SIST EN 50676:2020
(Main)Electrical equipment used for detection and concentration measurement of refrigerant gases - Performance requirements and test methods
Electrical equipment used for detection and concentration measurement of refrigerant gases - Performance requirements and test methods
This document will define test methods and performance requirements for all electrical equipment used for the detection of the refrigerant gases as defined in EN 378 1 as well as SF6 by means of concentration measurement.
NOTE 1 For the purposes of this standard, the term “refrigerant gases” includes refrigerant gases defined in EN 378 1 as well as SF6.
This document specifies general requirements for the construction, testing and performance of electrically operated refrigerant gas detection equipment in safety applications.
The application is intended to also consider electrical equipment in refrigeration systems according to the F-Gas Regulation.
This document is applicable to apparatuses whose primary purpose is to provide an indication, alarm and/or other output function to warn of the presence of refrigerant gases or SF6 in an industrial or commercial environment and, in some cases, to initiate automatic or manual protective actions. It is applicable to apparatuses in which the sensor automatically generates an electrical signal when gas is present.
Some of these refrigerant gases could be also classified as toxic gases or vapours intended for exposure measurement or as flammable gases.
In accordance with the classification of the gas and the tasks covered in EN 60079-29-1:2016, EN 45544-2:2015 and EN 45544-3:2015 for refrigeration application, three different types of equipment are provided (see also Table A.1).
- Type I: Refrigerant gas detection equipment for A2, A2L, R717, A3, B3 refrigerants as per safety class in EN 378 1:2016 Annex E in accordance with explosion protection. The equipment shall follow the existing performances in EN 60079 29 1:2016 for ranges up to 20 % LEL and or 0 % – 100 % LEL.
- Type II: Refrigerant gas detection equipment for A1, A2L, B1, B2L refrigerant gases as per safety class in EN 378 1:2016 Annex E in accordance with OEL values. The equipment shall follow the performances in EN 45544-2:2015.
- Type III Refrigerant gas detection equipment not covered by Type I or Type II for refrigerant gases A1, A2L, B1, B2L as per safety class in EN 378 1:2016 Annex E. The equipment shall follow the performances in EN 45544-3:2015
This document does not apply to non-refrigerant applications:
- monitoring of combustible gases in the range up to 20 % or up to 100 % of the LEL level, covered by EN 60079 29 1:2016;
- workplace atmospheres, covered by the EN 45544 series.
This document is not applicable to equipment:
- used for air pollution monitoring;
- external sampling systems;
- open path gas detection;
- residential applications;
- process control;
- leakage (emission rate monitoring) detection system for SF6.
NOTE 2 SF6 equipment is typically located in large and ventilated rooms or outdoor, so that monitoring SF6 concentrations in the surrounding atmosphere does not permit a reliable detection of leakages.
Elektrische Geräte zur Detektion unud Konzentrationsmessung von Kältemittelgasen - Anforderungen an das Betriebsverhalten und Prüfverfahren
Dieses Schriftstück wird Prüfverfahren und Anforderungen an das Betriebsverhalten für alle elektrischen Geräte festlegen, die mittels Konzentrationsmessung zur Detektion von Kältemittelgasen, wie in EN 378-1 festgelegt, oder von SF6 eingesetzt werden.
ANMERKUNG 1 Für die Anwendung dieser Norm schließt der Begriff "Kältemittelgas" sowohl die in EN 378-1 definierten Kältemittelgase als auch SF6 ein.
Dieses Schriftstück legt allgemeine Anforderungen an Bauweise, Prüfung und Betriebsverhalten von elektrisch betriebenen Gasmessgeräten für Kältemittel in Sicherheitsanwendungen fest.
Die Anwendung ist vorgesehen, um ebenfalls elektrische Geräte zu behandeln, die in Kälteanlagen bezüglich der F-Gas-Verordnung eingesetzt werden.
Dieses Schriftstück ist auf Geräte anwendbar, deren primärer Zweck es ist, eine Anzeige, einen Alarm und/oder ein anderes Ausgangssignal abzugeben, um vor der Anwesenheit eines Kältemittelgases oder SF6 in industriellen oder kommerziellen Umfeldern zu warnen und in einigen Fällen automatische oder manuelle Schutzmaßnahmen auszulösen. Sie ist anwendbar auf Geräte, bei denen der Sensor automatisch ein elektrisches Signal erzeugt, wenn Gas vorhanden ist.
Einige dieser Kältemittelgase können auch als toxische Gase oder Dämpfe, vorgesehen für Expositionsmessungen, oder als brennbare Gase eingeteilt sein.
In Übereinstimmung mit der Einteilung des Gases und der Einsatzzwecke für Kälteanwendungen, die von EN 60079-29-1:2016, EN 45544 2:2015 und EN 45544-3:2015 abgedeckt werden, sind drei verschiedene Gerätetypen vorgesehen.
- Typ I: Gasmessgeräte für Kältemittelgase für Kältemittel A2, A2L, R717, A3, B3 gemäß den Sicherheitsklassen in EN 378 1:2016 Annex E in Hinblick auf den Explosionsschutz. Die Geräte müssen dem bereits geltenden Betriebsverhalten aus EN 60079 29 1:2016 für Messbereiche bis 20 % UEG und/oder 0 % – 100 % UEG entsprechen.
- Typ II: Gasmessgeräte für Kältemittelgase für Kältemittelgase A1, A2L, B1, B2L gemäß den Sicherheitsklassen in EN 378 1:2016 Annex E in Hinblick auf Arbeitsplatzgrenzwerte. Die Geräte müssen dem Betriebsverhalten aus EN 45544-2:2015 entsprechen.
- Typ III: Gasmessgeräte für Kältemittelgase für Kältemittelgase A1, A2L, B1, B2L gemäß den Sicherheitsklassen in EN 378 1:2016 Annex E, die nicht durch Typ I oder Typ II abgedeckt werden. Die Geräte müssen dem Betriebsverhalten aus EN 45544-3:2015 entsprechen.
Dieses Schriftstück ist nicht anwendbar auf Anwendungen außerhalb der Kältetechnik:
- Überwachung brennbarer Gase in den Messbereichen bis 20 % UEG oder bis 100 % UEG, die von EN 60079 29 1:2016 abgedeckt wird;
- Arbeitsplatzatmosphären, die von der Normenreihe EN 45544 abgedeckt werden.
Dieses Schriftstück ist nicht anwendbar auf Geräte:
- die zur Überwachung von Umweltluftverschmutzungen verwendet werden;
- externe Entnahmesysteme;
- Messung mit offener Messstrecke;
- häusliche Anwendungen;
- Prozesssteuerung;
- Leckagedetektionssysteme (Überwachung der Emissionsrate) für SF6.
ANMERKUNG 2 Geräte zur Messung von SF6 sind üblicherweise in großen und belüfteten Räumen oder im Freien angeordnet, so dass die Überwachung von SF6-Konzentrationen in der umgebenden Atmosphäre keine zuverlässige Leckageerkennung erlaubt.
Appareils électriques utilisés pour la détection et la mesure de la concentration de gaz frigorigènes - Exigences de performance et méthodes d'essai
Le présent document définira les méthodes d’essai et les exigences de performance pour tous les appareils électriques utilisés pour la détection des gaz frigorigènes, tels que définis dans l’EN 378 1, ainsi que du SF6au moyen d’un mesurage de la concentration.
NOTE 1 Pour les besoins de la présente norme, le terme « gaz frigorigène » inclut les gaz frigorigènes définis dans l’EN 378 1 ainsi que le SF6.
Le présent document spécifie les exigences générales relatives à la construction, aux essais et aux performances des appareils électriques utilisés pour la détection des gaz frigorigènes dans des applications de sécurité.
L’application est destinée à prendre également en considération les appareils électriques utilisés dans des systèmes de réfrigération conformément au Règlement relatif aux gaz fluorés.
Le présent document s’applique aux appareillages dont le principal objectif est de fournir une indication, une alarme et/ou une autre fonction de sortie pour avertir de la présence de gaz frigorigènes ou de SF6 dans un environnement industriel ou commercial et, dans certains cas, pour déclencher automatiquement ou manuellement des mesures de protection. Il est applicable aux appareillages dans lesquels le capteur génère automatique un signal électrique en présence de gaz.
