EN 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.
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 3.1.20.1 and 3.1.20.2.
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).
Dieses Dokument 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, wie jeweils zutreffend, 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
Ta dokument določa zahteve in preskuse za konstrukcijo, delovanje, varnost ter skladnost elektronskih korektorjev prostornine plina, povezanih s plinomeri, ki se uporabljajo za merjenje prostornine gorivnih plinov iz 1. in 2. skupine v skladu s standardom EN 437.
Ta dokument je namenjen za tipsko preskušanje, katerega podrobne ustrezne določbe so podane v dodatku A.
V tem dokumentu so obravnavane samo tri vrste pretvorbe:
– pretvorba kot funkcija samo temperature (imenovana T-pretvorba);
– pretvorba kot funkcija tlaka in temperature s konstantnim kompresijskim faktorjem (imenovana PT-pretvorba);
– pretvorba kot funkcija tlaka, temperature in ob upoštevanju faktorja kompresije (imenovana PTZ-pretvorba).
Ta dokument ni pomemben za korekcijo temperature, integrirano v plinomere, ki prikazujejo samo pretvorjen volumen.
EN 12405-2 se uporablja za pretvorbo energije.
Naprave za volumsko korekcijo plina so sestavljene iz kalkulatorja in temperaturnega pretvornika ali kalkulatorja, temperaturnega pretvornika in tlačnega pretvornika, ki so nameščeni lokalno.
Za namen uporabe tega dokumenta se lahko korektor, po izbiri proizvajalca, obravnava kot celoten instrument (tip 1) ali izdelan iz ločenih elementov (tip 2), v skladu z opredelitvami v točkah 3.1.18.1 in 3.1.18.2.
V tem zadnjem primeru so določbe glede tlačnih pretvornikov, temperaturnih senzorjev in temperaturnih pretvornikov podane v dodatkih B, C in D.
Vsak korektor omogoča popravek krivulje napake za plinomer.
OPOMBA: Pri pripravi računa končnemu uporabniku je mogoče odčitke iz korektorja uporabiti v povezavi z odčitki plinomera v skladu s standardi EN 1359, EN 12480 ali EN 12261, kot je primerno, ali s katerim koli drugim ustreznim in veljavnim mednarodnim oz. nacionalnim standardom za plinomere, brez poseganja v nacionalne predpise.
General Information
Relations
Overview
EN 12405-1:2021 - "Gas meters - Conversion devices - Part 1: Volume conversion" defines requirements and test methods for electronic gas-volume conversion devices used with gas meters. The standard covers construction, performance, safety and conformity for devices that convert measured gas volumes of the 1st and 2nd fuel gas families (per EN 437) to reference conditions. It is intended primarily for type testing (details in Annex A) and applies to standalone conversion devices and locally installed sensor-plus-calculator assemblies.
Key topics and technical requirements
- Scope of conversion methods
- T conversion: correction as a function of temperature only.
- PT conversion: correction as a function of pressure and temperature with a constant compression factor.
- PTZ conversion: correction as a function of pressure, temperature and the gas compression factor (non‑ideal gas behavior).
- Device architecture
- Conversion devices consist of a calculator and a temperature transducer, or a calculator plus temperature and pressure transducer locally installed.
- Manufacturer may supply a conversion device as Type 1 (complete instrument) or Type 2 (separate elements); Annexes B, C and D address pressure transducers, temperature sensors and transducers.
- Performance and accuracy
- Rated operating conditions, maximum permissible errors, repeatability, durability and reliability requirements are specified.
- Provisions for error curve correction of a gas meter are included.
- Construction and installation
- Requirements for casings, indications, inputs, battery power operation, alarms, and environmental classes (mechanical and electromagnetic) are detailed.
- Testing and conformity
- Type test procedures (Annex A) cover reference-condition accuracy, ambient influences, humidity, power disturbances, electrical immunity, durability and matching of Type 2 elements.
