1、C900.4-06(reaffirmed 2011)Heat meters Part 4: Pattern approval testsLegalNoticeforStandardsCanadian Standards Association (CSA) standards are developed through a consensus standards development process approved by theStandards Council of Canada. This process brings together volunteers representing v
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16、ment constitutes your acceptance of the terms and conditions of this Legal Notice.CSA Standards Update ServiceC900.4-06September 2006Title: Heat meters Part 4: Pattern approval testsPagination: 53 pages (CSA/1CSA/8 and 45 text)To register for e-mail notification about any updates to this publication
17、go to www.shop.CSA.caclick on E-mail Services under MY ACCOUNTclick on CSA Standards Update ServiceThe List ID that you will need to register for updates to this publication is 2019396.If you require assistance, please e-mail techsupportcsa.ca or call 416-747-2233.Visit CSAs policy on privacy at www
18、.csagroup.org/legal to find out how we protect your personal information.Blank pagePublished in September 2006 by Canadian Standards AssociationA not-for-profit private sector organization5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N61-800-463-6727 416-747-4044Visit our Online St
19、ore at www.ShopCSA.caC900.4-06Heat meters Part 4: Pattern approval testsCSA StandardC900.4-06 Heat meters Part 4: Pattern approval testsCSA/2 Canadian Standards Association September 2006C900.4-06Heat meters Part 4: Pattern approval testsCSA PrefaceThis is the first edition of CSA C900.4, Heat meter
20、s Part 4: Pattern approval tests, which is an adoption, with Canadian deviations, of the identically titled CEN (European Committee for Standardization) Standard EN 1434-4 (first edition, 1997-02), including amendment A1:2002. This Standard is considered suitable for use for conformity assessment wi
21、thin the stated scope of the Standard.This Standard was reviewed for Canadian adoption by the CSA Technical Committee on Thermal Energy Meters, under the jurisdiction of the Strategic Steering Committee on Performance, Energy Efficiency, and Renewables, and has been formally approved by the Technica
22、l Committee. A list of the members of the Technical Committee is available upon request. September 2006 Canadian Standards Association 2006All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission ofthe publisher. CEN material is reprinted
23、 with permission. Inquiries regarding this CSA Standard should be addressed toCanadian Standards Association5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N61-800-463-6727 416-747-4000www.csa.caTo purchase CSA Standards and related publications, visit CSAs Online Store at www.ShopCS
24、A.ca or call toll-free 1-800-463-6727 or 416-747-4044.C900.4-06 Heat meters Part 4: Pattern approval testsSeptember 2006 Canadian Standards Association CSA/3Canadian deviations2 Normative referencesAdd the followingThis Standard refers to the following publications, and the years shown indicate the
25、latest editions available at time of printing:CEN (European Committee for Standardization)ENV 13005:1999Guide to the expression of uncertainty in measurementCENELEC (European Committee for Electrotechnical Standardization)EN 60068-2-30:2005Environmental testing Part 2-30: Tests Test Db: Damp heat, c
26、yclic (12 h + 12 h cycle)EN 61000-4-8:1993Electromagnetic compatibility (EMC) Part 4-8: Testing and measurement techniques Power frequency magnetic field immunity testISO (International Organization for Standardization)4064-3:2005Measurement of water flow in fully charged closed conduits Meters for
27、cold potable water and hot water Part 3: Test methods and equipmentTable 1: Rated operating conditionsIn the fourth row, replace 230 % with 115 %5 Specification of operating conditions5.2 Reference conditionsAdd the following item to the first paragraphBasic mounting orientation 5.3 Reference values
28、 for the measurand, RVMAdd the following noteNote 1A: For heating/cooling meters, the RVM is based on the values for the heating range.+1510+1510C900.4-06 Heat meters Part 4: Pattern approval testsCSA/4 Canadian Standards Association September 20066 Tests and measurements6.1 GeneralReplace the secon
29、d paragraph with the followingAll measurements shall be carried out under the installation conditions stipulated by the supplier for his/her type of meter (e.g., straight sections of piping upstream and downstream of the meter). For all tests the heat-conveying liquid shall be water, unless otherwis
30、e specified. If another liquid is specified, 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.6.2 Test programAdd the followingFor heating/cooling meters, the tests
31、 in Clause 6.4 shall cover both functions; the tests in Clauses 6.6 and 6.9 shall be carried out using the cooling function; but all other tests shall be carried out using the heating function. (For RVM values, see Clause 5.3.)6.3 Uncertainty of test equipmentReplace this clause with the followingSt
32、andards, instruments, and methods used in pattern approval tests shall suit the purpose, be traceable to more precise standards, and be part of a reliable calibration program. The uncertainties associated with these standards, methods, and measuring instruments shall always be known. They shall be c
