prEN 54-22

SLOVENSKI STANDARD
01-junij-2007
Sistemi za odkrivanje in javljanje požara ter alarmiranje - 22. del: Linijski toplotni
javljalniki
Fire detection and fire alarm system - Part 22: Line type heat detectors
Brandmeldeanlagen - Teil 22: Linienförmige Wärmemelder
Systemes de détection et d'alarme incendie - Partie 22: Détecteurs linéaires de chaleur
Ta slovenski standard je istoveten z: prEN 54-22
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
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2007
ICS 13.220.20
English Version
Fire detection and fire alarm system - Part 22: Line type heat
detectors
Systèmes de détection et d'alarme incendie - Partie 22: Brandmeldeanlagen - Teil 22: Linienförmige Wärmemelder
Détecteurs linéaires de chaleur
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 Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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: rue de Stassart, 36  B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 54-22:2007: E
worldwide for CEN national Members.

Contents Page
Foreword.4
Introduction .5
1 Scope .5
2 Normative references .5
3 Terms, definitions and abbreviations.6
3.1 Terms and definitions .6
3.2 Abbreviations.7
4 Requirements.8
4.1 Compliance.8
4.2 Classification.8
4.3 Environmental groups.9
4.4 General detector requirements .10
5 Tests.14
5.1 General.14
5.2 Repeatability.18
5.3 Reproducibility.18
5.4 Variation in supply voltage .19
5.5 Fire sensitivity for room protection application .19
5.6 Static response temperature test.21
5.7 Dry heat (operational) test for sensor control units.24
5.8 Maximum ambient temperature test (sensing element) .25
5.9 Dry heat (endurance) for sensing elements.26
5.10 Cold (operational) for sensing element.27
5.11 Cold (operational) for sensor control unit .28
5.12 Damp heat, steady state (endurance) for sensor control unit and sensing element .30
5.13 Damp heat, cyclic (operational) test for sensing element.31
5.14 Damp heat, cyclic (operational) for sensor control unit.32
5.15 Damp heat, cyclic (endurance) test for sensor control unit and sensing element.34
5.16 Sulphur dioxide (SO ) corrosion (endurance) test for sensing element.35
5.17 Sulphur dioxide (SO ) corrosion (endurance) test for sensor control unit .36
5.18 Shock (operational) test for sensor control unit .38
5.19 Impact (operational) test for sensor control unit .39
5.20 Impact (operational) test for sensing element.40
5.21 Vibration, sinusoidal, (operational) test for sensor control unit .41
5.22 Vibration, sinusoidal, (operational) for sensing element .43
5.23 Vibration, sinusoidal (endurance) for sensor control unit .44
5.24 Vibration, sinusoidal, (endurance) for sensing element.45
5.25 Electromagnetic Compatibility (EMC), Immunity tests (operational).46
5.26 Sensing element fault test .47
5.27 Low voltage fault (sensor control unit with external power supply).47
Annex A (normative) Arrangement of the sensing element in the fire test room .49
A.1 Fire test room arrangement.49
A.2 Sensing element outside the fire test room.50
Annex B (informative) Flaming liquid test fires (TF6F, TF6 and TF6S).51
B.1 Arrangement.51
B.2 Ignition .51
B.3 End of test condition .51
B.4 Test validity criteria .52
Annex C (normative) Test arrangement for the sensing element of linear heat detector in the heat
tunnel.53
Annex D (informative) Apparatus for mounting of the sensing element of linear heat detector in
the heat tunnel .54
Annex E (normative) Mounting of the sensing element of multipoint LTHD in the heat tunnel.55
Annex F (normative) Heat tunnel for response time and response temperature measurements .57
Annex G (informative) Construction of the heat tunnel .58
Annex H (normative) Test arrangement for vibration tests for sensing element.60
H.1 Test setup.60
Annex I (normative) Test apparatus for impact test on the sensing element .61
I.1 Test setup.61
Annex J (informative) Information concerning fire tests for road tunnels .64
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of the EU Construction Products Directive (89/106/EEC) .65
ZA.1 Scope and relevant clauses .65
ZA.2 Procedures for the attestation of conformity of control and indicating equipment covered
by this standard.66
ZA.4 EC certificate and declaration of conformity.72

Foreword
This document (prEN 54-22:2007) 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 has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
EN 54 "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: 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
Introduction
Line type heat detectors (LTHD) 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 LTHD products. LTHD are based upon many
unique operating principles. It is the intention of this standard to define common operating characteristics for
each type of LTHD in conjunction with existing EN 54 detector standards, so that line type heat detectors have
a response behaviour comparable to that of point type heat detectors.
