kSIST FprEN 12405-1:2021
(Main)Gas meters - Conversion devices - Part 1: Volume conversion
Gas meters - Conversion devices - Part 1: Volume conversion
This document specifies the requirements and tests for the construction, performance, safety and conformity of gas volume electronic conversion devices associated to gas meters, used to measure volumes of fuel gases of the 1st and 2nd families according to EN 437.
This document is intended for type testing, the detailed relevant provisions of which are given in Annex A.
Only three kinds of conversion are treated in this document:
- conversion as a function of temperature only (called T conversion);
- conversion as a function of the pressure and of the temperature with constant compression factor (called PT conversion);
- conversion as a function of the pressure, the temperature and taking into account the compression factor (called PTZ conversion).
This document is not relevant to temperature conversion integrated into gas meters which only indicate the converted volume.
EN 12405-2 applies for energy conversion.
Gas-volume conversion devices consist of a calculator and a temperature transducer or a calculator, a temperature transducer and a pressure transducer locally installed.
For application of this document, a conversion device may be, as a choice of the manufacturer, considered as a complete instrument (Type 1) or made of separate elements (Type 2), according to the definitions given in 3.1.18.1 and 3.1.18.2.
In this last case, the provisions concerning pressure transducers, temperature sensors and temperature transducers are given in Annexes B, C and D respectively.
Any conversion device can provide an error curve correction for a gas meter.
NOTE When rendering an account to an end user the readings from the conversion device can be used in conjunction with the readings from a gas meter conforming to EN 1359, EN 12480, or EN 12261, as appropriate, or to any other appropriate and relevant international or national standard for gas meters, without prejudice of national regulations.
Gaszähler - Umwerter - Teil 1: Volumenumwertung
Dieses Dokument legt die Anforderungen an Herstellung, Leistungsumfang, Sicherheit und Konformität elektronischer, am Gaszähler angeschlossener Zustands-Mengenumwerter, die für die Mengenmessung von Brenngasen der ersten und zweiten Gasfamilie nach EN 437 eingesetzt werden, sowie deren Prüfung fest.
Dieses Dokument ist für die Bauartprüfung vorgesehen, deren relevante Bestimmungen im Einzelnen in Anhang A angegeben sind.
In diesem Dokument werden nur drei Arten der Umwertung behandelt:
- die Umwertung als reine Temperaturfunktion (T-Umwertung);
- die Umwertung als Funktion von Druck und Temperatur mit einem konstanten Realgasfaktor (PT-Umwertung);
- die Umwertung als Funktion von Druck, Temperatur und Realgasfaktor (PTZ-Umwertung).
Diese Europäische Norm gilt nicht für eine in einen Gaszähler integrierte Temperaturumwertung, wenn der Gaszähler lediglich das umgewertete Volumen anzeigt.
Zustands-Mengenumwerter bestehen aus einem Rechner und einem Temperaturaufnehmer oder aus einem Rechner, einem Temperaturaufnehmer und einem Druckaufnehmer, die in der Messanlage installiert sind.
Für die Anwendung dieses Dokuments kann ein Umwerter in Übereinstimmung mit den Definitionen 3.1.20.1 und 3.1.20.2 und je nach Hersteller ein Kompaktzustands-Mengenumwerter (vollständiges Gerät, Typ 1) sein oder aus getrennten Elementen bestehen (Typ 2).
Im letztgenannten Fall sind die Bestimmungen zu Druckaufnehmern, Temperaturmessfühlern und Temperaturaufnehmern in den Anhängen B, C bzw. D enthalten.
Alle Umwerter können auch Einrichtungen zur Korrektur der Fehlerkurve des Gaszählers enthalten.
ANMERKUNG Unbeschadet nationaler Regelungen können die Zählerstandsablesungen vom Umwerter in Verbindung mit den Zählerstandsablesungen von Gaszählern, die EN 1359, EN 12480 bzw. EN 12261 oder anderen zutreffenden und relevanten internationalen oder nationalen Normen für Gaszähler entsprechen, für die Rechnungsstellung an Endverbraucher genutzt werden.
Compteurs de gaz - Dispositifs de conversion - Partie 1 : Conversion de volume
Le présent document définit des exigences et des essais pour la fabrication, les performances, la sécurité et la conformité des dispositifs électroniques de conversion de volume de gaz, associés à des compteurs de gaz et utilisés pour mesurer des volumes de gaz combustibles de première et deuxième famille, telles que définies dans l’EN 437.
