FprEN 54-7 rev

Fire detection and fire alarm systems - Part 7: Smoke detectors - Point detectors using scattered light, transmitted light or ionisation

This European Standard specifies the requirements, test methods and performance criteria for point smoke detectors that operate using scattered light, transmitted light or ionization, for use in fire detection and fie alarm systems for buildings (see EN 54-1: 1996).
For other types of smoke detector, or for smoke detectors working on different principles, this standard should only be used for guidance.  Smoke detectors with special characteristics and developed for specific risks are not covered by this standard.

Brandmeldeanlagen - Teil 7: Rauchmelder - Punktförmige Melder nach dem Streulicht-, Durchlicht- oder Ionisationsprinzip

Diese Europäische Norm legt Anforderungen, Prüfverfahren und Leistungsmerkmale für punktförmige Rauchmelder fest, die nach dem Streulicht-, Durchlicht- oder Ionisationsprinzip arbeiten und die in Brandmeldeanlagen für Gebäude eingesetzt werden (siehe EN 54 1:1996). Diese Europäische Norm umfasst punktförmige Rauchmelder mit mehr als einem Rauchsensor, die nach diesem Prinzip arbeiten, zusätzliche Anforderungen und Prüfverfahren für derartige Melder sind im Anhang N aufgeführt.
Für andere Typen von Rauchmeldern oder für Rauchmelder, die nach anderen Prinzipien arbeiten, sollte die vorliegende Norm nur als Leitfaden angewendet werden. Rauchmelder mit speziellen Merkmalen, entwickelt für besondere Risiken, sind nicht Gegenstand dieser Norm.
ANMERKUNG   Einige Meldertypen enthalten radioaktive Werkstoffe. Die nationalen Anforderungen für den Schutz gegen ionisierende Strahlung sind in den Ländern unterschiedlich und werden deshalb in der vorliegenden Norm nicht festgelegt.

Systèmes de détection et d'alarme incendie - Partie 7: Détecteurs de fumée - Détecteurs ponctuels fonctionnant suivant le principe de la diffusion de la lumière, de la transmission de la lumière ou de l'ionisation

La présente norme européenne spécifie les exigences, les méthodes d'essais et les critères de performance des détecteurs ponctuels fonctionnant suivant le principe de la diffusion de la lumière, de la transmission de la lumière ou de l'ionisation, utilisés dans les systèmes de détection et d'alarme incendie installés dans les bâtiments (voir EN 54-1:1996). La présente norme européenne comprend les détecteurs ponctuels de fumée qui ont plus d’un capteur de fumée fonctionnant suivant ces principes ; les exigences complémentaires et les méthodes d’essai de ces détecteurs sont fournies dans l’Annexe N.
Pour d'autres types de détecteurs de fumée ou pour ceux fonctionnant sur des principes différents, il convient d’utiliser cette partie de la norme comme un guide. Les détecteurs de fumée possédant des caractéristiques particulières, conçus pour des risques spéciaux, ne sont pas couverts par la présente norme.
NOTE   Certains types de détecteurs contiennent des matières radioactives. Les exigences nationales de radioprotection variant d'un pays à l'autre, celles-ci ne sont pas spécifiées dans la présente norme.

Sistemi za odkrivanje in javljanje požara ter alarmiranje - 7. del: Dimni javljalniki - Točkovni javljalniki na principu sipanja svetlobe, prepuščene svetlobe ali ionizacije

General Information

• Status: Not Published
• Publication Date: 24-Mar-2013
• ICS: 13.220.20 - Fire protection
• Technical Committee: CEN/TC 72 - Fire detection and fire alarm systems
• Drafting Committee: CEN/TC 72/WG 5 - Point heat and smoke detectors and short-circuit isolators
• Current Stage: 5098 - Decision to abandon - Formal Approval
• Start Date: 22-May-2013
• Completion Date: 22-May-2013
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Mandate: M/109 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on fire alarm/detection, fixed firefighting, fire and smoke control and explosion suppression products
• Ref Project: oSIST prEN 54-7:2011 - Fire detection and fire alarm systems - Part 7: Smoke detectors - Point detectors using scattered light, transmitted light or ionisation

Relations

• Revises: EN 54-7:2000 - Fire detection and fire alarm systems - Part 7: Smoke detectors - Point detectors using scattered light, transmitted light or ionization
• Effective Date: 19-Jan-2023

Overview - FprEN 54-7 rev (CEN)

FprEN 54-7 rev is the CEN draft revision of the European standard for smoke detectors used in building fire detection and fire alarm systems. It specifies requirements, test methods and performance criteria for point smoke detectors that operate on three principles: scattered (diffuse) light, transmitted light and ionisation. The standard applies to conventional point-type smoke detectors intended for general fire detection in buildings and is referenced against EN 54-1 for system-level considerations. Detectors designed for special risks or based on other sensing principles are outside its scope (the standard may be used for guidance only).

