SIST EN 50270:2015

SLOVENSKI STANDARD
SIST EN 50270:2015
01-april-2015
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SIST EN 50270:2007
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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 50270:2015
ICS:
13.230 Varstvo pred eksplozijo Explosion protection
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
SIST EN 50270:2015 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50270:2015

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SIST EN 50270:2015

EUROPEAN STANDARD EN 50270

NORME EUROPÉENNE

EUROPÄISCHE NORM
January 2015
ICS 13.320 Supersedes EN 50270:2006
English Version
Electromagnetic compatibility - Electrical apparatus for the
detection and measurement of combustible gases, toxic gases
or oxygen
Compatibilité électromagnétique - Appareils de détection et Elektromagnetische Verträglichkeit - Elektrische Geräte für
de mesure de gaz combustible, de gaz toxique et die Detektion und Messung von brennbaren Gasen,
d'oxygène toxischen Gasen oder Sauerstoff
This European Standard was approved by CENELEC on 2014-10-20. 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 CEN-CENELEC
Management Centre 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 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.



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
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 50270:2015 E

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EN 50270:2015 - 2 -
Contents
1 Scope .4
2 Normative references .5
3 Terms and Definitions .6
4 EMC test plan .8
4.1 General .8
4.2 Configuration of the apparatus (EUT) during testing .8
4.2.1 General .8
4.2.2 Composition of EUT.8
4.2.3 Configuration of EUT, operation modes .8
4.2.4 I/O ports .9
4.2.5 Auxiliary equipment .9
4.2.6 Cabling and earthing (grounding) .9
4.3 Operation conditions of EUT during testing .9
4.3.1 Test gases, alarm settings .9
4.3.2 Environmental conditions .10
4.3.3 EUT software during test .10
4.4 Test description .10
5 Immunity tests .10
5.1 Performance criteria .10
5.2 Requirements .11
6 Emission tests.11
7 Test report .12
8 Modifications .12

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Foreword

This document (EN 50270:2015) has been prepared by CLC/SC 31-9 "Electrical apparatus for the
detection and measurement of combustible gases to be used in industrial and commercial potentially
explosive atmospheres" of CLC/TC 31, "Electrical apparatus for explosive atmospheres" and by
CLC/TC 216 "Gas detectors".

The following dates are fixed:

(dop) 2015-10-20
• latest date by which this document has to be
implemented at national level by publication of
an identical national standard or by
endorsement
(dow) 2017-10-20
• latest date by which the national standards
conflicting with this document have to
be withdrawn

This document supersedes EN 50270:2006.

EN 50270:2015 includes the following significant technical changes with respect to EN 50270:2006:
– requirements updated according to EN 61326–1:2013;
– aspects related to functional safety considered;
– several requirements of EN 61326–3–2 implemented;
– the hierarchical level between criteria B and C re-inserted by modifying the requirements for B;
– Tables 1 to 4 updated according to above mentioned points;
– Table 5 modified according to new and updated performance standards;
– Table 5 now includes also the requirements for criterion B.

This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this
document.

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1 Scope
This European Standard specifies requirements for the electromagnetic compatibility (EMC) for electrical
apparatus for the detection and measurement of combustible gases, toxic gases or oxygen which are
subject to the performance standards for gas detection apparatus, for example EN 45544 (all parts),
EN 50104, EN 50194 (all parts), EN 50291 (all parts), EN 50379 (all parts), EN 50543, EN 50545-1, EN
60079-29-1 or EN 60079-29-4.
NOTE For the purpose of this standard the word ‘toxic’ covers ‘very toxic’, ‘toxic’, ‘harmful’, ‘corrosive‘, ‘irritating‘,
‘sensitising‘, ‘carcinogenic‘, ‘mutagenic‘ and ‘teratogenic‘.
This European 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 is a product standard which is based on the product family standard EN 61326-1. This
product standard takes precedence over the product family standard and over generic standards.
This standard applies to electrical apparatus for the detection and measurement of combustible gases,
toxic gases or oxygen that include functions specified by the manufacturer as being safety functions and
can include functions specified as not being safety functions.
All performance standards for the detection and measurement of combustible gases, toxic gases or
oxygen include the minimum requirements for functional safety specified in EN 50271. There are also gas
detectors and gas detection systems which are intended to be used with safety integrity levels SIL 1 to
SIL 3 according to EN 50402 and EN 61508 (all parts). For functional safety in industrial applications, this
standard has taken into account those aspects of EN 61326–3–2 relating to the measuring and warning
function of the apparatus defined as safety function.
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.
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.
Apparatus of type 1 where the manufacturer claims a safety integrity level should be considered as type 2
apparatus with regard to immunity requirements.
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 used for breath alcohol measurement
– apparatus intended for the direct measurement of automotive exhaust gases.

