SIST EN 50104:2010
(Main)Electrical apparatus for the detection and measurement of oxygen - Performance requirements and test methods
Electrical apparatus for the detection and measurement of oxygen - Performance requirements and test methods
This European Standard specifies general requirements for construction, testing and performance, and describes the test methods that apply to portable, transportable and fixed apparatus for the measurement of the oxygen concentration in gas mixtures indicating up to 25 % (v/v). The apparatus, or parts thereof, may be intended for use in potentially explosive atmospheres (see 4.1) and in mines susceptible to firedamp. In the case of inert gas purging (inertization), it applies also to apparatus with an oxygen measuring function for explosion protection.
Elektrische Geräte für die Detektion und Messung von Sauerstoff - Anforderungen an das Betriebsverhalten und Prüfverfahren
Appareils électriques de détection et de mesure de l'oxygène - Règles de performance et méthodes d'essai
La présente Norme européenne spécifie des exigences générales de construction, d'essais et de performance s'appliquant aux appareils mobiles, transportables et fixes de mesure de la concentration en oxygène dans les mélanges gazeux comportant jusqu'à 25 % (v/v) d'oxygène, et elle décrit les méthodes d’essais. Les appareils, ou une partie de ceux-ci, peuvent être prévus pour fonctionner dans des atmosphères potentiellement explosives (voir 4.1) et dans des mines grisouteuses. Dans le cas de purges par gaz inerte (inertage), elle s’applique également aux appareils possédant une fonction de mesure de l’oxygène pour la protection contre les explosions. NOTE Les capteurs d'oxygène communément utilisés dans le matériel commercial destiné aux applications industrielles sont les suivants: a) capteurs paramagnétiques; b) capteurs électrochimiques (électrolytes liquides et solides); c) capteurs de spectroscopie d'absorption par diode laser accordable (TDLAS). La présente Norme est également applicable lorsqu'un constructeur déclare une caractéristique de construction particulière ou des performances dépassant les exigences minimales de la présente Norme. Toutes ces déclarations doivent être vérifiées et si nécessaire, des procédures d’essai doivent être étendues ou ajoutées pour vérifier les performances annoncées. Les essais supplémentaires doivent être définis par accord entre le constructeur et le laboratoire d'essais, identifiés et décrits dans le rapport d'essais. La présente Norme européenne est applicable aux appareils d’alarme pour l’oxygène destinés à mesurer de manière fiable la concentration en oxygène, à fournir une indication, une alarme ou une autre fonction de sortie, dans le but d’avertir d’un risque et dans certains cas, de déclencher une ou plusieurs actions automatique(s) ou manuelle(s) de protection dès que le niveau se situe au-dessus ou en dessous d’une concentration d’alarme préétablie. La présente Norme est applicable aux appareils, y compris aux systèmes d’échantillonnage intégrés des appareils à aspiration, destinés à des applications de sécurité dans des emplacements commerciaux, industriels, non résidentielles. La présente Norme n’est pas applicable aux systèmes d’échantillonnage externes ou au matériel de laboratoire scientifique ou médical, ou au matériel utilisé uniquement pour le contrôle de processus. Dans le cas des appareils utilisés pour détecter la présence de plusieurs gaz, la présente Norme ne s'applique qu'aux mesures d'oxygène. La présente Norme est également applicable aux appareils utilisant des principes optiques (par exemple, TDLAS), pour lesquels l'émetteur et le récepteur optiques ou l'émetteur-récepteur (c'est-à-dire l'émetteur et le récepteur combinés) et un réflecteur approprié ne sont pas situés dans une enveloppe commune. Toutefois, dans ce cas, il sera nécessaire de modifier les conditions d'essai décrites à l'Article 5 et d'introduire des essais supplémentaires à l'Article 6 de la présente Norme. Ces essais supplémentaires comprendront l'alignement, le défaut de blocage du faisceau et le fonctionnement longue portée. Des lignes directrices concernant la modification appropriée des conditions d'essai et les essais supplémentaires peuvent être tirées de la EN 60079 29 4. Les modifications des conditions d'essai, ainsi que les essais modifiés et supplémentaires doivent être définis par accord entre le constructeur et le laboratoire d'essais; identifiés et décrits dans le rapport d'essais.
