1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58The European Standard EN 14236:2007 has the status of a British StandardICS 91.140.40Ultrasonic dom
2、estic gas metersBRITISH STANDARDBS EN 14236:2007BS EN 14236:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 March 2007 BSI 2007ISBN 978 0 580 50395 5Amendments issued since publicationAmd. No. Date Commentscontract. Users are responsib
3、le for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard was published by BSI. It is the UK implementation of EN 14236:2007. It supersedes DD ENV 14236:2002 which is withdrawn.The UK participation in its pr
4、eparation was entrusted to Technical Committee GSE/25, Gas meters.A list of organizations represented on GSE/25 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14236January 20
5、07ICS 91.140.40 Supersedes ENV 14236:2002 English VersionUltrasonic domestic gas metersCompteurs de gaz domestiques ultrasons Ultraschall-HaushaltsgaszhlerThis European Standard was approved by CEN on 13 December 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which st
6、ipulate 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
7、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
8、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.EU
9、ROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14236:2007: EEN 14236:2007 (E
10、) 2 Contents Page Foreword7 1 Scope.8 2 Normative references 8 3 Terms, definitions and symbols .10 3.1 Terms and definitions10 3.2 Symbols 13 4 Normal operating conditions 14 4.1 Flow range 14 4.2 Maximum working pressure .15 4.3 Temperature range.15 4.4 Range of gases.16 4.4.1 Test gases.16 4.5 Or
11、ientation 16 5 Metrological performance .16 5.1 General16 5.2 Mode comparison 17 5.2.1 General17 5.2.2 Requirements .17 5.2.3 Test17 5.3 Permissible errors17 5.3.1 Requirements .17 5.3.2 Test17 5.4 Gas air relationship.18 5.4.1 General18 5.4.2 Requirements .18 5.4.3 Test19 5.5 Pressure absorption 19
12、 5.5.1 Requirements .19 5.5.2 Test19 5.6 Metrological stability .20 5.6.1 Requirements .20 5.6.2 Test20 5.7 Immunity to contaminants in gas stream20 5.7.1 Requirements .20 5.7.2 Test20 5.7.3 Specification of contamination dust22 5.8 Installation effects22 5.8.1 Requirements .22 5.8.2 Test22 5.9 Zero
13、 flow .22 5.9.1 Requirements .22 5.9.2 Test22 5.10 Reverse flow .23 5.10.1 Requirements .23 5.10.2 Test23 5.11 Low flow registration.23 5.11.1 Requirement .23 5.11.2 Test23 5.12 High flow registration 23 EN 14236:2007 (E) 3 5.12.1 Requirement .23 5.12.2 Test23 5.13 Pulsed (unsteady) flow23 5.13.1 Ge
14、neral23 5.13.2 Requirements .24 5.13.3 Test24 5.14 Temperature sensitivity.25 5.14.1 Requirements .25 5.14.2 Test25 6 Construction and materials 25 6.1 General25 6.2 Robustness of meter case 26 6.2.1 General26 6.2.2 Protection against penetration of dust and water 26 6.2.3 Resistance to internal pre
15、ssure .26 6.2.4 External leak tightness26 6.2.5 Heat resistance.27 6.2.6 Connections .27 6.2.7 Resistance to vibration30 6.2.8 Resistance to impact .32 6.2.9 Resistance to mishandling .34 6.3 Corrosion protection .35 6.3.1 General35 6.3.2 Protection against external corrosion for material which is n