Due to the various applications for LTHD, 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 LTHD 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 LTHD: non-integrating and integrating systems.
Therefore the subclasses A1N, A2N, BN, … GN have been created for non integrating systems and the
subclasses A1I, A2I, BI, … GI have been created for integrating systems.
1 Scope
This European Standard applies to LTHD consisting of a sensing element using an optical fibre, a pneumatic
tube or an electrical sensor cable connected to a sensor control unit, or either directly or through an interface
module to a control and indicating equipment intended for use in fire detection and fire alarm systems installed
in buildings and tunnels.
This standard also covers LTHD intended for use in the local protection of plants and machinery.
LTHD with special characteristics and developed for specific risks are not covered by this standard.
This standard specifies the requirements and performance criteria. This standard specifies the corresponding
test methods and the evaluation of conformity of the product to the 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.
EN 54-1:1996, Fire detection and fire alarm systems — Part 1: Introduction
EN 54-2:1997+A1:2006, Fire detection and fire alarm systems — Part 2: Control and indicating equipment
EN 54-4:1997+A1:2002+A2:2006, Fire detection and fire alarm systems — Part 4: Power supply equipment
EN 54-5:2000+A1:2002; Fire detection and fire alarm systems —Part 5: Point-type heat detectors
EN 54-7:2000+A1:2002+A2:2006; Fire detection and fire alarm systems —Part 7: Point-type smoke detectors
EN 50130-4:1995+A1:1998+A2:2003, Alarm systems — Part 4: Electromagnetic compatibility — Product
family standard: immunity requirements for components of fire, intruder and social alarm systems
EN 60068-1:1994, Environmental testing - Part 1: General and guidance
EN 60068-2-2:1993 +A1:1993, Environmental testing – Part 2: Tests; tests B: dry heat
EN 60068-2-1:1993+A1:1993+A2:1994, Environmental testing – Part 2: Tests; tests Ab: cold
EN 60068-2-78:2001, Environmental testing – Part 2-78: Tests, Test Cab: Damp heat, steady state
EN 60068-2-30:2005, Environmental testing – Part 2-30: Variant 1 test cycle and controlled recovery
conditions: Damp heat, cyclic
EN 60068-2-78:2001, Environmental testing – Part 2-78: Tests, Test Cab: Damp heat, steady state
EN 60068-2-42:2003, Environmental testing – Part 2-42: Tests, Test Kc: Sulphur dioxide, steady state
EN 60068-2-27:1993, Environmental testing – Part 2-27: Tests, Test Ea: shock
EN 60068-2-75:1997, Environmental testing – Part 2-75: Tests, Test Eh for test Ehb: impact
EN 60068-2-6:1995, Environmental testing – Part 2: Tests - Test Fc: Vibration, sinusoidal
EN 9001:2000, Quality management systems – Requirements (ISO 9001: 2000)
3 Terms, definitions and abbreviations
For the purposes of this document the terms and definitions given in EN 54-1:1996 and the following apply.
3.1 Terms and definitions
3.1.1
analogue detector
detectors, the sensing element of which, produces an output signal functionally related to the heat sensed.
3.1.2
digital detector
detectors, the sensing element of which can be either of two states: standby or alarm. The alarm threshold is
inherent to the cable construction.
3.1.3
functional unit
part of a line type heat detector beside 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
3.1.3
integrating detector
detectors where 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, analogue detectors
3.1.4
linear heat detector
detectors which respond to heat applied to any point along the length of the sensing element.
3.1.5
line type heat detector (LTHD)
detector which responds to heat sensed in the vicinity of a continuous line. A line type heat detector may
consist of a sensor control unit, a sensing element and functional units. There are two subtypes: Linear heat
detectors and multipoint heat detectors
3.1.6
local protection application
application where the sensing element is installed in relatively close proximity to the potential fire risk.