Električne naprave za odkrivanje in merjenje kisika - Zahteve za delovanje in preskusne metode
Ta evropski standard določa splošne zahteve za izgradnjo, preskušanje in delovanje, ter opisuje preskusne metode, ki veljajo za prenosne, premične in fiksne aparate za merjenje koncentracije kisika v plinskih mešanicah, ki kažejo do 25 % (v/v). Aparat ali njegovi deli so lahko namenjeni uporabi v potencialno eksplozivnih atmosferah (glej točko 4.1) in v rudnikih, dovzetnih za jamski plin. V primeru inertnega čistilnega plina (inertizacija) velja tudi za aparate z funkcijo merjenja kisika za varovanje pred eksplozijami.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 50104:2010
01-september-2010
1DGRPHãþD
SIST EN 50104:2002
SIST EN 50104:2002/A1:2004
(OHNWULþQHQDSUDYH]DRGNULYDQMHLQPHUMHQMHNLVLND=DKWHYH]DGHORYDQMHLQ
SUHVNXVQHPHWRGH
Electrical apparatus for the detection and measurement of oxygen - Performance
requirements and test methods
Elektrische Geräte für die Detektion und Messung von Sauerstoff - Anforderungen an
das Betriebsverhalten und Prüfverfahren
Appareils électriques de détection et de mesure de l'oxygène - Règles de performance et
méthodes d'essai
Ta slovenski standard je istoveten z: EN 50104:2010
ICS:
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
29.260.20 (OHNWULþQLDSDUDWL]D Electrical apparatus for
HNVSOR]LYQDR]UDþMD explosive atmospheres
SIST EN 50104:2010 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 50104:2010
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SIST EN 50104:2010
EUROPEAN STANDARD
EN 50104
NORME EUROPÉENNE
June 2010
EUROPÄISCHE NORM
ICS 13.320 Supersedes EN 50104:2002 + A1:2004
English version
Electrical apparatus for the detection and measurement of oxygen -
Performance requirements and test methods
Appareils électriques de détection Elektrische Geräte für die Detektion
et de mesure de l'oxygène - und Messung von Sauerstoff -
Règles de performance et méthodes Anforderungen an das Betriebsverhalten
d'essai und Prüfverfahren
This European Standard was approved by CENELEC on 2010-06-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia,
Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2010 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
-
Ref. No. EN 50104:2010 E
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Foreword
This European Standard was prepared by SC 31-9, Electrical apparatus for the detection and
measurement of combustible gases to be used in industrial and commercial potentially explosive
atmospheres, of Technical Committee CENELEC TC 31, Electrical apparatus for potentially explosive
atmospheres, on the basis of EN 50104:2002. It was submitted to the Unique Acceptance Procedure and
approved by CENELEC as EN 50271 on 2010-06-01.
This document supersedes EN 50104:2002 + A1:2004.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement
(dop) 2011-06-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn
(dow) 2013-06-01
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and covers essential requirements of EC Directive
94/9/EC. See Annex ZZ.
The State of the Art is included in Annex ZY “Significant changes between this European Standard and
EN 50104:2002”.
__________
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Contents
Contents . 3
1 Scope . 4
2 Normative references . 4
3 Definitions . 5
3.1 Gas properties . 5
3.2 Types of apparatus . 5
3.3 Sensors . 6
3.4 Supply of gas to apparatus . 7
3.5 Signals and alarms . 7
3.6 Times . 7
4 General requirements . 8
4.1 Introduction . 8
4.2 Construction . 8
4.3 Labelling and marking . 10
4.4 Instruction manual . 10
5 Test methods . 12
5.1 Introduction . 12
5.2 General requirements for tests . 12
5.3 Normal conditions for test . 13
5.4 Test methods and performance requirements . 15
Annex A (informative) Sequence of tests . 27
Annex ZY (informative) Significant changes between this European Standard
and EN 50104:2002 . 28
Annex ZZ (informative) Coverage of Essential Requirements of EC Directives . 29
Figure
Figure 1 - Warm-up time in reference air or in zero test gas (typical) . 26
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1 Scope
This European Standard specifies general requirements for construction, testing and performance, and
describes the test methods that apply to portable, transportable and fixed apparatus for the measurement
of the oxygen concentration in gas mixtures indicating up to 25 % (v/v). The apparatus, or parts thereof,
may be intended for use in potentially explosive atmospheres (see 4.1) and in mines susceptible to
firedamp.
