1、BRITISH STANDARD BS EN 12405-1:2005Gas meters Conversion devices Part 1: Volume conversionICS 91.140.80nullnull nullnullnullnullnullnullnull nullnullnullnullnullnullnull nullnullnull nullnullnullnullnullnullnullnullnullnull nullnullnullnullnullnull nullnull nullnullnullnullnullnullnullnullnull nulln
2、ull nullnullnullnullnullnullnullnullnull nullnullnull+A2:2010National forewordThis British Standard is the UK implementation of EN 12405-1:2005+A2:2010. It supersedes BS EN 12405-1:2005 which is withdrawn.The start and finish of text introduced or altered by amendment is indicated in the text by tag
3、s !“. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by !“.The UK participation in its preparation was entrusted to Technical Committee GSE/25, Gas meters.A list of organizations represented on GSE/25 can be obtai
4、ned on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.BS EN 12405-1:2005+A2:2010This British Standard
5、waspublished under the authorityof the Standards Policy andStrategy Committeeon 28 June 2005 BSI 2011Amendments/corrigenda issued since publicationAmd. No. Date Comments 16647 31 October 2006Implementation of CEN amendment A1:200631 January 2011Implementation of CEN mendment A2:2010ISBN 978 0 580 69
6、600 8aEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12405-1:2005+A2 October 2010 ICS 91.140.40 Supersedes EN 12405-1:2005English Version Gas meters - Conversion devices - Part 1: Volume conversion Compteurs de gaz - Dispositifs de conversion - Partie 1: Conversion de volume Gaszhler - Umwerte
7、r - Teil 1: Volumenumwertung This European Standard was approved by CEN on 15 March 2005 and includes Amendment 1 approved by CEN on 6 July 2006 and Amendment 2 approved by CEN on 19 September 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditi
8、ons 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 Management Centre or to any CEN member. This European Standard exists in three
9、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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Aus
10、tria, Belgium, Bulgaria, Croatia, 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. EUR
11、OPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12405-1:2005+A2:2010: EEN 1
12、2405-1:2005+A2:2010 (E) 2 Contents Page Foreword 91 Scope 102 Normative references 103 Terms, definitions and symbols . 123.1 Terms and definitions . 123.2 Symbols 153.3 !Classification“ . 173.3.1 Mechanical classes . 173.3.2 Electromagnetic environmental classes . 174 Principle of measurement . 174
13、.1 Conversion as a function of temperature . 174.2 Conversion as a function of pressure and temperature 174.3 Conversion as a function of pressure, temperature and deviation from the ideal gas law . 184.4 Correction of the volume at measurement conditions 195 Rated operating conditions 195.1 Specifi
14、ed field of measurement 195.1.1 Specified measurement range for gas pressure 195.1.2 Specified measurement range for gas temperature . 195.1.3 Gas characteristics 205.1.4 !Base conditions“ 205.2 !Environmental conditions“ 205.2.1 Ambient temperature range 205.2.2 Humidity range . 205.2.3 !Mechanical
15、 environment“ 205.2.4 Electromagnetic environment 205.3 Power supply 206 Construction requirements . 206.1 General 206.2 Casings . 216.3 Indications 226.3.1 General 226.3.2 Electronic indicating device . 236.4 Inputs for volume conversion 246.5 Battery powered conversion device 246.6 Security device
16、s and alarms 257 Installation requirements 257.1 General 257.2 Temperature transducer . 267.3 Pressure transducer 268 Performance . 268.1 Reference conditions 268.2 Rated operating conditions 278.3 Maximum permissible errors 278.3.1 General 278.3.2 Error of conversion 288.3.3 Specific errors for a g
17、as-volume conversion device, type 2 . 288.4 Conditions of matching the constituent elements of a conversion device type 2 . 288.5 Influence factors 29BS EN 12405-1:2005+A2:2010EN 12405-1:2005+A2:2010 (E) 3 8.6 Disturbances 298.7 Durability 298.8 !Repeatability“ 298.9 !Reliability“ . 309 Tests of con
18、formity . 309.1 Verification of the construction requirements . 309.2 Verification of the performance requirements . 309.2.1 Test conditions 309.2.2 Samples of gas volume conversion device type 1 required for testing 319.2.3 Samples of gas volume conversion devices type 2 required for testing 349.3
19、Test report 3410 Marking . 3411 !Installation and operating instructions“ 35Annex A (normative) Type test . 37A.1 General conditions 37A.1.1 General 37A.1.2 Additional conditions specific to gas volume conversion devices type 1 37A.1.3 Additional conditions specific to gas-volume conversion devices
20、type 2 37A.1.4 Test procedures . 38A.1.5 Verification of the construction requirements . 39A.2 Accuracy tests under reference conditions 39A.2.1 Objective . 39A.2.2 Reference to documents . 40A.2.3 Procedure . 40A.2.4 Acceptance criteria 40A.3 Effect of ambient temperature 40A.3.1 Objective . 40A.3.
