EN 14236:2007

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Ultrasonic domestic gas metersCompteurs de gaz domestiques a ultrasonsUltraschall-HaushaltsgaszählerTa slovenski standard je istoveten z:EN 14236:2007SIST EN 14236:2007en,fr,de91.140.40Sistemi za oskrbo s plinomGas supply systemsICS:SIST ENV 14236:20041DGRPHãþDSLOVENSKI
STANDARDSIST EN 14236:200701-september-2007

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14236January 2007ICS 91.140.40Supersedes ENV 14236:2002
English VersionUltrasonic domestic gas metersCompteurs de gaz domestiques à ultrasonsUltraschall-HaushaltsgaszählerThis European Standard was approved by CEN on 13 December 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14236:2007: E

Test gases.69 A.1 General.69 A.2 Test gas properties.69 Annex B (normative)
Production requirements for gas meters.70 B.1 Specification.70 B.2 Technical requirements.70 B.3 Certificates of conformity.70 Annex C (normative)
Meters with gas temperature conversion devices.72 C.1 Scope.72 C.2 Metrological performance.72 C.2.1 Errors of indication.72 C.2.2 Error of indication where the temperature of the gas at the meter inlet is significantly different from the ambient temperature of the air surrounding the meter.75 C.2.3 Temperature sensitivity.77

1) 1 bar = 1 000 mbar = 105 Pa.

— List of test methods (IEC 60707:1999) EN 60730-1:2000, Automatic electrical controls for household and similar use — Part 1: General requirements (IEC 60730-1:1999, modified) EN 61000-4-2, Electromagnetic compatibility (EMC) — Part 4: Testing and measurement techniques — Section 2: Electrostatic discharge immunity test — Basic EMC publication
(IEC 61000-4-2:1995) EN 61000-4-3, Electromagnetic compatibility (EMC) — Part 4-3: Testing and measurement techniques — Radiated, radio frequency, electromagnetic field immunity test — (IEC 61000-4-3:2006) EN 61000-4-8, Electromagnetic compatibility (EMC) — Part 4: Testing and measurement techniques — Section 8: Power frequency magnetic field immunity test — Basic EMC publication
(IEC 61000-4-8:1993) EN 61000-4-9, Electromagnetic compatibility (EMC) — Part 4: Testing and measurement techniques — Section 9: Pulse magnetic field immunity test — Basic EMC publication (IEC 61000-4-9:1993) EN
61000-6-1, Electromagnetic compatibility (EMC) — Part 6-1: Generic standards — Immunity for residential, commercial and light-industrial environments EN 61000-6-2, Electromagnetic compatibility (EMC) — Part 6-2: Generic standards – Immunity for industrial environments (IEC 61006-2-2:2005) EN 62056-21:2002, Electricity metering — Data exchange for meter reading, tariff and load control — Part 21: Direct local data exchange (IEC 62056-21:2002) EN ISO 2409, Paints and varnishes — Cross-cut test (ISO 2409:1992) EN ISO 2812-1:1994, Paints and varnishes — Determination of resistance to liquids —
Part 1: General methods (ISO 2812-1:1993) EN ISO 4628-2:2003, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size of defects, and of intensity of uniform changes in appearance — Part 2: Assessment of degree of blistering (ISO 4628-2:2003)

Part 1: Falling-weight test, large-area indenter (ISO 6272-1:2002) EN ISO 9001, Quality management systems — Requirements (ISO 9001:2000) EN ISO 9227, Corrosion tests in artificial atmospheres – Salt spray tests (ISO 9227:2006) ISO 834-1, Fire resistance tests — Elements of building construction — Part 1: General requirements ISO 1518, Paints and varnishes — Scratch test ISO 7724-3, Paints and varnishes — Colorimetry — Part 3: Calculation of colour differences ASTM D471, Standard Test Method for Rubber Property — Effect of Liquids ASTM D1003, Standard Test Method for Haze and Luminous Transmittance of Transparent Plastics 3 Terms, definitions and symbols 3.1 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. 3.1.1 actual flow rate flow rate at the gas pressure and gas temperature conditions prevailing in the gas distribution line in which the meter is fitted, at the meter inlet 3.1.2 base conditions fixed conditions to which a volume of gas is converted (i.e. base gas temperature 15 °C, base gas pressure 1 013,25 mbar) 3.1.3 contaminants gas borne dust, vapour and other substances that could affect the operation of the meter 3.1.4 communications port galvanic or optical serial data port 3.1.5 display device (e.g. liquid crystal display) which shows the contents of a memory (e.g. registered volume or flags)

is the indicated volume in cubic metres (m3); Vc
is the volume in cubic metres (m3) that has actually flowed through the meter 3.1.8 external leak tightness leak tightness of the gas carrying components of the gas meter with respect to the atmosphere 3.1.9 flag single alphabetic character on the index giving a visual signal of significant events and/or change(s) in the operation of the meter 3.1.10 galvanic connection/interface hard wired serial connection or pulse output from the meter 3.1.11 index all that which is viewed through the index window, including the display 3.1.12 index window(s) area(s) of transparent material through which the index can be read 3.1.13 maximum error shift maximum mean error shift at any of the tested flow rates 3.1.14 maximum working pressure upper limit of the working pressure for which the meter has been designed, as declared by the manufacturer and marked on the index or the data plate 3.1.15 mean error arithmetic mean of consecutive errors of indication at a flow rate 3.1.16 measuring element part of the meter which produces an electrical signal proportional to the gas flow rate

class to which a meter belongs, according to the metrological requirements of this European Standard, i.e. class 1,5 or class 1,0. 3.1.20 meter cover rigid enclosure on the front of the meter made either wholly of transparent material, or of opaque material provided with index window(s) 3.1.21 normal conditions of operation conditions referring to the meter operating:  at a pressure up to the maximum working pressure (with or without a flow of gas);  within the range of flow rates;  within the ambient temperature range;  within the gas temperature range;  with the distributed gas 3.1.22 operating mode method (sample frequency and timing) of obtaining volume flow measurements 3.1.23 optical port serial data port using an infra-red transmitter and receiver 3.1.24 pressure absorption difference between the pressure measured at the inlet and outlet connections of the meter whilst the meter is operating 3.1.25 pressure measuring point permanent fitting on the meter outlet enabling a direct measurement of the outlet pressure to be obtained 3.1.26 range of mean errors difference between the minimum and maximum mean errors over a specified flow range 3.1.27 regression line straight line, generated using a statistical method, to give a graphical representation of a set of results
...