In the case of inert gas purging (inertization), it applies also to apparatus with an oxygen measuring
function for explosion protection.
NOTE Commonly used oxygen sensors in commercial equipment for industrial application are:
a) paramagnetic sensors;
b) electrochemical sensors (aqueous and solid electrolytes);
c) tunable diode laser absorption spectroscopy sensors (TDLAS).
This standard is also applicable when an apparatus manufacturer makes any claims regarding any special
features of construction or superior performance that exceed the minimum requirements of this standard.
All such claims shall be verified and the test procedures shall be extended or supplemented, where
necessary, to verify the claimed performance. The additional tests shall be agreed between the
manufacturer and test laboratory and identified and described in the test report.
This European Standard is applicable to oxygen alarm apparatus intended to measure reliably the oxygen
concentration, to provide an indication, alarm or other output function, the purpose of which is to give a
warning of a potential hazard and, in some cases, to initiate automatic or manual protective action(s),
whenever the level exceeds or falls below a preselected alarm concentration.
This standard is applicable to apparatus, including integral sampling systems of aspirated apparatus,
intended to be used for commercial, industrial and non-residential safety applications.
This standard does not apply to external sampling systems, or to apparatus of laboratory or scientific type,
or to medical equipment, or to apparatus used only for process control purposes. For apparatus used for
sensing the presence of multiple gases, this standard applies only to the measurement of oxygen.
This standard is also applicable to apparatus using optical principles (e.g. TDLAS), where the optical
transmitter and receiver or the optical transceiver (i.e. combined transmitter and receiver) and a suitable
reflector are not located in a common enclosure. However, in this case it will be necessary to modify the
test conditions described in Clause 5 and to introduce supplementary tests to Clause 6 of this standard.
Such supplementary tests will include alignment, beam block fault, long range operation. Guidance to
appropriate modification of the test conditions and supplementary tests may be taken from
EN 60079-29-4. Modifications of the test conditions as well as modified and supplementary tests shall be
agreed between the manufacturer and test laboratory and identified and described in the test report.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
Electromagnetic compatibility - Electrical apparatus for the detection and
EN 50270
measurement of combustible gases, toxic gases or oxygen
Electrical apparatus for the detection and measurement of combustible
EN 50271
gases, toxic gases or oxygen - Requirements and tests for apparatus using
software and/or digital technologies
Explosive atmospheres - Part 0: Equipment - General requirements
EN 60079-0
(IEC 60079-0)
Explosive atmospheres - Part 29-4: Gas detectors - Performance
EN 60079-29-4
requirements of open path detectors for flammable gases (IEC 60079-29-4)
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3 Definitions
For the purposes of this document, the following terms and definitions apply.
3.1 Gas properties
3.1.1
ambient air
normal atmosphere surrounding the apparatus
3.1.2
poisons (for sensors)
substances which lead to temporary or permanent loss of sensitivity of the sensors
3.1.3
reference air
air, under normal ambient conditions, with an oxygen concentration of (21 ± 0,4) % (v/v)
3.1.4
standard test gas
test gas with a composition specified for each apparatus to be used for all tests unless otherwise stated
(see 5.3.2)
3.1.5
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 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.
