EN 50543:2011

SLOVENSKI STANDARD
01-april-2011
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Electronic portable and transportable apparatus designed to detect and measure carbon
dioxide and/or carbon monoxide in indoor ambient air - Requirements and test methods
Tragbare und transportable elektrische Geräte für die Detektion und Messung von
Kohlendioxid und/oder Kohlenmonoxid in Innenraumluft -Anforderungen und
Prüfverfahren
Matériels électroniques portables et transportables de détection et de mesure du dioxyde
de carbone et/ou du monoxyde de carbone dans l'air ambiant intérieur des locaux -
Exigences et méthodes d’essai
Ta slovenski standard je istoveten z: EN 50543:2011
ICS:
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50543
NORME EUROPÉENNE
February 2011
EUROPÄISCHE NORM
ICS 13.320
English version
Electronic portable and transportable apparatus designed to detect and
measure carbon dioxide and/or carbon monoxide in indoor ambient air -
Requirements and test methods
Matériels électroniques portables et Tragbare und transportable elektrische
transportables de détection et de mesure Geräte für die Detektion und Messung von
du dioxyde de carbone et/ou du Kohlendioxid und/oder Kohlenmonoxid in
monoxyde de carbone dans l'air ambiant Innenraumluft - Anforderungen und
intérieur des locaux - Prüfverfahren
Exigences et méthodes d’essai
This European Standard was approved by CENELEC on 2011-02-01. 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

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50543:2011 E
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 216, Gas
detectors.
The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50543
on 2011-02-01.
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) 2012-02-01

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-02-01

__________
- 3 - EN 50543:2011
Contents
For e wor d . 2
1  Scope . 4
2  Normative references . 4
3  Terms and definitions . 4
4  General requirements . 6
4.1  Construction . 6
4.2  Labelling and instructions . 8
5 Testing . 8
5.1 General . 8
5.2 Conditions for tests . 9
5.3 Test methods . 10
Bibliography . 14
Tables
Table 1 – Requirements for range, resolution, accuracy and response time . 7
Table 2 – CO test gases . 9
Table 3 – CO test gases . 9

1 Scope
This European Standard specifies requirements for the construction, testing and performance of
electronic portable and transportable apparatus for the detection and measurement of carbon
dioxide (CO ) and/or carbon monoxide (CO) in indoor ambient air, which includes air entering
mechanical ventilation systems in domestic residential, commercial and industrial premises and
public buildings.
This European Standard includes indoor air quality apparatus with CO and CO measuring
capabilities.
This European Standard excludes:
• apparatus used in workplace atmospheres for the direct detection and direct concentration
measurement of toxic gases and vapours (i.e. conforming to EN 45544 series);
• electronic portable combustion gas analysers (i.e. conforming to EN 50379 series);
• apparatus for the detection of carbon monoxide in domestic premises (i.e. conforming to
EN 50291 series).
NOTE 1  Examples of applications are monitoring indoor air quality, measuring CO and/or CO concentrations in
commercial laundry and kitchen environments, assessing the safe operation of appliances installed in compartments.
NOTE 2  When this apparatus is used in industrial premises national regulations may apply.
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 60068-2-6, Environmental testing – Part 2-6: Tests – Test Fc: Vibration (sinusoidal)
(IEC 60068-2-6)
EN 60335-1:2002 + corr. Jul. 2009 + corr. May 2010, Household and similar electrical appliances –
Safety – Part 1: General requirements (IEC 60335-1:2001, mod.)
EN 60529:1991 + corr. May. 1993, Degrees of protection provided by enclosures (IP Code)
(IEC 60529:1989)
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
NOTE  The concentration of CO in ambient air is typically different from the concentration in outdoor air.
3.2
clean air
air that contains CO at outdoor air concentrations but is free of CO and other gases and vapours to
which the sensor is sensitive or which influence the performance of the sensor
3.3
battery-powered
apparatus designed to be energized from batteries alone, whether disposable or rechargeable

