ENV 14236:2002
(Main)Ultrasonic domestic gas meters
Ultrasonic domestic gas meters
This European Pre-standard specifies requirements and tests for the construction, performance and safety of battery powered ultrasonic gas meters (hereinafter referred to as meters), having co-axial single pipe, or two pipe connections, used to measure volumes of distributed fuel gases of the first and/or second and/or third family, as given in EN 437, at maximum working pressures of up to 0,5 bar ) and maximum actual flow rates of up to 10 m³/h over a minimum ambient and gas temperature range of -10 °C to +40 °C, for domestic applications. This Pre-standard applies to meters where the measuring element and the register(s) are enclosed in the same case.
Unless otherwise stated, all pressures given in this document are gauge pressures.
Clauses 1 to 15 and annex B are for design and type testing only.
NOTE See annex A for production requirements
Ultraschall-Haushaltsgaszähler
Diese Europäische Vornorm legt die Anforderungen und Prüfungen hinsichtlich der Konstruktion, Leistung und Sicherheit von batterieangetriebenen Ultraschallgaszählern (im Folgenden Zähler genannt), die einen Einstutzen- oder Zweistutzenanschluss aufweisen und zur Volumenmessung von verteilten Brenngasen der ersten und/oder zweiten und/oder dritten Gasfamilie, wie in EN 437 angegeben, bei maximalen Betriebsdrücken bis 0,5 bar ), und maximalen Durchflüssen bis 10 m3/h bei einem Umgebungs- und Gastemperaturbereich von mindestens -10 °C bis +40 °C für Haushaltsanwendungen eingesetzt werden, fest. Diese Vornorm gilt für Zähler, bei denen das Messelement und die Anzeige(n) im selben Gehäuse untergebracht sind.
Soweit nicht anders angegeben, handelt es sich bei allen in diesem Dokument verwendeten Drücken um Überdrücke.
Die Abschnitte 1 bis 15 und Anhang B gelten nur für Auslegung und Typprüfung.
ANMERKUNG Siehe Anhang A für Produktionsanforderungen.
Compteurs à gaz domestiques à ultrasons
La présente Prénorme européenne spécifie les exigences et essais de construction, de performance et de sécurité des compteurs de gaz à ultrasons alimentés par accumulateur (ci-après appelés compteurs), ayant des connexions coaxiales à un seul tuyau ou à deux tuyaux, utilisés pour mesurer les volumes de gaz combustibles distribués de la première et/ou deuxième et/ou troisième familles, tels qu'indiquées dans l'EN 437, à des pressions maximales de service pouvant atteindre 0,5 bar ) et à des débits réels maximaux pouvant atteindre 10 m³/h sur une plage minimale de température ambiante et de température de gaz de -10 °C à +40 °C, pour des applications domestiques. La présente prénorme s'applique à des compteurs dont l'élément de mesure et le ou les enregistreurs sont enfermés dans le même boîtier.
Sauf indication contraire, toutes les pressions fournies dans le présent document sont des pressions relatives.
Les articles 1 à 15 et l'annexe B sont fournis uniquement pour la conception et les essais de type.
NOTE Se reporter à l'annexe A pour les exigences liées à la production.
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST ENV 14236:2004
01-februar-2004
8OWUD]YRþQLSOLQRPHUL]DJRVSRGLQMVWYD
Ultrasonic domestic gas meters
Ultraschall-Haushaltsgaszähler
Compteurs a gaz domestiques a ultrasons
Ta slovenski standard je istoveten z: ENV 14236:2002
ICS:
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
SIST ENV 14236:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN PRESTANDARD
ENV 14236
PRÉNORME EUROPÉENNE
EUROPÄISCHE VORNORM
July 2002
ICS 91.140.40
English version
Ultrasonic domestic gas meters
This European Prestandard (ENV) was approved by CEN on 25 March 2002 as a prospective standard for provisional application.
The period of validity of this ENV is limited initially to three years. After two years the members of CEN will be requested to submit their
comments, particularly on the question whether the ENV can be converted into a European Standard.
CEN members are required to announce the existence of this ENV in the same way as for an EN and to make the ENV available promptly
at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the ENV) until the final
decision about the possible conversion of the ENV into an EN is reached.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. ENV 14236:2002 E
worldwide for CEN national Members.
