SIST EN 54-22:2015+A1:2020
(Main)Fire detection and fire alarm systems - Part 22: Resettable line-type heat detectors
Fire detection and fire alarm systems - Part 22: Resettable line-type heat detectors
This European Standard applies to resettable line-type heat detectors consisting of a sensing element using an optical fibre, a pneumatic tube or an electrical sensor cable connected to a sensor control unit, either directly or through an interface module, intended for use in fire detection and fire alarm systems installed in and around buildings and other civil engineering works (see EN 54-1:2011).
This European Standard specifies the requirements and performance criteria, the corresponding test methods and provides for the Assessment and Verification of Constancy of Performance (AVCP) of resettable line-type heat detectors to this EN.
This European Standard also covers resettable line-type heat detectors intended for use in the local protection of plant and equipment.
Resettable line-type heat detectors with special characteristics and developed for specific risks are not covered by this EN.
This European Standard does not cover line-type heat detectors that are based on non-resettable, fixed temperature electrical cables (so called digital systems).
Brandmeldeanlagen - Teil 22: Rücksetzbare linienförmige Wärmemelder
Diese Europäische Norm ist anzuwenden für rücksetzbare linienförmige Wärmemelder mit einem Sensorelement basierend auf einem Lichtwellenleiter, einem pneumatischen Fühlerrohr oder einem elektrischen Sensorkabel, welches mit einer Auswerteeinheit entweder direkt oder über ein Interface-Modul verbunden ist, zur Verwendung in Brandmeldeanlagen, die innerhalb und außerhalb von Hoch- und Tiefbauten installiert sind (siehe EN 54 1:2011).
Diese Europäische Norm legt Anforderungen und Leistungskriterien sowie die entsprechenden Prüfverfahren fest und behandelt die Bewertung und Überprüfung der Leistungsbeständigkeit (AVCP) von rücksetzbaren linienförmigen Wärmemeldern.
Außerdem gilt diese Europäische Norm auch für rücksetzbare linienförmige Wärmemelder, die zur Einrichtungsüberwachung von Anlagen und Einrichtungen vorgesehen sind.
Rücksetzbare linienförmige Wärmemelder, die spezielle Eigenschaften haben und für Fälle mit besonderen Risiken entwickelt wurden, sind nicht Gegenstand dieser EN.
Diese Europäische Norm ist nicht anzuwenden für nicht-rücksetzbare linienförmige Wärmemelder basierend auf elektrischen Kabeln mit festgelegter Temperatur (so genannte „digitale“ Systeme).
Systèmes de détection et d'alarme incendie - Partie 22 : Détecteurs de chaleur de type linéaire réenclenchables
La présente Norme européenne s'applique aux détecteurs de chaleur de type linéaire réenclenchables qui comprennent un élément capteur utilisant une fibre optique, un tube pneumatique ou un câble électrique capteur raccordé à une unité de commande, de manière directe ou via un module d'interface, destiné à être utilisé dans les systèmes de détection et d'alarme incendie installés dans et autour des bâtiments et d'autres ouvrages de génie civil (voir EN 54-1:2011).
La présente Norme européenne spécifie les exigences et les critères de performance, les méthodes d'essai correspondantes et prévoit l'évaluation et la vérification de la constance des performances (EVCP) des détecteurs de chaleur de type linéaire réenclenchables par rapport à la présente EN.
La présente Norme européenne couvre également les détecteurs de chaleur de type linéaire réenclenchables destinés à être utilisés pour la protection ponctuelle d’installations et d'équipements.
Les détecteurs de chaleur de type linéaire réenclenchables possédant des caractéristiques particulières, conçus pour des risques spéciaux, ne sont pas couverts par la présente EN.
La présente Norme européenne ne couvre pas les détecteurs de chaleur de type linéaire qui sont basés sur des câbles électriques à température fixe, non réenclenchables (appelés systèmes « numériques »).