Key topics and technical requirements

The standard defines a comprehensive test and performance framework covering:

• Operational reliability
  • Individual alarm indication, ancillary device connections, monitoring of detachable detectors, on-site and factory adjustments, ingress protection and marking/data requirements.
• Nominal activation conditions and sensitivity
  • Requirements and test methods for repeatability, directional dependence and reproducibility of response.
• Electrical and environmental tolerance
  • Tolerance to supply voltage variations, EMC immunity and electrical stability.
• Response characteristics
  • Response delay (response time) including effects of air movement and optical dazzling.
• Durability tests
  • Temperature (heat/cold), humidity (damp heat), corrosion (e.g., SO2 exposure), vibration, shock and impact to verify long-term reliability.
• Performance under fire conditions
  • Fire sensitivity tests and measurement methods for real-world smoke responses.
• Conformity and quality control
  • Initial type testing, factory production control (FPC), documentation and procedures for product modifications.
• Normative test resources
  • Includes smoke tunnel designs, standardized test aerosol and smoke-measuring instruments (obscuration meters, ionization measurement) as normative annexes.

Applications and who uses this standard

FprEN 54-7 rev is intended for:

• Detector manufacturers - for design, type testing and compliance documentation.
• Independent test laboratories and notified bodies - to perform standardized performance and durability tests.
• Fire safety engineers, system designers and specifiers - to select suitable point smoke detectors for building projects.
• Installers and maintenance organizations - to understand operational limits, installation effects and on-site adjustment provisions.
• Authorities having jurisdiction and procurement teams - for product evaluation and acceptance criteria.

Related standards

• EN 54-1 (fire detection and fire alarm systems - general requirements)
• Other parts of EN 54 series (system components and test methods)

Keywords: EN 54-7, FprEN 54-7 rev, smoke detectors, point detectors, scattered light, transmitted light, ionisation, fire detection, fire alarm systems, CEN, detector testing.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2011
6LVWHPL]DRGNULYDQMHLQMDYOMDQMHSRåDUDWHUDODUPLUDQMHGHO'LPQLMDYOMDOQLNL
7RþNRYQLMDYOMDOQLNLQDSULQFLSXVLSDQMDVYHWOREHSUHSXãþHQHVYHWOREHDOL
LRQL]DFLMH
Fire detection and fire alarm systems - Part 7: Smoke detectors - Point detectors using
scattered light, transmitted light or ionisation
Brandmeldeanlagen - Teil 7: Rauchmelder - Punktförmige Melder nach dem Streulicht-,
Durchlicht- oder Ionisationsprinzip
Systèmes de détection et d'alarme incendie - Partie 7: Détecteurs de fumée - Détecteurs
ponctuels fonctionnant suivant le principe de la diffusion de la lumière, de la transmission
de la lumière ou de l'ionisation
Ta slovenski standard je istoveten z: prEN 54-7 rev
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
DRAFT
prEN 54-7 rev
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2011
ICS 13.220.20 Will supersede EN 54-7:2000
English Version
Fire detection and fire alarm systems - Part 7: Smoke detectors
- Point detectors using scattered light, transmitted light or
ionisation
Systèmes de détection et d'alarme incendie - Partie 7: Brandmeldeanlagen - Teil 7: Rauchmelder - Punktförmige
Détecteurs de fumée - Détecteurs ponctuels fonctionnant Melder nach dem Streulicht-, Durchlicht- oder
suivant le principe de la diffusion de la lumière, de la Ionisationsprinzip
transmission de la lumière ou de l'ionisation
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 72.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 54-7 rev:2011: E
worldwide for CEN national Members.