- Marking and documentation
- Rules for marking, installation and operating instructions are specified to ensure safe and compliant field deployment.
Applications - who uses this standard
- Manufacturers of gas-volume conversion devices and meter integrators validating product design and compliance.
- Gas utilities and metering service providers specifying equipment for billing and custody transfer.
- Test laboratories and conformity assessment bodies performing type testing and certification.
- Regulators and system designers establishing metering accuracy, installation and safety requirements for fuel gas distribution.
Related standards
- EN 437 (gas families and test gases)
- EN 1359, EN 12480, EN 12261 (gas meter standards referenced for combined use)
- ICS classification: 91.140.40 (Gas supply systems)
Keywords: EN 12405-1:2021, gas meters, conversion devices, volume conversion, T conversion, PT conversion, PTZ conversion, type testing, pressure transducer, temperature transducer, gas metering.
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2022
Nadomešča:
SIST EN 12405-1:2018
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: EN 12405-1:2021
ICS:
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 12405-1
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2021
EUROPÄISCHE NORM
ICS 91.140.40 Supersedes 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 volume
This European Standard was approved by CEN on 18 July 2021.
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. 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 CEN
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 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12405-1:2021 E
worldwide for CEN national Members.
Contents Page
European foreword .16
1 Scope .18
2 Normative references .18
3 Terms, definitions and symbols .21
3.1 Terms and definitions .21
3.2 Symbols .25
3.3 Classification .27
3.3.1 Mechanical classes .27
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 .27
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 .28
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 .29
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
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 . 50
A.2.1 Objective . 50
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
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 .51
A.4.3 Procedure.51
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 .52
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 .53
A.7.3 Procedure.53
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 .54
A.9.3 Procedure.54
A.9.4 Acceptance criteria .55
A.10 Electrostatic discharges .55
A.10.1 Objective .55
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) . 55
A.11.1 Objective . 55
A.11.2 Reference to documents . 55
A.11.3 Procedure . 55
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 . 56
A.13.1 Objective . 56
A.13.2 Reference to documents . 56
A.13.3 Procedure . 56
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 . 57
A.15 Durability . 57
A.15.1 Objective . 57
A.15.2 Reference to documents . 57
A.15.3 Procedure . 58
A.15.4 Acceptance criteria . 58
A.16 Alarms operation . 58
A.16.1 Objective . 58
A.16.2 Reference to documents . 58
A.16.3 Procedure . 58
A.16.4 Acceptance criteria . 58
A.17 Repeatability . 59
A.17.1 Objective . 59
A.17.2 Reference to standards . 59
A.17.3 Procedure.59
A.17.4 Acceptance criteria .59
A.18 Short time DC power variations .59
A.18.1 Objective .59
A.18.2 Reference to standards .59
A.18.3 Procedure.59
A.18.4 Acceptance criteria .59
A.19 Surges on supply lines and/or signal lines .60
A.19.1 Objective .60
A.19.2 Reference to standards .60
A.19.3 Procedure.60
A.19.4 Acceptance criteria .60
A.20 Power frequency magnetic field .60
A.20.1 Objective .60
A.20.2 Reference to standards .60
A.20.3 Procedure.60
A.20.4 Acceptance criteria .60
A.21 Functionality “Error curve correction” of a gas meter (optional) .61
A.21.1 Objective .61
A.21.2 Reference to documents .61
A.21.3 Procedure.61
A.21.4 Acceptance criteria .61
Annex B (normative) Pressure transducers .62
B.1 Scope .62
B.2 Rated operating conditions .62
B.2.1 Specified measurement range for pressure .62
B.2.2 Environmental class .62
B.2.3 Power supply .62
B.3 Construction requirements .62
B.3.1 General .62
B.3.2 Casings .62
B.3.3 Indications .62
B.3.3.1 General .62
B.3.3.2 Electronic indicating device .63
B.4 Performances .63