Sistemi za odkrivanje in javljanje požara ter alarmiranje - 22. del: Linijski toplotni javljalniki z možnostjo ponastavitve
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2020
Nadomešča:
SIST EN 54-22:2015
Sistemi za odkrivanje in javljanje požara ter alarmiranje - 22. del: Linijski toplotni
javljalniki z možnostjo ponastavitve
Fire detection and fire alarm systems - Part 22: Resettable line-type heat detectors
Brandmeldeanlagen - Teil 22: Rücksetzbare linienförmige Wärmemelder
Systèmes de détection et d'alarme incendie - Partie 22 : Détecteurs de chaleur de type
linéaire réenclenchables
Ta slovenski standard je istoveten z: EN 54-22:2015+A1:2020
ICS:
13.220.20 Požarna zaščita 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.
EN 54-22:2015+A1
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2020
EUROPÄISCHE NORM
ICS 13.220.20; 13.220.10 Supersedes EN 54-22:2015
English Version
Fire detection and fire alarm systems - Part 22: Resettable
line-type heat detectors
Systèmes de détection et d'alarme incendie - Partie 22 : Brandmeldeanlagen - Teil 22: Rücksetzbare
Détecteurs de chaleur de type linéaire réenclenchables linienförmige Wärmemelder
This European Standard was approved by CEN on 19 March 2015 and includes Amendment 1 approved by CEN on 16 October
2019.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 54-22:2015+A1:2020 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviations . 8
3.1 Terms and definitions . 8
3.2 Abbreviations . 9
4 Product characteristics . 9
4.1 General . 9
4.2 Nominal activation conditions/sensitivity . 11
4.3 Operational reliability . 11
4.4 Tolerance to supply voltage . 13
4.5 Performance parameters under fire conditions . 14
4.6 Durability of nominal activation conditions/sensitivity . 14
5 Testing, assessments and sampling methods . 16
5.1 General . 16
5.2 Test procedures nominal activation conditions/sensitivity . 20
5.3 Test procedures operational reliability. 21
5.4 Tolerance to supply voltage . 22
5.5 Performance parameters under fire conditions . 23
5.6 Durability of nominal activation conditions/sensitivity . 27
6 Assessment and verification of constancy of performance (AVCP) . 48
6.1 General . 48
6.2 Type testing . 48
6.3 Factory production control (FPC) . 50
7 Classification . 55
8 Marking, labelling and packaging . 55
8.1 General . 55
8.2 Marking of sensor control unit . 55
8.3 Marking of sensing element . 56
8.4 Marking of functional units . 56
Annex A (normative) Arrangement of the sensing element in the fire test room . 57
A.1 General . 57
A.2 Fire test room arrangement . 57
A.3 Sensing element outside the fire test room . 57
Annex B (normative) Flaming liquid test fires (TF6F, TF6 and TF6S) . 59
B.1 General . 59
B.2 Arrangement . 59
B.3 Ignition . 59
B.4 End of test condition . 59
B.5 Test validity criteria . 60
Annex C (normative) Test arrangement for the sensing element of linear heat detector in
the heat tunnel . 61
C.1 General . 61
C.2 Test arrangement for the sensing element . 61
Annex D (informative) Apparatus for mounting of the sensing element of linear heat
detector in the heat tunnel . 62
D.1 General . 62
D.2 Test apparatus . 62
Annex E (normative) Mounting of the sensing element of multipoint RLTHD in the heat
tunnel . 63
E.1 General . 63
E.2 Mounting arrangement of multipoint sensing element . 63
Annex F (normative) Heat tunnel for response time and response temperature
measurements . 65
F.1 General . 65
F.2 Description of the heat tunnel . 65
Annex G (informative) Construction of the heat tunnel . 66
G.1 General . 66
G.2 Heat tunnel construction . 66
Annex H (normative) Test arrangement for vibration tests for sensing element . 68
H.1 General . 68
H.2 Test setup . 68
Annex I (normative) Test apparatus for impact test on the sensing element . 69
I.1 General . 69
I.2 Test apparatus . 69
I.3 Test setup . 69
Annex J (informative) Data supplied with resettable line-type heat detectors . 72
Bibliography . 74
European foreword
This document (EN 54-22:2015+A1:2020) 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 August 2020, and conflicting national standards shall
be withdrawn at the latest by August 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes !EN 54-22:2015".
