EN 54-30:2015

Fire detection and fire alarm systems - Part 30: Multi-sensor fire detectors - Point detectors using a combination of carbon monoxide and heat sensors

This European Standard specifies requirements, test methods and performance criteria for point-type multi-sensor fire detectors for use in fire detection systems installed in and around buildings (see EN 54 1:2011), incorporating in one mechanical enclosure at least one carbon monoxide sensor and at least one heat sensor and where the overall fire detection performance is determined utilizing the combination of the detected phenomena.
This European Standard provides for the assessment and verification of consistency of performance (AVCP) of multi-sensor fire detectors using a combination of carbon monoxide and heat sensors to this EN.
Multi-sensor fire detectors using carbon monoxide and heat sensors having special characteristics suitable for the detection of specific fire risks are not covered by this European Standard. The performance requirements for any additional functions are beyond the scope of this standard (e.g. additional features or enhanced functionality for which this European Standard does not define a test or assessment method).

Brandmeldeanlagen - Teil 30: Mehrfachsensor-Brandmelder - Punktförmige Melder mit kombinierten CO- und Wärmesensoren

Diese Europäische Norm legt Anforderungen, Prüfverfahren und Leistungsmerkmale für punktförmige Mehr-fachsensormelder fest, die in Brandmeldeanlagen innerhalb und außerhalb von Gebäuden eingesetzt werden (siehe EN 54-1:2011) und die in einem Gehäuse mindestens einen Kohlenmonoxidsensor und mindestens einen Wärmesensor enthalten und deren Gesamtleistung sich bei der Brandmeldung aus der Kombination der festgestellten Brandphänomene ergibt.
Diese Europäische Norm enthält die Verfahren zur Bewertung und Überprüfung der Leistungsbeständigkeit (AVCP) von Multisensor-Brandmeldern mit Kohlenmonoxid- und Temperatursensoren nach der vorliegenden Europäischen Norm.
Multisensor-Brandmelder mit Kohlenmonoxid- und Temperatursensoren mit speziellen Merkmalen, die zum Erkennen besonderer Brandrisiken geeignet sind, sind nicht Gegenstand dieser Europäischen Norm. Die Leistungsanforderungen an alle zusätzlichen Funktionen fallen nicht in den Anwendungsbereich dieser Norm (z. B. werden in dieser Europäischen Norm für zusätzliche Merkmale oder für eine verbesserte Funktionstüchtigkeit keine Prüf- oder Bewertungsverfahren festgelegt).

Système de détection et d'alarme incendie - Partie 30: Détecteurs d'incendie multicapteur - Détecteurs ponctuels utilisant une combinaison de capteurs de monoxide de carbone et de température

Sistemi za odkrivanje in javljanje požara ter alarmiranje - 30. del: Večsenzorski javljalniki požara - Točkovni javljalniki s senzorjema za zaznavanje ogljikovega monoksida in toplote

General Information

• Status: Published
• Publication Date: 07-Apr-2015
• Withdrawal Date: 29-Apr-2019
• ICS: 13.220.20 - Fire protection
• Technical Committee: CEN/TC 72 - Fire detection and fire alarm systems
• Drafting Committee: CEN/TC 72/WG 20 - CO detectors
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 08-Apr-2015
• Due Date: 28-Feb-2015
• Completion Date: 08-Apr-2015
• 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: SIST EN 54-30:2015 - Fire detection and fire alarm systems - Part 30: Multi-sensor fire detectors - Point detectors using a combination of carbon monoxide and heat sensors