3.1.6
zero test gas
gas, such as nitrogen, which is free of oxygen, and interfering and contaminating substances
3.2 Types of apparatus
3.2.1
alarm-only apparatus
apparatus having an alarm but not having a meter or other indicating device
3.2.2
aspirated apparatus
apparatus that samples the gas by drawing it to the gas sensor, for example, by means of a hand-
operated or electric pump
3.2.3
automatically aspirated apparatus
aspirated apparatus with an integral pump
3.2.4
continuous duty apparatus
apparatus that is powered for long periods of time, but may have either continuous or intermittent sensing
3.2.5
diffusion apparatus
apparatus in which the transfer of gas from the atmosphere to the gas sensor takes place by random
molecular movement, i.e. under conditions in which there is not aspirated flow
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3.2.6
fixed apparatus
apparatus that is intended to have all parts permanently installed
3.2.7
portable apparatus
apparatus that has been designed to be carried readily from place to place and to be used while it is being
carried. A portable apparatus is battery powered and includes, but is not limited to
a) a hand-held apparatus, typically less than 1 kg, suitable for one-handed operation without accessories
(such as sampling probes, sample lines) fitted,
b) personal monitors, similar in size and mass to the hand-held apparatus, that are continuously operating
(but not necessarily continuously sensing) while they are attached to the user, and
c) another apparatus 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
3.2.8
spot-reading apparatus
apparatus intended to be used for short, intermittent or irregular periods of time as required (typically
5 min or less)
3.2.9
transportable apparatus
apparatus not intended to be portable, but which can be readily moved from one place to another
3.2.10
stand-alone gas detection apparatus
fixed gas detection apparatus that provide a conditioned electronic signal or output indication to a
generally accepted industry standard (such as 4-20 mA), intended to be utilized with stand-alone 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 apparatus
3.2.11
stand-alone control unit
fixed gas detection control units intended to provide meter indication, alarm functions, output contacts
and/or alarm signal outputs when utilized with stand-alone gas detection apparatus
3.3 Sensors
3.3.1
integral sensor
sensor which is integral to the main body of the apparatus
3.3.2
measuring principle
type of physical or physico-chemical detection principle and the measurement procedure to determine the
measured value
3.3.3
remote sensor
sensor which is not integral to the main body of the apparatus
3.3.4
sensing element
part of the sensor which directly picks up the quantity to be measured and which is sensitive to that
quantity
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3.3.5
sensor
assembly in which the sensing element is housed and which may also contain associated circuit
components
3.4 Supply of gas to apparatus
3.4.1
sample line
a means by which the gas being sampled is conveyed to the sensor including accessories, e.g. filter,
water trap
3.4.2
sampling probe
separate sample line which is attached to the apparatus as required, that may or may not be supplied with
the apparatus. It is usually short (e.g. in the order of 1 m) and rigid (although it may be telescopic), but it
may be connected by a flexible tube to the apparatus
3.5 Signals and alarms
3.5.1
alarm set point
fixed or adjustable setting of the apparatus that is intended to pre-set the level of concentration at which
the apparatus will automatically initiate an indication, alarm or other output function
3.5.2
fault signal
audible, visible or other type of output, different from the alarm signal, permitting, directly or indirectly, a
warning or indication that the apparatus is not working satisfactorily
3.5.3
latching alarm
alarm that, once activated, requires deliberate action to be deactivated
3.5.4
repeatability
closeness of agreement between the results of successive measurements of the same value of the same
quantity carried out by the same method, with the same measuring instruments, by the same observer, in
the same laboratory at quite short intervals of time in unchanged conditions
3.6 Times
3.6.1
drift
variation in the apparatus indication with time, at any fixed gas volume fraction under constant ambient
conditions
3.6.2
final indication
indication given by the apparatus after stabilisation
3.6.3
stabilisation
state when three successive readings of an apparatus, taken at 2 min intervals, indicate no changes
greater than ± 1 % of the measuring range
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3.6.4
time of response tx (not applicable to spot-reading apparatus)
time interval, with the apparatus in a warmed-up condition, between the time when an instantaneous
variation in volume fraction is produced at the apparatus inlet and the time when the response reaches a
stated percentage (x) of the difference between the initial and the final indication
3.6.5
minimum time to operate (spot-reading apparatus)
time interval between the initiation of a measurement procedure and the time when the apparatus
indication reaches a stated percentage of the final indication
3.6.6
warm-up time (not applicable to spot-reading apparatus)
time interval, with the apparatus in a stated atmosphere, between the time when the apparatus is switched
on and the time when the indication reaches and remains within the stated tolerances (see Figure 1)
4 General requirements
4.1 Introduction
The apparatus shall comply with the requirements of this standard.