This document includes Amendment 1, approved by CEN on 2019-10-16.
The start and finish of text introduced or altered by amendment is indicated in the text by tags !".
!deleted text"
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 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: Resettable 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 (in preparation)
Part 27: Duct smoke detectors (in preparation)
Part 28: Non-resettable line-type heat detectors (in preparation)
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 organisations of the
following countries are bound to implement this European Standard: 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, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Introduction
Resettable line-type heat detectors (RLTHD) have been incorporated into fire alarm systems for a
considerable number of years. These detectors are typically used in areas where point type heat
detectors are presented with challenging environmental characteristics and also where access to the
detectors may significantly influence the fire alarm system design.
This standard defines the minimum system functionality for RLTHD products. RLTHD are based upon
many unique operating principles. It is the intention of this standard to define common operating
characteristics for each type of RLTHD in conjunction with existing EN 54 detector standards, so that
resettable line-type heat detectors have a response behaviour comparable to that of point type heat
detectors.
Due to the various applications for RLTHD, it is necessary to devise separate environmental
classification tests for the sensing element and the sensor control units of these systems. It is not the
purpose of this standard to define applications or how RLTHD should be used in applications. However,
the standard indicates two general fields of application, room protection and secondly local protection.
The standard defines separate response test classifications for these two fields.
Generally there are two functional principles employed by RLTHD: non-integrating and integrating
systems. Therefore separated subclasses have been created for non integrating systems and for
integrating systems.
1 Scope
This European Standard applies to resettable line-type heat detectors consisting of a sensing element
using an optical fibre, a pneumatic tube or an electrical sensor cable connected to a sensor control unit,
either directly or through an interface module, intended for use in fire detection and fire alarm systems
installed in and around buildings and other civil engineering works (see EN 54-1:2011).
This European Standard specifies the requirements and performance criteria, the corresponding test
methods and provides for the Assessment and Verification of Constancy of Performance (AVCP) of
resettable line-type heat detectors to this EN.
This European Standard also covers resettable line-type heat detectors intended for use in the local
protection of plant and equipment.
Resettable line-type heat detectors with special characteristics and developed for specific risks are not
covered by this EN.
This European Standard does not cover line-type heat detectors that are based on non-resettable, fixed
temperature electrical cables (so called “digital” systems).
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 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 60068-1:1994, 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 60068-2-27:2009, Environmental testing — Part 2-27: Tests — Test Ea and guidance: Shock (IEC
60068-2-27:2009)
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 60068-2-6:2008, Environmental testing — Part 2-6: Tests — Test Fc: Vibration (sinusoidal) (IEC
60068-2-6:2008)
EN 60068-2-75:1997, Environmental testing — Part 2-75: Tests — Test Eh: Hammer tests (IEC 60068-2-
75:1997)
EN 60068-2-78:2001, Environmental testing — Part 2-78: Tests — Test Cab: Damp heat, steady state (IEC
60068-2-78:2001)
3 Terms, definitions and abbreviations
For the purposes of this document the terms and definitions given in EN 54-1:2011 and the following
apply.
3.1 Terms and definitions
3.1.1
functional unit
part of a line-type heat detector in addition to the sensor control unit and the sensing element which is
essential for the function of the line-type heat detector
EXAMPLE Terminating device, filter, switch.
3.1.2
integrating line-type heat detector
detectors for which the response to temperature is summed in some way, (not necessarily linearly),
along a length of the sensing element. For such detectors, the output to the sensor control unit is
therefore a function of the temperature distribution along the length of the sensing element
EXAMPLE Pneumatic systems.
3.1.3
linear line-type heat detector
detectors which respond to heat applied to any point along the length of the sensing element
3.1.4
line-type heat detector
LTHD
detector which responds to heat sensed in the vicinity of a continuous line
Note 1 to entry: A line-type heat detector may consist of a sensor control unit, a sensing element and functional
units.
