 Software documentation
4.2.8.2.1 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 standard
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:
1) a brief description of 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 sounder,
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.
4.2.8.2.2 The manufacturer shall have available detailed design documentation, which only needs to be
provided if required by the testing authority. 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,
3) a description of the interfaces, including the type of data transfer, the valid data range and the
checking for valid data.
c) 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;
d) details of any software tools used in the design and implementation phase (e.g. CASE-tools, compilers).
4.2.8.3 Software design
In order to ensure the reliability of the sounder, 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.
4.2.8.4 The storage of program and data
The programme necessary to comply with this standard and any pre-set 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 sounder.
Site-specific data shall be held in memory which will retain data for at least two weeks without external power
to the sounder, unless provision is made for the automatic renewal of such data, following loss of power,
within 1 h of power being restored.
4.2.8.5 Assessment
This requirement shall be assessed as specified in 5.2.8.
4.3 Performance parameters under fire conditions
4.3.1 Sound pressure level
The sounder shall produce A-weighted sound pressure levels as declared by the manufacturer.
The manufacturer may declare different sound pressure levels for operation under different conditions, for
example, 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 5.1.2).
When tested in accordance with 5.3.1 the sounder shall produce A-weighted sound pressure levels of at least
65 dB(A) in one direction and the sound pressure level measured at each of the specified angles is not less
than that declared by the manufacturer.
4.3.2 Frequencies and sound pattern
This standard covers sounders which produce different frequencies and sound patterns and, therefore, does
not specify a minimum and maximum frequency or specific sound pattern. The main sound frequency(ies),
frequency range(s) and sound pattern(s) shall be as declared by the manufacturer when tested as specified in
5.3.2.
NOTE Annex D gives information on some of the sound patterns and frequencies used in different European
countries and on the international evacuation signal specified in ISO 8201.
4.3.3 Synchronisation
Sounders may interact acoustically when they are installed in close proximity. To prevent this, sounders may
have provision for synchronising warning signals and messages with that of other devices. If a synchronisation
function is provided, it shall meet the compliance criteria of 5.3.3.
When power interruption is used for synchronisation purposes, this shall not adversely affect the warning
signal or the voice message.
NOTE Synchronisation can be achieved by internal circuitry, the addition of a trigger wire connected between devices
or by other means as defined by the manufacturer.
4.3.4 Performance of voice sounders
Voice sounders shall be capable of producing an attention-drawing signal, and a voice message or messages.
The output level of the voice message
...