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2015
6LVWHPL]DRGNULYDQMHLQMDYOMDQMHSRåDUDWHUDODUPLUDQMHGHO9HþVHQ]RUVNL
MDYOMDOQLNLSRåDUD7RþNRYQLMDYOMDOQLNLVVHQ]RUMHPD]D]D]QDYDQMHRJOMLNRYHJD
PRQRNVLGDLQWRSORWH
Fire detection and fire alarm systems - Part 30: Multi-sensor fire detectors - Point
detectors using a combination of carbon monoxide and heat sensors
Brandmeldeanlagen - Teil 30: Mehrfachsensor-Brandmelder - Punktförmige Melder mit
kombinierten CO- und Wärmesensoren
Système de détection et d'alarme incendie - Partie 30: Détecteurs d'incendie
multicapteur - Détecteurs ponctuels utilisant une combinaison de capteurs de monoxide
de carbone et de température
Ta slovenski standard je istoveten z: EN 54-30:2015
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 54-30
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2015
ICS 13.220.20
English Version
Fire detection and fire alarm systems - Part 30: Multi-sensor fire
detectors - Point detectors using a combination of carbon
monoxide and heat sensors
Système de détection et d'alarme incendie - Partie 30: Brandmeldeanlagen - Teil 30: Mehrfachsensor-
Détecteurs d'incendie multicapteur - Détecteurs ponctuels Brandmelder - Punktförmige Melder mit kombinierten CO-
utilisant une combinaison de capteurs de monoxide de und Wärmesensoren
carbone et de température
This European Standard was approved by CEN on 25 January 2015.

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
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 54-30:2015 E
worldwide for CEN national Members.

Contents Page
Foreword .6
Introduction .8
1 Scope .9
2 Normative references .9
3 Terms, definitions and abbreviations . 10
3.1 Terms and definitions . 10
3.2 Abbreviations . 10
4 Requirements . 10
4.1 General . 10
4.2 Nominal activation conditions/sensitivity . 10
4.2.1 Individual alarm indication . 10
4.2.2 Rate sensitive CO response . 11
4.2.3 Response to slowly developing fires. 11
4.2.4 Repeatability of CO response . 11
4.2.5 Directional dependence of CO response . 11
4.2.6 Directional dependence of heat response . 11
4.2.7 Lower limit of heat response . 11
4.2.8 Reproducibility of CO response . 11
4.2.9 Reproducibility of heat response . 11
4.2.10 Air movement . 11
4.3 Operational reliability . 12
4.3.1 Connection of ancillary devices . 12
4.3.2 Monitoring of detachable detectors . 12
4.3.3 Manufacturer's adjustments . 12
4.3.4 On-site adjustment of behaviour . 12
4.3.5 Software-controlled detectors . 12
4.3.6 Long-term stability. 13
4.4 Tolerance to supply voltage — Variation in supply parameters . 14
4.5 Performance parameters under fire conditions — Fire sensitivity . 14
4.6 Durability of nominal activation/sensitivity . 14
4.6.1 Temperature resistance . 14
4.6.2 Humidity resistance . 14
4.6.3 Corrosion resistance — SO corrosion (endurance) . 14
4.6.4 Shock and vibration resistance . 15
4.6.5 Electrical stability — EMC, immunity (operational) . 15
4.6.6 Resistance to chemical agents . 15
5 Test and evaluation methods . 15
5.1 General . 15
5.1.1 Atmospheric conditions for tests . 15
5.1.2 Operating conditions for tests . 16
5.1.3 Mounting arrangements . 16
5.1.4 Tolerances . 16
5.1.5 Measurement of CO response value. 16
5.1.6 Measurement of heat response value . 17
5.1.7 Provision for tests . 17
5.1.8 Test schedule . 18
5.2 Nominal activation conditions/sensitivity . 19
5.2.1 Individual alarm indication . 19
5.2.2 Rate sensitive CO response . 19
5.2.3 Response to slowly developing fire . 19
5.2.4 Repeatability of CO response . 20
5.2.5 Directional dependence of CO response . 20
5.2.6 Directional dependence of heat response . 21
5.2.7 Lower limit of heat response . 21
5.2.8 Reproducibility of CO response . 22
5.2.9 Reproducibility of heat response . 22
5.2.10 Air movement . 23
5.3 Operational reliability . 23
5.3.1 Connection of ancillary devices . 23
5.3.2 Monitoring of detachable detectors . 23
5.3.3 Manufacturer's adjustments . 23
5.3.4 On-site adjustment of behaviour . 23
5.3.5 Software controlled devices . 23
5.3.6 Long-term stability (operational) . 24
5.4 Tolerance to supply voltage — Variations in supply parameters . 24
5.4.1 Object. 24
5.4.2 Test procedure . 24
5.4.3 Requirements . 24
5.5 Performance parameters under fire conditions — Fire sensitivity . 25
5.5.1 Object. 25
5.5.2 Principle . 25
5.5.3 Test procedure . 25
5.5.4 Requirements . 27
5.6 Durability . 27
5.6.1 Temperature resistance . 27
5.6.2 Humidity resistance . 30
5.6.3 Corrosion resistance — Sulphur dioxide SO corrosion (endurance). 34
5.6.4 Shock and vibration resistance . 35
5.6.5 Electrical stability — EMC, immunity (operational) . 39
5.6.6 Resistance to chemical agents . 41
6 Assessment and verification of constancy of performance (AVCP) . 43
6.1 General . 43
6.2 Type testing . 43
6.2.1 General . 43
6.2.2 Test samples, testing and compliance criteria . 44
6.2.3 Test reports . 44
6.3 Factory production control (FPC) . 44
6.3.1 General . 44
6.3.2 Requirements . 45
6.3.3 Product specific requirements . 47
6.3.4 Initial inspection of factory and FPC . 48
6.3.5 Continuous surveillance of FPC . 48
6.3.6 Procedure for modifications . 49
6.3.7 One-off products, pre-production products, (e.g. prototypes) and products produced in

