1、Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 26/03/2008 06:48, Uncontrolled Copy, (c) BSIg49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58T
2、he European Standard EN 1434-4:2007 has the status of a British StandardICS 17.200.10Heat meters Part 4: Pattern approval testsBRITISH STANDARDBS EN 1434-4:2007Incorporating corrigendum no. 1BS EN 1434-4:2007Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 26/03/2008 06:48, Uncontrolled Copy,
3、(c) BSIThis British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2007 BSI 2007ISBN 978 0 580 60757 8Amendments issued since publicationAmd. No. Date Comments17511Corrigendum No. 131 December 2007 See national forewordCPI/30/7, Volume flow-rate m
4、ethods.A list of organizations represented on this committee can be obtained 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 immunit
5、y from legal obligations.National forewordThis British Standard is the UK implementation of EN 1434-4:2007, incorporating corrigendum October 2007. It supersedes BS EN 1434-4:1997 which is withdrawn.The start and finish of text introduced or altered by corrigendum is indicated in the text by tags .
6、Text altered by CEN corrigendum October 2007 is indicated in the text by .The UK participation in its preparation was entrusted by Technical Committee CPI/30, Measurement of fluid flow in closed conduits, to Subcommittee EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 1434-4February 2007ICS 17.200
7、.10 Supersedes EN 1434-4:1997 English VersionHeat meters - Part 4: Pattern approval testsCompteurs dnergie thermique - Partie 4: Essais en vuede lapprobation de modleWrmezhler - Teil 4: Prfungen fr die BauartzulassungThis European Standard was approved by CEN on 7 January 2007.CEN members are bound
8、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 Ma
9、nagement 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
10、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
11、, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN 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 CE
12、N national Members.Ref. No. EN 1434-4:2007: EIncorporating corrigendum October 2007 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 26/03/2008 06:48, Uncontrolled Copy, (c) BSIEN 1434-4:2007 (E) 2 Contents Page Foreword4 1 Scope 5 2 Normative references 5 3 General6 4 Requirements.6 5 Specifi
13、cation of operating conditions .6 5.1 Rated operating conditions 6 5.2 Reference conditions 6 5.3 Reference values for the measurand, RVM.7 5.3.1 General7 5.3.2 Reference values for the measurand, RVM, for qp 3,5 m3/h .7 5.3.3 Reference values for the measurand, RVM, for qp 3,5 m3/h .7 6 Tests and m
14、easurements8 6.1 General8 6.2 Test programme.8 6.3 Uncertainty of test equipment10 6.4 Performance tests10 6.4.1 General10 6.4.2 Flow sensor10 6.4.3 Calculator .12 6.4.4 Temperature sensors 12 6.4.5 Combined sub-assemblies or complete meter.13 6.5 Dry heat.14 6.5.1 General14 6.5.2 Calculator .14 6.5
15、.3 Flow sensor14 6.5.4 Combined sub-assemblies or complete meter.14 6.6 Cold .14 6.6.1 General14 6.6.2 Calculator .15 6.6.3 Flow sensor15 6.6.4 Combined sub-assemblies or complete meter.15 6.7 Static deviations in supply voltage15 6.8 Durability test.17 6.8.1 General17 6.8.2 Flow sensor17 6.8.3 Temp
16、erature sensors 18 6.8.4 Combined sub-assemblies or complete meter.19 6.9 Damp heat cyclic19 6.10 Short time mains voltage reduction.20 6.11 Electrical transients.20 6.11.1 Fast transients (bursts).20 6.11.2 Surge transients.22 6.12 Electromagnetic field 24 6.13 Electromagnetic field specifically ca
17、used by digital radio equipment 24 6.14 Radio frequency amplitude modulated .25 6.15 Electrostatic discharge .27 6.16 Static magnetic field (fraud protection).28 6.17 Electromagnetic field at mains frequency 29 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 26/03/2008 06:48, Uncontrolled Cop
18、y, (c) BSIEN 1434-4:2007 (E) 3 6.18 Internal pressure .29 6.19 Pressure loss .30 6.20 Electromagnetic emission30 6.20.1 General .30 6.20.2 Conducted emission on power AC lines.30 6.20.3 Conducted emission on signal and DC power lines30 6.20.4 Radiated emission.31 6.21 24 h interruption in the mains