NOTE Examples of local protection applications could be pipelines, conveyor belts, combustion engines/turbines,
rolling stocks, transformer, process dryers, cable trays, escalators, chemical process equipment, electrical equipment
cabinets, ventilation system (dust collector, hood extractor, etc.), switch gear (e.g. printing press).
3.1.7
multipoint heat detector
detectors that contain multiple discrete temperature sensors, separated by a distance of no more than 10 m,
embedded within a sensing element
3.1.8
non-integrating 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, digital detectors
3.1.9
room protection application
application where 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
NOTE Examples of room protection applications could be 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.
3.1.10
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
3.1.11
sensor control unit
unit that supervises the sensing element and communicates to the control and indicating equipment. 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 standard, the following abbreviations apply:
LTHD line type heat detector
4 Requirements
4.1 Compliance
In order to comply with this standard the LTHD shall meet the requirements of this clause, which shall be
verified by visual inspection or engineering assessment, shall be tested as described in clause 5 and shall
meet the requirements of the tests.
4.2 Classification
4.2.1 Heat response for room protection application
LTHD for room protection shall comply at least to one heat response class of Table 1 or Table 2.
Table 1 — Heat response, room protection for non-integrating LTHD
Heat Typical Maximum Minimum Maximum TF 6S TF 6 TF 6F
response application application static static
response time response time response time
class temp- temp- response response
Lower Upper Lower Upper Lower Upper
erature erature temperature temperature
value value value value value value
(°C) (°C) (°C) (°C)
(s) (s) (s) (s) (s) (s)
A1N 25 50 54 65 50 400 30 210 20 130
A2N 25 50 54 70 120 600 60 300 40 180
NOTE For non-integrating LTHD the static response temperature test is performed with a part of 10 m of sensing
element and the max ambient temperature test (to test the maximum application temperature) is performed with the
maximum length of sensing element as specified by the manufacturer.

Table 2 — Heat response, room protection for integrating LTHD
Heat Typical Maximum Minimum Maximum TF 6S TF 6 TF 6F
response application application static static response time response time response time
class temp- temp- response response
Lower Upper Lower Upper Lower Upper
erature erature temperature temperature
value value value value value value
(°C) (°C) (°C) (°C)
(s) (s) (s) (s) (s) (s)
A1I 25 50 54 65 50 400 30 210 20 130
A2I 25 54 70 120 600 60 300 40 180
NOTE For integrating LTHD the static response temperature test and the max ambient temperature test (to test the
maximum application temperature) are performed with the maximum length of sensing element as specified by the
manufacturer.
4.2.2 Heat response for local protection application
LTHD for local protection shall comply at least to one heat response class of Table 3 or Table 4.
Table 3 — Heat response local protection for non-integrating LTHD
Heat Typical Maximum Minimum static Maximum static
response application application response response
class temperature temperature temperature temperature
(°C) (°C) (°C) (°C)
65 69
BN 40 85
CN 55 84 100
DN 70 99 115
EN 85 114 130
FN 100 129 145
GN 115 144 160
NOTE For non-integrating LTHD the static response temperature test is performed with
a part of 10 m of sensing element and the max ambient temperature test (to test the
maximum application temperature) is performed with the maximum length of sensing
element as specified by the manufacturer.

Table 4 — Heat response local protection for integrating LTHD
Heat response Typical Maximum Minimum static Maximum static
class application application response response
temperature temperature temperature temperature
(°C) (°C) (°C) (°C)
BI 40 65 69 85
CI 55 80 84 100
DI 70 95 99 115
EI 85 110 114 130
FI 100 125 129 145
GI 115 140 144 160
NOTE For integrating LTHD the static response temperature test and the max ambient temperature
test (to test the maximum application temperature) are performed with the maximum length of sensing
element as specified by the manufacturer.

4.3 Environmental groups
The sensing element may be classified as one of two environmental groups (II or III).
The sensor control unit may be classified as one of three environmental groups (I, II or III).
4.4 General detector requirements
4.4.1 Individual alarm indication
Each sensor control unit shall be provided with an integral latched red visual indicator, by which the individual
sensor control unit, which released an alarm, 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 an ambient light intensity up to 500 lux.
