EN 50270:2006

SLOVENSKI STANDARD
01-november-2007
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Electromagnetic compatibility - Electrical apparatus for the detection and measurement
of combustible gases, toxic gases or oxygen
Elektromagnetische Verträglichkeit - Elektrische Geräte für die Detektion und Messung
von brennbaren Gasen, toxischen Gasen oder Sauerstoff
Compatibilité électromagnétique - Appareils de détection et de mesure de gaz
combustible, de gaz toxique et d'oxygène
Ta slovenski standard je istoveten z: EN 50270:2006
ICS:
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50270
NORME EUROPÉENNE
November 2006
EUROPÄISCHE NORM
ICS 13.320; 19.080; 33.100 Supersedes EN 50270:1999

English version
Electromagnetic compatibility -
Electrical apparatus for the detection and measurement
of combustible gases, toxic gases or oxygen

Compatibilité électromagnétique -  Elektromagnetische Verträglichkeit -
Appareils de détection et de mesure Elektrische Geräte für die Detektion
de gaz combustible, de gaz toxique und Messung von brennbaren Gasen,
et d'oxygène toxischen Gasen oder Sauerstoff

This European Standard was approved by CENELEC on 2006-06-01. 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, 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

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50270:2006 E
Foreword
This European Standard was prepared by SC 31-9, Electrical apparatus for the detection and
measurement of combustible gases to be used in industrial and commercial potentially explosive
atmospheres, of Technical Committee CENELEC TC 31, Electrical apparatus for explosive atmospheres.

The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50270 on
2006-06-01.
This European Standard supersedes EN 50270:1999.

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) 2007-06-01

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2009-06-01
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and covers essential requirements of
EC Directive 89/336/EEC. See Annex ZZ.
_______________
- 3 - EN 50270:2006
Contents
Page
1 Scope.4
2 Normative references.4
3 Definitions.6
4 Immunity tests.7
4.1 Test conditions.7
4.2 Performance criteria.8
4.3 Requirements.8
5 Emission tests .8
Annex ZZ (informative) Coverage of Essential Requirements of EC Directives .14
Figure 1- Examples of ports .7
Table 1 - Immunity - Enclosure ports.9
Table 2 - Immunity - Signal ports.10
Table 3 - Immunity - Input and output DC power ports.11
Table 4 - Immunity - Input and output AC power ports.12
Table 5 - Performance requirements.13

1 Scope
This European Standard specifies requirements for the electromagnetic compatibility (EMC) for electrical
1)
apparatus for the detection and measurement of combustible gases, toxic gases or oxygen. This
standard applies to apparatus intended for use in residential, commercial and light-industrial environments
as well as to apparatus intended for use in industrial environments. The apparatus may be AC-, DC- or
battery powered.
This European Standard is also applicable to apparatus which is intended for use in hazardous areas
which may contain explosive or potentially explosive atmospheres. It covers only normal operation and
does not cover safety requirements related to EMC phenomena.

This standard specifies requirements for immunity tests in relation to continuous and transient, conducted
and radiated disturbances including electrostatic discharges and also for emission tests. The test
requirements are specified for each port considered.

These requirements have been selected to ensure an adequate level of compatibility for apparatus at the
appropriate locations. The levels do not, however, cover extreme cases, which may occur at any location,
but with an extremely low probability of occurrence.

NOTE  In special cases, situations will arise where the level of disturbances may exceed the levels specified in this standard, e.g.
where an apparatus is installed in proximity to industrial, scientific or medical (ISM) equipment as specified in EN 55011 or where a
hand-held transmitter is used in close proximity to an apparatus. In these instances special mitigation measures may have to be
employed.
Apparatus falling within the scope of this European Standard is classified as follows by the following types.

– Type 1: apparatus intended for use in residential, commercial and light-industrial environments, as
described in EN 61000-6-1 and EN 61000-6-3.