16、ot corrosion resistant.35 6.3.3 Protection against external corrosion for corrosion resistant material.37 6.3.4 Protection against internal corrosion for material which is not corrosion resistant .38 6.3.5 Protection against internal corrosion for corrosion resistant material .40 6.4 Casework decora
17、tive finish 40 6.4.1 Scratch test.40 6.4.2 Humidity41 6.5 Ageing of non-metallic casework.41 6.5.1 Requirements .41 6.5.2 Test41 6.6 Ageing of external surfaces of the meter, including index windows and adhesion of the index window.41 6.6.1 Requirements .41 6.6.2 Test42 6.7 Protection against solar
18、radiation42 6.7.1 Requirements .42 6.7.2 Test42 6.8 Resistance to external humidity.42 6.8.1 Requirements .42 6.8.2 Test43 6.9 Flame retardance of external surfaces 43 6.9.1 Requirements .43 6.9.2 Test43 6.10 Resistance to storage temperature range.43 6.10.1 Requirement .43 6.10.2 Test43 6.11 Resist
19、ance to the effects of toluene/iso-octane vapour 44 6.11.1 Requirements .44 6.11.2 Test44 6.12 Resistance to water vapour 47 6.12.1 Requirements .47 6.12.2 Test47 6.13 Ageing .48 6.13.1 Requirements .48 6.13.2 Test49 EN 14236:2007 (E) 4 7 Optional features49 7.1 Pressure measuring point.49 7.1.1 Req
20、uirements .49 7.1.2 Test49 7.2 Resistance to high ambient temperature 49 7.2.1 Requirements .49 7.2.2 Test50 7.2.3 Meter fitted with a thermal shut-off valve51 7.3 Meters with temperature conversion .51 7.4 Ancillary devices (if fitted) 51 7.4.1 Requirement .51 7.4.2 Test52 7.5 Use in hazardous zone
21、s 52 8 Index52 8.1 Recording and storage52 8.1.1 Requirement .52 8.1.2 Test52 8.2 Display.52 8.2.1 Requirement .52 8.2.2 Test52 8.3 Segmental display53 8.3.1 Requirements .53 8.3.2 Test53 8.4 Non-volatile memory53 8.4.1 Requirements .53 8.4.2 Test53 8.5 Display reset.54 8.5.1 Requirements .54 8.5.2
22、Test54 9 Marking .54 9.1 All meters54 9.2 Two-pipe meters.55 9.2.1 Requirements .55 9.2.2 Test55 9.3 Durability and legibility of marking55 9.3.1 Requirements .55 9.3.2 Weathering55 9.3.3 Indelibility test 56 9.4 Accompanying information 56 10 Software 57 10.1 Requirements .57 10.2 Test57 11 Communi
23、cations 57 11.1 General57 11.2 Character transmission.58 11.3 Communications protocol.58 11.3.1 General58 11.3.2 Wakeup .58 11.3.3 Sign-off58 11.3.4 Security .58 11.3.5 Time-outs 58 11.4 Data58 11.4.1 General58 11.4.2 Data read-out mode .59 11.5 Test-mode .59 11.5.1 General59 11.5.2 Test-mode comman
24、ds.59 EN 14236:2007 (E) 5 11.5.3 Response of meter to test commands.59 11.6 Data optical port.61 11.7 Galvanic port (optional).61 11.8 Diagnostics.61 11.8.1 General61 11.8.2 Displayed flags.61 12 Battery.62 12.1 General62 12.2 Voltage interruptions.62 12.2.1 Requirements .62 12.2.2 Test62 12.3 Minim
25、um operating voltage 63 12.3.1 Requirements .63 12.3.2 Test63 12.4 Battery life.63 12.4.1 Requirements .63 12.4.2 Test63 13 Immunity to electromagnetic disturbances.63 13.1 General63 13.2 Electrostatic discharge63 13.2.1 Requirements .63 13.2.2 Test63 13.3 Radio frequency electromagnetic field64 13.