19、power supply voltage 31 6.22 Flow disturbances .31 7 Documentation 32 Annex A (informative) Testing procedure for temperature sensor pairs with or without pockets33 A.1 Test set-up .33 A.2 Test sequence35 A.3 Calculations .35 Annex B (informative) Checklist for type approvals of heat meters accordin
20、g to EN 143436 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2004/22/EC, MID 46 Bibliography47 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 26/03/2008 06:48, Uncontrolled Copy, (c) BSIEN 1434-4:2007 (E) 4 Foreword This doc
21、ument (EN 1434-4:2007) has been prepared by Technical Committee CEN/TC 176 “Heat meters”, the secretariat of which is held by DS. 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 August 2007, and c
22、onflicting national standards shall be withdrawn at the latest by August 2007. This document supersedes EN 1434-4:1997. The other parts are: Part 1 - General requirements Part 2 - Constructional requirements Part 3 - Data exchange and interfaces Part 5 - Initial verification tests Part 6 - Installat
23、ion, commissioning, operational monitoring and maintenance According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
24、France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 26/03/2008 06:48, Uncontrolled Co
25、py, (c) BSIEN 1434-4:2007 (E) 5 1 Scope This European Standard specifies pattern approval tests and applies to heat meters, that is to instruments intended for measuring the heat which, in a heat-exchange circuit, is absorbed (cooling) or given up (heating) by a liquid called the heat-conveying liqu
26、id. The heat meter indicates the quantity of heat in legal units. Electrical safety requirements are not covered by this European Standard. Pressure safety requirements are not covered by this European Standard. Surface mounted temperature sensors are not covered by this European Standard. 2 Normati
27、ve 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 (including any amendments) applies. ENV 13005, Guide to the expression
28、of uncertainty in measurement EN 1434-1:2007, Heat meters Part 1: General requirements EN 14154-3:2005, Water meters Part 3: Test methods and equipment EN 55022:, Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement (CISPR 22:2005, modified) EN 600
29、68-2-1, Environmental testing Part 2: Tests Test A: Cold (IEC 60068-2-1:1990) EN 60068-2-2, Basic environmental testing procedures Part 2-2: Tests Tests B: Dry heat (IEC 60068-2-2:1974 + IEC 60068-2-2A:1976) EN 60068-2-30, Environmental testing Part 2-30: Tests Test Db: Damp heat, cyclic (12 h + 12
30、h cycle) (IEC 60068-2-30:2005) EN 60751:1995, Industrial platinum resistance thermometer sensors (IEC 60751:1983 + A1:1986) 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
31、-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 61000-4-4, Electromagnetic compatibility (EMC) Part 4-4: Testing and measurement techniques Electrical fast t
32、ransient/burst immunity test (IEC 61000-4-4:2004) EN 61000-4-5, Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques Section 5: Surge immunity test (IEC 61000-4-5:1995) EN 61000-4-6:1996, Electromagnetic compatibility (EMC) Part 4-6: Testing and measurement techniques Secti
33、on 6: Immunity to conducted disturbances, induced by radio-frequency fields (IEC 61000-4-6:1996) 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) Licensed Co
34、py: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 26/03/2008 06:48, Uncontrolled Copy, (c) BSIEN 1434-4:2007 (E) 6 EN 61000-4-11, Electromagnetic compatibility (EMC) Part 4-11: Testing and measuring techniques Voltage dips, short interruption and voltage variations immunity tests (IEC 61000-4-1:2004) ISO
35、4064-3:2005, Measurement of water flow in fully charged closed conduits Meters for cold potable water and hot water Part 3: Test methods and equipment 3 General The procedure shall ascertain that the pattern conforms to the metrological requirements of this European Standard. In addition to the chec
36、king of the documentation (Clause 7) and the comparison of the pattern with the metrological requirements of this European Standard, the tests in Clause 6 shall be performed. It is recommended to use a checklist as in Annex B to report in a standardised way the result of the comparison between the p