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2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

EN 45544-1, Workplace atmospheres - Electrical apparatus used for the direct detection and direct
concentration measurement of toxic gases and vapours - Part 1: General requirements and test methods
EN 50271, 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 50291-1, Electrical apparatus for the detection of carbon monoxide in domestic premises - Part 1: Test
methods and performance requirements
EN 50291-2, Electrical apparatus for the detection of carbon monoxide in domestic premises - Part 2:
Electrical apparatus for continuous operation in a fixed installation in recreational vehicles and similar
premises including recreational craft - Additional test methods and performance requirements
EN 50402, Electrical apparatus for the detection and measurement of combustible or toxic gases or
vapours or of oxygen - Requirements on the functional safety of fixed gas detection systems
EN 50545-1, Electrical apparatus for the detection and measurement of toxic and combustible gases in
car parks and tunnels - Part 1: General performance requirements and test methods for the detection and
measurement of carbon monoxide and nitrogen oxides
EN 60079-11:2012, Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i"
(IEC 60079-11:2011)
EN 61000-4-2, Electromagnetic compatibility (EMC) - Part 4-2: Testing and measuring techniques -
Electrostatic discharge immunity test (IEC 61000-4-2)
EN 61000-4-3:2006 + A1:2008 + A2:2010, Electromagnetic compatibility (EMC) - Part 4-3: Testing and
measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test
(IEC 61000-4-3:2006 A1:2007 + A2:2010)
EN 61000-4-4, Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement techniques -
Electrical fast transient/burst immunity test (IEC 61000-4-4)
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, Electromagnetic compatibility (EMC) - Part 4-6: Testing and measuring techniques -
Immunity to conducted disturbances, induced by radio frequency fields (IEC 61000-4-6)
EN 61000-4-8, Electromagnetic compatibility (EMC) - Part 4-8: Testing and measuring techniques -:
Power-frequency magnetic field immunity test (IEC 61000-4-8)
EN 61000-4-11, Electromagnetic compatibility (EMC) - Part 4-11: Testing and measuring techniques -
Voltage dips, short interruptions and voltage variations immunity tests (IEC 61000-4-11)
EN 61000-4-29, Electromagnetic compatibility (EMC) - Part 4-29: Testing and measurement techniques -
Voltage dips, short interruptions and voltage variations on d.c. input power port immunity tests
(IEC 61000-4-29)
EN 61000-6-1, Electromagnetic compatibility (EMC) - Part 6-1: Generic standards - Immunity for
residential, commercial and light-industrial environments (IEC 61000-6-1)
EN 61000-6-2, Electromagnetic compatibility (EMC) - Part 6-2: Generic standards - Immunity for industrial
environments (IEC 61000-6-2)
EN 61000-6-3, Electromagnetic compatibility (EMC) - Part 6-3: Generic standards - Emission standard for
residential, commercial and light-industrial environments (IEC 61000-6-3)
EN 61000-6-4, Electromagnetic compatibility (EMC) - Part 6-4: Generic standards - Emission standard for
industrial environments (IEC 61000-6-4)

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EN 61326-3-2:2008, Electrical equipment for measurement, control and laboratory use - EMC
requirements - Part 3-2: Immunity requirements for safety-related systems and for equipment intended to
perform safety-related functions (functional safety) - Industrial applications with specified electromagnetic
environment (IEC 61326-3-2:2008)
EN 61508-1, Functional safety of electrical/electronic/programmable electronic safety-related systems -
Part 1: General requirements (IEC 61508-1)
EN 61508-2, Functional safety of electrical/electronic/programmable electronic safety-related systems -
Part 2: Requirements for electrical/electronic/programmable electronic safety-related systems
(IEC 61508-2)
EN 61508-3, Functional safety of electrical/electronic/programmable electronic safety-related systems -
Part 3: Software requirements (IEC 61508-3)
EN 61508-4, Functional safety of electrical/electronic/programmable electronic safety-related systems -
Part 4: Definitions and abbreviations (IEC 61508-4)
IEC 60050-161, International Electrotechnical Vocabulary - Chapter 161: Electromagnetic compatibility
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply plus those found in
IEC 60050-161.