26、3.1 Requirements .64 13.3.2 Test64 13.4 Electromagnetic induction (power frequency) .64 13.4.1 Requirements .64 13.4.2 Test65 13.5 Electromagnetic induction (pulsed field) 65 13.5.1 Requirements .65 13.5.2 Test65 13.6 Radio interference suppression .65 13.6.1 Requirements .65 13.6.2 Test65 14 Ultras
27、onic (acoustic) noise interference .65 14.1 Requirements .65 14.2 Test66 14.2.1 Test sequence 66 14.2.2 White noise test66 14.2.3 Scanning frequency test .66 15 Meters supplied for testing .67 Annex A (informative) Test gases69 A.1 General69 A.2 Test gas properties69 Annex B (normative) Production r
28、equirements for gas meters .70 B.1 Specification.70 B.2 Technical requirements.70 B.3 Certificates of conformity70 Annex C (normative) Meters with gas temperature conversion devices.72 C.1 Scope.72 C.2 Metrological performance .72 C.2.1 Errors of indication72 C.2.2 Error of indication where the temp
29、erature of the gas at the meter inlet is significantly different from the ambient temperature of the air surrounding the meter75 C.2.3 Temperature sensitivity.77 EN 14236:2007 (E) 6 C.2.4 Temperature converted volume .77 Annex ZA (informative) 78 Bibliography 82 EN 14236:2007 (E) 7 Foreword This doc
30、ument (EN 14236:2007) has been prepared by Technical Committee CEN/TC 237 “Gas meters”, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2007, and conf
31、licting national standards shall be withdrawn at the latest by July 2007 This document supersedes ENV 14236:2002. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive 2004/
32、22/EC. For relationship with EU Directive 2004/22/EC, see informative Annex ZA, which is an integral part of this document. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgi
33、um, 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. EN 14236:2007 (E) 8 1 S
34、cope This European Standard specifies requirements and tests for the construction, performance and safety of class 1,0 and class 1,5 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
35、 fuel gases of the second and/or third family, as given in EN 437, at maximum working pressures not exceeding 0,5 bar1)and maximum actual flow rates of up to 10 m3/h over a minimum ambient temperature range of -10 C to +40 C, and minimum gas temperature span of 40 K, for domestic applications. This
36、European Standard applies to meters where the measuring element and the register(s) are enclosed in the same case. This European Standard applies to meters with and without built-in temperature conversion, that are installed in locations with vibration and shocks of low significance and in closed lo
37、cations (indoor or outdoor with protection as specified by the manufacturer) with condensing or with non-condensing humidity or, if specified by the manufacturer, open locations (outdoor without any covering) with condensing humidity or with non-condensing humidity and in locations with electromagne
38、tic disturbances. Unless otherwise stated, all pressures given in this European Standard are gauge pressures. When more than one meter type is submitted for testing, then each meter type is required to be tested against this European Standard. Clauses 1 to 15 and Annex C are for design and type test
39、ing only. NOTE See Annex A for production requirements. 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 (inclu
40、ding any amendments) applies. EN 55022, Information technology equipment Radio disturbance characteristics Limits and methods of measurement (CISPR 22:1997, modified) EN 60068-2-5, Environmental testing Part 2: Tests Test Sa: Simulated solar radiation at ground level (IEC 60068-2-5:1975) EN 60068-2-
41、30, Environmental testing Part 2-30: Tests Test Db: Damp heat, cyclic (12 + 12 h cycle) (IEC 60068-2-30:2005) EN 60079-0:2004, Electrical apparatus for explosive gas atmospheres Part 0: General requirements (IEC 60079-0:2004, modified) 1)1 bar = 1 000 mbar = 105Pa.EN 14236:2007 (E) 9 EN 60079-10, El
42、ectrical apparatus for explosive gas atmospheres Part 10: Classification of hazardous areas (IEC 60079-10:1995) prEN 60079-11, IEC 60079-11, Ed. 5.0: Explosive atmospheres Part 11: Equipment protection by intrinsic safety “i” EN 60079-15, Electrical apparatus for explosive gas atmospheres Part 15: C
43、onstruction, test and marking of type of protection “n“ electrical apparatus (IEC 60079-15:2005) EN 60086-1, Primary batteries Part 1: General (IEC 60086-1:2000) EN 60086-4, Primary batteries Part 4: Safety standard for lithium batteries (IEC 60086-4:2000) EN 60529, Degrees of protection provided by
44、 enclosures (IP code) (IEC 60529:1989) EN 60695-11-5, Fire hazard testing Part 11-5: Test flames Needle-flame test method Apparatus, confirmatory test arrangement and guidance (IEC 60695-11-5:2004) EN 60707, Flammability of solid non-metallic materials when exposed to flame sources List of test meth
45、ods (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 Ba
46、sic 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 measuremen
47、t 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 610
48、00-6-1, 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, Ele
49、ctricity 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
