SIST EN 50291-1:2010
(Main)Electrical apparatus for the detection of carbon monoxide in domestic premises - Part 1: Test methods and performance requirements
Electrical apparatus for the detection of carbon monoxide in domestic premises - Part 1: Test methods and performance requirements
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 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 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), - for the detection of CO in industrial installations (see EN 45544-1, EN 45544-2 and EN 45544-3) or commercial premises, - for CO measurement for smoke and fire detection.
Elektrische Geräte für die Detektion von Kohlenmonoxid in Wohnhäusern - Teil 1: Prüfverfahren und Anforderungen an das Betriebsverhalten
Diese Europäische Norm legt allgemeine Anforderungen an die Bauweise, die Prüfverfahren und das Betriebsverhalten von elektrisch betriebenen Geräten zur Detektion von Kohlenmonoxid fest, die zum kontinuierlichen Betrieb in Wohnhäusern bestimmt sind. Die Geräte dürfen netz- oder batteriebetrieben sein. Diese Geräte sind dafür vorgesehen, vor einer Ansammlung von Kohlenmonoxid zu warnen, damit ein Bewohner Maßnahmen ergreifen kann, bevor er einem deutlichen Risiko ausgesetzt wird.
Zusätzliche Anforderungen für Geräte zum Einsatz in Freizeitfahrzeugen oder ähnlichen Umgebungen sind in EN 50291-2 festgelegt.
ANMERKUNG Für Mobilheime gilt die EN 50291 1.
Diese Europäische Norm beschreibt zwei Typen von Geräten, und zwar:
– Typ A – zur optischen und akustischen Alarmierung und zur Ausführung einer Funktion in Form eines Ausgangssignales, das zum direkten oder indirekten Einschalten einer Lüftung oder zur Auslösung einer anderen Hilfsvorrichtung verwendet werden kann;
– Typ B – nur zur optischen und akustischen Alarmierung.
Diese Europäische Norm schließt Geräte aus:
– für die Detektion von brennbaren Gasen außer Kohlenmonoxid selbst (siehe EN 50194-1);
– für die Detektion von CO in industriellen Einrichtungen (siehe EN 45544-1, EN 45544-2 und EN 45544 3) oder Geschäftsräumen,
– zur CO-Messung zur Rauch- und Feuerdetektion.
Appareils électriques pour la détection de monoxyde de carbone dans les locaux à usage domestique - Partie 1: Méthodes d'essais et prescriptions de performances
La présente Norme Européenne spécifie les exigences générales concernant la construction, les essais et l’aptitude à la fonction des appareils de détection de gaz de monoxyde de carbone fonctionnant électriquement et conçus pour une exploitation continue dans les locaux à usage privé. L’appareil peut être alimenté par le réseau ou par batterie. Un tel appareil est destiné à avertir d’une accumulation de CO, permettant ainsi à l’occupant de réagir avant d’être exposé à un risque significatif.
Des exigences supplémentaires applicables aux appareils utilisables dans les véhicules de loisir et locaux assimilables sont spécifiées dans la EN 50291-2.
NOTE La EN 50291-1 s’applique aux caravanes et résidences mobiles.
Cette Norme Européenne spécifie deux types d’appareils qui sont les suivants:
• type A – fournit une alarme visuelle et sonore et une action de commande sous la forme d’un signal de sortie qui peut être utilisé pour actionner directement ou indirectement une ventilation ou un autre dispositif auxiliaire;
• type B – fournit uniquement une alarme visuelle et sonore.
Cette Norme Européenne exclut les appareils destinés à
– la détection des gaz combustibles, autres que le monoxyde de carbone lui-même (voir la EN 50194 1),
– la détection de CO dans les installations industrielles (voir la EN 45544-1, la EN 45544-2 et la EN 45544-3) ou les locaux à usage commercial,
– la mesure du CO en vue de la détection de fumées et d’incendie.