Certains de ces gaz frigorigènes peuvent également être classés en tant que gaz ou vapeurs toxiques pour le mesurage de l’exposition ou en tant que gaz inflammables.
Selon la classification du gaz et les tâches traitées dans l’EN 60079-29-1:2016, l’EN 45544 2:2015 et l’EN 45544-3:2015 pour une application de réfrigération, trois types différents d’appareils sont prévus (voir également Tableau A.1).
- Type I: Appareils de détection des gaz frigorigènes A2, A2L, R717, A3, B3 selon la classe de sécurité de l’EN 378 1:2016, Annexe E, pour la protection contre l’explosion. Les appareils doivent respecter les performances spécifiées dans l’EN 60079 29 1:2016 pour les plages allant jusqu’à 20 % de la LIE et/ou de 0 % à 100 % de la LIE.
- Type II: Appareils de détection des gaz frigorigènes A1, A2L, B1, B2L selon la classe de sécurité de l’EN 378 1:2016, Annexe E, pour les valeurs de LEP. Les appareils doivent respecter les performances spécifiées dans l’EN 45544-2:2015.
- Type III: Appareils de détection des gaz frigorigènes non couverts par le Type I ou le Type II pour les gaz frigorigènes A1, A2L, B1, B2L selon la classe de sécurité de l’EN 378 1:2016, Annexe E. Les appareils doivent respecter les performances spécifiées dans l’EN 45544-3:2015.
Le présent document ne s’applique pas aux applications sans gaz frigorigènes:
- surveillance des gaz combustibles dans la plage allant jusqu’à 20 % ou jusqu’à 100 % du niveau LIE, couverte par l’EN 60079 29 1:2016;
- atmosphères des lieux de travail, couvertes par la série EN 45544.
Le présent document n’est pas applicable:
- aux appareils utilisés pour surveiller la pollution atmosphérique;
- aux systèmes d’échantillonnage externes;
- à la détection des gaz à chemin ouvert;
- aux applications résidentielles;
- à la commande de processus;
- aux systèmes de détection de fuite (surveillance du taux d'émission) de SF6.
NOTE 2 Les appareils pour SF6 sont généralement installés dans de grandes salles ventilées ou à l’extérieur de sorte que la surveillance des concentrations en SF6 dans l’atmosphère environnante ne permette pas une détection fiable des fuites.
Električna oprema za zaznavanje hladilnih plinov in merjenje njihove koncentracije - Zahteve za delovanje in preskusne metode
Ta dokument določa preskusne metode in zahteve za delovanje za vso električno opremo za zaznavanje hladilnih plinov, kot je opredeljeno v standardu EN 378-1, in tudi SF6 z merjenjem koncentracije.
OPOMBA 1: Izraz »hladilni plini«, uporabljen v tem standardu, vključuje hladilne pline, ki so določeni v standardu EN 378 1, in tudi SF6.
Ta dokument določa splošne zahteve za sestavo, preskušanje in lastnosti električne opreme za zaznavanje hladilnih plinov v varnostnih načinih uporabe. Uporaba prav tako upošteva električno opremo v hladilnih sistemih v skladu z zahtevami za plin F. Ta dokument se uporablja za naprave, katerih prvotni namen je izdati opozorilo, alarm in/ali drugo izhodno funkcijo, s katero se opozori na prisotnost hladilnih plinov ali SF6 v poslovnem ali industrijskem okolju in v nekaterih primerih tudi sproži samodejne ali ročne zaščitne ukrepe. Uporablja se za aparate, v katerih senzor ob prisotnosti plina samodejno ustvari električni signal. Nekatere hladilne pline je mogoče razvrstiti kot strupene pline ali hlape, namenjene za merjenje izpostavljenosti, ali kot vnetljive pline. V skladu z razvrstitvijo plina in nalogami, ki jih za hladilno uporabo obravnavajo standardi EN 60079-29-1:2016, EN 45544-2:2015 in EN 45544-3:2015, so podani trije različni tipi opreme (glej tudi preglednico A.1).
– Tip I: Oprema za zaznavanje hladilnih plinov za hladilna sredstva A2, A2L, R717, A3, B3, kot določa varnostni razred iz dodatka E standarda EN 378-1:2016 v skladu z zaščito pred eksplozijo. Oprema mora biti skladna z obstoječimi lastnostmi iz standarda EN 60079-29-1:2016 za razpone do 20 % LEL in/ali 0–100 % LEL.
– Tip II: Oprema za zaznavanje hladilnih plinov za hladilna sredstva A1, A2L, B1, B2L, kot določa varnostni razred iz dodatka E standarda EN 378-1:2016 v skladu z vrednostmi OEL. Oprema mora biti skladna z lastnostmi iz standarda EN 45544-2:2015.
– Tip III: Oprema za zaznavanje hladilnih plinov, ki ni zajeta s tipom I ali II za hladilne pline A1, A2L, B1, B2L, kot določa varnostni razred iz dodatka E standarda EN 378-1:2016. Oprema mora biti skladna z lastnostmi iz standarda EN 45544-3:2015.
Ta dokument se ne uporablja za nehladilno uporabo:
– nadzor gorljivih plinov v razponu do 20 % ali do 100 % ravni LEL iz standarda EN 60079-29-1:2016;
– ozračja na delovnem mestu, ki so zajeta v skupini standardov EN 45544. Ta dokument se ne uporablja za opremo:
– ki se uporablja za nadzor onesnaženja zraka,
– za zunanje sisteme vzorčenja,
– za zaznavanje plinov z odprto potjo,
– pri stanovanjskih uporabah,
– za nadzor procesov,
– sistemov za odkrivanje puščanja (spremljanje stopnje emisij) za SF6.
OPOMBA 2: Oprema za SF6 je običajno nameščena v velikih in prezračevanih prostorih ali na prostem, tako da spremljanje koncentracij SF6 v okoliških ozračjih ne dovoljuje zanesljivega odkrivanja puščanja.
General Information
Buy Standard
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 50676:2020
01-februar-2020
Električna oprema za zaznavanje hladilnih plinov in merjenje njihove koncentracije
- Zahteve za delovanje in preskusne metode
Electrical equipment used for detection and concentration measurement of refrigerant
gases - Performance requirements and test methods
Elektrische Geräte zur Detektion unud Konzentrationsmessung von Kältemittelgasen -
Anforderungen an das Betriebsverhalten und Prüfverfahren
Appareils électriques utilisés pour la détection et la mesure de la concentration de gaz
frigorigènes - Exigences de performance et méthodes d'essai
Ta slovenski standard je istoveten z: EN 50676:2019
ICS:
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
SIST EN 50676:2020 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 50676:2020
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SIST EN 50676:2020
EUROPEAN STANDARD EN 50676
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2019
ICS 13.320; 27.200
English Version
Electrical equipment used for detection and concentration
measurement of refrigerant gases - Performance requirements
and test methods
Appareils électriques utilisés pour la détection et la mesure Elektrische Geräte zur Detektion unud
de la concentration de gaz frigorigènes - Exigences de Konzentrationsmessung von Kältemittelgasen -
performance et méthodes d'essai Anforderungen an das Betriebsverhalten und Prüfverfahren
This European Standard was approved by CENELEC on 2019-11-04. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50676:2019 E
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EN 50676:2019 (E)
Contents Page
European foreword . 3
Introduction . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
Figure 1 — Warm-up time in clean air (typical) . 8
4 General requirements . 8
4.1 Introduction . 8
4.2 Construction . 9
Table 1 — Measuring ranges, reference values and maximum thresholds . 9
4.3 Adjustments . 10
4.4 Gas detection transmitter for use with separate gas detection control units . 10
4.5 Separate gas detection control units for use with gas detection transmitter(s) . 10
4.6 Equipment using software and/or digital technologies . 10
4.7 Labelling and marking . 10
4.8 Instruction manual . 11
5 Test methods . 11
5.1 Introduction . 11
5.2 General requirements for tests . 11
5.3 Samples and sequence of tests . 11
5.4 Normal conditions for test . 12
5.5 Tests . 13
Table 2 — Test gas for poison gas test . 15
Annex A (normative) Gas specific performance requirements (EN 45544-1) . 17
Table A.1 — Gas specific performance requirements . 17
Annex B (normative) Performance requirements under standard test conditions. 18
Table B.1 — Performance requirements under standard test conditions . 18
Bibliography . 20
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SIST EN 50676:2020
EN 50676:2019 (E)
European foreword
This document (EN 50676:2019) has been prepared by CLC/TC 216 “Gas detectors”.