B.4.1 Reference conditions .63
B.4.2 Rated operating conditions. 63
B.4.3 Maximum permissible errors . 63
B.4.4 Influence factors . 63
B.4.5 Disturbances. 63
B.4.6 Durability . 63
B.5 Tests of conformity . 64
B.5.1 Test conditions . 64
B.5.2 Tests . 64
B.5.3 Sample of pressure transducers required for testing . 64
B.6 Marking . 64
Annex C (normative) Platinum resistance thermometer sensors . 65
C.1 Scope . 65
C.2 Operating rated conditions . 65
C.2.1 Specified measurement range for temperature . 65
C.2.2 Environmental class . 65
C.3 Construction requirements . 65
C.4 Performances . 65
C.5 Marking . 66
C.5.1 Required markings . 66
C.5.2 Verification mark . 66
C.6 Metrological verifications . 66
C.6.1 Type approval . 66
C.6.2 Initial verification . 66
C.7 Verification procedure . 67
C.7.1 Visual inspection . 67
C.7.2 Type testing (type approval) . 67
C.7.3 Samples of PRT required for testing . 67
C.7.4 Initial verification . 67
Annex D (normative) Temperature transducers . 69
D.1 Scope . 69
D.2 Rated operating conditions. 69
D.2.1 Specified measurement range for temperature . 69
D.2.2 Environmental class . 69
D.2.3 Power supply . 69
D.3 Construction requirements . 69
D.3.1 General . 69
D.3.2 Casings .69
D.3.3 Indications .69
D.3.3.1 General .69
D.3.3.2 Electronic indicating device .70
D.4 Performances .70
D.4.1 Reference conditions .70
D.4.2 Rated operating conditions .70
D.4.3 Maximum permissible errors .70
D.4.4 Influence factors .70
D.4.5 Disturbances .70
D.4.6 Durability .70
D.5 Tests of conformity .71
D.5.1 Test conditions .71
D.5.2 Tests .71
D.5.3 Sample of temperature transducers required for testing .71
D.6 Marking .71
Annex E (informative) Model type test report for conversion devices .72
E.1 General .72
E.1.1 General remarks .72
E.1.2 Number of pages .72
E.1.3 Laboratory's identification .72
E.1.4 Applicant .72
E.1.5 Identification of device(s) submitted for testing .72
E.2 Accuracy tests under reference conditions .72
E.2.1 Ambient temperature during the test .72
E.2.2 Test equipment used.73
E.2.3 Test results .73
E.3 Ambient temperature .74
E.3.1 Effect of dry heat .74
E.3.1.1 Ambient temperature during the test .74
E.3.1.2 Test equipment used.74
E.3.1.3 Test results .
...
Frequently Asked Questions
EN 12405-1:2021 is a standard published by the European Committee for Standardization (CEN). Its full title is "Gas meters - Conversion devices - Part 1: Volume conversion". This standard covers: 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. 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 3.1.20.1 and 3.1.20.2. 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.
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. 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 3.1.20.1 and 3.1.20.2. 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.
EN 12405-1:2021 is classified under the following ICS (International Classification for Standards) categories: 91.140.40 - Gas supply systems. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 12405-1:2021 has the following relationships with other standards: It is inter standard links to EN 12405-1:2018. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 12405-1:2021 is associated with the following European legislation: EU Directives/Regulations: 2014/32/EU; Standardization Mandates: M/374, M/541. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
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The article discusses the requirements and tests outlined in the EN 12405-1:2021 standard for gas-volume electronic conversion devices used in conjunction with gas meters to measure fuel gas volumes. The standard specifies three types of conversion: temperature only (T conversion), pressure and temperature with constant compression factor (PT conversion), and pressure, temperature, and compression factor (PTZ conversion). The document does not cover temperature conversion integrated into gas meters. Gas-volume conversion devices can be a complete instrument or made of separate elements, and provisions for pressure transducers, temperature sensors, and temperature transducers are given in annexes. Additionally, the conversion devices can provide error curve correction for gas meters. The readings from the conversion device can be used alongside readings from a gas meter conforming to relevant international or national standards or regulations when providing an account to end users.