3.1.5
local protection application
application in which the sensing element is installed in relatively close proximity to the potential fire
risk
EXAMPLE pipelines, conveyor belts, combustion engines/turbines, rolling stock, transformers, process
dryers, cable trays, escalators, chemical process equipment, electrical equipment cabinets, ventilation systems
(dust collector, hood extractor, etc.), switch gear (e.g. printing press), etc.
3.1.6
multipoint line-type heat detector
detectors that contain multiple discrete temperature sensors, which are separated by a distance of no
more than 10 m, embedded within the sensing element (see 3.1.11)
3.1.7
non-resettable line-type heat detectors
NLTHD
LTHD which can only respond once
3.1.8
non-integrating line-type heat detector
detectors for which the output signal is depending on local temperature effects but not on the
integration of the whole temperature distribution along the sensing element
EXAMPLE Fibre optics systems.
3.1.9
resettable line-type heat detectors
RLTHD
LTHD which is able to return to its quiescent condition after a response
3.1.10
room protection application
application in which the sensing element is installed at a distance from the potential fire hazard close to
the ceiling or roof of the area to be protected
EXAMPLE car parks (open or closed), road/rail/metro tunnels, floor/ceiling voids, elevator shafts, cold
stores, warehouses, heritage buildings, aircrafts hangars, spray shops, chemical storehouses, ammunition depots,
refineries, silos, etc.
3.1.11
sensing element
heat sensing part of the line-type heat detector which can be a fibre optic cable, a pneumatic tube or an
electrical cable
Note 1 to entry: A sensing element may consist of different segments separated e.g. by functional units or
splices.
3.1.12
sensor control unit
unit that supervises the sensing element and communicates to the control and indicating equipment
Note 1 to entry: The unit can be remote or an integral part of the control and indicating equipment as defined
by EN 54-2.
3.2 Abbreviations
For the purposes of this document the following abbreviation apply:
RLTHD resettable line-type heat detector.
4 Product characteristics
4.1 General
4.1.1 Compliance
In order to comply with this standard, resettable line-type heat detectors shall meet the provisions of
Clause 4, which shall be verified by visual inspection or engineering assessment as described in Clause 5
and shall meet the requirements of the tests.
4.1.2 Heat response classes
4.1.2.1 Heat response for room protection application
For room protection application the heat response of RLTHD is classified as indicated in Table 1.
NOTE Test fires TF6S, TF6 and TF6F are specified in Annex B.
Table 1 —Heat response, room protection for integrating and non-integrating RLTHD
Heat response Typical Maximu Minimum Maximum TF6S TF6 TF6F
class appli- m appli- static static
response time response time response time
cation cation response response
tempera- tempera- tempera- tempera-
non- Integra- Lower Upper Lower Upper Lower Upper
ture ture ture ture
integra- ting value value value value value value
°C °C
ting RLTHD °C °C s s s s s s
RLTHD
A1N A1I 25 50 54 65 50 400 30 210 20 130
A2N A2I 25 50 54 70 120 600 60 300 40 180
4.1.2.2 Heat response for local protection application
For local protection application the heat response of the RLTHD is classified as indicated in Table 2.
Table 2 —Heat response local protection for integrating and non-integrating RLTHD
Heat response class Typical Maximum Minimum static Maximum static
application application response response
non-integra- Integrating
temperature temperature temperature temperature
ting RLTHD RLTHD
°C °C °C °C
BN BI 40 65 69 85
CN CI 55 80 84 100
DN DI 70 95 99 115
EN EI 85 110 114 130
FN FI 100 125 129 145
GN GI 115 140 144 160
4.1.3 Environmental groups
Different environmental groups are necessary to reflect the different service environment of the
components of a line-type heat detector:
The sensing element is in either environmental group II or III.
The sensor control unit and the functional unit are in either environmental group I, II or III.
NOTE Environmental group I covers equipment likely to be installed indoors in commercial/industrial
premises but for which the avoidance of extreme environmental conditions can be taken into account in the
selection of the mounting site. Environmental group II covers equipment likely to be installed indoors in
commercial/industrial premises in all general areas. Environmental group III covers equipment which is intended
to be installed out of doors.