very low quantities . 49
7 Classification . 50
8 Marking, labelling and packaging . 50
Annex A (normative) Gas test chamber for CO response value and cross-sensitivity to chemical

agents . 51
A.1 General . 51
A.2 Gas test chamber specification . 51
Annex B (normative) Fire test room . 52
B.1 General . 52
B.2 Fire test room specification . 52
Annex C (normative) Measuring instruments for smoke and CO . 55
C.1 General . 55
C.2 CO measuring instrument . 55
C.3 Obscuration meter . 55
C.4 Measuring ionization chamber (MIC) . 55
Annex D (informative) Establishing exposure levels of chemical agents . 56
D.1 General . 56
D.2 Establishing concentration of chemical agents for test gases 1 to 9 of 5.23 . 56
D.3 Verification of test chamber leakage . 56
D.4 Establishing concentration of ozone . 56
Annex E (normative) Heat tunnel for heat response value . 58
E.1 General . 58
E.2 Heat tunnel specification . 58
Annex F (normative) Smouldering (pyrolysis) wood fire (TF2) . 59
F.1 General . 59
F.2 Fuel . 59
F.3 Hotplate . 59
F.4 Arrangement . 59
F.5 Heating rate . 59
F.6 End-of-test condition . 59
F.7 Test validity criteria . 60
Annex G (normative) Glowing smouldering cotton fire (TF3) . 64
G.1 Introduction . 64
G.2 Fuel . 64
G.3 Arrangement . 64
G.4 Ignition . 65
G.5 End-of-test condition . 66
G.6 Test validity criteria . 66
Annex H (normative) Open plastics (polyurethane) fire (TF4) . 70
H.1 Introduction . 70
H.2 Fuel . 70
H.3 Conditioning . 70
H.4 Arrangement . 70
H.5 Ignition . 70
H.6 Method of ignition . 70
H.7 End-of-test condition . 70
H.8 Test validity criteria . 71
Annex I (normative) Liquid (heptane) fire (TF5) . 74
I.1 Introduction . 74
I.2 Fuel . 74
I.3 Arrangement . 74
I.4 Ignition . 74
I.5 End-of-test condition . 74
I.6 Test validity criteria . 74
Annex J (informative) Information concerning the construction of the gas test chamber . 78
J.1 General . 78
J.2 Construction of the gas test chamber . 78
Annex K (informative) Construction of the heat tunnel . 80
K.1 General . 80
K.2 Construction of the heat tunnel . 80
Annex L (informative) Apparatus for impact test. 84
L.1 General . 84
L.2 Impact apparatus construction . 84
Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU

Construction Products Regulation . 87
Bibliography . 97

Foreword
This document (EN 54-30:2015) 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 October 2015, and conflicting national standards shall be withdrawn at
the latest by April 2019.
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 has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of Regulation (EU) 305/2011.
For relationship with EU Regulations 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 detectors — Point detectors;
— Part 11: Manual call points;
— Part 12: Smoke detectors — Line detectors using an optical light beam;
— Part 13: Compatibility assessment of system components;
— Part 14: Guidelines for planning, design, installation, commissioning, use and maintenance [CEN
Technical Specification];
— 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 routing equipment;
— Part 22: Resettable line-type heat detectors [currently at acceptance stage];
— Part 23: Fire alarm devices — Visual alarms devices;
— Part 24: Components of voice alarm systems — Loudspeakers;
— Part 25: Components using radio links;
— Part 26: Carbon monoxide detectors — Point detectors;
— Part 27: Duct smoke detectors;
— Part 28: Non-resettable line type heat detectors [currently at drafting stage];
— 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 [the present document];
— Part 31: Multi-sensor fire detectors — Point detectors using a combination of smoke, carbon monoxide
and optionally heat sensors;
— Part 32: Planning, design, installation, commissioning, use and maintenance of voice alarm systems
[currently at acceptance stage].
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
Carbon monoxide (CO) is a product of the incomplete combustion of carbon-based materials. CO fire
detectors can react promptly to smouldering fires involving carbonaceous materials because CO does not
depend solely on convection, but also moves by diffusion. CO fire detectors might be better suited to
applications where other fire detection techniques are prone to false alarms, for example due to dust, steam
and cooking vapours. Detectors based on the use of CO sensors alone, are covered by EN 54-26.
Some fires may not produce a sufficient amount of CO to trigger an alarm condition from a detector
conforming to EN 54-26. These are typically free-burning, open, well-ventilated fires. The inclusion of heat
sensing combined with CO sensing can increase the sensitivity of such a detector to these types of fires.
A number of different methods for sensing CO are suitable. However, most sensors will also be influenced by
other gases and phenomena. Tests have therefore been included in the test schedule to assess cross-
sensitivity to substances normally present in the service environment that may affect the performance of the
detector.
Test Fires TF2, TF3, TF4 and TF5 from EN 54-7 have been included to verify the detection performance. TF4
and TF5 specifically demonstrate the influence of the heat sensor(s). For these Test Fires, the CO level and,
where applicable, the temperature is used as test validity criteria.
Detectors may have modes of operation, in which only one fire phenomenon is evaluated. This standard does
not include tests for additional alarm outputs corresponding to the sensing of only one fire phenomenon.
Reference should be made to other parts of EN 54, which may cover such modes of operation or outputs.
1 Scope
This European Standard specifies requirements, test methods and performance criteria for point-type multi-
sensor fire detectors for use in fire detection systems installed in and around buildings (see EN 54-1:2011),
incorporating in one mechanical enclosure at least one carbon monoxide sensor and at least one heat sensor
and where the overall fire detection performance is determined utilizing the combination of the detected
phenomena.
This European Standard provides for the assessment and verification of consistency of performance (AVCP)
of multi-sensor fire detectors using a combination of carbon monoxide and heat sensors to this EN.
Multi-sensor fire detectors using carbon monoxide and heat sensors having special characteristics suitable for
the detection of specific fire risks are not covered by this European Standard. The performance requirements
for any additional functions are beyond the scope of this standard (e.g. additional features or enhanced
functionality for which this European Standard does not define a test or assessment method).
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
1)
EN 54-5:2000 , Fire detection and fire alarm systems — Part 5: Heat detectors - Point detectors
2)
EN 54-7:2000 , Fire detection and fire alarm systems — Part 7: Smoke detectors — Point detectors using
scattered light, transmitted light or ionization
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 60068-1:2014, Environmental testing — Part 1: General and guidance (IEC 60068-1:2013)
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)
1) This document is currently impacted by the stand-alone amendment EN 54-5:2000/A1:2002.
2) This document is currently impacted by the stand-alone amendments EN 54-7:2000/A1:2002 and
EN 54-7:2000/A2:2006.
