prEN 50291-1:2014
(Main)Gas detectors - Electrical apparatus for the detection of carbon monoxide in domestic premises - Part 1: Test methods and performance requirements
Gas detectors - Electrical apparatus for the detection of carbon monoxide in domestic premises - Part 1: Test methods and performance requirements
2016-05-10: WI deleted following the 3-Y timeframe rules.
2015-08-05: Second tolerance allocated by BT (D151/C077)
DOW=DAV + 21 months
2014-06-20: Please include comments from ANEC when preparing the VR and comments.
This revision replaces EN 50291-1:2010/prA (PR=22968 - see TC 216 report of 2012-06-06).
2013-03-14: 9-month tolerance allocated on TC request
Gaswarngeräte - Elektrische Geräte für die Detektion von Kohlenmonoxid in Wohnhäusern - Teil 1: Prüfverfahren und Anforderungen an das Betriebsverhalten
Détecteurs de gaz - Appareils électriques pour la détection de monoxyde de carbone dans les locaux à usage domestique - Partie 1: Méthodes d'essai et exigences de performances
Javljalniki plina - Električne naprave za odkrivanje ogljikovega monoksida v gospodinjstvih - 1. del: Preskusne metode in zahtevane lastnosti
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2014
1DGRPHãþD
SIST EN 50291-1:2010
-DYOMDOQLNLSOLQD(OHNWULþQHQDSUDYH]DRGNULYDQMHRJOMLNRYHJDPRQRNVLGDY
JRVSRGLQMVWYLKGHO 3UHVNXVQHPHWRGHLQ]DKWHYDQHODVWQRVWL
Gas detectors - Electrical apparatus for the detection of carbon monoxide in domestic
premises - Part 1: Test methods and performance requirements
Détecteurs de gaz - Appareils électriques pour la détection de monoxyde de carbone
dans les locaux à usage domestique - Partie 1: Méthodes d'essai et exigences de
performances
Ta slovenski standard je istoveten z: prEN 50291-1:2014
ICS:
13.120 Varnost na domu Domestic safety
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
prEN 50291-1
NORME EUROPÉENNE
February 2014
EUROPÄISCHE NORM
ICS Will supersede EN 50291-1:2010
English version
Gas detectors -
Electrical apparatus for the detection of carbon monoxide
in domestic premises -
Part 1: Test methods and performance requirements
Détecteurs de gaz - To be completed
Appareils électriques pour la détection de
monoxyde de carbone dans les locaux à
usage domestique -
Partie 1: Méthodes d'essai et exigences de
performances
This draft European Standard is submitted to CENELEC members for CENELEC enquiry.
Deadline for CENELEC: 2014-07-11.
It has been drawn up by CLC/TC 216.
If this draft becomes a European Standard, CENELEC 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 CENELEC in three official versions (English, French, German). A
version in any other language made by translation under the responsibility of a CENELEC member into its own
language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the 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.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2014 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Project: 24177 Ref. No. prEN 50291-1:2014 E
Contents Page
Foreword .5
1 Scope .5
2 Normative references .5
3 Terms and definitions .6
4 Design requirements .7
4.1 General requirements .7
4.2 Construction .8
4.3 Visual indicators .9
4.4 Alarms .9
4.5 End-of-life . 10
4.5.1 General . 10
4.5.2 Prediction of end-of-life . 10
4.5.3 Inbuilt testing of end-of-life . 10
4.6 Fault warnings . 10
4.7 Alarm silence facility (optional) . 11
4.8 Fault warning silence facility . 11
4.9 Transmittable output signal (applicable for type A apparatus only) . 11
4.10 Software-controlled apparatus . 11
4.11 Labelling . 12
4.12 Requirements for the use of batteries . 12
4.12.1 Battery low voltage warning . 12
4.12.2 Battery capacity . 13
4.12.3 Battery reversal . 13
4.12.4 Battery connections . 13
4.12.5 Battery removal feature . 13
4.13 Inter-connectable apparatus . 13
4.14 Back-up power source . 14
4.14.1 General . 14
4.14.2 Monitoring of back-up power source. 14
5 Test and performance requirements . 14
5.1 General requirements for tests . 14
5.1.1 Test samples for type testing . 14