prEN 54-7:2011 (E)
Contents Page
Foreword .6
1 Scope .8
2 Normative references .8
3 Terms and definitions .9
4 Requirements . 10
4.1 Compliance . 10
4.2 Operational reliability . 10
4.2.1 Individual alarm indication . 10
4.2.2 Connection of ancillary devices . 10
4.2.3 Monitoring of detachable detectors . 10
4.2.4 Manufacturer's adjustments . 10
4.2.5 On-site adjustment of response behaviour . 10
4.2.6 Protection against the ingress of foreign bodies . 11
4.2.7 Response to slowly developing fires. 11
4.2.8 Marking . 11
4.2.9 Data . 12
4.2.10 Additional requirements for software controlled detectors . 12
4.3 Nominal activation conditions/sensitivity . 14
4.3.1 Repeatability . 14
4.3.2 Directional Dependence . 14
4.3.3 Reproducibility . 14
4.4 Tolerance to supply voltage . 14
4.4.1 Variation in supply parameters . 14
4.5 Response delay (response time). 14
4.5.1 Air movement . 14
4.5.2 Dazzling . 14
4.6 Durability of reliability, temperature resistance: . 14
4.6.1 Dry heat (operational) . 14
4.6.2 Cold (operational) . 14
4.7 Durability of reliability, humidity resistance: . 15
4.7.1 Damp heat, steady state (operational) . 15
4.7.2 Damp heat, steady state (endurance) . 15
4.8 Durability of reliability, corrosion resistance: . 15
4.8.1 Sulphur dioxide (SO ) corrosion (endurance) . 15
4.9 Durability of reliability, vibration resistance: . 15
4.9.1 Shock (operational) . 15
4.9.2 Impact (operational). 15
4.9.3 Vibration, sinusoidal, (operational). 15
4.9.4 Vibration, sinusoidal (endurance) . 15
4.10 Durability of operational reliability, electrical stability: . 15
4.10.1 Electromagnetic Compatibility (EMC), Immunity tests (operational) . 15
4.11 Performance parameters under fire conditions: . 16
4.11.1 Fire sensitivity . 16
5 Tests . 17
5.1 General . 17
5.1.1 Atmospheric conditions for tests . 17
5.1.2 Operating conditions for tests . 17
5.1.3 Mounting arrangements . 17
5.1.4 Tolerances . 17
prEN 54-7:2011 (E)
5.1.5 Measurement of response value . 17
5.1.6 Provision for tests . 18
5.1.7 Test schedule . 19
5.2 Operational reliability: . 20
5.2.1 Individual alarm indication . 20
5.2.2 Connection of ancillary devices . 20
5.2.3 Monitoring of detachable detectors . 20
5.2.4 Manufacturer's adjustments . 20
5.2.5 On-site adjustment of response behaviour . 20
5.2.6 Protection against the ingress of foreign bodies . 20
5.2.7 Response to slowly developing fires . 20
5.2.8 Marking . 21
5.2.9 Data . 21
5.2.10 Additional requirements for software controlled detectors . 21
5.3 Nominal activation conditions/sensitivity . 21
5.3.1 Repeatability . 21
5.3.2 Directional dependence . 21
5.3.3 Reproducibility . 22
5.4 Tolerance to supply voltage . 22
5.4.1 Variation in supply parameters . 22
5.5 Response delay (response time) . 23
5.5.1 Air movement . 23
5.5.2 Dazzling . 24
5.6 Durability of reliability, temperature resistance: . 24
5.6.1 Dry heat (operational) . 24
5.6.2 Cold (operational) . 25
5.7 Durability of reliability, humidity resistance:. 26
5.7.1 Damp heat, steady state (operational) . 26
5.7.2 Damp heat, steady state (endurance) . 27
5.8 Durability of reliability, corrosion resistance: . 27
5.8.1 Sulphur dioxide (SO ) corrosion (endurance) . 27
5.9 Durability of reliability, vibration resistance: . 28
5.9.1 Shock (operational) . 28