4.2 Nominal activation conditions/sensitivity
4.2.1 Individual alarm indication
Each sensor control unit shall be provided with an integral red visual indicator, by which the general
alarm condition can be identified, until the alarm condition is reset. Where other conditions of the
sensor control unit can be visually indicated, they shall be clearly distinguishable from the alarm
indication, except when the sensor control unit is switched into a service mode. The visual indicator
shall be visible from a distance of 6 m in the direct line of sight perpendicular to the surface, in an
ambient light intensity up to 500 lux.
If more than one sensing element is connected to the sensor control unit, there shall be a separate alarm
indication for each sensing element.
To confirm this, the detector shall be assessed in accordance with 5.2.1.
4.2.2 Signalling
The line-type heat detector shall signal the alarm and fault status to the control and indicating
equipment.
If more than one sensing element is connected to a sensor control unit, there shall be separate alarm
and fault signals for each sensing element.
To confirm this, the detector shall be assessed in accordance with 5.2.2.
4.2.3 Repeatability
The ratio of response times of the RLTHD shall be within the limits, even after a number of alarm
conditions, as specified in 5.2.3.
4.2.4 Reproducibility
The ratio of response times of several specimens of the RLTHD shall be within the limits as specified in
5.2.4.
4.3 Operational reliability
4.3.1 Connection of ancillary devices
Where the RLTHD provides for connections to ancillary devices (e.g. remote indicators, RS 485
interface), open or short-circuit failures of these connections shall not prevent the correct operation of
the RLTHD.
Where such connections are present the detector shall be assessed in accordance with 5.3.1.
4.3.2 Manufacturer's adjustments
It shall not be possible to change the manufacturer's settings except by special means (e.g. the use of a
key, a code or a special tool or by breaking or removing a seal).
To confirm this, the detector shall be assessed in accordance with 5.3.2.
4.3.3 Requirements for software controlled detectors
4.3.3.1 General
For RLTHD, which rely on software control in order to fulfil the requirements of this standard, the
requirements of 4.3.3.2, 4.3.3.3 and 4.3.3.4 shall be met.
4.3.3.2 Software documentation
4.3.3.2.1 The manufacturer shall submit documentation, which gives an overview of the software
design. This documentation shall provide sufficient detail for the design to be inspected for compliance
with this standard and shall include the following as a minimum:
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,
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.
4.3.3.2.2 The manufacturer shall have available detailed design documentation, which only needs to be
provided if required by the testing laboratory. 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).
4.3.3.3 Software design
In order to ensure the reliability of the RLTHD, 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.
4.3.3.4 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 possible during
normal operation of the RLTHD.
Site-specific data shall be held in memory which will retain data for at least two weeks without external
power to the detector, unless provision is made for the automatic renewal of such data, following loss of
power, within 1 h of power being restored.
To confirm this, the detector shall be assessed in accordance with 5.3.3.
4.3.4 Sensing element fault
The RLTHD shall generate fault conditions as specified in 5.3.4.
4.3.5 On-site adjustment of response behaviour
The effective response behaviour of a RLTHD is dependent upon both the sensitivity settings of the
sensor control unit and the heat sensing element. Many types of RLTHD therefore have facilities to
adjust the sensitivity of the RLTHD to suit the application.
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;
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 can be carried out at the sensor control unit or at the control and indicating
equipment.
To confirm this, the detector shall be assessed in accordance with 5.3.5.
4.3.6 Maximum ambient temperature test (sensing element)
The RLTHD shall function correctly even if the sensing element is exposed to high ambient
temperatures as specified in 5.3.6.
4.4 Tolerance to supply voltage
4.4.1 Variation in supply parameters
The RLTHD shall function correctly within the specified range(s) of the supply parameters as specified
in 5.4.1.
4.4.2 Low voltage fault
The RLTHD shall signal a fault condition when its input power supply falls below the minimum voltage
specified by the manufacturer as specified in 5.4.2.