If more than one sensing element is connected to the sensor control unit, there shall be separate alarm
indication for each sensing element.
4.4.2 Interface
4.4.2.1 Alarm and fault interface
The sensor control unit shall signal the alarm and fault status to the control and indicating equipment.
If more than one sensing element is connected to the sensor control unit, there shall be separate alarm and
fault signals for each sensing element.
4.4.2.2 Fault
A fault shall be signalled in the following conditions:
1. Sensing element faults (see 5.26)
2. Low voltage (see 5.27)
3. Processor failure, where applicable
4.4.3 Connection of ancillary devices
Where the LTHD 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 LTHD.
4.4.4 Marking
4.4.4.1 General
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 and shall be accessible during maintenance.
The markings shall not be placed on easily removable parts like screws.
4.4.4.2 Marking of sensor control unit
The sensor control unit shall be clearly marked with the following information:
a) the number of this standard (i.e. EN 54-22:200x);
b) the class(es) of the LTHD (e.g. A1I, A1N, BI, BN, etc.). If the detector has provision for on-site adjustment
of the classes (see 4.2), then the marking of the class may be replaced by the symbol P (programmable);
c) Environment classification (Group I, II or III);
d) the name or trademark of the manufacturer or supplier;
e) the model designation (type or number);
f) the wiring terminal designations;
g) 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 sensor control unit.
4.4.4.3 Marking of sensing element
Each sensing element shall be marked with the following information:
a) name or trademark of the manufacturer or supplier;
b) model designation (type or number);
c) environment classification (Group II or III);
d) 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 sensing element, if applicable.
e) marking of sensor location and orientation (if applicable, e.g. for multipoint systems);
NOTE If it is not possible to mark directly on the sensing element then the use of at least one label securely fixed to
the sensing element is permitted.
4.4.4.4 Marking of functional units
Each functional unit shall be marked with the following information:
a) the number of this standard (i.e. EN 54-22:200x);
b) name or trademark of the manufacturer or supplier;
c) model designation (type or number);
d) environment classification (Group I, II or III);
e) the wiring terminal designations;
f) 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 functional unit.
4.4.5 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).
4.4.6 On-site adjustment of response behaviour
The effective response behaviour of a LTHD is dependent upon both the sensitivity settings of the sensor
control unit and the heat sensing element. Many types of LTHD therefore have facilities to adjust the
sensitivity of the LTHD 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 may be carried out at the sensor control unit or at the control and indicating equipment.
4.4.7 Power supplies
The power for the LTHD shall be supplied by a power supply complying with EN 54-4.
NOTE This power supply may be the power supply for the control and indicating equipment.
4.4.8 Data
LTHD shall either be supplied with sufficient technical, installation and maintenance data to enable their
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 with each LTHD.
To understand correct operation of the detectors, additional data shall be available that describe the
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 sensor control unit
and/or control and indicating equipment, etc.
Installation and maintenance data shall include reference to an in situ test method to ensure that detectors
operate correctly when installed.
For integrating LTHD the manufacturer shall declare the relation between the maximum application
temperature and the corresponding sensing element length for each class to which the manufacturer claims
compliance.
NOTE Additional information could be required by organisations certifying that detectors produced by a manufacturer
conform to the requirements of this standard.
4.4.9 Additional requirements for software controlled detectors
4.4.9.1 General
For LTHD, which rely on software control in order to fulfil the requirements of this standard, the requirements
of 4.4.9.2, 4.4.9.3 and 4.4.9.4 shall be met.
4.4.9.2 Software documentation
4.4.9.2.1 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.
4.4.9.2.2 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).
4.4.9.3 Software design
In order to ensure the reliability of the LTHD, 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.
4.4.9.4 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
LTHD.
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.
5 Tests
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 and 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 substantially 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 60068-1:1998).
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 behaviour
5.1.5.1 General
The purpose of this procedure is to establish any deviation in system response behaviour following the
environmental tests.
The specimen shall be connected to a suitable supply and monitoring equipment in accordance with 5.1.2
The response behaviour of the LTHD shall be tested using the test tunnel described in Annex F and Annex G
(similar to Annex A and B of EN 54-5).