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ENV 14236:2002 (E)
Contents
page
Foreword .6
1 Scope.7
2 Normative references.7
3 Terms, definitions and symbols .9
3.1 Terms and definitions.9
3.2 Symbols .12
4 Normal operating conditions .12
4.1 Flow range .12
4.2 Maximum working pressure.13
4.3 Temperature range.13
4.4 Range of gases.13
4.4.1 General .13
4.4.2 Test gases.13
4.4.3 Test gas properties .14
5 Metrological performance .15
5.1 General .15
5.2 Mode comparison.15
5.2.1 General .15
5.2.2 Requirements .16
5.2.3 Test .16
5.3 Permissible errors.16
5.3.1 Requirements .16
5.3.2 Test .16
5.4 Gas — air relationship .17
5.4.1 General .17
5.4.2 Requirements .17
5.4.3 Test .19
5.5 Pressure absorption .19
5.5.1 Requirements .19
5.5.2 Test .19
5.6 Metrological stability.19
5.6.1 Requirements .19
5.6.2 Test .19
5.7 Immunity to contaminants in gas stream .19
5.7.1 Requirements .19
5.7.2 Test .19
5.7.3 Specification of contamination dust .21
5.8 Installation effects.21
5.8.1 Requirements .21
5.8.2 Test .21
5.9 Zero flow .21
5.9.1 Requirements .21
5.9.2 Test .22
5.10 Reverse flow .22
5.10.1 Requirements .22
5.10.2 Test .22
5.11 Low flow registration .22
5.11.1 Requirement .22
2
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ENV 14236:2002 (E)
5.11.2 Test .22
5.12 High flow registration .22
5.12.1 Requirement .22
5.12.2 Test .22
5.13 Pulsed (unsteady) flow .22
5.13.1 General .22
5.13.2 Requirements .23
5.13.3 Test .23
5.14 Temperature sensitivity.24
5.14.1 Requirements .24
5.14.2 Test .24
6 Construction and materials.24
6.1 General .24
6.2 Robustness of meter case .24
6.2.1 General .24
6.2.2 Protection against penetration of dust and water .24
6.2.3 Resistance to internal pressure.25
6.2.4 External leak tightness .25
6.2.5 Heat resistance.25
6.2.6 Connections.25
6.2.7 Resistance to vibration.29
6.2.8 Resistance to impact .31
6.2.9 Resistance to mishandling.33
6.3 Corrosion protection.34
6.3.1 General .34
6.3.2 Protection against external corrosion for material which is not corrosion resistant.34
6.3.3 Protection against external corrosion for corrosion resistant material.36
6.3.4 Protection against internal corrosion for material which is not corrosion resistant.37
6.3.5 Protection against internal corrosion for corrosion resistant material.39
6.4 Casework decorative finish.39
6.4.1 Scratch test.39
6.4.2 Humidity.40
6.5 Ageing of non-metallic casework.40
6.5.1 Requirements .40
6.5.2 Test .40
6.6 Ageing of external surfaces of the meter, including index windows and adhesion
of the index window.40
6.6.1 Requirements .40
6.6.2 Test .41
6.7 Protection against solar radiation.41
6.7.1 Requirements .41
6.7.2 Test .41
6.8 Resistance to external relative humidity .41
6.8.1 Requirements .41
6.8.2 Test .41
6.9 Flame retardance of external surfaces .42
6.9.1 Requirements .42
6.9.2 Test .42
6.10 Resistance to storage temperature range .42
6.10.1 Requirement .42
6.10.2 Test .42
6.11 Resistance to the effects of toluene/iso-octane vapour .42
6.11.1 Requirements .42
6.11.2 Test .43
6.12 Resistance to water vapour .46
6.12.1 Requirements .46
6.12.2 Test .46
6.13 Ageing .48
6.13.1 Requirements .48
3
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ENV 14236:2002 (E)
6.13.2 Test .48
7 Optional features.48
7.1 Pressure measuring point.48
7.1.1 Requirements .48
7.1.2 Test .48
7.2 Resistance to high ambient temperature.49
7.2.1 Requirements .49
7.2.2 Test .49
7.2.3 Meter fitted with a thermal shut-off valve .51
7.3 Meters with temperature conversion .51
7.4 Ancillary devices.51
7.5 Use in hazardous zones .51
8 Index .51
8.1 Recording and storage .51
8.1.1 Requirement .51
8.1.2 Test .51
8.2 Display.51
8.2.1 Requirement .51
8.2.2 Test .52
8.3 Segmental display.52
8.3.1 Requirements .52
8.3.2 Test .52
8.4 Non-volatile memory.52
8.4.1 Requirements .52
8.4.2 Test .52
9 Marking.53
9.1 All meters .53
9.2 Two-pipe meters.53
9.3 Durability and legibility of marking .53
9.3.1 Requirements .53
9.3.2 Ultraviolet exposure test .54
9.3.3 Indelibility test .54
10 Software .54
10.1 Requirements .54
10.2 Test .54
11 Communications .54
11.1 General .54
11.2 Character transmission .55
11.3 Communications protocol.55
11.3.1 Wakeup.55
11.3.2 Sign-off.57
11.3.3 Security .57
11.3.4 Time-outs .57
11.4 Data.57
11.4.1 General .57
11.4.2 Data read-out mode.57
11.4.3 Data identifiers .57
11.4.4 Data set structure.58
11.5 Test-mode .58
11.5.1 General .58
11.5.2 Test-mode commands .58
11.5.3 Response of meter to test commands.59
11.6 Optical port .60
11.7 Galvanic port (optional).60
11.8 Diagnostics .60
11.8.1 General .60
11.8.2 Displayed flags.61
4
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ENV 14236:2002 (E)
12 Battery .62
12.1 General .62
12.2 Voltage interruptions .62
12.2.1 Requirements .62
12.2.2 Test .62
12.3 Minimum operating voltage .62
12.3.1 Requirements .62
12.3.2 Test .62
12.4 Battery life.62
13 Immunity to electromagnetic disturbances.63
13.1 General .63
13.2 Electrostatic discharge.63
13.2.1 Requirements .63
13.2.2 Test .63
13.3 Radio frequency electromagnetic field.63
13.3.1 Requirements .63
13.3.2 Test .63
13.4 Electromagnetic induction (power frequency).64
13.4.1 Requirements .64
13.4.2 Test .64
13.5 Electromagnetic induction (pulsed field) .64
13.5.1 Requirements .64
13.5.2 Test .65
13.6 Radio interference suppression .65
13.6.1 Requirements .65
13.6.2 Test .65
14 Ultrasonic (acoustic) noise interference.65
14.1 Requirements .65
14.2 Test .65
14.2.1 Test sequence .65
14.2.2 White noise test.65
14.2.3 Scanning frequency test .66
15 Meters supplied for testing .
...
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