Electrical assemblies and components shall comply with the construction and test requirements of 4.2,
where applicable. In addition, parts of the gas detection apparatus intended for use in potentially explosive
atmospheres shall employ materials, and comply with the construction and explosion protection as
specified in the appropriate regulations for explosion protection.
4.2 Construction
4.2.1 General
Gas detection apparatus or parts thereof (e.g. remote sensors) specifically intended for use in the
presence of corrosive vapours or gases shall be constructed of materials known to be resistant to
corrosion by such substances.
All apparatus shall be constructed to facilitate regular accuracy checks.
All materials and components used in the construction of the apparatus shall be used within the
manufacture’s ratings or limitations unless otherwise specified by appropriate safety standards.
4.2.2 Indicating devices
An indication shall be provided to show that the apparatus is energised.
NOTE The indication may be shown at the control unit.
For alarm-only apparatus or apparatus where the resolution of the read-out device is inadequate to
demonstrate compliance with this standard, the manufacturer shall identify suitable points for connecting
additional indicating or recording devices for the purpose of testing the compliance of the apparatus with
this standard. The indication on the read-out device of the apparatus shall not contradict the results
obtained by the additional indicating or recording devices.
Any under-range or over-range measurements shall be clearly indicated.
If the apparatus has more than one measuring range, the range selected shall be clearly identified.
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If only one indicating light is provided for signalling alarms, faults and other indications, it shall be coloured
red. If separate indicating lights are used or if a multi-coloured indicating light is provided, the colours shall
be used in the following order of priority ((a) being highest priority):
a) alarms indicating the presence of gas at potentially dangerous levels shall be coloured RED;
b) equipment fault indicators shall be coloured YELLOW;
c) power supply indicators shall be coloured GREEN.
In addition to the colour requirements, the indicator lights shall be adequately labelled to show their
functions.
4.2.3 Alarm or output functions
Alarm devices shall not be adjustable to operate outside the measuring range.
If alarm devices, output contacts or alarm signal outputs are provided as part of fixed or continuous duty
portable apparatus and are intended to operate when a potentially hazardous gas concentration is
detected, they shall be of a latching type requiring a deliberate manual action to reset. If two or more
alarm set points having the same direction (activation at increasing or decreasing oxygen concentration,
respectively) are provided, the first alarm may be non-latching - based on user preference.
NOTE 1 The latching device may reside in software.
Alarms shall remain in operation while the alarm condition is still present. An additional audible alarm may
be silenced.
NOTE 2 This implies that it may not be possible to switch off the apparatus if an alarm condition is present.
If it is possible to de-activate alarm devices, output contacts or alarm signal outputs, e.g. for calibration
purposes, this deactivation shall be indicated by a signal. For fixed apparatus, this shall include a contact
or other transmittable output signal. Alternatively, the output signal or contacts are not required if the
alarms are automatically re-enabled within 15 min.
4.2.4 Fault signal
Fixed and transportable apparatus shall provide a fault signal in the event of failure of power to the
apparatus. A short circuit or open circuit in connections to any remote sensor shall be indicated by a fault
signal.
Automatically aspirated apparatus shall be provided
a) in the case of fixed and transportable apparatus: with an integral flow-indicating device that produces a
fault signal in the event of flow failure,
b) in the case of portable apparatus: with a means of verifying the air flow.
4.2.5 Adjustments
All adjustment devices shall be designed so as to discourage unauthorised or inadvertent interference with
the apparatus. Examples would include procedural devices, in the case of a keyboard instrument, or
mechanical devices such as a cover requiring the use of a tool.
Fixed explosion-protected apparatus housed in explosion-protected enclosures shall be designed so that,
if any facilities for adjustments are necessary for routine recalibration and for resetting or like functions,
these facilities shall be externally accessible. The means for making adjustments shall not degrade the
explosion protection of the apparatus.
The adjustments of the zero and signal amplification shall be so designed that adjustments of one will not
affect the other.
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4.2.6 Battery-powered apparatus
Apparatus powered with integral batteries shall be provided with an indication of low battery condition, and
the nature and purpose of this indication shall be explained in the manual.