5.1.2 Preparation of samples . 15
5.1.3 Use of mask for testing . 15
5.1.4 Test chamber . 16
5.1.5 Unpowered storage . 16
5.2 Normal conditions for tests . 16
5.2.1 General . 16
5.2.2 Test gases for alarm testing . 16
5.2.3 Test gases for specified tests . 16
5.2.4 Speed of air and test gas . 17
5.2.5 Power supply . 17
5.2.6 Temperature . 17
5.2.7 Humidity . 17
5.2.8 Pressure . 17
5.3 Test methods and performance requirements . 17
5.3.1 General . 17
5.3.2 CO gas test . 17
5.3.3 Transmittable output signal . 18
5.3.4 Alarm conditions . 18
5.3.5 Alarm during warm-up time . 18
5.3.6 Response and recovery to a high CO volume ratio . 18
5.3.7 Temperature effects . 19
5.3.8 Humidity effects . 19
5.3.9 Air velocity test . 19
5.3.10 Supply voltage variations (mains powered apparatus only) . 19
5.3.11 Electromagnetic compatibility . 20
5.3.12 Response to mixtures of carbon monoxide and other gases. 20
5.3.13 Effects of other gases . 21
5.3.14 Long term stability . 21
5.3.15 Drop test . 22
5.3.16 Alarm sound level . 22
5.3.17 Battery fault warning . 23
5.3.18 Battery capacity . 23
5.3.19 Battery reversal . 24
5.3.20 Battery connections . 24
5.3.21 Inter-connectable apparatus . 24
5.3.22 Back-up power source . 25
5.3.23 Stability in high humidity (non- condensing) test . 26
5.3.24 Stability to low humidity test . 26
6 Apparatus using radio links . 26
6.1 General . 26
6.1.1 Frequency Bands . 26
6.1.2 Transmission channels . 26
6.1.3 Conformity with EU Directive 1999/5/EC . 27
6.1.4 RF range and reproducibility tests . 27
6.1.5 Failure of Radio link . 27
6.1.6 Response Time . 27
6.1.7 Identification Codes . 27
6.1.8 Transmission of fault warning and status signals . 27
6.1.9 RF module power supply . 27
6.1.10 Immunity to attenuation . 28
6.1.11 Immunity to collision . 28
6.1.12 Immunity to interference . 29
6.1.13 Environmental requirements . 30
6.2 Radio link tests. . 30
6.2.1 Frequency bands . 30
6.2.2 Transmission channels . 30
6.2.3 Conformance with the R&TTE Directive . 30
6.2.4 RF Range and reproducibility tests . 30
6.2.5 Failure of radio link tests . 31
6.2.6 Response Time Tests . 31
6.2.7 Identification Codes Verification Tests . 31
6.2.8 Transmission of Fault Warning and Status Signal Tests . 31
6.2.9 RF Module Power Supply Tests . 32
6.2.10 Immunity to Attenuation Tests . 33
6.2.11 Immunity to Collision Tests. 34
6.2.12 Immunity to Interference Tests . 34
6.2.13 Environmental Tests . 35
7 User instructions . 36
8 Packaging . 37
Annex A (informative) Extended stability test – Sample protocol . 38
A.1 General requirements . 38
A.2 Test . 38
A.3 Performance requirement . 38
Annex B (informative) Calculation of the expected battery service life . 39
B.1 General requirements . 39
B.2 Example . 39
B.2.1 Capacity required for 1 year operation in milli Ampere hours (mAh) . 39
B.2.2 Capacity required for 4 min alarm. 39
B.2.3 Capacity required for 30 days low battery beeping . 39
B.2.4 Smoke Alarm Voltage Operating Range . 39
B.2.5 Battery Data . 40
B.2.6 Expected Service Life . 40
Annex C (normative) Visual and audible indication sequences . 41
Annex D (informative) A-deviations . 42
Annex E (normative) Test arrangement schematics . 43
Bibliography . 46
Foreword
This document (prEN 50291-1:2014) has been prepared by Technical Committee CLC/TC 216, the secretariat
of which is held by BSI.
This document is currently submitted to the CLC Enquiry.
1 Scope
This European Standard specifies general requirements for the construction, testing and performance of
electrically operated carbon monoxide gas detection apparatus, designed for continuous operation in domestic
premises. The apparatus may be mains-powered or battery-powered. Such apparatus is intended to warn of
an accumulation of CO, enabling the occupant to react before being exposed to significant risk.
Additional requirements for apparatus to be used in recreational vehicles and similar premises are specified in
EN 50291-2.
NOTE For caravan holiday homes EN 50291–1 applies.