- 5 - EN 50543:2011
3.4
mains powered apparatus
apparatus designed to be powered by the domestic mains electrical supply with or without an
additional power source
3.5
calibration
process of determining the deviation of a measuring apparatus relative to a certified calibration gas
cylinder
3.6
adjustment
process of tuning the apparatus, in order to return the deviation found in calibration to within the
admissible error
3.7
aspirated apparatus
gas detection apparatus that obtains the gas by drawing it through a sample line to the gas sensor,
for example, by means of a hand-operated or electric pump
3.8
diffusion apparatus
apparatus in which the transfer of gas from the atmosphere to the gas sensor takes place by
random molecular movement, i.e. under conditions in which there is no aspirated flow
3.9
domestic residential premises
unit of residential accommodation including residential park homes, flats, bed-sits, maisonettes,
terraced, semi-detached and detached houses (including all such residential accommodation
situated within or forming part of commercial or industrial or agricultural premises), leisure
accommodation vehicles and recreational craft
NOTE  It is recognized that the guidance can be applied to premises other than dwellings, such as those supplying a
small number of clients on a bed and breakfast basis.
3.10
recreational craft
boat of a minimum length of 2,5 m and a maximum length of 24 m as specified in Directive
94/25/EC, which is intended for sports or leisure purposes
NOTE  For the purposes of this European Standard the word ‘boat’ should be taken to mean ‘recreational craft’.
3.11
leisure accommodation vehicles
unit of living accommodation for temporary or seasonal occupation that may meet requirements for
construction and use of road vehicles
3.12
probe
part of the measuring system that is placed in ambient air (including air entering a mechanical
ventilation system) for the purpose of sampling the gas
3.13
gas concentration
amount of CO and/or CO present expressed as parts per million or percent by volume
NOTE  Parts per million (ppm) measurements can be expressed as parts per million (volume) (ppm ).
v
3.14
test gas
synthetic air or nitrogen containing a known concentration of CO and/or CO
3.15
portable apparatus
apparatus that has been designed to be carried readily from place to place and to be used while it is
being carried
3.16
transportable apparatus
apparatus not intended to be portable but which can be readily moved from place to place
3.17
response time
t
time interval with the apparatus in a warmed-up condition, between the time when an instantaneous
variation of the parameter to be measured is produced at the apparatus inlet, and the time when the
response reaches and remains beyond 90 % of the final indication
3.18
sensor
assembly in which the sensing element is housed, and which can contain associated electronic
components
3.19
indoor air quality apparatus
apparatus used to determine the condition of the air inside buildings, often used for analysing the
efficiency of air filtration and ventilation systems
NOTE  The apparatus can be designed to measure a number of different parameters such as gaseous composition,
temperature, relative humidity and airborne contaminant levels.
3.20
electronic portable combustion gas analyser
electronic apparatus that will detect and measure the presence of combustion gases and display the
result
3.21
warm up period
time taken for the apparatus to reach the manufacturer’s specified operating performance from
switch on, or following power failure in the case of mains powered equipment
4 General requirements
4.1 Construction
4.1.1 General
All parts of the apparatus, including the sensors and probe, shall be constructed of materials that
will not be affected by vapours and gases or chemical substances typically found in the environment
in which it is intended to be used [see 4.2.2 c)].
The apparatus shall conform to IP40, in accordance with EN 60529:1991, Clauses 12 and 14.
Adjustments that might affect the performance of the apparatus shall be suitably protected against
unauthorized changes, such as through the use of passwords, tamper-evident seals or special
tools.
4.1.2 Power supplies
Apparatus which derives its power from internal batteries may give a visual warning before the
battery capacity falls to a point where either the apparatus sensitivity or the stated display accuracy
falls outside the requirements. When this point is actually reached, a clear indication shall be given
to alert the user and the display shall switch out of normal operational mode.
Apparatus provided with the means of connection to the mains supply shall conform to relevant EN
standards.
- 7 - EN 50543:2011
NOTE  This area is covered by various statutory regulations.
4.1.3 Indicators
4.1.3.1 Indicators shall be provided to show:
a) measured parameter, values and units of measurement;
b) low battery warning for battery-powered apparatus;
c) for aspirated apparatus with an integrated flow indicator, a warning when a blockage occurs
(see 5.3.14);
d) mode of operation or apparatus status (e.g. warm-up and measurement);
e) when values lie outside the indicating range.
All values shall be indicated on a display with characters not less than 8 mm high, unless adequate
provision is made for enhancing the legibility (e.g. bac
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