5.9.2 Impact (operational) . 29
5.9.3 Vibration, sinusoidal, (operational) . 30
5.9.4 Vibration, sinusoidal (endurance) . 31
5.10 Durability of operational reliability, electrical stability: . 32
5.10.1 Electromagnetic Compatibility (EMC), Immunity tests (operational) . 32
5.11 Performance parameters under fire conditions: . 33
5.11.1 Fire sensitivity . 33
6 Evaluation of conformity . 35
6.1 General . 35
6.2 Initial type testing . 35
6.2.1 General . 35
6.2.2 Test samples . 36
6.2.3 Test reports . 36
6.3 Factory production control. 36
6.3.1 General . 36
6.3.2 General requirements . 37
6.3.3 Product specific requirements . 38
6.3.4 Initial inspection of factory and FPC . 39
6.3.5 Surveillance of FPC . 40
6.4 Procedure for modifications. 40
6.5 One-off products, pre-production products, prototypes and products produced in very
low quantities . 40
Annex A (normative) Smoke tunnel for response value measurements . 42
Annex B (normative) Test aerosol for response value measurements . 43
prEN 54-7:2011 (E)
Annex C (normative) Smoke measuring instruments . 44
C.1 Obscuration meter . 44
C.2 Measuring ionization chamber (MIC) . 45
C.2.1 General . 45
C.2.2 Operating method and basic construction . 45
C.2.3 Technical data . 47
Annex D (normative) Apparatus for dazzling test . 49
Annex E (informative) Apparatus for impact test . 50
Annex F (normative) Fire test room . 52
Annex G (normative) Smouldering (pyrolysis) wood fire (TF2) . 54
G.1 Fuel . 54
G.2 Hotplate . 54
G.3 Arrangement . 54
G.4 Heating rate . 55
G.5 End of test condition . 55
G.6 Test validity criteria . 55
Annex H (normative) Glowing smouldering cotton fire (TF3) . 56
H.1 Fuel . 56
H.2 Arrangement . 56
H.3 Ignition . 57
H.4 End of test condition . 57
H.5 Test validity criteria . 57
Annex I (normative) Flaming plastics (polyurethane) fire (TF4) . 58
I.1 Fuel . 58
I.2 Arrangement . 58
I.3 Ignition . 58
I.4 End of test condition . 58
I.5 Test validity criteria . 58
Annex J (normative) Flaming liquid (n-heptane) fire (TF5). 60
J.1 Fuel . 60
J.2 Arrangement . 60
J.3 Ignition . 60
J.4 End of test condition . 60
J.5 Test validity criteria . 60
Annex K (informative) Information concerning the construction of the smoke tunnel . 62
Annex L (informative) Information concerning the requirements for the response to slowly
developing fires . 64
Annex M (informative) Information concerning the construction of the measuring ionization
chamber . 68
Annex N (normative) Additional requirements and test methods for smoke detectors with more
than one smoke sensor . 70
N.1 General . 70
N.2 Measurement of the response value for smoke detectors with more than one smoke
sensor . 70
N.3 Assessment of sensor stability . 70
Annex O . 71
(normative) Test set-up for testing the protection against the effect of moving objects . 71
Annex P (normative) Apparatus open detector static object test . 73
Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU
Construction Products Directive (89/106/EEC) . 75
ZA.1 Scope and relevant characteristics . 75
prEN 54-7:2011 (E)
ZA.2 Procedures for the attestation of conformity of smoke detector for use in fire detection
and fire alarm systems for buildings . 77
ZA.2.1 System of attestation of conformity . 77
ZA.2.2 EC Certificate of conformity . 78
ZA.3 CE marking and labelling. 79