This European Standard specifies two types of apparatus, these are;
— type A – to provide a visual and audible alarm and an executive action in the form of an transmittable
output signal that can be used to actuate directly or indirectly a ventilation or other ancillary device; and
— type B – to provide a visual and audible alarm only.
This European Standard excludes apparatus for:
— the detection of combustible gases, other than carbon monoxide itself (see EN 50194-1);
— the detection of CO in industrial installations (see EN 45544-1, EN 45544-2 and EN 45544-3) or
commercial premises; and
— CO measurement for smoke and fire detection.
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 50270:2006, Electromagnetic compatibility – Electrical apparatus for the detection and measurement of
combustible gases, toxic gases or oxygen
EN 50271:2010, Electrical apparatus for the detection and measurement of combustible gases, toxic gases or
oxygen – Requirements and tests for apparatus using software and/or digital technologies
EN 50292:2001, Electrical apparatus for the detection of carbon monoxide in domestic premises – Guide on
the selection, installation, use and maintenance
EN 60335-1:2012, Household and similar electrical appliances – Safety – Part 1: General requirements
(IEC 60335-1:2010, modified)
EN 60704-1:2010, Household and similar electrical appliances – Test code for the determination of airborne
acoustical noise – Part 1: General requirements (IEC 60407-1:1997)
EN 300 200-1, Electromagnetic compatibility and radio spectrum matters (ERM); Short range devices (SRD);
Radio equipment to be used in the 25 mhz to 1 000 mhz frequency range with power levels ranging up to 500
mw; Part 1: Technical characteristics and test methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
ambient conditions
normal atmosphere surrounding the apparatus
3.2
clean air
air that has concentrations of less than 3 ppm of carbon monoxide and does not contain interfering and
contaminating substances
3.3
domestic premises
any house or building being a place of residence or home of a household, family or person
3.4
fixed installation
apparatus which is intended to have all parts except replaceable batteries permanently installed
3.5
sensor
assembly in which the sensing element is housed and which can contain associated circuit components
3.6
sensing element
device, the output of which will change in the presence of carbon monoxide
3.7
volume ratio (V/V)
ratio of the volume of a component to the volume of the gas mixture
3.8
transmittable output signal
signal characterised by a standby and an activation state by which action may be initiated
EXAMPLE Triggering a ventilation device.
3.9
warm-up time
time interval between the time when the apparatus is switched on and the time when the apparatus is fully
operational
3.10
alarm set point
fixed setting of the apparatus that determines the volume ratio and duration of exposure at which the
apparatus will automatically initiate an alarm and, for type A apparatus an transmittable output signal
3.11
fault warning
visual and audible signal indicating a faulty or failed apparatus
3.12
mains-powered apparatus
apparatus designed to be powered by the normal domestic mains electrical supply, with or without an
alternative power source
3.13
battery-powered apparatus
apparatus designed to be powered by batteries only
3.14
continuous operation
apparatus which is continuously powered with continuous or intermittent automatic sensing
3.15
recreational vehicle
recreational vehicles considered by this European Standard include recreational craft, caravans and motor
caravans
Note to entry: Other motorised vehicles like trucks are known to have residential accommodation. They are not
recreational vehicles but are considered as similar premises in respect of this European Standard.
3.16
caravan holiday home
transportable leisure accommodation vehicle that does not meet requirements for construction and use of
road vehicles, that retains means for mobility and that is for temporary or seasonal occupation
[EN 13878:2003]
3.17
apparatus
carbon monoxide detection device, which may also be generically termed “gas detector”, comprising the
sensor, remote sensor if applicable, alarm and any other circuit components, power supply and, for type A
apparatus, a means of providing an transmittable output signal
3.18
end-of-life
point in time where the apparatus should be replaced
3.19
sealed-for-life
self-contained apparatus where the battery, sensor or any other component cannot be tampered with or
replaced
3.20
non-replaceable battery-powered apparatus
apparatus where the battery cannot be tampered with or replaced
3.21
free-field conditions
conditions where there is an absence of sound reflecting surfaces or radio frequency reflecting surfaces
4 Design requirements
4.1 General requirements
4.1.1 Unless otherwise stated, the requirements specified are applicable to both type A and type B apparatus.
4.1.2 The apparatus shall reliably detect the presence of carbon monoxide in domestic premises under the
stated application conditions, shall produce an alarm, and in the case of type A apparatus, shall be able to
initiate executive actions whenever the conditions (in terms of both level and duration) exceed pre-set alarm
set points.