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 60068-2-78:2013, Environmental testing — Part 2-78: Tests — Test Cab: Damp heat, steady state
(IEC 60068-2-78:2012)
ISO 209:2007, Wrought aluminium and aluminium alloys — Chemical composition and forms of products —
Part 1: Chemical composition
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 54-1:2011 and the following apply.
3.1.1
CO response value
CO concentration in the proximity of the specimen at the moment that it generates an alarm signal
Note 1 to entry: When tested as described in 5.1.5.
Note 2 to entry: The response value may depend on signal processing in the detector and in the control and indicating
equipment.
3.1.2
rate-sensitive
behaviour of a detector that depends on the rate of change of CO concentration
3.2 Abbreviations
EMC electromagnetic compatibility
4 Requirements
4.1 General
In order to conform to this standard, the detector shall meet the requirements of this clause, which shall be
verified by visual inspection or engineering assessment or shall be tested as described in Clause 5 and shall
meet the requirements of the tests.
4.2 Nominal activation conditions/sensitivity
4.2.1 Individual alarm indication
Each detector shall be provided with an integral red visual indicator, by which the individual detector that
released the 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 when assessed as described in 5.2.1.
4.2.2 Rate sensitive CO response
The CO response value of the detector may depend on the rate of change of CO concentration in the vicinity
of the detector. Such behaviour may be incorporated in the detector design to improve the discrimination
between ambient CO levels and those generated by a fire. If such rate sensitive behaviour is included then it
shall not lead to a significant reduction in the detector’s sensitivity to fires, nor to a significant increase in the
probability of a false alarm when assessed as specified in 5.2.2.
4.2.3 Response to slowly developing fires
Carbon monoxide detectors may incorporate provision for "drift compensation", for example to compensate for
sensor drift due to the ageing of the CO sensor or the build-up of contaminants in the detector, If such drift
compensation is included, then it shall not lead to a significant change in the detector's sensitivity to slowly
developing fires when assessed as specified in 5.2.3.
4.2.4 Repeatability of CO response
The detector shall have stable behaviour with respect to its sensitivity to CO after a number of alarm
conditions and shall meet the requirements specified in 5.2.4.
4.2.5 Directional dependence of CO response
The sensitivity of the detector to CO shall not be unduly dependent on the direction of airflow around it and
shall meet the requirements specified in 5.2.5.
4.2.6 Directional dependence of heat response
The heat sensitivity of the detector shall not be unduly dependent on the direction of airflow around it and shall
meet the requirements specified in 5.2.6.
4.2.7 Lower limit of heat response
The detector shall not be more sensitive to heat alone, without the presence of CO, than is permitted in
EN 54-5 and shall meet the requirements specified in 5.2.7.
4.2.8 Reproducibility of CO response
The sensitivity of the detector to CO shall not vary unduly from specimen to specimen and shall meet the
requirements specified in 5.2.8.
4.2.9 Reproducibility of heat response
The heat sensitivity of the detector shall not vary unduly from specimen to specimen and shall meet the
requirements specified in 5.2.9.
4.2.10 Air movement
The sensitivity of the detector to CO shall not be unduly affected by the rate of the airflow and shall meet the
requirements specified in 5.2.10.
4.3 Operational reliability
4.3.1 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.
4.3.2 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.
4.3.3 Manufacturer's adjustments
It shall be possible to change the manufacturer's settings only by special means (e.g. the use of a special
code or tool) or by breaking or removing a seal.
4.3.4 On-site adjustment of behaviour
If there is provision for on-site adjustment of the response behaviour of the detector then:
— for each setting at which the manufacturer claims compliance with this standard, the detector shall
conform to 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;
— 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 conform to the standard.
These adjustments may be carried out on the detector or at the control and indicating equipment.
4.3.5 Software-controlled detectors
4.3.5.1 General
For detectors which rely on software control in order to fulfil the requirements of this standard, the
requirements of 4.3.5.2, 4.3.5.3 and 4.3.5.4 shall be met.
4.3.5.2 Software documentation
4.3.5.2.1 Design overview
Documentation shall be submitted that 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 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.
4.3.5.2.2 Design detail
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).
4.3.5.3 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.
4.3.5.4 The storage of programs and data
The program necessary to conform to this standard and any pre-set data, such as manufacturer's settings,
shall be held in non-volatile memory.
...