Električne naprave za odkrivanje ogljikovega monoksida v gospodinjstvih - 1. del: Preskusne metode in zahtevane lastnosti
Ta evropski standard opredeljuje splošne zahteve za gradnjo, preskušanje in delovanje električnih naprav za odkrivanje ogljikovega monoksida, ki so zasnovane za neprekinjeno delovanje v gospodinjstvih. Naprava je lahko z omrežnim ali baterijskim napajanjem. Takšna naprava je namenjena opozarjanju na kopičenje CO, s čimer stanovalcu omogoči, da reagira, preden je izpostavljen znatnemu tveganju. Dodatne zahteve za napravo, ki se bo uporabljala v vozilih za prosti čas in na podobnih lokacijah, so opredeljene v EN 50291-2. OPOMBA: Za bivalne počitniške prikolice se uporablja EN 50291-1. Ta evropski standard opredeljuje dve vrsti naprav, to so • tip A – za zagotavljanje vizualnega in slišnega alarma in izvršilno akcijo v obliki izhodnega signala, ki se lahko uporabi za neposredno ali posredno aktiviranje naprave za prezračevanje ali druge pomožne naprave, in • tip B – samo za zagotavljanje vizualnega in slišnega alarma. Ta evropski standard izključuje naprave – za odkrivanje vnetljivih plinov, razen samega ogljikovega monoksida (glej EN 50194-1), - za odkrivanje CO v industrijskih obratih (glej EN 45544-1, EN 45544-2 in EN 45544-3) ali poslovnih prostorih, - za merjenje CO za odkrivanje dima in ognja.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 50291-1:2010
01-september-2010
1DGRPHãþD
SIST EN 50291:2002
(OHNWULþQHQDSUDYH]DRGNULYDQMHRJOMLNRYHJDPRQRNVLGDYJRVSRGLQMVWYLKGHO
3UHVNXVQHPHWRGHLQ]DKWHYDQHODVWQRVWL
Electrical apparatus for the detection of carbon monoxide in domestic premises - Part 1:
Test methods and performance requirements
Elektrische Geräte für die Detektion von Kohlenmonoxid in Wohnhäusern - Teil 1:
Prüfverfahren und Anforderungen an das Betriebsverhalten
Appareils électriques pour la détection de monoxyde de carbone dans les locaux à
usage domestique - Partie 1: Méthodes d'essais et prescriptions de performances
Ta slovenski standard je istoveten z: EN 50291-1:2010
ICS:
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
SIST EN 50291-1:2010 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 50291-1:2010
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SIST EN 50291-1:2010
EUROPEAN STANDARD
EN 50291-1
NORME EUROPÉENNE
April 2010
EUROPÄISCHE NORM
ICS 13.320 Supersedes EN 50291:2001
English version
Electrical apparatus for the detection of carbon monoxide
in domestic premises -
Part 1: Test methods and performance requirements
Appareils électriques pour la détection Elektrische Geräte für die Detektion
de monoxyde de carbone dans les locaux von Kohlenmonoxid in Wohnhäusern -
à usage domestique - Teil 1: Prüfverfahren und Anforderungen
Partie 1: Méthodes d'essais an das Betriebsverhalten
et prescriptions de performances
This European Standard was approved by CENELEC on 2010-04-15. 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.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC 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 CENELEC member into its own language and notified
to the Central Secretariat 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50291-1:2010 E
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EN 50291-1:2010 – 2 –
Foreword
This European Standard, prepared by the Technical Committee CENELEC TC 216, Gas detectors, was
submitted to the formal vote and was approved by CENELEC as EN 50291-1 on 2010-04-15.