The orientation of the sensing element in the test 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 4.2 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 may be used to
establish the effective start time of the temperature increase.
NOTE 2 Care should be taken 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 behaviour of linear heat detectors, the length of sensing element, L that is
to 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 test house.
NOTE The worst case should be determined taking into account the effect on the temperature measurement of noise
and losses in the sensing element.
A section of (10 ± 0,1) m (L ) of sensing element shall be wrapped around a test frame as described in
test
Annex C and Annex D and heated in the heat tunnel. This section shall be kept the same for all relevant tests
to allow the comparison of the response behaviour before, during and after the environmental tests.
The remaining section of the sensing element (L – L ) not exposed to the induced test temperature shall
1 test
remain at ambient temperature (23 ± 5) °C during the measurement unless otherwise stated in the individual
tests.
NOTE 1 To facilitate the test procedure, it may be necessary to introduce easily detachable connections between
different sections of the sensing element. The losses introduced by these connections should be taken into account when
determining L .
NOTE 2 Manufacturers may specify a minimum length of sensing element that needs to be connected before and after
the section of the sensing element being heated (L ).
test
5.1.5.3 Multipoint heat detectors
For measurement of the response behaviour of multipoint heat detectors, the length of sensing element, L
that is to 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 test house.
When testing the response behaviour of multipoint detectors, one or more single sensors of the multipoint
detector shall be placed in the centre of the tunnel measuring section (see annex E). All other sensors shall be
outside the test tunnel and shall remain at ambient temperature (23 ± 5) °C during the measurement unless
otherwise stated in the individual tests.
NOTE Manufacturers may specify a minimum length of sensing element that needs to be connected before and after
the section of the sensing element being heated.
5.1.6 Provision for tests
Three specimens of sensor control unit, three specimens of sensing element and, if applicable, three specimens
of each functional unit are required to conduct the tests as indicated in the test schedule, see 5.1.7. The required
length of sensing element shall be agreed between the manufacturer and the test house.
The specimens submitted shall be deemed representative of the manufacturer's normal production with regard
to their construction and calibration.
NOTE This implies that the mean response threshold value of the three specimens as found in the reproducibility test
should also represent the production mean. The limits specified in the reproducibility test should also be applicable to the
manufacturer's production.
5.1.7 Test schedule
The specimens shall be tested according to the following test schedule (see Table 5).
Table 5 — Test schedule
Test ClauseSpecimen Specimen Specimen
1) 1) 1)
No(s) No(s) No(s)
(sensor (sensing (functional
control units) elements) units)
Repeatability 5.2 One specimen, One One
chosen specimen, specimen (of
arbitrarily chosen each type),
arbitrarily chosen
arbitrarily
3) 2) 2)
Reproducibility 5.3 1 to 3 1 to 3 1 to 3
Variation in supply voltage 5.4 1 1 1
Fire sensitivity for room protection application 5.5 1 1 1
Static response temperature test 5.6 1 2 2
Dry heat (operational) test sensor control unit 5.7 1 2 2
Maximum ambient temperature test (sensing element) 5.8 2 3 3
Dry heat (endurance) sensing elements 5.9 2 3 3
Cold (operational) sensing elements 5.10 2 3 3
Cold (operational) for sensor control unit 5.11 2 3 3
Damp heat, steady state (endurance) 5.12 3 2 2
Damp heat, cyclic (operational) for sensing element 5.13 2 3 3
Damp heat, cyclic (operational) for sensor control unit 5.14 2 3 3
Damp heat, cyclic (endurance) 5.15 2 3 3
Sulphur dioxide (SO) corrosion (endurance) for 5.16 2 3 3
sensing element
Sulphur dioxide (SO ) corrosion (endurance) for sensor 5.17 3 3 3
control unit
Shock (operational) for sensor control unit 5.18 2 2 2
Impact (operational) for sensor control unit 5.19 2 2 2
Impact (operational) for sensing element 5.20 2 2 2
Vibration, sinusoidal, (operational) for sensor control 5.21 2 2 2
unit
Vibration, sinusoidal, (operational) for sensing element 5.22 2
...