33、alculated in accordance with ENV 13005 with a coverage factor of 2 corresponding to a coverage probability of 95%. The expanded uncertainties shall(a) not exceed one-fifth of the maximum permissible errors of the heat meter or the sub-assemblies;(b) be subtracted from the maximum permissible errors
34、of the heat meter or the sub-assemblies to obtain a new MPE; or(c) be as specified in the test description.The use of Item (a) is recommended.Item (b) may only be used when 3 K.C900.4-06 Heat meters Part 4: Pattern approval testsSeptember 2006 Canadian Standards Association CSA/5Replace Table 2 with
35、 the followingTable 2: Test program for heat meters and their sub-assembliesTest Subclause ExposureTemperature sensor pairFlow sensorCalculating deviceComplete meterSample no.INFLUENCE FACTORSMPE 6.4 Performance test X X X X 2MPE 6.5 Dry heat X(a) X X 2MPE 6.6 Cold X(a) X X 2MPE 6.7 Static deviation
36、s insupply voltageX(a) X X 2DISTURBANCESNSFa 6.8 Durability X X X X 4NSFd 6.9 Damp heat, cyclic X(a) X X 1NSFd 6.10 Short time reduction insupply voltageX(a) X X 3NSFa 6.11 Electrical transients X(a)(b) X(b) X 3NSFd 6.12 Electromagnetic fieldX(a)(b) X(b) X 3NSFd 6.13 Electromagnetic field digital ra
37、dio equipmentX(a)(b) X(b) X 3NSFd 6.14 Radio frequency amplitude modulatedX(a)(b) X(b) X 3NSFa 6.15 Electrostatic dischargeX(a) X X 3NSFd 6.16 Static magnetic field X X X 3NSFd 6.17 Etc. (the same)MPE Maximum permissible error according to Clause 9 of EN 1434-1:1997NSFd No significant fault shall oc
38、cur during the testNSFa No significant fault shall occur after the testX Test to be performeda Only for flow sensors with electronic devicesb This test shall be done with connected cablesC900.4-06 Heat meters Part 4: Pattern approval testsCSA/6 Canadian Standards Association September 20066.4 Perfor
39、mance test6.4.1 Flow sensorAdd the following sentenceFor a meter model with more than one specified mounting orientation, the performance testing shall be performed at a limited number of the specified orientations where the higher influences are expected.6.4.3 Temperature sensors6.4.3.1 Minimum imm
40、ersion depthReplace this clause with the followingIt shall be verified in a thermostatic bath with a temperature of 90 5 C at an ambient temperature of 23 3 C that a deeper immersion than the qualifying immersion depth changes the resistance value by an amount corresponding to 0,1 K.6.4.3.2 Thermal
41、response timeReplace this clause with the followingThe temperature sensors shall be tested in accordance with Clause 4.3.3.3 of EN 60751. For sensors designed to be mounted in pockets, the test shall be made with pockets. The response time shall not exceed the suppliers specification.6.4.3.3 General
42、 testingInsert the following after the first paragraphThe immersion depth of the sensor under test shall be 90% to 99% of the total length.6.4.3.3A Testing of the influence of pocketsAdd the following clauseThe supplier shall deliver four sets consisting of one sensor with pocket selected so that th
43、e gap between pocket and sensor is(a) the minimum gap according to the specification; and(b) the maximum gap according to the specification.Only the shortest pocket length in a family shall be tested, provided that thread, material, etc., are identical for all pockets in the family.The two sensors s
44、hall be tested without pockets in accordance with Clause 6.4.3.3. The test described in Clause 6.4.3.3 shall be repeated with the sensors mounted in the pockets, and this test (including the mounting of sensors in the pockets) shall be repeated once.The calculated difference between the results with
45、 and without pockets shall be within one-third of the MPE.C900.4-06 Heat meters Part 4: Pattern approval testsSeptember 2006 Canadian Standards Association CSA/76.8 Durability test6.8.1 Flow sensor6.8.1.1 Basic testReplace the third paragraph with the followingThe basic wear test shall be carried ou
46、t at the upper limit of the temperature range.Add the following before the last sentenceFor a meter model with more than one specified mounting orientation, all tests shall be performed at the orientation where the higher influences are expected.6.8.1.2 Additional testAdd the following before the la
47、st sentenceFor a meter model with more than one specified mounting orientation, all tests shall be performed at the orientation where the higher influences are expected.6.8.2 Temperature sensorsReplace the third sentence of the first paragraph with the followingAt each limit, the temperature sensor
48、shall be immersed to an immersion depth of 90% to 99% of the total length and shall be maintained at the temperature for sufficient time to reach thermal equilibrium (according to EN 60751).Add the following paragraphIf a manufacturer proposes to use temperature sensors that are not based on standar
49、d platinum technology, samples shall be submitted to the Institute for National Measurement Standards National Research Council Canada, where long-term stability acceptance test procedures will be specified for that device.6.9 Damp heat cyclicReplace the second paragraph with the followingReference to Standard: EN 60068-2-30, Test Db: test variant 1.Replace the fourth paragraph with the followingThe heat meter or the sub-assemblies shall be switched on during the te