– Type 2: apparatus intended for use in industrial environments, as described in EN 61000-6-2 and
EN 61000-6-4.
This European Standard does not apply to any of the following:
– apparatus intended for the detection of dusts or mists in air;
– scientific or laboratory based apparatus used only for analysis or measurement;
– apparatus used exclusively for process measurement purposes;
– apparatus for medical purposes;
– apparatus intended for the direct measurement of automotive exhaust gases.

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 45544 series Workplace atmospheres - Electrical apparatus used for direct detection
and direct concentration measurement of toxic gases and vapours
EN 50020 Electrical apparatus for potentially explosive atmospheres
Intrinsic safety ‘i’
EN 50104 Electrical apparatus for the detection and measurement of oxygen -
Performance requirements and test methods
EN 50194 Electrical apparatus for the detection of combustible gases in domestic
premises - Test methods and performance requirements
EN 50241 series Specification for open path apparatus for the detection of combustible or
toxic gases and vapours
1)
The word ‘toxic’ is used in accordance with its dictionary definition and includes ‘harmful’, toxic’ and ‘very toxic’ meanings.

- 5 - EN 50270:2006
EN 50291 Electrical apparatus for the detection of carbon monoxide in domestic
premises: Test methods and performance requirements
EN 50379 Series Specification for portable electrical apparatus designed to measure
combustion flue gas parameters of heating appliances
EN 55011 Industrial, scientific and medical (ISM) radio-frequency equipment -
Radiodisturbance characteristics - Limits and methods of measurement
(CISPR 11, mod.)
EN 55022 Information technology equipment - Radio disturbance characteristics -
Limits and methods of measurement (CISPR 22, mod.)
EN 55024:1998 Information technology equipment - Immunity characteristics - Limits and
methods of measurement (CISPR 24:1997, mod.)
EN 61000-4-2:1995 Electromagnetic compatibility (EMC) - Part 4-2: Testing and measuring
techniques - Electrostatic discharge immunity test (IEC 61000-4-2:1995)
EN 61000-4-3:2006 Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement
techniques - Radiated, radio-frequency, electromagnetic field immunity test
(IEC 61000-4-3:2006)
EN 61000-4-4:2004 Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst immunity test
(IEC 61000-4-4:2004)
EN 61000-4-5:2006 Electromagnetic Compatibility (EMC) - Part 4-5: Testing and measurement
techniques - Surge immunity test (IEC 61000-4-5:2005)
EN 61000-4-6:1996 Electromagnetic compatibility (EMC) - Part 4-6: Testing and measuring
techniques - Immunity to conducted disturbances, induced by radio
frequency fields (IEC 61000-4-6:1996)
EN 61000-4-8:1993 Electromagnetic compatibility (EMC) - Part 4-8: Testing and measuring
techniques -: Power-frequency magnetic field immunity test
(IEC 61000-4-8:1993)
EN 61000-4-11:2004 Electromagnetic compatibility (EMC) - Part 4-11: Testing and measuring
techniques - Voltage dips, short interruptions and voltage variations
immunity tests (IEC 61000-4-11:2004)
EN 61000-6-1:2001 Electromagnetic compatibility (EMC) - Part 6-1: Generic standards -
Immunity for residential, commercial and light-industrial environments
(IEC 61000-6-1:1997, mod.)
EN 61000-6-2:2005 Electromagnetic compatibility (EMC) - Part 6-2: Generic standards -
Immunity for industrial environments (IEC 61000-6-2:2005)
EN 61000-6-3:2001 Electromagnetic compatibility (EMC) - Part 6-3: Generic standards -
Emission standard for residential, commercial and light-industrial
environments (CISPR/IEC 61000-6-3:1996, mod.)
EN 61000-6-4:2001 Electromagnetic compatibility (EMC) - Part 6-4: Generic standards -
Emission standard for industrial environments (IEC 61000-6-4:1997, mod.)
EN 61779 Series Electrical apparatus for the detection and measurement of flammable
gases (IEC 61779 series)
IEC 60050 -161 International Electrotechnical Vocabulary
Chapter 161: Electromagnetic compatibility

3 Definitions
Definitions related to EMC and to relevant phenomena may be found in the EEC Directives (89/336/EEC
and 2004/108/EC), in Chapter 161 of IEC 60050 and in CISPR Publications. The definitions stated in the
EEC Directives take precedence.