3.1
Type 1 apparatus
apparatus intended for use in residential, commercial and light-industrial environments, as described in
EN 61000-6-1 and EN 61000-6-3

3.2
Type 2 apparatus
apparatus intended for use in industrial environments, as described in EN 61000-6-2 and EN 61000-6-4

3.3
port
particular interface of the specified apparatus with the external electromagnetic environment (see
Figure 1)

3.4
enclosure port
physical boundary of the apparatus through which electromagnetic fields may radiate or impinge on

3.5
signal port
port at which a conductor or cable intended to carry signals is connected to the apparatus
Note 1 to entry: Examples are analog inputs, outputs and control lines; data busses; communication networks etc.
Note 2 to entry: Within this document, ports intended to be connected with earth potential for functional reasons (functional earth
ports) are considered as I/O ports.

3.6
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

3.7
intrinsically safe circuit
circuit in which any spark or any thermal effect produced in the conditions as specified in EN 60079-11,
which include normal operation and specified fault conditions, is not capable of causing ignition of a given
explosive atmosphere

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3.8
intrinsically safe port
port connected to an intrinsically safe circuit

3.9
sensor
assembly in which the sensing element is housed and which may contain associated circuit components

3.10
remote sensor
sensor which is not integral with the main body of the apparatus

3.11
potentially explosive atmosphere
an atmosphere which could become explosive

3.12
safety barrier
a device for obtaining intrinsic safety of electrical apparatus for potentially explosive atmospheres
[SOURCE: EN 60079-11:2012, 8.6]

3.13
standard test gas
test gas with a composition specified for each apparatus to be used for all tests unless otherwise stated

3.14
measuring function of the apparatus
generation, transmission or output of measured values or status information (e.g. fault, alarm)

3.15
safety function of the apparatus
function to be implemented by electrical apparatus for the detection and measurement of combustible
gases, toxic and oxygen that is intended to achieve or maintain a safe state, in respect of a specific
hazardous event

Note 1 to entry:The measuring and warning function of the apparatus including all associated outputs is always part of the safety
function.

3.16
DC distribution network
local d.c. electricity supply network in the infrastructure of a certain site or building intended for connection
of any type of equipment
[SOURCE: EN 61326-3-2:2008, 3.11]
Note 1 to entry: Connection to a local or remote battery is not regarded as a DC distribution network if such a link comprises only
the power supply for a single piece of equipment.

Figure 1 - Examples of ports

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3.17
combustible gas
gas or vapour which, when mixed with air in a certain proportion, will form an explosive atmosphere
Note to entry: For the purposes of this standard, the terms "combustible gas" and "flammable gas" are equivalent.
4 EMC test plan
4.1 General
An EMC test plan shall be established prior to testing. It shall contain, as a minimum, the elements given
in 4.2 to 4.4. It shall also include :
– the type of apparatus (type 1 or 2);
– the specification of the safety function(s);
– the specification of the non-safety function(s);
– the specific pass / fail criteria as defined in Tables 1 to 4 for the relevant functions appropriate to
criteria A, B or C.
It may be determined from consideration of the electrical characteristics and usage of a particular
apparatus that some tests are inappropriate and therefore unnecessary. In such cases, the decision not to
test shall be justified and recorded in the EMC test plan.
The tests shall be carried out as single tests in sequence. The sequence of testing is optional.
4.2 Configuration of the apparatus (EUT) during testing
4.2.1 General
Electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen
within the scope of this standard often consists of systems with no fixed configuration. The kind, number
and installation of different subassemblies within the apparatus may vary from system to system.
For simulating realistic EMC conditions (related both to emissions and immunity), the assembly of the
apparatus shall represent a typical installation as specified by the manufaturer. Such tests shall be carried
out as type tests under normal conditions as specified by the manufacturer in the instruction manual.
External EMC protection devices or measures specified in the instruction manual for the apparatus shall
be used or fitted for the tests.
4.2.2 Composition of EUT
All devices, racks, modules, boards, etc. significant to EMC and belonging to the EUT shall be
documented in the test plan. A rationale supporting the configuration of the EUT shall also be provided.
4.2.3 Configuration of EUT, operation modes
If an EUT has a variety of configurations, the type test shall be made with that configuration having the
maximum susceptibility. If necessary, the configuration shall be varied. Each type of module shall be
tested at least once. The rationale for this selection shall be recorded in the EMC test plan. When
designing the most susceptible configuration, possible electromagnetic interaction between modules of
the apparatus shall be taken into consideration.
NOTE The manufacturer may elect to perform all tests either on a single EUT or more than one.
The test shall be performed in measuring mode.
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.