The following dates are fixed:
• latest date by which this document has (dop) 2020-11-04
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2022-11-04
standards conflicting with this document
have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
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SIST EN 50676:2020
EN 50676:2019 (E)
Introduction
This document specifies test methods and performance requirements for all electrical equipment used for
gas detection in refrigerant applications as defined in EN 378-1:2016 by means of concentration
measurement.
This document is addressed to the manufacturers of such equipment and test laboratories which validate it.
The tendency to use low-GWP refrigerant gases in the refrigeration and HVAC market (F-Gas Regulation)
has intensified the considerations of safety measures for low-GWP gases as some are flammable, toxic and
can cause lack of oxygen.
This document covers all refrigerant gases and defines performance requirements for the detection
equipment, mentioned in EN 378-3:2016 as gas detectors or sensors, used in refrigerant applications. The
level of safety is expected to be the same as in the already existing performance standards for general-
purpose equipment, i.e. EN 60079-29-1 concerning refrigerant flammable gases and EN 45544 series
concerning refrigerant toxic gases in atmospheres. Refrigerant gases not mentioned by EN 378-1:2016 are
also covered by this standard following the categorization scheme of EN 378-1:2016.
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EN 50676:2019 (E)
1 Scope
This document specifies general requirements for the construction, testing and performance of electrically
operated refrigerant fixed gas detection equipment in safety applications. This document does not specify
requirements for portable locating leak detectors for refrigerant application as already covered by
EN 14624:2012.
This document is applicable to equipment whose primary purpose is to provide an indication, alarm and/or
other output function to warn of the presence of refrigerant gases in an industrial or commercial environment
and, in some cases, to initiate automatic or manual protective actions. It is applicable to equipment in which
the sensor automatically generates an electrical signal when gas is present.
This standard does not apply to gas detection equipment:
— for non-refrigerant application;
— used for air pollution monitoring;
— sampling systems, which are not integral part of the gas detection equipment;
— open path gas detection;
— residential applications;
— process control;
— for applications in mines;
— portable locating leak detectors for refrigerant application.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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 378-1:2016, Refrigerating systems and heat pumps - Safety and environmental requirements - Part 1:
Basic requirements, definitions, classification and selection criteria
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 45544-2, Workplace atmospheres - Electrical apparatus used for the direct detection and direct
concentration measurement of toxic gases and vapours - Part 2: Performance requirements for apparatus
used for exposure measurement
EN 45544-3, Workplace atmospheres - Electrical apparatus used for the direct detection and direct
concentration measurement of toxic gases and vapours - Part 3: Performance requirements for apparatus
used for general gas detection
EN 45544-4, Workplace atmospheres - Electrical apparatus used for the direct detection and direct
concentration measurement of toxic gases and vapours - Part 4: Guide for selection, installation, use and
maintenance
EN 60079-29-1:2016, Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of
detectors for flammable gases
IEC 60335-2-40, Household and similar electrical appliances - Safety - Part 2-40: Particular requirements for
electrical heat pumps, air-conditioners and dehumidifiers
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3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 60079-29-1, EN 45544 series and
the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 Gas properties
3.1.1
refrigerant
fluid used for heat transfer in a refrigerating system, which absorbs heat at a low temperature and a low fluid
pressure and expels heat at a higher temperature and a higher pressure usually involving changes of the
state of the fluid
3.1.2
halocarbon and hydrocarbon
either:
— CFC: fully-halogenated halocarbon containing only chlorine, fluorine and carbon;
— HCFC: halocarbon containing hydrogen, chlorine, fluorine and carbon;
— HFC: halocarbon containing only hydrogen, fluorine and carbon;
— PFC: fully fluorinated halocarbon containing only fluorine and carbon;
— HC: hydrocarbon containing only hydrogen and carbon
[SOURCE: EN 378-1:2016, 3.7.14]
3.1.3
hydrocarbon
contains only hydrogen and carbon
3.1.4
global warming potential
GWP
climatic warming potential of a greenhouse gas relative to that of carbon dioxide (‘CO ’), calculated in terms
2
of the 100-year warming potential of one kilogram of a greenhouse gas relative to one kilogram of CO
2
3.1.5
poison
poison for sensors
substance which leads to temporary or permanent loss of sensor sensitivity
3.1.6
reference value
value used as the basis to specify requirements such as measuring range, resolution and alarm set point
3.1.7
measuring range
range of measured values of gas concentration over which the accuracy of the equipment lies within
specified limits
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3.1.8
group of gases
defined by the manufacturer to be measured with one piece of equipment without modification of hardware
or software which can be represented by a reference gas also defined by the manufacturer
3.1.9
reference gas
representative gas of a group of gases
Note 1 to entry: Only the reference gas is specifically tested in correspondence with the performance requirements of
this present standard.
3.1.10
correction factor
factor defined by the manufacturer to convert the measurement values of a given gas from a group in
relation to the defined reference gas
3.1.11
acute-toxicity exposure limit
ATEL
maximum recommended refrigerant concentration determined in accordance with EN 378-1 and intended to
reduce the risks of acute toxic hazards to humans in the event of a refrigerant release
[SOURCE: EN 378-1:2016, 3.7.5, modified]
3.1.12
occupational exposure limit value
OELV
limit of the time-weighted average of the concentration of a chemical agent in the air within the breathing
zone of a worker in relation to a specified reference period
Note 1 to entry: The term “limit value” is often used as a synonym for “occupational exposure limit value”, but the term
“occupational exposure limit value” is preferred because there is more than one limit value (e.g., biological limit value and
occupational exposure limit value).
Note 2 to entry: Occupational exposure limit values (OELVs) are often set for reference periods of 8 h, but can also be
set for shorter periods or concentration excursions.
3.1.13
machinery room
space that is designed to house compressors and pressure vessels
3.2 Types of equipment and components
3.2.1
gas detection transmitter
fixed gas detection equipment that provides a conditioned electronic signal or output indication to a generally
accepted industry standard (such as 4 mA to 20 mA), intended to be utilized with separate gas detection
control units or signal processing data acquisition, central monitoring and similar systems, and which
typically processes information from various locations and sources including, but not limited to gas detection
equipment
3.2.2
alarm-only equipment
equipment having an alarm but not a display or other device to indicate the measured gas concentration
Note 1 to entry: In EN 14624 and EN 378-3, this type of electrical equipment is defined as an indicating fixed gas
detector.
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3.3 Times
3.3.1
time of response
tx
time interval, when the equipment is in a warmed-up condition, between the time when an instantaneous
variation in volume ratio is produced at the equipment inlet and the time when the response reaches a stated
percentage (x) of the final indication
Note 1 to entry: This document refers lo t90 as the time of response.
3.3.2
warm-up time
time interval, with the equipment in a stated atmosphere, between the time when the equipment is switched
on and the time when the indication reaches and remains within the stated tolerances
Note 1 to entry: For an example see Figure 1.
Note 2 to entry: Warm-up time is not applicable to spot-reading equipment.
Key
1 power off in clean air
2 power on in clean air
3 apparatus zero
4 specified tolerance band on zero indication
5 warm-up time
y indication
x time
Figure 1 — Warm-up time in clean air (typical)
4 General requirements
4.1 Introduction
— Type I: Refrigerant gas detection equipment for A2, A2L, A3, B3 refrigerants and ammonia (R717) as
per safety class in EN 378-1:2016, Annex E in accordance with explosion protection. The equipment
shall follow the existing performances in EN 60079-29-1 for ranges up to 20 % LFL and or 0 % – 100 %
LFL. and performance requirements in EN 378 series
Equipment shall fulfil the general requirements of EN 60079-29-1 and the thresholds specified in EN 378
series.