Le présent document est destiné aux essais de type, pour lesquels les détails sont fournis à l’Annexe A.
Le présent document traite uniquement des trois types de conversion suivants :
- conversion en fonction de la température seule (appelée « conversion T ») ;
- conversion en fonction de la pression et de la température avec un facteur de compressibilité constant (appelée « conversion PT ») ;
- conversion en fonction de la pression, de la température et avec prise en compte du facteur de compressibilité (appelée « conversion PTZ »).
Le présent document ne s’applique pas à la conversion en fonction de la température intégrée aux compteurs à gaz qui n’affichent que le volume converti.
L’EN 12405 2 s’applique pour la conversion d’énergie.
Les dispositifs de conversion de volume de gaz sont constitués d’un calculateur et d’un transducteur de température, ou bien d’un calculateur, d’un transducteur de température et d’un transducteur de pression installé localement.
Pour l’application du présent document, le fabricant a le choix de considérer un dispositif de conversion en tant qu’instrument complet (Type 1) ou en tant qu’assemblage d’éléments séparés (Type 2), conformément aux définitions données en 3.1.20.1 et 3.1.20.2.
Dans le dernier cas, les données concernant les transducteurs de pression, les capteurs de température et les transducteurs de température sont respectivement fournies aux Annexes B, C et D.
Tout dispositif de conversion peut comporter une correction de la courbe d’erreur du compteur de gaz.
NOTE Lors de la présentation des relevés à l’utilisateur final, les mesurages issus du dispositif de conversion peuvent être utilisés conjointement avec les mesurages issus d’un compteur de gaz conforme à l’EN 1359, l’EN 12480 ou l’EN 12261 suivant le cas, ou à toute autre norme nationale ou internationale appropriée et applicable aux compteurs de gaz, dans le respect des réglementations nationales.
Plinomeri - Korektorji - 1. del: Volumska korekcija
General Information
RELATIONS
Standards Content (sample)
SLOVENSKI STANDARD
oSIST prEN 12405-1:2019
01-marec-2019
Plinomeri - Korektorji - 1. del: Volumska korekcija
Gas meters - Conversion devices - Part 1: Volume conversion
Gaszähler - Umwerter - Teil 1: Volumenumwertung
Compteurs de gaz - Dispositifs de conversion - Partie 1 : Conversion de volume
Ta slovenski standard je istoveten z: prEN 12405-1
ICS:
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
oSIST prEN 12405-1:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 12405-1:2019
DRAFT
EUROPEAN STANDARD
prEN 12405-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2019
ICS 91.140.40 Will supersede EN 12405-1:2018
English Version
Gas meters - Conversion devices - Part 1: Volume
conversion
Compteurs de gaz - Dispositifs de conversion - Partie 1 Gaszähler - Umwerter - Teil 1: Volumenumwertung
: Conversion de volumeThis draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 237.If this draft becomes a European Standard, CEN 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 CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and 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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12405-1:2019 E
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oSIST prEN 12405-1:2019
prEN 12405-1:2019 (E)
Contents Page
European foreword ............................................................................................................................................................. 16
1 Scope .......................................................................................................................................................................... 17
2 Normative references .......................................................................................................................................... 17
3 Terms, definitions and symbols ....................................................................................................................... 19
3.1 Terms and definitions ......................................................................................................................................... 19
3.2 Symbols ..................................................................................................................................................................... 24
3.3 Classification ........................................................................................................................................................... 26
3.3.1 Mechanical classes ................................................................................................................................................ 26
3.3.2 Electromagnetic environmental classes ....................................................................................................... 27
4 Principle of measurement ................................................................................................................................. 27
4.1 Conversion as a function of temperature ..................................................................................................... 27
4.2 Conversion as a function of pressure and temperature .......................................................................... 28
4.3 Conversion as a function of pressure, temperature and deviation from the ideal gas law ........ 28
4.4 Correction of the volume at measurement conditions ............................................................................ 29
5 Rated operating conditions ............................................................................................................................... 29
5.1 Specified field of measurement........................................................................................................................ 29
5.1.1 General ...................................................................................................................................................................... 29
5.1.2 Specified measurement range for gas pressure ......................................................................................... 29
5.1.3 Specified measurement range for gas temperature ................................................................................. 29
5.1.4 Gas characteristics ................................................................................................................................................ 30
5.1.5 Base conditions ...................................................................................................................................................... 30
5.2 Environmental conditions ................................................................................................................................. 30
5.2.1 Ambient temperature range ............................................................................................................................. 30
5.2.2 Humidity range ...................................................................................................................................................... 30
5.2.3 Mechanical environment .................................................................................................................................... 30
5.2.4 Electromagnetic environment .......................................................................................................................... 30
5.3 Power supply .......................................................................................................................................................... 30
6 Construction requirements ............................................................................................................................... 30
6.1 General ...................................................................................................................................................................... 30
6.2 Casings ...................................................................................................................................................................... 32
6.3 Indications ............................................................................................................................................................... 32
6.3.1 General ...................................................................................................................................................................... 32
6.3.2 Electronic indicating device .............................................................................................................................. 34
6.4 Inputs for volume conversion ........................................................................................................................... 34
6.5 Battery powered conversion device ............................................................................................................... 34
6.6 Security devices and alarms .............................................................................................................................. 35
7 Installation requirements .................................................................................................................................. 36
7.1 General ...................................................................................................................................................................... 36
7.2 Temperature transducer .................................................................................................................................... 37
7.3 Pressure transducer............................................................................................................................................. 37
8 Performance ........................................................................................................................................................... 37
