1、C900.1-06(reaffirmed 2011)Heat meters Part 1: General requirementsLegalNoticeforStandardsCanadian Standards Association (CSA) standards are developed through a consensus standards development process approved by theStandards Council of Canada. This process brings together volunteers representing var
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16、nt constitutes your acceptance of the terms and conditions of this Legal Notice.CSA Standards Update ServiceC900.1-06September 2006Title: Heat meters Part 1: General requirementsPagination: 45 pages (CSA/1CSA/7 and 38 text)To register for e-mail notification about any updates to this publicationgo t
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18、group.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 Store
19、at www.ShopCSA.caC900.1-06Heat meters Part 1:General requirementsCSA StandardC900.1-06 Heat meters Part 1: General requirementsCSA/2 Canadian Standards Association September 2006C900.1-06Heat meters Part 1: General requirementsCSA PrefaceThis is the first edition of CSA C900.1, Heat meters Part 1: G
20、eneral requirements, which is an adoption, with Canadian deviations, of the identically titled CEN (European Committee for Standardization) Standard EN 1434-1 (first edition, 1997-02), including amendment A1:2002.This Standard is considered suitable for use for conformity assessment within the state
21、d 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 Technical Committee. A
22、 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 with permissi
23、on.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.ShopCSA.ca or call to
24、ll-free 1-800-463-6727 or 416-747-4044.C900.1-06 Heat meters Part 1: General requirementsSeptember 2006 Canadian Standards Association CSA/3Canadian deviations4 Definitions and symbolsAdd the following clause4.18A Meter for heating and coolingAn instrument measuring heating and cooling energy in two
25、 separate registers.5 Rated operating conditions5.4 Limit of thermal powerDelete the phrase “, Ps,”5.5 Maximum admissible working pressure, MAPReplace “MAP” with “PS” in the clause title and replace the clause with the followingThe maximum positive internal pressure that the heat meter can withstand
26、 permanently at the upper limit of the temperature range, expressed in bar.5.6 Maximum pressure lossReplace the clause title with “Nominal pressure, PN” and replace the clause with the followingA numerical designation that is a convenient rounded number for reference purposes.All equipment of the sa
27、me nominal size (DN) designated by the same PN number shall have compatible mating dimensions.5.6A Limits in ambient temperatureAdd the following clauseThe ambient temperature range in which the heat meter shall function without the maximum permissible errors being exceeded.5.6B Limits in deviations
28、 in supply voltageAdd the following clauseThe supply voltage range in which the heat meter shall function without the maximum permissible errors being exceeded.6 Technical characteristics6.3 Display6.3.7Delete the phrase “, Ps,”C900.1-06 Heat meters Part 1: General requirementsCSA/4 Canadian Standar
29、ds Association September 20066.5 Mains voltage6.5.1Add the following sentenceProvision may be made for supply voltage of 115 V AC.6.5.2Replace the second sentence with the followingThe tolerance for DC shall be 12 V to 42 V and the tolerance for AC shall be 12 V to 36 V.6.5A Qualifying immersion dep
30、th of a temperature sensorAdd the following clauseBy immersion beyond the qualifying immersion depth the resistance shall not change by more than what corresponds to 0.1 K.6.5B The influence on a temperature sensor pair caused by mounting in pocketsAdd the following clauseThe difference in measuring
31、 result with and without specified pockets shall be within one-third of the MPE.9 Metrological characteristics (Maximum Permissible Errors, MPE)9.2.2 Maximum permissible relative error of sub-assemblies9.2.2.3 Flow sensorReplace this clause with the followingClass 1: Ef= (1 + 0,01 qp/q), but not mor
32、e than 3,5%.Class 2: Ef= (2 + 0,02 qp/q), but not more than 5%.Class 3: Ef= (3 + 0,05 qp/q), but not more than 5%.where the error, Ef, relates the indicated value to the conventional true value of the relationship between flow sensor output signal and mass or volume.10 Environmental classification10
33、.1 Environmental class A (Domestic use, indoor installations)Add the following item Low level mechanical conditionsC900.1-06 Heat meters Part 1: General requirementsSeptember 2006 Canadian Standards Association CSA/511 Heat meter specification11.1 Flow sensorReplace the third item with the following
34、 Accuracy class; may differ depending on mounting orientation and on type of liquidReplace the fourth item with the following Limits of flow rate (qi, qpand qs). Different sets of qiand qsmay be given depending on mounting orientation and type of liquidReplace the fifth item with the following Maxim
35、um admissible working pressure for direct-mounted sensors (PS in bar)Replace the eighth item with the following Limits of temperature (minand max). An additional set of limits for the cooling range may be specified for heating/cooling metersReplace the tenth item with the following Installation requ
36、irements including installation pipe lengths, etc.Replace the eleventh item with the following Basic mounting orientation and other specified orientationsAdd the following item Environmental classification11.2 Temperature sensor pairReplace the third item with the following Limits of temperature (mi
37、nand max). An additional set of limits for the cooling range may be specified for heating/cooling metersReplace the fourth item with the following Limits of temperature difference (minand max). An additional set of limits for the cooling range may be specified for heating/cooling meters11.3 Calculat
38、orIn the fourth item, delete “(Ps)”Replace the fifth item with the following Limits of temperature (minand max). An additional set of limits for the cooling range may be specified for heating/cooling metersC900.1-06 Heat meters Part 1: General requirementsCSA/6 Canadian Standards Association Septemb
39、er 2006Replace the sixth item with the following Limits of temperature difference (minand max). An additional set of limits for the cooling range may be specified for heating/cooling metersAdd the following items The conditions for switching between heating and cooling metering, if applicable Provis
40、ion can be made for display options in yard/pound (imperial) units, with conversion to these units after the fundamental calculations have been done in SI units11.4 Complete metersReplace the third item with the following Accuracy class; may differ depending on mounting orientation and on type of li
41、quidIn the seventh item, delete the abbreviation “Ps”Replace the eighth item with the following Limits of flow rate (qi, qpand qs). Different sets of qiand qsmay be given depending on mounting orientation and type of liquidReplace the tenth item with the following Maximum admissible working pressure
42、 (PS in bar)Replace the thirteenth item with the following Limits of temperature (minand max). An additional set of limits for the cooling range may be specified for heating/cooling metersReplace the fourteenth item with the following Limits of temperature difference (minand max). An additional set
43、of limits for the cooling range may be specified for heating/cooling metersReplace the fifteenth item with the following Installation requirements, including installation pipe lengths, etc.Replace the sixteenth item with the following Basic mounting orientation and other specified orientationsAdd th
44、e following items The conditions for switching between heating and cooling metering, if applicable Nominal pressure (PN)C900.1-06 Heat meters Part 1: General requirementsSeptember 2006 Canadian Standards Association CSA/7Annex A(normative)Heat coefficient equationsIn the unnumbered table, replace the heat coefficient values 4,0874 and 4,1621 in the last row with 4,087442 and 4,162135, respectivelyBlank page