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— Type II: Refrigerant gas detection equipment for A1, A2L, B1, B2L refrigerants as per safety class in
Annex E of EN 378-1:2016. Performance of the equipment shall be in accordance with general
requirements in EN 45544-1 in combination with EN 45544-2.and suitable for exposure measurements
in workplace atmospheres.
Equipment shall fulfil the general requirements of EN 45544-1 in conjunction with EN 45544-2.
— Type III: Refrigerant gas detection equipment for A1, A2L, B1, B2L refrigerants as per safety class in
Annex E of EN 378-1:2016 not covered by Type I or Type II. Performance of the equipment shall be in
accordance with general requirements in EN 45544-1 in combination with EN 45544-3 and EN 378
series.
Equipment shall fulfil the general requirements of EN 45544-1 in conjunction with EN 45544-3 and the
thresholds specified in EN 378 series.
Following extensions and deviations from these general requirements are applicable.
4.2 Construction
4.2.1 General
EN 60079-29-1 and EN 45544 series shall apply.
4.2.2 Measuring ranges and correction factor
4.2.2.1 General
The maximum measuring range for Type I and Type III equipment or the reference value for Type II
equipment for
...
SLOVENSKI STANDARD
oSIST prEN 50676:2019
01-april-2019
(OHNWULþQDRSUHPD]D]D]QDYDQMHKODGLOQLKSOLQRYDOL6)LQPHUMHQMHQMLKRYH
NRQFHQWUDFLMH=DKWHYH]DGHORYDQMHLQSUHVNXVQHPHWRGH
Electrical equipment used for detection and concentration measurement of refrigerant
gases or SF6 - Performance requirements and test methods.
Elektrische Geräte zur Detektion und Konzentrationsmessung von Kältemittelgasen oder
SF6 Anforderungen an das Betriebsverhalten und Prüfverfahren
Appareils électriques pour la détection et la mesure des hydrocarbures halogénés (gaz
réfrigérants) ou du SF6 - Exigences de performance et méthodes d'essai
Ta slovenski standard je istoveten z: prEN 50676
ICS:
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
oSIST prEN 50676:2019 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 50676:2019
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oSIST prEN 50676:2019
EUROPEAN STANDARD DRAFT
prEN 50676
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2019
ICS 13.320; 27.200
English Version
Electrical equipment used for detection and concentration
measurement of refrigerant gases or SF6 Performance
requirements and test methods.
Appareils électriques utilisés pour la détection et la mesure Elektrische Geräte zur Detektion unud
de la concentration de gaz frigorigènes - Exigences de Konzentrationsmessung von Kältemittelgasen -
performance et méthodes d'essai Anforderungen an das Betriebsverhalten und Prüfverfahren
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2019-05-10.
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, Serbia, 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.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 63213 Ref. No. prEN 50676 E
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prEN 50676:2019 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 6
3 Terms and definitions . 6
3.1 Gas properties . 6
3.2 Types of equipment and components . 9
3.3 Signals and alarms . 10
3.4 Times . 11
Figure 1 — Warm-up time in clean air (typical) . 12
3.5 Miscellaneous . 12
4 General requirements . 12
4.1 Introduction . 12
4.2 Construction . 12
Table 1 — Measuring ranges and reference values . 15
4.3 Adjustments . 16
4.4 Battery-powered equipment . 17
4.5 Gas detection transmitter for use with separate gas detection control units . 17
4.6 Separate gas detection control units for use with gas detection transmitter(s) . 17
4.7 Equipment using software and/or digital technologies . 17
4.8 Labelling and marking . 17
4.9 Instruction manual . 18
5 Test methods . 21
5.1 Introduction . 21
5.2 General requirements for tests . 21
5.3 Samples and sequence of tests . 21
5.4 Normal conditions for test . 24
5.5 Tests . 25
Annex A (normative) Gas specific performance requirements (EN 45544-1) . 31
Table A.1 — Gas specific performance requirements . 31
Annex B (Informative) Performance requirements under standard test conditions. 32
Table B.1 — Performance requirements under standard test conditions . 32
Bibliography . 39
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European foreword
This document (prEN 50676:2019) has been prepared by CLC/TC 216 “Gas detectors”.
This document is currently submitted to the Enquiry.
The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
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Introduction
PrEN 50676 will define test methods and performance requirements for all electrical equipment used for gas
detection in refrigerant applications as defined in EN 378-1 by means of concentration measurement.
PrEN 50676 is addressed to the manufacturers of such equipment and test laboratories which validate it.
The tendency to use low-GWP refrigerant gases in the refrigeration and HVAC market (F-Gas Regulation)
has intensified the considerations on safety measures for low-GWP gases as some are flammable, toxic and
can cause lack of oxygen.
This standard covers all refrigerant gases mentioned in EN 378 series and defines performance
requirements for the performance of gas detection equipment, mentioned in EN 378-3 as gas detectors,
used in refrigerant applications. The level of safety shall be the same as in the already existing performance
standards for general-purpose equipment, i.e. EN 60079-29-1 for flammable gases and EN 45544 series for
toxic gases in atmospheres. Refrigerant gases not mentioned by EN 378-1 are also covered by this standard
following the categorization scheme of EN 378-1.”
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1 Scope
This document specifies general requirements for the construction, testing and performance of electrically
operated refrigerant fixed gas detection equipment in safety applications. This document will not specify
requirements for portable locating leak detectors for refrigerant application.
This document is applicable to equipment whose primary purpose is to provide an indication, alarm and/or
other output function to warn of the presence of refrigerant gases in an industrial or commercial environment
and, in some cases, to initiate automatic or manual protective actions. It is applicable to equipment in which
the sensor automatically generates an electrical signal when gas is present.
In accordance with the classification of the gas and the tasks covered in EN 60079-29-1, EN 45544-2 and
EN 45544-3 for refrigeration application, three different types of equipment are provided (see also
Table A.1).
— Type I: Refrigerant gas detection equipment for A2, A2L, R717, A3, B3 refrigerants as per safety class
in EN 378-1:2016 Annex E in accordance with explosion protection. The equipment shall follow the
existing performances in EN 60079-29-1 for ranges up to 20 % LEL and or 0 % – 100 % LEL.”
— Type II: Refrigerant gas detection equipment for A1, A2L, B1, B2L refrigerants as per safety class in
Annex E of EN 378-1:2016 in relation to OEL values. Performance of the equipment shall be in
accordance with requirements in EN 45544-1 in combination with EN 45544-2.
— Type III: Refrigerant gas detection equipment for A1, A2L, B1, B2L refrigerants as per safety class in
Annex E of EN 378-1:2016 not covered by Type I or Type II. Performance of the equipment shall be in
accordance with requirements in EN 45544-1 in combination with EN 45544-3.
This standard does not apply to gas detection equipment:
— for non-refrigerant application;
— used for air pollution monitoring;
— external sampling systems;
— open path gas detection;
— residential applications;
— process control;
— for applications in mines susceptible to firedamp (Group I)
— portable locating leak detectors for refrigerant application
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2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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 45544-1:2015, 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 50271:2018, Electrical equipment for the detection and measurement of combustible gases, toxic gases
or oxygen - Requirements and tests for equipment using software and/or digital technologies
EN 60079-0, Explosive atmospheres - Part 0: Equipment - General requirements
EN 60079-29-1:2016, Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of
detectors for flammable gases
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 Gas properties
3.1.1
ambient air
normal atmosphere surrounding the equipment
3.1.2
clean air
air that is free of refrigerant gases and interfering or contaminating substances
3.1.3
refrigerant
fluid used for heat transfer in a refrigerating system, which absorbs heat at a low temperature and a low fluid
pressure and expels heat at a higher temperature and a higher pressure usually involving changes of the
state of the fluid
[SOURCE: EN 378-1:2016 3.7.1]
3.1.4
flammable gas
gas or vapour which, when mixed with air in a certain proportion, will form an explosive atmosphere
3.1.5
toxic gas
general term for any gas or vapour that can be harmful to human health toxic
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3.1.6
halocarbon
halocarbon:
— CFC: fully halogenated halocarbon containing only chlorine, fluorine and carbon;
— HCFC: halocarbon containing hydrogen, chlorine, fluorine and carbon;
— HFC: halocarbon containing only hydrogen, fluorine and carbon;
— PFC: fully fluorinated halocarbon containing only fluorine and carbon
— HFO: hydrofluoroolefins
[SOURCE: EN 378-1:2016 3.7.14, modified]
3.1.7
hydrocarbon
HC
hydrocarbon containing only hydrogen and carbon
[SOURCE: EN 378-1:2016 3.7.14, modified]
3.1.8
Lower flammable limit
LFL
volume fraction of flammable gas or vapour in air below, which an explosive gas atmosphere does not form,
expressed as a percentage
Note 1 to entry: This is also known as lower explosive (LEL).