21、2 Reference to documents . 40A.3.3 Procedure . 40A.3.4 Acceptance criteria 40A.4 Effect of damp heat, steady state test . 40A.4.1 Objective . 40A.4.2 Reference to documents . 40A.4.3 Procedure . 41A.4.4 Acceptance criteria 41A.5 Effect of damp heat, cyclic test 41A.5.1 Objective . 41A.5.2 Reference
22、to documents . 41A.5.3 Procedure . 41A.5.4 Acceptance criteria 42A.6 Electrical power variation . 42A.6.1 Objective . 42A.6.2 Reference to documents . 42A.6.3 Procedure . 42A.6.4 Acceptance criteria 42A.7 Short time power reductions 43A.7.1 Objective . 43A.7.2 Reference to documents . 43A.7.3 Proced
23、ure . 43A.7.4 Acceptance criteria 43A.8 Electrical bursts . 43A.8.1 Objective . 43A.8.2 Reference to documents . 43A.8.3 Procedure . 43A.8.4 Acceptance criteria 43A.9 Electromagnetic susceptibility . 44A.9.1 Objective . 44A.9.2 Reference to documents . 44A.9.3 Procedure . 44BS EN 12405-1:2005+A2:201
24、0EN 12405-1:2005+A2:2010 (E) 4 A.9.4 Acceptance criteria 44A.10 Electrostatic discharges . 44A.10.1 Objective . 44A.10.2 Reference to documents . 44A.10.3 Procedure . 44A.10.4 Acceptance criteria 45A.11 Overload of pressure (only for type 1 and pressure transducers) . 45A.11.1 Objective . 45A.11.2 R
25、eference to documents . 45A.11.3 Procedure . 45A.11.4 Acceptance criteria 45A.12 Effect of vibrations 45A.12.1 Objective . 45A.12.2 Reference to documents . 45A.12.3 Procedure . 46A.12.4 Acceptance criteria 46A.13 Effect of shocks . 46A.13.1 Objective . 46A.13.2 Reference to documents . 46A.13.3 Pro
26、cedure . 46A.13.4 Acceptance criteria 46A.14 Overload of pressure (mechanical) 46A.14.1 Objective . 46A.14.2 Reference to documents . 47A.14.3 Procedure . 47A.14.4 Acceptance criteria 47A.15 Durability 47A.15.1 Objective . 47A.15.2 Reference to documents . 47A.15.3 Procedure . 47A.15.4 Acceptance cr
27、iteria 48A.16 Alarms operation . 48A.16.1 Objective . 48A.16.2 Reference to documents . 48A.16.3 Procedure . 48A.16.4 Acceptance criteria 48A.17 !Repeatability . 48A.17.1 Objective . 48A.17.2 Reference to standards . 48A.17.3 Procedure . 49A.17.4 Acceptance criteria“ 49A.18 #Short time DC power vari
28、ations 49A.18.1 Objective . 49A.18.2 Reference to standards . 49A.18.3 Procedure . 49A.18.4 Acceptance criteria$ 49A.19 #Surges on supply lines and/or signal lines . 49A.19.1 Objective . 49A.19.2 Reference to standards . 50A.19.3 Procedure . 50A.19.4 Acceptance criteria$ 50A.20 #Power frequency magn
29、etic field . 50A.20.1 Objective . 50A.20.2 Reference to standards . 50A.20.3 Procedure . 50A.20.4 Acceptance criteria$ 50Annex B (normative) Pressure transducers 51B.1 Scope 51B.2 Rated operating conditions 51B.2.1 Specified measurement range for pressure . 51BS EN 12405-1:2005+A2:2010EN 12405-1:200
30、5+A2:2010 (E) 5 B.2.2 Environmental class 51B.2.3 Power supply . 51B.3 Construction requirements. 51B.3.1 General 51B.3.2 Casings . 51B.3.3 Indications 51B.4 Performances . 52B.4.1 Reference conditions 52B.4.2 Rated operating conditions 52B.4.3 Maximum permissible errors 52B.4.4 Influence factors 52
31、B.4.5 Disturbances 52B.4.6 Durability 52B.5 Tests of conformity . 53B.5.1 Test conditions 53B.5.2 Tests 53B.5.3 Sample of pressure transducers required for testing . 53B.6 Marking . 53Annex C (normative) Platinum resistance thermometer sensors . 54C.1 Scope 54C.2 Operating rated conditions . 54C.2.1
32、 Specified measurement range for temperature 54C.2.2 Environmental class 54C.3 Construction requirements. 54C.4 Performances . 54C.5 Marking . 55C.5.1 Required markings 55C.5.2 Verification mark 55C.6 Metrological verifications . 55C.6.1 Type approval 55C.6.2 Initial verification . 56C.7 Verificatio
33、n procedure. 56C.7.1 Visual inspection . 56C.7.2 Type testing (type approval) . 56C.7.3 Samples of PRT required for testing . 56C.7.4 Initial verification . 56Annex D (normative) Temperature transducers . 58D.1 Scope 58D.2 Rated operating conditions 58D.2.1 Specified measurement range for temperatur