prEN 54-7:2011 (E)
Foreword
This document (prEN 54-7:2011) has been prepared by Technical Committee CEN/TC 72 “Fire detection and
fire alarm systems”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 54-7:2000.
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, see informative Annex ZA, which is an integral part of this document.
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
prEN 54-7:2011 (E)
 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.
prEN 54-7:2011 (E)
1 Scope
This European Standard specifies requirements, test methods and performance criteria for point smoke
detectors that operate using scattered light, transmitted light or ionization, for use in fire detection and fire
alarm systems for buildings (see EN 54-1:1996). This European Standard includes point smoke detectors that
incorporate more than one smoke sensor operating on these principles, and additional requirements and test
methods for such detectors are given in Annex N.
For other types of smoke detector, or smoke detectors working on different principles, this standard should
only be used for guidance. Smoke detectors with special characteristics and developed for specific risks are
not covered by this standard.
NOTE Certain types of detector contain radioactive materials. The national requirements for radiation protection differ
from country to country and they are not specified in this standard.
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/IEC Year Title EN/HD Year
Publication
-  - Fire detection and fire alarm systems - EN 54-1 1996
Part 1: Introduction.
-  - Alarm Systems – Part 4: Electromagnetic EN 50130-4 1995
compatibility EN 50130-4:
- product family standard: Immunity
requirements for 1995/A2:2003 2003
components of fire, intruder and
social alarm systems
IEC 60068-1 1988 Environmental testing - Part 1: General and EN 60068-1 1994
guidance, + A1:1992.
IEC 60068-2-1 1990 Environmental testing - Part 2: Tests - Tests A: EN 60068-2-1 1993
Cold, + A1:1993, A2:1994.
IEC 60068-2-3 1969 Basic environmental testing procedures - HD 323.2.3 S2 1987
Part 2: Tests - Test Ca: Damp heat, steady state, +
A1:1984.
prEN 54-7:2011 (E)
IEC 60068-2-6 1995 Environmental testing - Part 2: Tests - Test Fc: EN 60068-2-6 1995
Vibration, sinusoidal, + Corr.:1995.
IEC 60068-2-27 1987 Basic environmental testing procedures - EN 60068-2-27 1993
Part 2: Tests - Test Ea & Guidance: Shock.
IEC 60068-2-42 1982 Basic environmental testing procedures - - -
Part 2: Tests - Test Kc: Sulphur dioxide test for
contacts and connections.
IEC 60068-2-56 1988 Environmental testing - Part 2: Tests - Test Cb: HD 323.2.56 S1 1990
Damp heat steady state, primarily for equipment.
ISO 209-1 1989 Wrought aluminium and aluminium alloys - - -
Chemical composition and forms of products —-
Part 1: Chemical composition.
3 Terms and definitions
For the purposes of this standard, the following term and definition and those given in EN 54-1:1996 apply:
3.1
closed detector
optical or ionization detector with the sensing volume inside the enclosure
3.2
open detector
0ptical smoke detector with the sensing volume(s) outside the enclosure
3.3
response value
aerosol density in the proximity of the specimen at the moment that it generates an alarm signal, when tested
as described in 5.1.5
NOTE The response value may depend on signal processing in the detector and in the control and indicating
equipment.
prEN 54-7:2011 (E)
4 Requirements
4.1 Compliance
In order to comply with this standard the detector shall meet the requirements of clause 4, which shall be
verified by visual inspection or engineering assessment, shall be tested as described in clause 5 and, for
detectors with more than one smoke sensor, Annex N and shall meet the requirements of the tests.
4.2 Operational reliability
4.2.1 Individual alarm indication
Each detector shall be provided with an integral red visual indicator, by which the individual detector, which
released an alarm, can be identified, until the alarm condition is reset. Where other conditions of the detector
can be visually indicated, they shall be clearly distinguishable from the alarm indication, except when the
detector is switched into a service mode. For detachable detectors the indicator may be integral with the base
or the detector head. The visual indicator shall be visible from a distance of 6 m directly below the detector, in
an ambient light intensity up to 500 lux. To confirm this, the detector shall be assessed in accordance with
clause 5.2.1.
Note : The alarm condition is reset manually at the control and indicating equipment (See EN 54-2).
4.2.2 Connection of ancillary devices
Where the detector provides for connections to ancillary devices (e.g. remote indicators, control relays),
open- or short-circuit failures of these connections shall not prevent the correct operation of the detector. To
confirm this, the detector shall be assessed in accordance with clause 5.2.2.
4.2.3 Monitoring of detachable detectors
For detachable detectors, a means shall be provided for a remote monitoring system (e.g. the control and
indicating equipment) to detect the removal of the head from the base, in order to give a fault signal. To
confirm this, the detector shall be assessed in accordance with clause 5.2.3.
4.2.4 Manufacturer's adjustments
It shall not be possible to change the manufacturer's settings except by special means (e.g. the use of a
special code or tool) or by breaking or removing a seal. To confirm this, the detector shall be assessed in
accordance with clause 5.2.4.
4.2.5 On-site adjustment of response behaviour
If there is provision for on-site adjustment of the response behaviour of the detector then:
a) for each setting, at which the manufacturer claims compliance with this standard, the detector shall
comply with the requirements of this standard, and access to the adjustment means shall only be possible