4.1.3 Apparatus which includes functionality additional to carbon monoxide detection shall perform according
to the requirements of this European Standard and to the requirements of the applicable European Standard
or equivalent relevant to the additional functionality.
4.1.4 The apparatus, electrical assemblies and components shall comply with the requirements of 4.2 to 4.8
and the performance requirements of Clause 5.
For apparatus utilising radio links, the requirements of Clause 6 shall be met.
Apparatus shall be designed for continuous operation.
The apparatus shall not be class 0 as defined in 3.3.7 of EN 60335-1:2002.
4.1.5 Where the CO sensor is replaceable, the design of the apparatus shall be such that replacement of the
sensor does not affect compliance with the requirements of this European Standard.
This condition shall be verified using the information and the documentation given by the manufacturer of the
detector.
4.1.6 The apparatus shall indicate end-of-life as per 4.5.
4.1.7 The apparatus shall be provided with an installation and maintenance instruction booklet or leaflet
meeting the requirements of Clause 7.
4.1.8 All adjustment devices and tools intended for adjustment of, or access to, such adjustment devices shall
be designed so as to discourage unauthorised interference with the apparatus.
4.1.9 The manufacturer's means of calibration shall not be readily adjustable by the user.
4.1.10 Except for batteries and replaceable CO sensors, the apparatus shall not have any user replaceable or
serviceable components.
4.1.11 Visual and audible indicators shall comply with the sequences in Annex C.
4.2 Construction
The apparatus shall comply with the appropriate requirements of EN 60335-1 as listed in Table 1.
When the sensor is replaceable: Mechanical and/or electrical means shall guarantee the replacement of the
sensor without errors. In the case of electrical recognition of the incorrect connection or absence of the
sensor, the detector shall give an automatic signal of a fault and/or alarm. Moreover it shall be impossible or
recognized as an error the connection of a sensor designed for a certain type of gas to a detector designed for
a different type of gas.
Table 1 — Construction requirements
Constructional requirement EN 60335–1:2012
(Sub)clause
Protection against accessibility to live parts 8
Heating Relevant parts of 11
Leakage current and electrical strength at operating 13
temperature
Moisture resistance 15.1 and 15.3
Leakage current and electrical strength 16
Overload protection of transformers and associated 17
circuits
Abnormal operation 19
Mechanical strength 21
Construction 22
Internal wiring 23
Components 24.1, 24.2 and 24.4
Supply connection and external flexible cords 25.3
Terminals for external conductors 26
Provision for earthing 27
Screws and connections 28
Creepage distances, clearances and distances through 29
insulation
Resistance to heat and fire 30
Resistance to rusting 31
4.3 Visual indicators
4.3.1 The power supply visual indicator shall be fitted and shall be coloured green. For mains-powered
apparatus the visual indicator shall be continuously illuminated. For battery powered apparatus the visual
indicator shall flash at least once per minute.
4.3.2 The alarm visual indicator shall be fitted and shall be coloured red.
4.3.3 The fault visual indicator shall be fitted and shall be yellow.
4.3.4 The visual indicators shall be marked to show their function.
4.3.5 Where a visual indication consists of flashes at a rate greater than 5 s, the flashes shall be coincident
with the audible signal.
4.3.6 The visual indicators shall be visible when the apparatus is installed in its operating position according
to the manufacturer’s instructions.
4.4 Alarms
4.4.1 The apparatus shall have an audible alarm, see 5.3.16.
4.4.2 The alarm visual indicator and audible alarm shall operate simultaneously at the set points as listed in
Table 2.
4.4.3 Once activated, the alarm shall remain in operation until the carbon monoxide concentration has
dropped below 55 ppm unless silenced manually by the user.
Table 2 — Alarm conditions
CO concentration Without alarm With alarm before
before
30 ppm 120 min -
50 ppm 60 min 90 min
100 ppm 10 min 40 min
300 ppm - 3 min
4.5 End-of-life
4.5.1 General
The end-of-life indicator shall be activated at a point that is determined either by prediction or inbuilt testing.
4.5.2 Prediction of end-of-life
The maximum length of time the manufacturer determines, either by prediction or extended stability testing,
until the application of test gas C would fail the requirements of Table 5.
Where the apparatus utilises the battery low voltage to determine end-of-life, the manufacturer shall supply
calculations of worst-case current consumption, worst-case battery capacity, typical duty-cycle, likely
temperature excursions and sensor data to ensure that the operating lifetime of the battery does not exceed
the lifetime of any other components including the sensor.