3.1.9
global warming potential
GWP
climatic warming potential of a greenhouse gas relative to that of carbon dioxide (‘CO ’), calculated in terms
2
of the 100-year warming potential of one kilogram of a greenhouse gas relative to one kilogram of CO
2
3.1.10
poisons
poisons for sensors
substances which lead to temporary or permanent loss of sensor sensitivity
3.1.11
volume fraction
v/v
quotient of the volume of a specified component and the sum of the volumes of all components of a gas
mixture before mixing, all volumes referring to the pressure and the temperature of the gas mixture
Note 1 to entry: The volume fraction and volume concentration take the same value if, at the same state conditions, the
sum of the component volumes before mixing and the volume of the mixture are equal. However, because the mixing of
two or more gases at the same state conditions is usually accompanied by a slight contraction or, less frequently, a slight
expansion, this is not generally the case.
Note 2 to entry: This is also known as concentration.
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Note 3 to entry: Assuming the ideal behaviour of gases, the volume ratio coincides with the molar ratio (mol/mol). The
−6
ppm units are equivalent to the International System of Units 10 vol/vol.
3.1.12
zero gas
gas recommended by the manufacturer, which is free of refrigerant gases (or SF ) and interfering and
6
contaminating substances, the purpose of which is calibration/adjustment of the equipment zero
3.1.13
standard test gas
test gas with a composition specified for each piece of equipment and gas to be used for all tests unless
stated otherwise
3.1.14
reference value
value used as the basis to specify requirements such as measuring range, resolution and alarm set point
3.1.15
measuring range
range of measured values of gas concentration over which the accuracy of the equipment lies within
specified limits
3.1.16
lower limit of measurement
smallest measured value within the measuring range
3.1.17
upper limit of measurement
largest measured value within the measuring range
3.1.18
group of gases
group of different gases defined by the manufacturer to be measured with one piece of equipment without
modification of hardware or software which can be represented by a reference gas also defined by the
manufacturer
3.1.19
reference gas
reference gas is the representative gas of a group of gases
Note 1 to entry: Only the reference gas is specifically tested in correspondence with the performance requirements of
this present standard.
3.1.20
correction factor
factor defined by the manufacturer to convert the measurement values of a given gas from a group in
relation to the defined reference gas
3.1.21
acute-toxicity exposure limit
ATEL
maximum recommended refrigerant concentration determined in accordance with EN 378-1 and intended to
reduce the risks of acute toxic hazards to humans in the event of a refrigerant release
[SOURCE: EN 378-1:2016 3.7.5, modified]
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3.1.22
occupational exposure limit value
OELV
limit of the time-weighted average of the concentration of a chemical agent in the air within the breathing
zone of a worker in relation to a specified reference period
Note 1 to entry: The term “limit value” is often used as a synonym for “occupational exposure limit value”, but the term
“occupational exposure limit value” is preferred because there is more than one limit value (e.g. biological limit value and
occupational exposure limit value).
Note 2 to entry: Occupational exposure limit values (OELVs) are often set for reference periods of 8 h, but can also be
set for shorter periods or concentration excursions.
3.1.24
machinery room
space that is designed to house compressors and pressure vessels
3.2 Types of equipment and components
3.2.1
aspirated equipment
equipment that samples the gas by drawing it to the gas sensor, e.g. by means of a hand-operated or
electric pump
3.2.2
continuous duty equipment
equipment that is powered for long periods of time, but may have either continuous or intermittent sensing
3.2.3
diffusion equipment
equipment 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
3.2.4
fixed equipment
equipment that is intended to have all parts permanently installed
3.2.5
portable equipment
battery powered, spot-reading or continuous duty equipment that has been designed to be readily carried
from place to place and to be used while it is being carried and includes but is not limited to:
a) hand-held equipment, typically less than 1 kg, which requires use of only one hand to operate,
b) personal monitors, similar in size and mass to hand-held equipment, that are continuously operating (but
not necessarily continuously sensing) while they are attached to the user, and
c) larger equipment that can be operated by the user while it is carried either by hand, by a shoulder strap
or carrying harness and which may or may not have a hand directed probe
3.2.6
transportable equipment
equipment not intended to be portable but which can be readily moved from one place to another
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3.2.7
gas detection transmitter
fixed gas detection equipment that provide a conditioned electronic signal or output indication to a generally
accepted industry standard (such as 4 mA to 20 mA), intended to be utilized with separate gas detection
control units or signal processing data acquisition, central monitoring and similar systems, which typically
process information from various locations and sources including, but not limited to gas detection equipment
3.2.8
alarm-only equipment
equipment having an alarm but not having a display or other device to indicate the measured gas
concentration
3.2.9
gas detection control unit
equipment intended to provide a display indication, alarm functions, output contacts and/or alarm signal
outputs or any combinations when operated with remote sensor(s)
3.2.10
separate gas detection control unit
equipment intended to provide a display indication, alarm functions, output contacts or alarm signal outputs
or any combination when operated with gas detection transmitter(s)
3.2.11
field calibration kit
means of presenting test gas to the equipment for the purpose of calibrating, adjusting or verifying the
operation of the equipment
Note 1 to entry: The field calibration kit can be used for verifying the operation of the alarms if the concentration of the
test gas is above the alarm set-point.
Note 2 to entry: A mask for calibration and test is an example of a field calibration kit.
3.2.12
mask for calibration and test
device that can be attached to the equipment to present a test gas to the sensor in a reproducible manner
3.2.13
remote sensor
sensor that is separated from the equipment body and is connected to a gas detection control unit or to a
gas detection transmitter
3.2.14
sensor
assembly in which the sensing element is housed and that may also contain associated circuit components
3.2.15
sensing element
part of the sensor which is sensitive to the gas/vapour to be measured
3.3 Signals and alarms
3.3.1
alarm set point
setting of the equipment at which the measured concentration will cause the equipment to initiate an
indication, alarm or other output function
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3.3.2
fault signal
audible, visible or other type of output, different from the alarm signal, permitting, directly or indirectly, a
warning or indication that the equipment is not working satisfactorily
3.3.3
latching alarm
alarm that, once activated, requires deliberate action to be deactivated
3.3.4
special state
all states of the equipment other than those in which monitoring of gas concentration takes place, e.g.,
warm-up, calibration mode or fault condition
3.3.5
alarm indication
audible or visible indication activated when a pre-set concentration level is reached
3.3.6
time weighted average concentration
TWA concentration
concentration of gas in the air integrated over time and divided by the specified reference period
3.3.7
indicators
means to provide visible and/or audible information
3.3.8
output
physical interface that drives external actuators
EXAMPLES Air extractors, remote warning and alarm devices.
3.4 Times
3.4.1
drift
variation in the equipment indication with time at any fixed gas volume fraction (including clean air) under
constant ambient conditions
3.4.2
final indication
indication given by the equipment after stabilization
3.4.3
stabilization
state when three successive readings of a piece of equipment, at a constant gas volume fraction, taken at
2 min intervals or twice the respective t(90), whichever is less, indicates no changes greater than ± 1% of the
measuring range for Type I equipment, indicates no changes greater than ± the lower limit of measurement
for Type II equipment or ±1 % of the measuring range for Type III equipment
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3.4.4
time of response tx
time interval, when the equipment is in a warmed-up condition, between the time when an instantaneous
variation in volume ratio is produced at the equipment inlet and the time when the response reaches a stated
percentage (x) of the final indication
Note 1 to entry: This document refers lo t as the time of response.