34、e 58D.2.2 Environmental class 58D.2.3 Power supply . 58D.3 Construction requirements. 58D.3.1 General 58D.3.2 Casings . 58D.3.3 Indications 58D.4 Performances . 59D.4.1 Reference conditions 59D.4.2 Rated operating conditions 59D.4.3 Maximum permissible errors 59D.4.4 Influence factors 59D.4.5 Distur
35、bances 59D.4.6 Durability 59D.5 Tests of conformity . 60D.5.1 Test conditions 60D.5.2 Tests 60D.5.3 Sample of temperature transducers required for testing 60D.6 Marking . 60Annex E (informative) Model type test report for conversion devices . 61BS EN 12405-1:2005+A2:2010EN 12405-1:2005+A2:2010 (E) 6
36、 E.1 General 61E.1.1 General remarks. 61E.1.2 Number of pages 61E.1.3 Laboratorys identification 61E.1.4 Applicant . 61E.1.5 Identification of device(s) submitted for testing 61E.2 Accuracy tests under reference conditions 62E.2.1 Ambient temperature during the test. 62E.2.2 Test equipment used . 62
37、E.2.3 Test results . 62E.3 Ambient temperature . 63E.3.1 Effect of dry heat 63E.3.2 Effect of cold 64E.4 Effect of damp heat, steady state test . 66E.4.1 Ambient temperature during the test. 66E.4.2 Test equipment used . 66E.4.3 Test results . 66E.5 Effect of damp heat, cyclic test 67E.5.1 Ambient t
38、emperature during the test. 67E.5.2 Test equipment used . 67E.5.3 Test results . 68E.6 Electrical power variation . 69E.6.1 AC power supply 69E.6.2 DC power supply or battery supply . 71E.7 Short time power reductions 72E.7.1 Test equipment used . 72E.7.2 Test results . 72E.8 Electrical bursts . 73E
39、.8.1 Test equipment used . 73E.8.2 Test results . 73E.9 Electromagnetic immunity 75E.9.1 Test equipment used . 75E.9.2 Test results . 75E.10 Electrostatic discharges . 75E.10.1 Test equipment used . 75E.10.2 Test results . 76E.11 Effect of an overload of static pressure 76E.11.1 Ambient temperature
40、during the test. 76E.11.2 Test equipment used . 76E.11.3 Test results . 77E.12 Effect of vibrations 78E.12.1 Ambient temperature during the test. 78E.12.2 Test equipment used . 78E.12.3 Test results . 78E.13 Effect of shocks . 79E.13.1 Ambient temperature during the test. 79E.13.2 Test equipment use
41、d . 79E.13.3 Test results . 79E.14 Mechanical resistance to overload of static pressure . 80E.14.1 Ambient temperature during the test. 80E.14.2 Test equipment used . 80E.14.3 Test results . 80E.15 Durability 80E.15.1 Ambient temperature during the test. 80E.15.2 Test equipment used . 80E.15.3 Test
42、equipment used . 81E.16 !Alarms operation 84E.16.1 Ambient temperature during the test. 84E.16.2 Test equipment used . 84E.16.3 Test results . 84E.17 Repeatability“ . 84BS EN 12405-1:2005+A2:2010EN 12405-1:2005+A2:2010 (E) 7 E.18 #Short time DC power variations 84E.18.1 Test equipment used . 84E.18.
43、2 Test results$ . 84E.19 #Surges on supply lines and/or signal lines . 85E.19.1 Test equipment used . 85E.19.2 Test results$ . 85E.20 #Power frequency magnetic field . 86E.20.1 Test equipment used . 86E.20.2 Test results$ . 86Annex F (informative) Model type test report for associated transducers 88
44、F.1 General 88F.1.1 General remarks 88F.1.2 Number of pages . 88F.1.3 Laboratorys identification 88F.1.4 Applicant 88F.1.5 Identification of device(s) submitted for testing 88F.2 Accuracy tests under reference conditions 89F.2.1 Ambient temperature during the test 89F.2.2 Test equipment used . 89F.2
45、.3 Test results . 89F.3 Ambient temperature . 89F.3.1 Effect of dry heat . 89F.3.2 Effect of cold 90F.4 Effect of damp heat, steady state test . 91F.4.1 Ambient temperature during the test 91F.4.2 Test equipment used . 91F.4.3 Test results . 91F.5 Effect of damp heat, cyclic test 92F.5.1 Ambient temperature during the test 92F.5.2 Test equipment used . 92F.5.3 Test results . 93F.6 Electrical power variation . 93F.6.1 AC power supply . 93F.6.2 DC power supply or battery supply . 95F.7 Short time power r