Where the apparatus utilises the battery low voltage to determine end-of-life, the battery shall be tamperproof
and it shall not be possible to remove it without the use of a tool.
The manufacturer shall retain evidence of the methodology and any supporting calculations which have been
used to predict the end-of-life.
NOTE 1 The end-of-life prediction evidence would normally include data from accelerated and other tests for example
showing:
— adequate immunity to interference gases and potential contaminants;
— adequate immunity to leaking due to accretion of moisture under high humidity conditions
(electrochemical sensors only);
— adequate immunity to drying out due to loss of electrolyte (electrochemical sensors only);
— adequate stability subsequent to extended temperature cycling tests; and
— stability in long term tests in controlled conditions and field trials.
NOTE 2 The example extended stability testing in Annex A can be used to support lifetime predictions.
4.5.3 Inbuilt testing of end-of-life
The end-of-life is determined as the point in time when the application of test gas C or equivalent would fail
the requirements of Table 3.
4.6 Fault warnings
4.6.1 The apparatus shall provide an audible and visible fault warning in the event of loss of continuity or
short circuit to the sensor.
4.6.2 The audible fault warning shall be clearly identified and different from a gas alarm.
4.6.3 The visual fault warning shall be as per 4.3.3.
4.6.4 The end-of-life indication shall utilise the visual fault warning. The end-of-life audible indication shall be
clearly different from all other indications.
4.7 Alarm silence facility (optional)
4.7.1 The provision of a manually operated alarm silence button is optional.
4.7.2 The operation of the alarm silence button shall silence the audible alarm signal only.
4.7.3 The audible alarm signal shall reactivate within 15 minutes from the time the alarm silence button is
operated where the concentration of carbon monoxide surrounding the alarm remains at 55 ppm CO or
greater. Continuous operation of the alarm silence facility shall not lead to the apparatus being silenced for
more than 15 min without the audible alarm being reactivated.
4.7.4 It shall not be possible to create a silent period unless the apparatus is already in the alarm condition.
4.7.5 It shall not be possible to silence the alarm at concentrations above 300 ppm.
4.7.6 The alarm silence button may be combined with the fault warning silence button (see 4.8) and the test
button.
4.7.7 Remote silencing is permitted to only be activated in the room or corridor where the apparatus is
located.
4.8 Fault warning silence facility
4.8.1 The provision of a manually operated fault warning silence button is optional.
4.8.2 The operation of the fault warning silence button shall silence the audible fault warning only.
4.8.3 The audible fault warning shall reactivate within 24 hours from the time the fault warning silence button
is operated. Continuous operation of the fault warning silence facility shall not lead to the apparatus being
silenced for more than 24 h without the audible fault warning being reactivated.
4.8.4 It shall not be possible to create a silent period unless it is already in the fault condition.
4.8.5 The fault warning silence button can be combined with the alarm silence button and the test button.
4.8.6 If the fault warning silence facility is activated, it shall not inhibit the audible alarm signal.
4.8.7 Remote silencing is permitted to only be activated in the room or corridor where the apparatus is
located.
4.9 Transmittable output signal (applicable for type A apparatus only)
The type A apparatus shall provide a transmittable output signal at each of the alarm conditions listed in
Table 2.
Open-circuit or short-circuit failure of the transmittable output signal shall not prevent the correct operation of
the apparatus.
The transmittable output signal shall be tested per 5.3.3.
4.10 Software-controlled apparatus
The apparatus shall fulfil the requirements of EN 50271:2010.
4.11 Labelling
4.11.1 All text on the apparatus shall be in accordance with national regulations.
4.11.2 The apparatus shall carry durable label(s) carrying the following information:
a) the manufacturer's or supplier's name, trademark or other means of identification;
b) the name of apparatus, model number (if any) and the type of gas to be detected;
c) the number of this European Standard;
d) the type of apparatus, A or B;
e) the serial number or manufacturing date code of the apparatus;
f) for mains-powered apparatus the electricity supply voltage and frequency and maximum power
consumption;
g) for battery-powered apparatus the type and size of replacement batteries; and
h) the apparatus replacement date.