90
3.4.5
warm-up time (not applicable to spot-reading equipment)
time interval, with the equipment in a stated atmosphere, between the time when the equipment is switched
on and the time when the indication reaches and remains within the stated tolerances (see Figure 1)
Figure 1 — Warm-up time in clean air (typical)
3.5 Miscellaneous
3.5.1
nominal supply voltage
voltage that is given by manufacturers as the recommended operating voltage of their gas detection
equipment
4 General requirements
4.1 Introduction
Type I equipment shall fulfil the general requirements of EN 60079-29-1.
Type II equipment shall fulfil the general requirements of EN 45544-1 in conjunction with EN 45544-2.
Type III equipment shall fulfil the general requirements of EN 45544-1 in conjunction with EN 45544-3.
Following extensions and deviations from these general requirements are applicable.
4.2 Construction
4.2.1 General
The equipment shall be constructed in such a manner that regular functional checks can be easily
undertaken by the user and that it can be equipped with suitable devices for application of test gas (field
calibration kit).
Refrigerant gas detection equipment or parts thereof (e.g. remote sensors) shall be constructed of materials
known to be resistant to degradation by the environment in which they are intended to be used. Equipment
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specifically intended for use in the presence of corrosive vapours or gases, or which can produce corrosive
by-products as a result of the detection process (e.g. catalytic oxidation or other chemical process) shall be
constructed of materials known to be resistant to corrosion by such substances.
Materials and components used in the construction of the equipment which are relevant to performance of
the equipment shall be used within the material and component manufacturer’s ratings or limitations unless
otherwise specified by appropriate safety standards. If such material and component ratings are not
available, demonstrated functionality of the equipment may be used. All materials along the gas path shall
not cause an inaccurate reading due to adsorption and absorption effects of materials in contact with the
refrigerant gas.
For aspirated equipment, inlet and outlet ports shall be unambiguously marked to ensure the correct
connection of any sample and exhaust lines.
Any malfunction of outputs from the gas detection equipment not relevant to safety or health shall not
adversely affect the functions of the equipment related to safety.
EXAMPLE Equipment with 4 mA to 20 mA and Highway Addressable Remote Transducer (HART) Protocol
communication where only the 4 mA to 20 mA communication is defined in the instruction manual as related
to safety. “If the HART communication fails no impact to the 4 mA to 20 Ma communication shall occur.”
For type II equipment, the upper limit of measurement shall be equal to or greater than 2 times the reference
value. (See Table A.1 in Annex A
4.2.2 Types and electrical protection
The equipment shall be constructed to provide the degree of protection suitable for the application in all
orientations of installation specified by the manufacturer as defined in the instruction manual or as defined by
the area classification.
NOTE Typically, the minimum requirements are:
1. IP42 for installations in machinery rooms or inside the refrigerator
2. IP44 for installations outdoor or in harsh environmental conditions, e.g. inside freezers
4.2.3 Indicating devices
4.2.3.1 General
Readily distinguishable indications shall be provided to show that the equipment is connected to an energy
source, in a state of alarm or in a special state.
Portable equipment shall provide visual and audible indications for both fault and alarm states.
Transportable or fixed equipment shall provide visual indications for both fault and alarm states. For fixed
equipment, it is permissible that the indications related to gas detection transmitters and remote sensors are
shown only at the (separate) gas detection control unit.
4.2.3.2 Display and other devices for indication of measured values
For equipment with a display to indicate gas concentrations, the gas type, concentration and unit of
measurement shall be indicated. It is pe
...
SLOVENSKI STANDARD
oSIST prEN 50676:2018
01-junij-2018
(OHNWULþQDRSUHPD]D]D]QDYDQMHKODGLOQLKSOLQRYDOL6)LQPHUMHQMHQMLKRYH
NRQFHQWUDFLMH=DKWHYH]DGHORYDQMHLQSUHVNXVQHPHWRGH
Electrical equipment used for detection and concentration measurement of refrigerant
gases or SF6 - Performance requirements and test methods.
Elektrische Geräte zur Detektion und Konzentrationsmessung von Kältemittelgasen oder
SF6 Anforderungen an das Betriebsverhalten und Prüfverfahren
Appareils électriques pour la détection et la mesure des hydrocarbures halogénés (gaz
réfrigérants) ou du SF6 - Exigences de performance et méthodes d'essai
Ta slovenski standard je istoveten z: prEN 50676:2018
ICS:
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
oSIST prEN 50676:2018 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 50676:2018
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oSIST prEN 50676:2018
EUROPEAN STANDARD DRAFT
prEN 50676
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2018
ICS
English Version
Electrical equipment used for detection and concentration
measurement of refrigerant gases or SF6 Performance
requirements and test methods.
Appareils électriques pour la détection et la mesure des Elektrische Geräte zur Detektion und
hydrocarbures halogénés (gaz réfrigérants) ou du SF6 - Konzentrationsmessung von Kältemittelgasen oder SF6
Exigences de performance et méthodes d'essai Anforderungen an das Betriebsverhalten und Prüfverfahren
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2018-07-13.
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, Serbia, 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.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 63213 Ref. No. prEN 50676:2018 E
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prEN 50676:2018
1 Contents Page
2 European foreword . 3
3 Introduction . 4
4 1 Scope . 5
5 2 Normative references . 6
6 3 Terms and definitions . 6
7 3.1 Gas properties . 6
8 3.2 Types of equipment and components . 9
9 3.3 Signals and alarms . 11
10 3.4 Times . 11
11 Figure 1 — Warm-up time in clean air (typical) . 12
12 3.5 Miscellaneous . 12
13 4 General requirements . 13
14 4.1 Introduction . 13
15 4.2 Construction . 13
16 4.3 Adjustments . 17
17 4.4 Battery-powered equipment. 18
18 4.5 Gas detection transmitter for use with separate gas detection control units . 18
19 4.6 Separate gas detection control units for use with gas detection transmitter(s) . 18
20 4.7 Equipment using software and/or digital technologies . 18
21 4.8 Labelling and marking . 18
22 4.9 Instruction manual . 19
23 5 Test methods . 22
24 5.1 Overview . 22
25 5.2 General requirements for tests . 22
26 5.3 Samples and sequence of tests . 22
27 5.4 Normal conditions for test . 25
28 5.5 Tests . 26
29 Annex A (normative) Gas specific performance requirements (EN 45544-1:2015) . 31
30 Table A.1 — Gas specific performance requirements . 31
31 Annex B (normative) Performance requirements under standard test conditions. 32
32 Table B.1 — Performance requirements under standard test conditions . 32
33 Bibliography . 38
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34 European foreword
35 This document (prEN 50676:2018) has been prepared by CLC/TC 216 “Gas detectors”.
36 This document is currently submitted to the Enquiry.
37 The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
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38 Introduction
39 PrEN 50676-1 will define test methods and performance requirements for all electrical equipment used for the
40 detection of refrigerant gases as defined in EN 378-1 as well as SF by means of concentration measurement.
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41 PrEN 50676-1 is addressed to the manufacturers of such equipment and the test laboratories which validate
42 it.
43 The tendency to use low-GWP refrigerant gases in the refrigeration and HVAC market (F-Gas Regulation) has
44 led to the consideration of safety measures for low-GWP gases as some are flammable, toxic and can cause
45 lack of oxygen.
46 Some of these refrigerants have already been taken into account by other standards such as
47 EN 60079-29-1:2016 for flammable gases and EN 45544 series for toxic gases in workplace atmospheres.
48 This standard will consider the refrigerant gases in EN 378 series not already considered in the above cited
49 standards. The level of safety shall be the same as in the already existing standards.
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50 1 Scope
51 This document will define test methods and performance requirements for all electrical equipment used for the
52 detection of the refrigerant gases as defined in EN 378-1 as well as SF by means of concentration
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53 measurement.