記事タイトル：EN 12405-1:2021 - ガスメーター - 変換デバイス - 第1部：容積変換 記事内容：この文書は、ガスメーターに関連するガス容積電子変換デバイスの構造、性能、安全性、適合性の要件および試験方法を指定しています。この変換デバイスは、EN 437に基づいて1次および2次燃料ガスの体積を測定するために使用されます。 この文書はタイプテストを目的としており、関連する規定については付録Aに詳細に記載されています。 この文書では、次の3種類の変換のみを取り扱っています： - 温度のみに関連する変換（T変換と呼ばれる） - 圧力と温度に関連する定数圧縮因子の変換（PT変換と呼ばれる） - 圧力、温度、および圧縮因子を考慮した変換（PTZ変換と呼ばれる） この文書は、ガスメーターに統合された温度変換には関係ありません。ガス容積変換デバイスは、計算機と温度変換器、または計算機と温度変換器、および現地設置用の圧力変換器などで構成されています。 この文書の適用にあたって、変換デバイスは製造業者の選択により完全な装置（タイプ1）と見なされるか、独立した要素から構成される（タイプ2）ことができます。それぞれの定義は付録B、C、およびDに記載されています。 任意の変換デバイスは、ガスメーターの誤差曲線補正を提供できます。 注：サービス請求時には、EN 1359、EN 12480、またはEN 12261に準拠したガスメーターの読み取り値と、関連する国際的または国内規格、または規制に準拠した変換デバイスの読み取り値を併用して、エンドユーザーに対してアカウントを提示することができます。
기사 제목: EN 12405-1: 2021 - 가스 미터 - 변환 장치 - 제 1 부: 부피 변환 기사 내용: 이 문서는 가스 미터와 관련된 가스 부피 전자 변환 장치의 구성, 성능, 안전성 및 일치 요건 및 시험을 규정합니다. 이 변환 장치는 EN 437에 따라 1순위 및 2순위 가연성 가스의 부피를 측정하는 데 사용됩니다. 이 문서는 유형 시험을 위한 것이며, 관련 규정은 부록 A에 상세히 나와 있습니다. 이 문서에서는 다음 세 가지 유형의 변환만 다룹니다: - 온도에 따른 변환 (T 변환이라고 함) - 압력과 온도에 따른 변환 (압력 변환 업체 및 온도 변환 업체를 포함한 PT 변환) - 압력, 온도 및 압축 계수를 고려한 변환 (PTZ 변환) 이 문서는 가스 미터에 통합된 온도 변환에는 적용되지 않습니다. 이러한 가스 부피 변환 장치는 계산기와 온도 변환기 또는 계산기, 온도 변환기, 현장 설치용 압력 변환기 등으로 구성됩니다. 이 문서의 적용을 위해, 제조업체의 선택에 따라 변환 장치는 완전한 기기 (유형 1)로 간주되거나 별도의 요소로 구성될 수 있으며, 이에 대한 정의는 3.1.20.1 및 3.1.20.2에서 제공됩니다. 이 경우 압력 변환기, 온도 센서 및 온도 변환기에 관한 규정이 각각 부록 B, C 및 D에 제공됩니다. 어떤 변환 장치도 가스 미터의 오차 곡선 보정을 제공할 수 있습니다. 참고: 가스 미터 (EN1359, EN 12480 또는 EN 12261에 해당하는 가스 미터 또는 관련 국제 또는 국가 표준에 따른)의 측정값과 함께 변환 장치의 측정값을 종합하여 최종 사용자에게 서비스 요금을 계산할 때, 국가 규정을 침해하지 않는 범위 내에서 사용할 수 있습니다.
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