4.11.3 The markings b) and h) shall be clearly visible with the apparatus in a typical installed position.
4.11.4 Where the sensor is replaceable, the apparatus shall carry the next replacement date of the sensor that
shall be clearly visible with the apparatus in a typical installed position. This data shall be updated in the
apparatus at each revision or replacement of the sensor, with the new date given by the manufacturer. If the
updating procedure provides the application of a pre-printed label, this shall be supplied with the new sensor
with a warning to replace the previous label attached to the detector with the new one: Every sensor shall be
provided with a marking which allows traceability of the manufacturing and calibration information of each
single sensor (e.g. serial number, manufacturing batch/production date, expected lifetime of the apparatus,
etc.).
4.11.5 The markings shall be legible and durable. When symbols are used, they shall comply with 7.6 of
EN 60335-1:2012.
4.11.6 The apparatus shall carry a caution, on a label attached to the apparatus, giving the following or
equivalent information:
CAUTION: READ THE INSTRUCTIONS CAREFULLY
BEFORE OPERATING OR SERVICING.
4.12 Requirements for the use of batteries
4.12.1 Battery low voltage warning
Battery-powered apparatus shall give a fault visual indicator per 4.3.3 and a coincident audible fault warning
before a decrease in the performance of the battery prevents correct operation of the apparatus. This shall not
inhibit the alarm condition.
The battery low voltage warning shall be indicated by:
a) a fault visual indicator per 4.3.3, and
b) an audible indicator which sounds at least once per minute coincident with the visual indicator.
The battery low voltage warning audible indication shall be clearly different from all other indications.
In the case of an alarm due to CO, the alarm sound shall to be as specified in 4.4.2.
If the fault warning silence facility is activated to silence battery low voltage warning it shall not inhibit the
audible alarm signal.
4.12.2 Battery capacity
Batteries shall be capable of supplying the quiescent load of the apparatus together with the additional load of
routine testing, for a period of 12 months, or longer if specified by the apparatus manufacturer, before the
battery low voltage warning is given and, thereafter the battery shall have sufficient capacity to give a battery
low voltage warning for at least 30 days followed by an alarm signal as specified in 4.4 for at least 4 min.
Guidance on the calculation of the expected battery service life is given in Annex B.
4.12.3 Battery reversal
The battery reversal test shall be applied to apparatus incorporating replaceable batteries if there is any
possibility of the apparatus being subjected to reversed polarity of the supply during normal battery
replacement.
4.12.4 Battery connections
Where batteries are connected to a circuit board within the apparatus by flexible leads, strain relieving devices
shall be fitted adjacent to both battery terminal connectors and the circuit board so that any pull on the leads
shall not be transmitted to the battery terminals or circuit board.
4.12.5 Battery removal feature
The removal of any user-replaceable battery used to power or provide back-up power, for the apparatus shall
result in a visual warning that the battery has been removed. The visual warning shall not depend upon a
power source.
Conformity shall be achieved by, but is not restricted to, one of the following examples.
a) a warning flag that will be exposed with the battery removed and the cover closed;
b) a hinged cover or battery compartment that cannot be closed when the battery is removed;
c) a unit that cannot be replaced upon its mounting base/bracket with the battery removed.
4.13 Inter-connectable apparatus
4.13.1 The requirements of this subclause apply if connecting a number of apparatus to give a general alarm
signal is provided the following shall apply.
4.13.2 The audible alarm signal shall be emitted by all of the interconnecting apparatus when the alarm
condition is activated by any one or more of them. If the apparatus are provided with an alarm silence facility,
initiation of the alarm silence period of one of the apparatus shall not prevent the audible alarm signal being
emitted by that apparatus when the alarm condition is activated by any of the other alarms. The alarm visual
indicator, see 4.3.2 shall only be activated on the apparatus that has detected the alarm condition.
4.13.3 The interconnection of the maximum number of apparatus allowed by the manufacturer shall not have a
significant effect on the sensitivity of the apparatus nor their ability to meet the battery capacity, (see 5.3.18) or
sound output requirements (see 5.3.16).
4.13.4 Open or short-circuits of the interconnecting leads either shall not prevent the apparatus from
functioning individually or shall result in an alarm condition or fault warning. This requirement does not apply
to mains, or mains/battery supplied apparatus, for which the supply and interconnect wiring should be installed
in accordance with the appropriate national regulations.
4.13.5 The apparatus shall be tested in accordance with 5.3.21.
4.14 Back-up power source
4.14.1 General
For apparatus intended for connection to an external power supply, for which an integral backup/standby
power facility is provided, the following requirements shall apply:
a) primary cell battery back-up: the back-up power supply shall be capable of meeting the requirements of
4.12.1;
b) rechargeable back-up power sources: the back-up
...
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