This European Standard supersedes EN 50291:2001.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement
(dop) 2011-04-15
– latest date by which the national standards conflicting
with the EN have to be withdrawn
(dow) 2013-04-15
___________
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Contents
1 Scope .4
2 Normative references .4
3 Terms and definitions .5
4 General requirements .6
4.1 General.6
4.2 Construction .7
4.3 Indicators and alarms .7
4.4 Fault signals .8
4.5 Output signal (applicable for type A apparatus only) .8
4.6 Software-controlled apparatus .8
4.7 Labelling and instructions .8
5 Test and performance requirements .10
5.1 General requirements for tests .10
5.2 Normal conditions for tests.11
5.3 Test methods and performance requirements .12
6 Self-contained battery powered apparatus .18
6.1 Battery fault warning .18
6.2 Battery capacity .18
6.3 Battery reversal .19
6.4 Battery connections .19
Annex A (informative) Extended stability test – Example protocol .20
A.1 General requirements .20
A.2 Test .20
A.3 Performance requirement .20
Annex B (informative) A-deviations .21
Bibliography .22
Figure
Figure 1 – Sound level test .17
Tables
Table 1 – Construction requirements .7
Table 2 – Alarm conditions .8
Table 3 – Alarm conditions with test gases .11
Table 4 – Composition of test gas mixture .15
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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 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 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),
– for the detection of CO in industrial installations (see EN 45544-1, EN 45544-2 and EN 45544-3) or
commercial premises,
– for 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 2001 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 2002 Household and similar electrical appliances – Safety – Part 1: General
requirements (IEC 60335-1:2001, modified)
EN 60529 1991 Degrees of protection provided by enclosures (IP Code)
(IEC 60529:1989)
EN 60704-1 1997 Household and similar electrical appliances – Test code for the
determination of airborne acoustical noise – Part 1: General
requirements (IEC 60407-1:1997)
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3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
ambient air
normal atmosphere surrounding the apparatus
3.2
clean air
air which is free of carbon monoxide, 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 may 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
output signal
signal characterised by a standby and an activation state by which action may be initiated, e.g. 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 output signal
3.11
fault signal
visual and/or 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
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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 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
CO detection apparatus
apparatus, 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 output signal
4 General requirements
4.1 General
Unless otherwise stated, the requirements specified are applicable to both type A and type B apparatus.
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.
Apparatus which includes functionality additional to carbon monoxide detection shall perform according to
the requirements of this European Standard and to the requirements of any standards relevant to the
additional functionality.
The apparatus, electrical assemblies and components shall comply with the requirements of 4.2 to 4.7
and the performance requirements of Clause 5. Apparatus shall be designed for continuous operation.
The apparatus shall not be class 0 as defined in EN 60335-1:2002, 3.3.7.
When replaceable, the sensor as defined in 3.5 shall guarantee the same constructional characteristics
and functions as the previous sensor without modifying the internal detector in such way to keep
unchanged the compliance of the detector to all the requirements of this European Standard. The above
condition shall be verified using the information and the documentation given by the manufacturer of the
detector.
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4.2 Construction
The apparatus shall comply with the appropriate requirements of EN 60335-1:2002 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 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 60335-1:2002
(Sub)clause
Protection against accessibility to live parts 8
Heating Relevant parts of 11
Leakage current and electrical strength at operating temperature 13
Moisture resistance 15.1 and 15.3
Leakage current and electrical strength 16
Overload protection of transformers and associated circuits 17
Abnormal operation 19
Construction 22
Internal wiring 23
Components 24.1,24.2, 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 insulation 29
Resistance to heat and fire 30
Resistance to rusting 31
4.3 Indicators and alarms
4.3.1 Visual indicators shall be fitted and coloured as follows:
a) power supply indicators shall be coloured green;
b) alarm indicators shall be coloured red.
Where fitted, the visual fault indication shall be yellow.
If a sensor ‘end-of-life’ indication is fitted, this shall be clearly different from all other indications.
The indicators shall be marked to show their function.
The indicators shall be visible when the apparatus is installed in its operating position according to the
manufacturer’s instructions.
4.3.2 The apparatus shall have an audible alarm, see 5.3.16.
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4.3.3 Alarm indicators and audible alarms shall operate simultaneously at the set points as listed in
Table 2.
Table 2 – Alarm conditions
CO concentration Without alarm before With alarm before
30 ppm 120 min -
50 ppm 60 min 90 min
100 ppm 10 min 40 min
300 ppm - 3 min
Once activated, the alarm shall remain in operation at carbon monoxide concentrations above 50 ppm.
4.3.4 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.
4.4 Fault signals
The apparatus shall provide a fault signal in the event of loss of continuity or short circuit to the sensor.
The fault signal shall be clearly identified and different from a gas alarm.
4.5 Output signal (applicable for type A apparatus only)
The apparatus shall provide an output signal at each of the alarm conditions listed in Table 2.
4.6 Software-controlled apparatus
In the design of software-controlled apparatus, the risks arising from faults in the programme shall be
taken into account.
The apparatus shall fulfil the requirements of EN 50271.
4.7 Labelling and instructions
4.7.1 General
All text on the apparatus, its packaging and in the instruction book shall be in accordance with national
regulations.
4.7.2 Labelling
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;
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g) for battery powered apparatus the type and size of replacement batteries;
h) indication of the maximum lifetime recommended for the apparatus.
The label shall be visible with the apparatus in a typical installed position and markings b) and h) shall be
clearly visible.