4.5 Performance parameters under fire conditions
4.5.1 Fire sensitivity for room protection application
Heat response Class A1N, A1I, A2N and A2I RLTHD (for room protection application) shall have an
adequate sensitivity to the heat release of a real test fire as required for general application in fire
detection systems as specified in 4.1.2.1 and tested as specified in 5.5.1.
4.5.2 Static response temperature test
The RLTHD shall have, depending on its classification, an adequate sensitivity to a slow rate of rise of
temperature as specified in 4.1.2.2 and tested as specified in 5.5.2.
The RLTHD shall also be capable of alarming when temperature rise is very slow and generate the
alarm within a temperature range specified for its class.
4.6 Durability of nominal activation conditions/sensitivity
4.6.1 Temperature resistance
4.6.1.1 Dry heat (operational) sensor control unit
The sensor control unit of the RLTHD shall function correctly, at high ambient temperatures as specified
in 5.6.1.1.
4.6.1.2 !Dry heat (endurance) for sensor control unit and sensing element
The sensor control unit and the sensing element of the RLTHD shall be capable of withstanding long
term exposure to high temperature as specified in 5.6.1.2."
4.6.1.3 Cold (operational) for sensing element
The RLTHD shall function correctly even if the sensing element is exposed to low ambient temperatures
as specified in 5.6.1.3.
4.6.1.4 Cold (operational) for sensor control unit
The sensor control unit of the RLTHD shall function correctly at low ambient temperatures as specified
in 5.6.1.4.
4.6.2 Humidity resistance
4.6.2.1 Damp heat, steady state (endurance) for sensor control unit and sensing element
The RLTHD shall be capable of withstanding long term exposure to a high level of continuous humidity
as specified in 5.6.2.1.
4.6.2.2 Damp heat, cyclic (operational) for sensing element
The RLTHD shall function correctly even if the sensing element is exposed to a high level of humidity as
specified in 5.6.2.2.
4.6.2.3 Damp heat, cyclic (operational) for sensor control
The sensor control unit of the RLTHD shall function correctly at a high level of humidity as specified in
5.6.2.3.
4.6.2.4 Damp heat, steady state (operational) for sensor control unit
The sensor control unit of the RLTHD shall function correctly at a high level of humidity as specified in
5.6.2.4.
4.6.2.5 Damp heat, cyclic (endurance) for sensor control unit and sensing element
The RLTHD shall be capable withstanding the effect of cyclic humidity levels as specified in 5.6.2.5.
4.6.3 Shock and vibration resistance
4.6.3.1 Shock (operational) for sensor control unit
The sensor control unit of the RLTHD shall operate correctly when submitted to mechanical shocks as
specified in 5.6.3.1.
4.6.3.2 Impact (operational) for sensor control unit
The sensor control unit of the RLTHD shall operate correctly when submitted to mechanical impacts as
specified in 5.6.3.2.
4.6.3.3 Impact (operational) for sensing element
The RLTHD shall function correctly even if the sensing element is submitted to mechanical impacts as
specified in 5.6.3.3.
4.6.3.4 Vibration, sinusoidal (operational) for sensor control unit
The sensor control unit of the RLTHD shall operate correctly when submitted to sinusoidal vibration as
specified in 5.6.3.4.
4.6.3.5 Vibration, sinusoidal (operational) for sensing element
The RLTHD shall function correctly even if the sensing element is submitted to sinusoidal vibration as
specified in 5.6.3.5.
4.6.3.6 Vibration, sinusoidal (endurance) for sensor control unit
The sensor control unit of the RLTHD shall be capable of withstanding the effect of sinusoidal vibration
as specified in 5.6.3.6.
4.6.3.7 Vibration, sinusoidal (endurance) for sensing element
The sensing element of the RLTHD shall be capable of withstanding the effect of sinusoidal vibration as
specified in 5.6.3.7.
4.6.4 Corrosion resistance
4.6.4.1 Sulphur dioxide (SO ) corrosion (endurance) for sensing element
The sensing element of the RLTHD shall be capable of withstanding exposure to an SO corrosive
atmosphere as specified in 5.6.4.1.