8.1 Reference conditions ........................................................................................................................................... 37
8.2 Rated operating conditions ............................................................................................................................... 38
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8.3 Maximum permissible errors ........................................................................................................................... 38
8.3.1 General ...................................................................................................................................................................... 38
8.3.2 Error of conversion ............................................................................................................................................... 39
8.3.3 Specific errors for a gas-volume conversion device, type 2 ................................................................... 39
8.4 Conditions of matching the constituent elements of a conversion device type 2 .......................... 40
8.5 Influence factors .................................................................................................................................................... 40
8.6 Disturbances............................................................................................................................................................ 40
8.7 Durability ................................................................................................................................................................. 41
8.8 Repeatability ........................................................................................................................................................... 41
8.9 Reliability ................................................................................................................................................................. 41
9 Tests of conformity ............................................................................................................................................... 41
9.1 Verification of the construction requirements ........................................................................................... 41
9.2 Verification of the performance requirements (type tests)................................................................... 41
9.2.1 Test conditions ....................................................................................................................................................... 41
9.2.2 Samples of gas volume conversion device type 1 required for testing .............................................. 42
9.2.3 Samples of gas volume conversion devices type 2 required for testing ............................................ 46
9.2.4 Test report ............................................................................................................................................................... 46
10 Marking ..................................................................................................................................................................... 46
11 Installation and operating instructions ........................................................................................................ 47
Annex A (normative) Type test ........................................................................................................................................ 48
A.1 General conditions ................................................................................................................................................ 48
A.1.1 General ...................................................................................................................................................................... 48
A.1.2 Additional conditions specific to gas volume conversion devices type 1.......................................... 48
A.1.3 Additional conditions specific to gas-volume conversion devices type 2 ......................................... 48
A.1.4 Test procedures ..................................................................................................................................................... 49
A.1.4.1 Test procedure 1 (PR1) ....................................................................................................................................... 49
A.1.4.1.1 Test conditions ............................................................................................................................................... 49
A.1.4.1.2 Performance of the test ............................................................................................................................... 49
A.1.4.1.2.1 T conversion .............................................................................................................................................. 49
A.1.4.1.2.2 PT and PTZ conversion .......................................................................................................................... 49
A.1.4.2 Test procedure 2 (PR2) ....................................................................................................................................... 50
A.1.4.3 Test procedure 3 (PR3) ....................................................................................................................................... 50
A.1.4.4 Test procedure 4 (PR4) ....................................................................................................................................... 50
A.1.4.5 Test procedure 5 (PR5) ....................................................................................................................................... 50
A.1.5 Verification of the construction requirements ........................................................................................... 50
A.2 Accuracy tests under reference conditions .................................................................................................. 51
A.2.1 Objective ................................................................................................................................................................... 51
A.2.2 Reference to documents ...................................................................................................................................... 51
A.2.3 Procedure ................................................................................................................................................................. 51
A.2.4 Acceptance criteria ............................................................................................................................................... 51
A.3 Effect of ambient temperature .......................................................................................................................... 51
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A.3.1 Objective ................................................................................................................................................................... 51
A.3.2 Reference to documents ..................................................................................................................................... 51
A.3.3 Procedure................................................................................................................................................................. 51
A.3.4 Acceptance criteria ............................................................................................................................................... 51
A.4 Effect of damp heat, steady-state test ............................................................................................................ 51
A.4.1 Objective ................................................................................................................................................................... 51
A.4.2 Reference to documents ..................................................................................................................................... 52
A.4.3 Procedure................................................................................................................................................................. 52
A.4.4 Acceptance criteria ............................................................................................................................................... 52
A.5 Effect of damp heat, cyclic test .......................................................................................................................... 52
A.5.1 Objective ................................................................................................................................................................... 52
A.5.2 Reference to documents ..................................................................................................................................... 52
A.5.3 Procedure................................................................................................................................................................. 52
A.5.4 Acceptance criteria ............................................................................................................................................... 53
A.6 Electrical power variation ................................................................................................................................. 53
A.6.1 Objective ................................................................................................................................................................... 53
A.6.2 Reference to documents ..................................................................................................................................... 53