4.2.7 Stand-alone gas detection apparatus for use with separate control units
A specification shall be supplied with the apparatus that describes the relationship the gas concentration
(detected by the apparatus) has with the corresponding output signal or indication (transfer function). Such
specification shall be detailed to the extent that the accuracy of this transfer function can be verified. As a
minimum, the manufacturer shall provide data showing the relationship between the output signal and the
gas concentrations corresponding to 0,10 %, 25 %, 50 %, 75 % and 100 % of full-scale output indication.
Full-scale output and status signals (e.g. fault, inhibit) shall also be specified by the manufacturer.
Where necessary, equipment shall be provided by the manufacturer to interpret the output signal or
indication, which will enable the accuracy of the transfer function to be verified.
4.2.8 Separate control units for use with stand-alone gas detection apparatus
A specification shall be supplied with the apparatus that describes the relationship the input signal has
with the calculated gas concentration (transfer function). Such specification shall be detailed to the extent
that the accuracy of this transfer function can be verified. As a minimum, the manufacturer shall provide
data showing the relationship between the input signal and the gas concentrations corresponding to
0,10 %, 25 %, 50 %, 75 % and 100 % of full-scale indication. Required inputs for full-scale indication and
status signals (e.g. fault, inhibit) shall also be specified by the manufacturer.
Where necessary, equipment shall be provided by the manufacturer to provide the input signals, which will
enable the accuracy of the transfer function to be verified.
4.2.9 Apparatus using software and/or digital technologies
The apparatus shall fulfil the requirements of EN 50271.
4.3 Labelling and marking
The apparatus shall be marked legibly and indelibly. The following minimum requirements apply:
a) name and address of the manufacturer;
b) certification marking;
c) designation of series or type;
d) serial number, if any;
e) year of construction (may be encoded within the serial number);
f) “EN 50104” (to represent conformance with this performance standard). If due to size constraints this
information cannot be put onto the apparatus, it shall be included in the instruction manual;
g) If applicable, the apparatus shall comply with the additional marking requirements of EN 60079-0.
4.4 Instruction manual
Each apparatus shall be provided with an instruction manual that includes the following information:
a) complete instructions, drawings and diagrams for safe and proper operation, installation and servicing
of the apparatus;
b) adjustment procedures;
c) recommendations for initial checking and calibration of the apparatus on a routine basis, including
procedures and time intervals
NOTE Users are referred to EN 60079-29-2.
d) instructions for the use of the field verification kit including sample flow rate limits, if provided;
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e) details of operational limitations including, where applicable, the following:
1) intended use (oxygen deficiency, oxygen enrichment, inertization);
2) whether the apparatus is intended to be used in potentially explosive atmospheres;
3) measuring principles and description of the apparatus functions;
4) time of response t ;
90
5) temperature limits;
6) humidity limits;
7) pressure limits;
8) supply voltage limits;
9) maximum power consumption;
10) relevant characteristics and construction details of required interconnecting cables;
11) for battery operated apparatus, battery type(s) and operating time(s) until low battery condition;
12) nominal orientation and orientation limits;
13) safety-related significance of the measuring sequence in non-continuous operation and
possibilities of adapting the measuring sequence to the monitoring tasks;
14) warm-up time;
15) stabilisation time;
16) gas mixtures expressly prohibited by the manufacturer;
f) details of storage life and limitations for the apparatus, replacement parts and accessories, including,
where applicable, the following limits:
1) temperature;
2) humidity;
3) pressure;
4) time;
g) information on the adverse effects of poisons and interfering gases or substances on the proper
performance (and, in the case of oxygen-enriched atmospheres, on electrical safety) of the apparatus;
h) for aspirated apparatus, indication of the minimum and maximum flow rates and pressure, or,
for automatically aspirated apparatus, indication of the nominal flow rate and the flow rate where the
flow failure signal is set or, if adjustable, the range of flow rates where the flow failure signal can be set;
i) for aspirated apparatus, tubing type, maximum length and size for proper operation;
j) for aspirated apparatus, instructions for ensuring that the sample lines are intact and that proper flow is
established (see 4.2.4);
k) statements of the nature and significance of all alarms and fault signals, the duration of such alarms
and signals (if time-limited or non-latching), and any provisions that may be made for silencing or
r
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