For the purposes of this standard the following definitions apply.

3.1
port
particular interface of the specified apparatus with the external electromagnetic environment (see
Figure 1)
3.2
enclosure port
physical boundary of the apparatus through which electromagnetic fields may radiate or impinge on

3.3
signal port
port at which a conductor or cable intended to carry signals is connected to the apparatus

NOTE  Eamples are analog inputs, outputs and control lines; data busses; communication networks etc.

3.4
power port
port at which a conductor or cable carrying the primary electrical power needed for the operation
(functioning) of an apparatus or associated apparatus is connected to the apparatus

3.5
intrinsically safe circuit
circuit in which any spark or any thermal effect produced in the conditions as specified in EN 50020, which
include normal operation and specified fault conditions, is not capable of causing ignition of a given
explosive gas atmosphere
3.6
intrinsically safe port
port connected to an intrinsically safe circuit

3.7
sensor
assembly in which the sensing element is housed and which may contain associated circuit components

3.8
remote sensor
sensor which is not integral with the main body of the apparatus

3.9
potentially explosive atmosphere
an atmosphere which could become explosive

3.10
safety barrier
a device for obtaining intrinsic safety of electrical apparatus for potentially explosive atmospheres (see 8.1
of EN 50020)
- 7 - EN 50270:2006
Figure 1 - Examples of ports
4 Immunity tests
4.1 Test conditions
4.1.1 The description of the tests, the test generator, the test methods, and the test set-up are given in
the basic standards which are referenced in Tables 1 to 4.

4.1.2 The tests shall be made in the most susceptible operating mode in the frequency bands being
investigated consistent with normal applications. The configurations of the test sample shall be varied to
achieve maximum susceptibility.

For portable battery powered apparatus which may also be operated when connected to an external
power supply both operational modes (battery powered as well as externally supplied) shall be tested.

4.1.3 In cases where a manufacturers specification requires external protection devices or measures
which are clearly specified in the users manual, the test requirements of this standard shall be applied with
the external protection devices or measures in use.

4.1.4 The configuration and mode of operation during the tests shall be precisely noted in the test report.
If the apparatus has different sensor types (e.g. electrochemical sensors or catalytic sensors) the
apparatus shall be tested with each type of sensor. If the apparatus has more than one measuring range
for a particular sensor the most sensitive specified by the manufacturer shall be tested. If the apparatus is
designed for the detection of a variety of gases where the target gas can be changed by changing the
sensor of a given type only (e.g. electrochemical sensors) a representative sensor shall be tested.

4.1.5 The tests shall be applied to the relevant ports of the apparatus according to Tables 1 to 4. The
tests shall only be carried out where the relevant ports exist.

If the apparatus has a large number of similar ports or ports with similar connections, then a sufficient
number shall be selected to simulate actual operating conditions and to ensure that all the different types
of termination are covered.
Connections between e.g. remote sensors or hand held terminals with the respective apparatus shall be
considered as I/O lines respectively.

4.1.6 If a system consists of a central unit and additional separate equipment (e.g. remote sensors or
printer) the control unit and the separate equipment may be tested separately if possible.

4.1.7 The tests shall be carried out under the normal operating conditions for temperature, humidity and
pressure of the appropriate product standards and at the rated supply voltage, unless otherwise indicated
in Tables 1 to 4.
4.1.8 The tests shall be performed with the apparatus showing a reading at the standard test gas
concentrations. The alarm set points shall be set at the standard test gas concentrations minus the values
given in Table 5 for the performance requirements, so that the alarm messages are given, if applicable.

For alarm only apparatus the tests shal
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