A.6.3 Procedure................................................................................................................................................................. 53
A.6.4 Acceptance criteria ............................................................................................................................................... 53
A.7 Short time power reductions ............................................................................................................................ 53
A.7.1 Objective ................................................................................................................................................................... 53
A.7.2 Reference to documents ..................................................................................................................................... 54
A.7.3 Procedure................................................................................................................................................................. 54
A.7.4 Acceptance criteria ............................................................................................................................................... 54
A.8 Electrical bursts ..................................................................................................................................................... 54
A.8.1 Objective ................................................................................................................................................................... 54
A.8.2 Reference to documents ..................................................................................................................................... 54
A.8.3 Procedure................................................................................................................................................................. 54
A.8.4 Acceptance criteria ............................................................................................................................................... 54
A.9 Electromagnetic susceptibility ......................................................................................................................... 54
A.9.1 Objective ................................................................................................................................................................... 54
A.9.2 Reference to documents ..................................................................................................................................... 55
A.9.3 Procedure................................................................................................................................................................. 55
A.9.4 Acceptance criteria ............................................................................................................................................... 55
A.10 Electrostatic discharges ...................................................................................................................................... 55
A.10.1 Objective ................................................................................................................................................................... 55
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A.10.2 Reference to documents ...................................................................................................................................... 55
A.10.3 Procedure ................................................................................................................................................................. 55
A.10.4 Acceptance criteria ............................................................................................................................................... 55
A.11 Overload of pressure (only for type 1 and pressure transducers) ...................................................... 56
A.11.1 Objective ................................................................................................................................................................... 56
A.11.2 Reference to documents ...................................................................................................................................... 56
A.11.3 Procedure ................................................................................................................................................................. 56
A.11.4 Acceptance criteria ............................................................................................................................................... 56
A.12 Effect of vibrations ................................................................................................................................................ 56
A.12.1 Objective ................................................................................................................................................................... 56
A.12.2 Reference to documents ...................................................................................................................................... 56
A.12.3 Procedure ................................................................................................................................................................. 56
A.12.4 Acceptance criteria ............................................................................................................................................... 56
A.13 Effect of shocks ....................................................................................................................................................... 57
A.13.1 Objective ................................................................................................................................................................... 57
A.13.2 Reference to documents ...................................................................................................................................... 57
A.13.3 Procedure ................................................................................................................................................................. 57
A.13.4 Acceptance criteria ............................................................................................................................................... 57
A.14 Overload of pressure (mechanical) ................................................................................................................ 57
A.14.1 Objective ................................................................................................................................................................... 57
A.14.2 Reference to documents ...................................................................................................................................... 57
A.14.3 Procedure ................................................................................................................................................................. 57
A.14.4 Acceptance criteria ............................................................................................................................................... 58
A.15 Durability ................................................................................................................................................................. 58
A.15.1 Objective ................................................................................................................................................................... 58
A.15.2 Reference to documents ...................................................................................................................................... 58
A.15.3 Procedure ................................................................................................................................................................. 58
A.15.4 Acceptance criteria ............................................................................................................................................... 58
A.16 Alarms operation ................................................................................................................................................... 59
A.16.1 Objective ................................................................................................................................................................... 59
A.16.2 Reference to documents ...................................................................................................................................... 59
A.16.3 Procedure ................................................................................................................................................................. 59
A.16.4 Acceptance criteria ............................................................................................................................................... 59
A.17 Repeatability ........................................................................................................................................................... 59
A.17.1 Objective ................................................................................................................................................................... 59
A.17.2 Reference to standards ........................................................................................................................................ 59
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A.17.3 Procedure............................................................................................................................................................
...
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