54 NOTE 1 For the purposes of this standard, the term “refrigerant gases” includes refrigerant gases defined in EN 378-1
55 as well as SF .
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56 This document specifies general requirements for the construction, testing and performance of electrically
57 operated refrigerant gas detection equipment in safety applications.
58 The application is intended to also consider electrical equipment in refrigeration systems according to the F-
59 Gas Regulation.
60 This document is applicable to apparatuses whose primary purpose is to provide an indication, alarm and/or
61 other output function to warn of the presence of refrigerant gases or SF in an industrial or commercial
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62 environment and, in some cases, to initiate automatic or manual protective actions. It is applicable to
63 apparatuses in which the sensor automatically generates an electrical signal when gas is present.
64 Some of these refrigerant gases could be also classified as toxic gases or vapours intended for exposure
65 measurement or as flammable gases.
66 In accordance with the classification of the gas and the tasks covered in EN 60079-29-1:2016,
67 EN 45544-2:2015 and EN 45544-3:2015 for refrigeration application, three different types of equipment are
68 provided (see also Table A.1).
69 - Type I: Refrigerant gas detection equipment for A2, A2L, R717, A3, B3 refrigerants as per safety class in
70 EN 378-1:2016 Annex E in accordance with explosion protection. The equipment shall follow the existing
71 performances in EN 60079-29-1:2016 for ranges up to 20 % LEL and or 0 % – 100 % LEL.
72 - Type II: Refrigerant gas detection equipment for A1, A2L, B1, B2L refrigerant gases as per safety class in
73 EN 378-1:2016 Annex E in accordance with OEL values. The equipment shall follow the performances in
74 EN 45544-2:2015.
75 - Type III Refrigerant gas detection equipment not covered by Type I or Type II for refrigerant gases A1,
76 A2L, B1, B2L as per safety class in EN 378-1:2016 Annex E. The equipment shall follow the performances
77 in EN 45544-3:2015
78 This document does not apply to non-refrigerant applications:
79 - monitoring of combustible gases in the range up to 20 % or up to 100 % of the LEL level, covered by
80 EN 60079-29-1:2016;
81 - workplace atmospheres, covered by the EN 45544 series.
82 This document is not applicable to equipment:
83 - used for air pollution monitoring;
84 - external sampling systems;
85 - open path gas detection;
86 - residential applications;
87 - process control;
88 - leakage (emission rate monitoring) detection system for SF .
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89 NOTE 2 SF equipment is typically located in large and ventilated rooms or outdoor, so that monitoring SF
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90 concentrations in the surrounding atmosphere does not permit a reliable detection of leakages.
91 2 Normative references
92 The following documents are referred to in the text in such a way that some or all of their content constitutes
93 requirements of this document. For dated references, only the edition cited applies. For undated references,
94 the latest edition of the referenced document (including any amendments) applies.
95 EN 378-1:2016, Refrigerating systems and heat pumps - Safety and environmental requirements - Part 1:
96 Basic requirements, definitions, classification and selection criteria
97 EN 378-3:2016, Refrigerating systems and heat pumps - Safety and environmental requirements - Part 3:
98 Installation site and personal protection
99 EN 45544-1:2015, Workplace atmospheres - Electrical apparatus used for the direct detection and direct
100 concentration measurement of toxic gases and vapours - Part 1: General requirements and test methods
101 EN 45544-2:2015, Workplace atmospheres - Electrical apparatus used for the direct detection and direct
102 concentration measurement of toxic gases and vapours - Part 2: Performance requirements for apparatus
103 used for exposure measurement
104 EN 45544-3:2015, Workplace atmospheres - Electrical apparatus used for the direct detection and direct
105 concentration measurement of toxic gases and vapours - Part 3: Performance requirements for apparatus
106 used for general gas detection
107 EN 50270:2015, Electromagnetic compatibility - Electrical apparatus for the detection and measurement of
108 combustible gases, toxic gases or oxygen
109 EN 50271:2018, Electrical apparatus for the detection and measurement of combustible gases, toxic gases or
110 oxygen - Requirements and tests for apparatus using software and/or digital technologies
111 EN 60079-0, Explosive atmospheres - Part 0: Equipment - General requirements
112 EN 60079-29-1:2016, Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of
113 detectors for flammable gases
114 EN 60529, Degrees of protection provided by enclosures (IP Code)
115 3 Terms and definitions
116 For the purposes of this document, the following terms and definitions apply.
117 ISO and IEC maintain terminological databases for use in standardization at the following addresses:
118 • IEC Electropedia: available at http://www.electropedia.org/
119 • ISO Online browsing platform: available at http://www.iso.org/obp
120 3.1 Gas properties
121 3.1.1
122 ambient air
123 normal atmosphere surrounding the equipment
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124 3.1.2
125 clean air
126 air that is free of refrigerant gases, SF and interfering or contaminating substances
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127 3.1.3
128 refrigerant
129 fluid used for heat transfer in a refrigerating system, which absorbs heat at a low temperature and a low fluid
130 pressure and expels heat at a higher temperature and a higher pressure usually involving changes of the state
131 of the fluid
132 [SOURCE: EN 378-1:2016 3.7.1]
133 3.1.4
134 flammable gas
135 gas or vapour which, when mixed with air in a certain proportion, will form an explosive atmosphere
136 3.1.5
137 toxic gas
138 general term for any gas or vapour that can be harmful to human health toxic
139 3.1.6
140 halocarbon
141 halocarbon:
142 — CFC: fully halogenated halocarbon containing only chlorine, fluorine and carbon;
143 — HCFC: halocarbon containing hydrogen, chlorine, fluorine and carbon;
144 — HFC: halocarbon containing only hydrogen, fluorine and carbon;
145 — PFC: fully fluorinated halocarbon containing only fluorine and carbon
146 [SOURCE: EN 378-1:2016 3.7.14, modified]
147 3.1.7
148 hydrocarbon
149 HC: hydrocarbon containing only hydrogen and carbon
150 [SOURCE: EN 378-1:2016 3.7.14, modified]
151 3.1.8
152 lower flammable limit
153 LFL
154 concentration of flammable gas or vapour in air, below which an explosive gas atmosphere does not form
155 Note 1 to entry: For the purposes of Ex Equipment, this is also known as lower explosive limit (LEL).
156 Note 2 to entry: The concentration may be expressed as either a volume fraction or a mass per unit volume.
157 3.1.9
158 global warming potential
159 GWP
160 climatic warming potential of a greenhouse gas relative to that of carbon dioxide (‘CO ’), calculated in terms
2
161 of the 100-year warming potential of one kilogram of a greenhouse gas relative to one kilogram of CO
2
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162 3.1.10
163 poisons
164 poisons for sensors
165 substances which lead to temporary or permanent loss of sensor sensitivity
166 3.1.11
167 volume fraction
168 v/v
169 quotient of the volume of a specified component and the sum of the volumes of all components of a gas mixture
170 before mixing, all volumes referring to the pressure and the temperature of the gas mixture
171 Note 1 to entry: The volume fraction and volume concentration take the same value if, at the same state conditions, the
172 sum of the component volumes before mixing and the volume of the mixture are equal. However, because the mixing of
173 two or more gases at the same state conditions is usually accompanied by a slight contraction or, less frequently, a slight
174 expansion, this is not generally the case.
175 Note 2 to entry: This is also known as concentration.
176 Note 3 to entry: Assuming the ideal behaviour of gases, the volume ratio coincides with the molar ratio (mol/mol). The
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177 ppm units are equivalent to the International System of Units 10 vol/vol.