When 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 to trace the manufacturing and calibration
information of each single sensor (e.g. serial number, manufacturing batch/production date, expected
lifetime of the apparatus, etc.).
The markings shall be legible and shall comply with EN 60335-1:2002, 7.6 and 7.14.
4.7.3 Cautions
All gas detection apparatus shall carry a caution, on a label attached to the apparatus, for example:
CAUTION: READ THESE INSTRUCTIONS CAREFULLY
BEFORE OPERATING OR SERVICING.
4.7.4 Instruction booklet
The apparatus shall be provided with an instruction booklet or leaflet. The instruction book or leaflet shall
give complete, clear and accurate instructions for the installation, safe and proper operation, and regular
checking of the apparatus. It shall include at least the following information:
a) for mains powered apparatus, the correct operating voltage, frequency, fuse-rating (if any) and
method of connection to the mains supply system;
b) for battery powered apparatus the type and size of replacement batteries, normal operating life,
battery replacement instructions, and information on low battery conditions;
c) guidance on siting and mounting of the apparatus and the warning that the apparatus should be
installed by a competent person (see EN 50292);
d) actions to take if the apparatus alarms (see EN 50292);
e) an explanation of all warning (visual and audible) and other indicators, including re-setting facilities
where relevant;
f) a list of commonly occurring materials, vapours or gases, e.g. in cleaning fluids, polishes, paints,
cooking operations, etc., which may affect the reliability of the apparatus in the short or long term;
g) warning of the risk of electric shock or malfunction if the apparatus is tampered with;
h) instructions on the use of any relevant test procedure supplied with the apparatus;
i) the expected lifetime of the apparatus;
j) for type A apparatus, instructions on the use and characteristics of the output signal;
k) a note stating the working ranges of both temperature and humidity;
l) the alarm conditions;
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m) a description of the effects of carbon monoxide on the human body, stating that the apparatus may
not prevent the chronic effects of carbon monoxide exposure, and that the apparatus will not fully
safeguard individuals at special risk (see EN 50292:2001, Annex A);
n) warning that installation of the apparatus should not be used as a substitute for proper installation, use
and maintenance of fuel burning appliances including appropriate ventilation and exhaust systems.
4.7.5 Packaging
The apparatus packaging shall
– carry a warning that the apparatus should be installed by a competent person,
– carry relevant information regarding storage and transport,
– carry the following information: the expected lifetime of the sensor if it could be affected by storage
time and if different to the lifetime of the apparatus.
The package shall clearly display the following message:
This apparatus is designed to protect individuals from the acute
effects of carbon monoxide exposure. It will not fully safeguard
individuals with specific medical conditions. If in doubt consult a
medical practitioner.
5 Test and performance requirements
5.1 General requirements for tests
5.1.1 Test samples
For the purposes of type testing
– compliance with 4.2 and 5.3.15 to 5.3.18 shall be verified using samples as required. These samples
should not be used for subsequent tests unless agreed by the manufacturer,
– three samples shall be subjected to the tests specified in 5.3.2 to 5.3.13 and for battery powered
apparatus, Clause 6. All three samples shall pass the tests,
– three further samples may be used for the long term stability test 5.3.14 (at the manufacturer’s
discretion). All three samples shall pass the test.
5.1.2 Preparation of samples
The sample apparatus shall be prepared and mounted when applicable, in accordance with the
manufacturer's instructions without modification.
The entire apparatus shall be subjected to the test conditions.
5.1.3 Use of mask for testing
The use of a mask is allowed for subjecting the apparatus to test gases. The design and operation of the
mask used by the testing laboratory, in particular, the gas pressure and velocity inside the mask shall not
influence the response of the apparatus or the results obtained. The manufacturer may provide a suitable
mask with the apparatus.
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5.1.4 Test chamber
The construction of the chamber shall be such as to ensure that the apparatus is exposed to a specific
volume ratio of test gas in a reproducible manner.
5.2 Normal conditions for tests
5.2.1 General
The test conditions specified in 5.2.2 to 5.2.9 shall be used for all tests unless otherwise specified. Before
commencing any test sequence, the apparatus shall be allowed to warm-up for a minimum period of 1 h
except for 5.3.5.
5.2.2 Test gases for alarm testing
The following CO test gas volume ratios, see Table 3, shall be used for alarm testing as described in
5.3.1.