by the use of a code or special tool or by removing the detector from its base or mounting;
b) any setting(s), at which the manufacturer does not claim compliance with this standard, shall only be
accessible by the use of a code or special tool, and it shall be clearly marked on the detector or in the
associated data, that if these setting(s) are used, the detector does not comply with the standard.
NOTE These adjustments may be carried out at the detector or at the control and indicating equipment.
prEN 54-7:2011 (E)
To confirm this, the detector shall be assessed in accordance with clause 5.2.5.
4.2.6 Protection against the ingress of foreign bodies
4.2.6.1 Closed detectors
Closed detectors shall be so designed that a sphere of diameter (1,3 ± 0,05) mm cannot pass into the sensor
chamber(s).
NOTE This requirement is intended to restrict the access of insects into the sensitive parts of the detector. It is known
that this requirement is not sufficient to prevent the access of all insects, however it is considered that extreme restrictions
on the size of access holes may introduce the danger of clogging by dust etc. It may therefore be necessary to take other
precautions against false alarms due to the entry of small insects.
4.2.6.2 Open detectors
Open detector shall be designed such that
a) a sphere of (1,3 ± 0,05) mm cannot pass into any enclosure containing active optoelectronic components
b) a total block of the detector surface shall not cause a false alarm and shall signal a fault.
c) An object moving within the sensitive volume for 60 seconds per velocity shall not cause a false alarm.
d) An object moving at 0.2 rps with minimum distance of 6 mm ± 1 mm to the nearest point of the surface of
the detector shall not cause false alarm but may give fault signal.
To confirm this, the detector shall be assessed in accordance with clause 5.2.6.
4.2.7 Response to slowly developing fires
The provision of "drift compensation" (e.g. to compensate for sensor drift due to the build up of dirt in the
detector), shall not lead to a significant reduction in the detector's sensitivity to slowly developing fires.
Since it is not practical to make tests with very slow increases in smoke density, an assessment of the
detector's response to slow increases in smoke density shall be made by analysis of the circuit/software,
and/or physical tests and simulations.
The detector shall be deemed to meet the requirements of this clause if this assessment shows that:
a) for any rate of increase in smoke density R, which is greater than A/4 per hour (where A is the detector's
initial uncompensated response value), the time for the detector to give an alarm does not exceed
1,6 × A/R by more than 100 s; and
b) the range of compensation is limited such that, throughout this range, the compensation does not cause
the response value of the detector to exceed its initial value by a factor greater than 1,6.
NOTE Further information about the assessment of these requirements is given in annex L.
To confirm this, the detector shall be assessed in accordance with clause 5.2.7.
4.2.8 Marking
Each detector shall be clearly marked with the following information:
a) the number of this standard and its date(i.e. EN 54-7:2009);
prEN 54-7:2011 (E)
b) the name or trademark of the manufacturer or supplier;
c) the model designation (type or number);
d) the wiring terminal designations;
e) some mark(s) or code(s) (e.g. 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 detector.
For detachable detectors, the detector head shall be marked with a), b), c) and e), and the base shall be
marked with, at least c) (i.e. its own model designation) and d).
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 shall be visible during installation of the detector and shall be accessible during maintenance.
The markings shall not be placed on screws or other easily removable parts.
To confirm this, the detector shall be assessed in accordance with clause 5.2.8.
4.2.9 Data
Detectors shall either be supplied with sufficient technical, installation and maintenance data to enable their
1)
correct installation and operation or, if all of these data are not supplied with each detector, reference to the
appropriate data sheet shall be given on, or with each detector. To confirm this, the detector shall be
assessed in accordance with clause 5.2.9.
NOTE Additional information may be required by organisations certifying that detectors produced by a manufacturer
conform to the requirements of this standard.
4.2.10 Additional requirements for software controlled detectors
4.2.10.1 General
For detectors which rely on software control in order to fulfil the requirements of this standard, the
requirements of 4.11.2, 4.11.3 and 4.11.4 shall be met.
4.2.10.2 Software documentation
4.2.10.2.1 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 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;

1)
To enable correct operation of the detectors, these data should describe the requirements for the correct
processing of the signals from the detector. This may be in the form of a full technical specification of these signals, a

reference to the appropriate signalling protocol or a reference to suitable types of control and indicating equipment etc.
prEN 54-7:2011 (E)
4) the way in which the software interacts with the hardware of the detector;
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.
4.2.10.2.2 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).
4.2.10.3 Software design
In order to ensure the reliability of the detector, the following requirements for 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.
4.2.10.4 The storage of programs and data
The program necessary to comply with this standard 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 possibl
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