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If the apparatus has sensors with different measuring principles (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) the sensor with the maximum
EMC-susceptibility shall be tested.
If an apparatus 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.
4.2.4 I/O ports
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.
Where there are multiple I/O ports, which are all of the same type, connecting a cable to just one of those
ports is sufficient, provided that it can be shown that the additional cables would not affect the results
significantly.
The rationale for this selection shall be justified and recorded in the EMC test plan.
4.2.5 Auxiliary equipment
When a variety of devices is provided for use with the EUT, at least one of each type of device shall be
selected to simulate actual operating conditions. Auxiliary devices can be simulated.
4.2.6 Cabling and earthing (grounding)
The cables and earth (ground) shall be connected to the EUT in accordance with the manufacturer's
specifications.
4.3 Operation conditions of EUT during testing
4.3.1 Test gases, alarm settings
For linear measuring principles, the tests shall be carried out with the apparatus showing a reading
between 10 % and 90 % of full scale.
For non-linear measuring principles, the tests shall be carried out with the apparatus showing a gas
reading that is likely to represent the worst case conditions for the tests. If the volume fraction of the
standard test gas is not defined an indication between 40 % and 60 % of full scale shall be used.
For apparatus according to EN 50545-1 the calculation of 15 min. averages shall be deactivated.
A test gas having a volume fraction of 75 ppm shall be used for apparatus according to EN 50291-1 or
EN 50291-2. A test gas with a higher volume fraction may be applied prior to the test in order to set the
apparatus into alarm state.
The alarm set points shall be set in such a manner that the alarms are active when test gas is applied. In
doing so, the alarm set points shall be set below or above the volume fraction of the test gas according to the
performance criteria listed in table 5. For alarm only apparatus or if the alarm set points cannot be set to
these values, the test gas volume fraction shall be chosen accordingly above or below the alarm set point.
For tests 1.1 to 1.4, 2.1, 3.1 and 4.1 of Tables 1 to 4, the dwell time at each frequency shall be chosen in
such a manner that it does not fall below the update time used for calculating the measured value or the
alarm, respectively. The manufacturer shall specify this update time used for calculation in the EMC test
plan.

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NOTE This is particularly valid for apparatus complying with EN 50291 or EN 50545. The requirements of these standards to
averaging times need not be considered for these tests.
The application of test gas may be simulated (e.g. by inserting an absorbing filter into the optical path of an infrared sensor). The
sensitivity of the apparatus shall not be changed.
If absorbing filters are used to simulate the application of a test gas the test plan shall include a
justification that demonstrates how this arrangement is equivalent to the operating conditions present
when the relevant test gas is used.
Where the test gas is hazardous (combustible or toxic), an alternative test gas may be applied to the
apparatus under test. Where this is done the test plan shall include a rationale that demonstrates how this
is equivalent to the operating conditions present with the hazardous test gas.
4.3.2 Environmental conditions
The tests shall be carried out within the manufacturer's specified environmental operating range (for
example, ambient temperature, humidity, atmospheric pressure), and within the rated ranges of supply
voltage and frequency unless otherwise specified in Table 1 to Table 4.
4.3.3 EUT software during test
That part of the software which is relevant to the measuring function of the apparatus shall be identical
with the production software. Other software modifications are allowed which facilitates EMC testing.
Modifications and justifications for them shall be documented in the EMC test plan.
4.4 Test description
Each test to be applied shall be specified in the EMC test plan. The description of the tests, the test
methods, the characteristics of the tests, and the test set-ups are given in the basic standards which are
referred to in Table 1 to Table 4. Additional information needed for the practical implementation of the
tests is given also in this standard. The contents of the basic standards need not be reproduced in the test
plan.
5 Immunity tests
5.1 Performance criteria
For the functions specified by the manufacturer as being safety functions (see 3.15) the following
hierarchical performance criteria shall apply.
For safety functions the following performance criteria shall be used for the tests in Table 1 to Table 4:
For functions specified by the manufacturer as not being safety functions the allowed performance shall
be that specified by the manufacturer in the instruction manual, unless specified in the Table 1 to Table 4.
Performance criterion A:
The apparatus shall continue to operate as intended both during and after the test.
For those functions specified by the manufacturer as being safety functions, when the apparatus is used
as intended no loss of function is allowed and the performance requirements given in Table 5 shall be
complied with.
Performance criterion B:
During the test
• degradation of performance is allowed but the performance requirements
...