Table 3 – Alarm conditions with test gases
Test gas reference CO volume ratio Test gas volume ratio Without alarm before With alarm before
A 30 ppm 33 ppm ± 3 ppm 120 min -
B 50 ppm 55 ppm ± 5 ppm 60 min 90 min
C 100 ppm 110 ppm ± 10 ppm 10 min 40 min
D 300 ppm 330 ppm ± 30 ppm - 3 min
5.2.3 Test gases for specified tests
For the long-term stability test, 5.3.14, the mixture of CO in air shall have a volume ratio of
10 ppm ± 5 ppm.
For the high volume ratio test, 5.3.6, the mixture of CO in air shall have a volume ratio of
5 000 ppm ± 100 ppm.
5.2.4 Speed of test gas
The speed of air or test gas in the test chamber shall be between 0,1 m/s and 0,5 m/s. In the case of a
mask, the requirements of 5.1.3 apply.
5.2.5 Power supply
For mains powered apparatus, the electricity supply shall be within ± 2 % of the nominal value declared by
the manufacturer.
5.2.6 Temperature
The tests shall be performed using air and test gases of constant temperature ± 2 ºC within the range
15 ºC to 25 ºC throughout the duration of each test.
5.2.7 Humidity
The tests shall be performed using air and test gases of constant relative humidity (r.h.) ± 10 % r.h. within
the range 30 % r.h. to 70 % r.h. throughout the duration of each test.
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5.2.8 Pressure
The tests shall be performed using air and test gases at ambient pressure ± 2 kPa within the range of
86 kPa to 108 kPa throughout the duration of the test.
5.2.9 Removable parts
Optional filters, windshields, or diffusion devices supplied or recommended by the manufacturer shall be
attached or removed according to which condition gives the most unfavourable result for the test being
conducted.
5.3 Test methods and performance requirements
5.3.1 General
Prior to testing to this performance standard the mechanism of testing shall be agreed between the
manufacturer and the persons undertaking the testing.
The apparatus shall comply with all the requirements under the specified test conditions. Unless otherwise
stated, each test condition shall be separately varied while the others remain normal as defined in 5.2.
When the apparatus is switched on, a warm-up time during which the apparatus is not in an active
monitoring mode, is acceptable.
Whilst the following sequence of tests is recommended the sequence of tests is not mandatory. They shall
be carried out in clean air or the test air gas mixture as appropriate.
For all testing of alarm conditions, expose the apparatus sequentially to the following test gases as
specified in Table 3 in a step change:
– to clean air for 15 min;
– to test gas A for 120 min or until the alarm activates if less than 120 min;
– to clean air for 15 min;
– to test gas B for 90 min or until the alarm activates if less than 90 min;
– to clean air for 15 min;
– to test gas C for 40 min or until the alarm activates if less than 40 min;
– to clean air for 15 min;
– to test gas D for 3 min or until the alarm activates if less that 3 min;
– to clean air for 15 min.
The exposure to test gas C and the subsequent exposure to clean air shall only be carried out for the
alarm condition test in 5.3.4.
5.3.2 Unpowered storage
Expose the apparatus sequentially to the following conditions:
a) a temperature of (-20 ± 2) °C for 24 h;
b) ambient temperature for 24 h;
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SIST EN 50291-1:2010
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c) a temperature of (50 ± 2) °C for 24 h;
d) ambient temperature for 24 h.
Allow the apparatus to warm up for 1 h and then subject it to the tests given in 5.3.4 to 5.3.13.
5.3.3 Output signal
5.3.3.1 Test
For type A apparatus, verify, during every test, the state of the output signal according to the
manufacturer’s specification.
5.3.3.2 Performance requirement
The apparatus shall provide the output signal in accordance with the manufacturer's specification.
5.3.4 Alarm conditions
5.3.4.1 Test
Under the environmental conditions specified in 5.2.5 to 5.2.8, test the alarm conditions as described
in 5.3.1.
5.3.4.2 Performance requirement
When exposed to CO - air mixtures, the alarm shall operate according to the conditions in Table 3.
Recovery from the alarm state shall take place within 6 min when exposed to clean air.
5.3.5 Alarm during warm-up time
5.3.5.1 Test
Mount the apparatus in clean air for 24 h in an unenergized condition. Introduce the test gas D and
immedi
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