178 3.1.12
179 zero gas
180 gas recommended by the manufacturer, which is free of refrigerant gases, SF , and interfering and
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181 contaminating substances, the purpose of which is calibration/adjustment of the equipment zero
182 3.1.13
183 standard test gas
184 test gas with a composition specified for each piece of equipment and gas to be used for all tests unless stated
185 otherwise
186 3.1.14
187 reference value
188 value used as the basis to specify requirements such as measuring range, resolution and alarm set point
189 3.1.15
190 measuring range
191 range of measured values of gas concentration over which the accuracy of the equipment lies within specified
192 limits
193 3.1.16
194 lower limit of measurement
195 smallest measured value within the measuring range
196 3.1.17
197 upper limit of measurement
198 largest measured value within the measuring range
199 3.1.18
200 group of gases
201 group of different gases defined by the manufacturer to be measured with one piece of equipment without
202 modification of hardware or software
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203 3.1.19
204 reference gas
205 reference gas is the representative gas of a group of gases
206 Note 1 to entry: Only the reference gas is specifically tested in correspondence with the performance
207 requirements of this present standard.
208 3.1.20
209 correction factor
210 factor defined by the manufacturer to convert the measurement values of a given gas from a group in relation
211 to the defined reference gas
212 Note 1 to entry: The correction factor may not exceed the limits of min. 0,25 to max. 4.
213 3.1.21
214 acute-toxicity exposure limit
215 ATEL
216 concentration of a refrigerant designated to prevent problems resulting from acute toxicity
217 3.1.22
218 occupational exposure limit value
219 OELV
220 limit of the time-weighted average of the concentration of a chemical agent in the air within the breathing zone
221 of a worker in relation to a specified reference period
222 Note 1 to entry: The term “limit value” is often used as a synonym for “occupational exposure limit value”, but the term
223 “occupational exposure limit value” is preferred because there is more than one limit value (e.g., biological limit value and
224 occupational exposure limit value).
225 Note 2 to entry: Occupational exposure limit values (OELVs) are often set for reference periods of 8 h, but can also be
226 set for shorter periods or concentration excursions.
227 3.1.23
228 machinery
229 refrigerating equipment forming a part of the refrigerating system, including, but not limited to, any or all of the
230 following: compressor, condenser, liquid receiver, evaporator and connecting piping
231 3.1.24
232 machinery room
233 space that is designed to house compressors and pressure vessels
234 3.1.25
235 control room
236 location where relevant personnel are stationed on a full-time basis for implementing various measures if alarm
237 is initiated
238 3.2 Types of equipment and components
239 3.2.1
240 aspirated equipment
241 equipment that samples the gas by drawing it to the gas sensor, e.g. by means of a hand-operated or electric
242 pump
243 3.2.2
244 continuous duty equipment
245 equipment that is powered for long periods of time, but may have either continuous or intermittent sensing
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246 3.2.3
247 diffusion equipment
248 equipment in which the transfer of gas from the atmosphere to the gas sensor takes place by random molecular
249 movement, i.e. under conditions in which there is no aspirated flow
250 3.2.4
251 fixed equipment
252 equipment that is intended to have all parts permanently installed
253 3.2.5
254 portable equipment
255 battery powered, spot-reading or continuous duty equipment that has been designed to be readily carried from
256 place to place and to be used while it is being carried and includes but is not limited to:
257 a) hand-held equipment, typically less than 1 kg, which requires use of only one hand to operate,
258 b) personal monitors, similar in size and mass to hand-held equipment, that are continuously operating (but
259 not necessarily continuously sensing) while they are attached to the user, and
260 c) larger equipment that can be operated by the user while it is carried either by hand, by a shoulder strap
261 or carrying harness and which may or may not have a hand directed probe
262 3.2.6
263 transportable equipment
264 equipment not intended to be portable but which can be readily moved from one place to another
265 3.2.7
266 gas detection transmitter
267 fixed gas detection equipment that provide a conditioned electronic signal or output indication to a generally
268 accepted industry standard (such as 4 mA to 20 ma), intended to be utilized with separate gas detection control
269 units or signal processing data acquisition, central monitoring and similar systems, which typically process
270 information from various locations and sources including, but not limited to gas detection equipment
271 3.2.8
272 alarm-only equipment
273 equipment having an alarm but not having a display or other device to indicate the measured gas concentration
274 3.2.9
275 gas detection control unit
276 equipment intended to provide a display indication, alarm functions, output contacts and/or alarm signal
277 outputs or any combinations when operated with remote sensor(s)
278 3.2.10
279 separate gas detection control unit
280 equipment intended to provide a display indication, alarm functions, output contacts or alarm signal outputs or
281 any combination when operated with gas detection transmitter(s)
282 3.2.11
283 calibration mask
284 device that when applied to the sensor provides the continuous and renovated gas supply to the sensor such
285 that the gas concentration reaching the sensing element remains unchanged
286 3.2.12
287 remote gas sensor
288 sensor that is not integral to the main body of the equipment
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289 3.2.13
290 sensor
291 assembly in which the sensing element is housed and that may also contain associated circuit components
292 3.2.14
293 sensing element
294 part of the sensor which is sensitive to the gas/vapour to be measured
295 3.3 Signals and alarms
296 3.3.1
297 alarm set point
298 fixed or adjustable equipment setting that is intended to pre-set the level of concentration at which the
299 equipment will automatically initiate an indication, alarm or other output function
300 3.3.2
301 fault signal
302 audible, visible or other type of output, different from the alarm signal, permitting, directly or indirectly, a warning
303 or indication that the equipment is not working satisfactorily
304 3.3.3
305 latching alarm
306 alarm that, once activated, requires deliberate action to be deactivated
307 3.3.4
308 special state
309 all states of the equipment other than those in which monitoring of gas concentration takes place, e.g., warm-
310 up, calibration mode or fault condition
311 3.3.5
312 alarm indication
313 audible or visible indication activated when a pre-set concentration level is reached
314 3.3.6
315 time weighted average concentration
316 TWA concentration
317 concentration of gas in the air integrated over time and divided by the specified reference period
318 3.3.7
319 indicators
320 means to provide visible and/or audible information
321 3.3.8
322 output
323 physical interface that drives external actuators
324 EXAMPLES Air extractors, remote warning and alarm devices.
325 3.4 Times
326 3.4.1
327 drift
328 variation in the equipment indication with time at any fixed gas volume fraction (including clean air) under
329 constant ambient conditions
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330 3.4.2
331 final indication
332 indication given by the equipment after stabilization
333 3.4.3
334 stabilization
335 state when three successive readings of a piece of equipment, at a constant gas volume fraction, taken at
336 2 min intervals or twice the respective t(90), whichever is less, indicates no changes greater than ± 1% of the
337 measuring range time of response t(x) (not applicable to spot-reading equipment) for Type I equipment,
338 indicates no changes greater than ± the lower limit of measurement for Type II equipment or ±1 % of the
339 measuring range for Type III equipment
340 3.4.4
341 time of response tx
342 time interval, when the equipment is in a warmed-up condition, between the time when an instantaneous
343 variation in volume ratio is produced at the equipment inlet and the time when the response reaches a stated
344 percentage (x) of the final indication
345 Note 1 to entry: This European Standard refers lo t as the time of response.
90
346 3.4.5
347 warm-up time (not applicable to spot-reading equipment)
348 time interval, with the equipment in a stated atmosphere, between the time when the equipment is switched
349 on and the time when the indication reaches and remains within the stated tolerances (see Figure 1)
350
351 Figure 1 — Warm-up time in clean air (typical)
352 3.5 Miscellaneous
353 3.5.1
354 nominal supply voltage
355 voltage that is given by manufacturers as the recommended operating voltage of their gas detection equipment
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356 4 General requirements
357 4.1 Introduction
358 Equipment shall conform to the requirements of 4.2, where applicable.
359 In addition to the requirements of this standard, parts of the gas and/or vapour detection equipment intended
360 for use in explosive atmospheres shall comply with the relevant construction and explosion protection
361 requirements as specified in the EN 60079 series of standards. The ambient temperature and pressure ranges
362 of such equipment conforming to this standard shall not exceed the ambient temperature and pressure ranges
363 of the Type(s) of Protection.
364 4.2 Construction
365 4.2.1 General
366 The equipment shall be constructed in such a manner that regular functional checks can be easily undertaken
367 by the user and that it can be equipped with suitable devices for application of test gas (field calibration kit).
368 Refrigerant gas detection equipment or parts thereof (e.g. remote sensors) shall be constructed
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