4.6.4.2 Sulphur dioxide (SO ) corrosion (endurance) for sensor control unit
The sensor control unit of the RLTHD shall be capable of withstanding exposure to an SO corrosive
atmosphere as specified in 5.6.4.2.
4.6.5 Electrical stability
4.6.5.1 Electromagnetic immunity
The RLTHD shall operate correctly when submitted to electromagnetic interference as specified in
5.6.5.1.
5 Testing, assessments and sampling methods
5.1 General
5.1.1 Atmospheric conditions for tests
Unless otherwise stated in a test procedure, the testing shall be carried out after the test specimen has
been allowed to stabilize in the standard atmospheric conditions for testing as specified in EN 60068-
1:1994 as follows:
a) temperature: (15 to 35) °C;
b) relative humidity: (25 to 75) %;
c) air pressure: (86 to 106) kPa.
If variations in these parameters have a significant effect on a measurement, then such variations
should be kept to a minimum during a series of measurements carried out as part of one test on one
specimen.
5.1.2 Operating conditions for tests
If a test method requires a specimen to be operational, then the specimen shall be connected to suitable
supply and monitoring equipment, with characteristics as required by the manufacturer's data. Unless
otherwise specified in the test method, 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 normally be the nominal value, or the mean of the specified range. If a
test procedure requires a specimen to be monitored to detect any alarm or fault signals, then
connections shall be made to any necessary ancillary devices (e.g. through wiring to an end-of-line
device for conventional detectors to allow a fault signal to be recognized).
The details of the supply and monitoring equipment and the alarm criteria used should be given in the
test report.
5.1.3 Mounting arrangements
Unless otherwise stated, the specimen shall be mounted by its normal means of attachment in
accordance with the manufacturer's instructions. If these instructions describe more than one method
of mounting, then the method considered to be most unfavourable shall be chosen for each test.
5.1.4 Tolerances
Unless otherwise stated, the tolerances for the environmental test parameters shall be as specified in
the basic reference standards for the test (e.g. the relevant part of EN 60068).
If a specific tolerance or deviation limit is not specified in a requirement or test procedure, then a
deviation limit of ± 5 % shall be applied.
5.1.5 Procedure for measurement of response time
5.1.5.1 General
The purpose of this procedure is to establish any deviation in system response time following the
environmental tests.
The specimen shall be connected to a suitable supply and monitoring equipment in accordance with
5.1.2.
The response time of the RLTHD shall be measured using the heat tunnel described in Annex F.
The orientation of the sensing element in the heat tunnel shall be chosen arbitrarily and shall be the
same for each measurement.
Before the measurement, stabilize the temperature of the air stream and the section of sensing element
to be heated at a typical application temperature according to 4.1.2 unless otherwise specified. The
measurement is then made by increasing the air temperature in the tunnel, linearly with respect to time
and at the rate of rise specified in the applicable test procedure, until the supply and monitoring
equipment indicates an alarm.
During the measurement, the airflow in the tunnel shall be maintained at a constant mass flow,
equivalent to (0,8 ± 0,1) m/s at 25 °C. The air temperature shall be controlled to within ± 2 K of the
nominal temperature required at any time during the test.
The response time, t, shall be measured from the moment the temperature starts increasing to the
indication of an alarm from the supply and monitoring equipment.
NOTE 1 Linear extrapolation of the stabilized and the increasing temperature against time lines can be used to
establish the effective start time of the temperature increase.
NOTE 2 It is advised to take care not to subject detectors to a damaging thermal shock when transferring them
to and from a stabilized or alarm temperature.
5.1.5.2 Linear heat detectors
For measurement of the response time of linear heat detectors, the length of sensing element, L which
shall be connected to the sensor control unit shall be chosen to be the worst case for the technology
employed. This shall be agreed between the manufacturer and the testing laboratory.
NOTE 1 It is advised to determine the worst case taking into account the effect on the temperature
measurement of noise and l
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