37、attern under approval with the essential requirements of this European Standard. 4 Requirements Under normal operating conditions, the error of heat meters or their sub-assemblies shall not exceed the maximum permissible error, MPE specified in EN 1434-1. When heat meters or their sub-assemblies are
38、 exposed to disturbances, significant faults shall not occur. 5 Specification of operating conditions 5.1 Rated operating conditions The rated operating conditions are those given in Table 1. Table 1 Rated operating conditions Environmental class A B C Ambient temperature in C + 5 to + 55 -25 to +55
39、 +5 to +55 Relative humidity in % 3,5 m3/h Flow-rate simulation for the flow sensor electronics is allowed, but testing with water is always preferred and carried out in accordance with 5.3.2. If flow-rate simulation is used, the following RVM values apply: Range of temperature differences: For heat
40、ing applications: (40 2) K or K02max if max is less than 40 K For cooling applications: (10 2) K Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 26/03/2008 06:48, Uncontrolled Copy, (c) BSIEN 1434-4:2007 (E) 8 The temperature of the liquid in the flow sensor shall be kept at (50 5) C or at am
41、bient temperature Range of flow-rate: (0,7 to 0,75) qpThe power and signal wires shall be connected. The flow sensor including flow sensor electronics shall be operated at zero flow rate (without low flow cut off device). 6 Tests and measurements 6.1 General Unless otherwise stated in the test speci
42、fication, the test requirements apply irrespective of the heat meters environmental class. See Clause 10 of EN 1434-1:2007. All measurements shall be carried out under the installation conditions stipulated by the supplier for his type of meter (e.g. straight sections of piping upstream and downstre
43、am of the meter). For all tests the heat conveying liquid shall be water, unless otherwise specified. If so, the performance test shall be carried out with the specified liquid and the type approval certificate shall include the specification of the liquid to be used for initial verification. If a t
44、emperature sensor can be installed in the flow sensor, this shall be done during the performance tests of the flow sensor. Where a filter or strainer is an integral part of the flow sensor, it shall be included in all the tests. If the error determined lies outside the MPE, the test shall be repeate
45、d twice unless otherwise stated. The test is then declared satisfactory if both the arithmetic mean of the result of the three tests and at least two of the test results are within or at the MPE. Depending on the flow sensor size the tests and measurements to be carried out are described below: For
46、each meter model the test in 6.4, 6.18 and 6.19 can be carried out on a limited number of sizes according to an evaluation by the testing laboratory. This evaluation shall be included in the type testing report. The test in 6.8 shall be carried out only for those sizes of a type for which the highes
47、t wear is expected. For dimensions DN 200, 6.19 shall be carried out at min. For each meter model the following tests shall be carried out on one size only: 6.5, 6.6, 6.7, 6.9, 6.10, 6.11, 6.12, 6.13, 6.14, 6.15, 6.16, 6.17, 6.20 and 6.21. 6.2 Test programme Samples of a heat meter, or its sub-assem
48、blies, submitted for pattern approval, shall be subject to tests to verify their conformity with Clause 4. Unless otherwise stated, the tests shall be carried out at reference con-ditions and the samples shall be exposed to the influence factors or disturbances specified for the respective tests, as
49、 stated in Table 3. The test sequence and the number of items used shall be either as described in Table 2 or as agreed between the supplier and the testing laboratory (assuming four samples, numbered by the testing laboratory). Only one influence quantity shall be applied at a time. If the meter under test (complete, combined or sub-assemblies) has test outputs for quantity of water, temperature difference and/or energy, these outputs can be used to test such parameters. Licensed Copy: Wang
