1、BSI Standards PublicationBS EN 1434-1:2015Heat metersPart 1: General requirementsBS EN 1434-1:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 1434-1:2015.It supersedes BS EN 1434-1:2007 which is withdrawn.The UK participation in its preparation was entruste
2、d to TechnicalCommittee CPI/30, Measurement of fluid flow in closed conduits.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correcta
3、pplication. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 84658 8ICS 17.200.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Com
4、mittee on 30 November 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 1434-1:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1434-1 November 2015 ICS 17.200.10 Supersedes EN 1434-1:2007English Version Heat meters - Part 1: General requirements Compteurs
5、dnergie thermique - Partie 1: Prescriptions gnrales Wrmezhler - Teil 1: Allgemeine Anforderungen This European Standard was approved by CEN on 5 September 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
6、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-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, Fr
7、ench, 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-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgari
8、a, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turke
9、y andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref
10、. No. EN 1434-1:2015 EBS EN 1434-1:2015EN 1434-1:2015 (E) 2 Contents Page European foreword . 4 1 Scope 6 2 Normative references 6 3 Terms and definitions . 6 4 Types of instruments 11 4.1 General . 11 4.2 Complete instrument 11 4.3 Combined instrument . 11 4.4 Hybrid instrument . 11 4.5 Sub-assembl
11、ies of a heat meter, which is a combined instrument 11 4.5.1 General . 11 4.5.2 Flow sensor 12 4.5.3 Temperature sensor pair 12 4.5.4 Calculator 12 4.6 Equipment under test (EUT) 12 5 Rated operating conditions 12 5.1 Limits of temperature range 12 5.2 Limits of temperature differences . 12 5.3 Limi
12、ts of flow rate 12 5.4 Limit of thermal power 13 5.5 Limits of working pressure (PS and Pmin) 13 5.6 Nominal pressure (PN) . 13 5.7 Limits in ambient temperature . 13 5.8 Limits in deviations in supply voltage 13 5.9 Maximum pressure loss . 13 5.10 Specific requirements on registration devices 13 5.
13、10.1 General . 13 5.10.2 Suitability 13 5.10.3 Rated operated conditions . 14 5.10.4 Indication 14 5.10.5 MPE 15 6 Technical characteristics 15 6.1 Materials and construction . 15 6.2 Requirements outside the limiting values of the flow rate . 16 6.3 Display 16 6.4 Protection against fraud 16 6.5 Su
14、pply voltage . 17 6.6 Qualifying immersion depth of a temperature sensor . 17 6.7 The influence on a temperature sensor pair caused by mounting in pockets . 17 6.8 Reproducibility . 17 6.9 Repeatability 17 6.10 Software . 18 7 Specified working range 18 7.1 General . 18 BS EN 1434-1:2015EN 1434-1:20
15、15 (E) 3 7.2 Temperature difference . 18 7.3 Flow rate 18 8 Heat transmission formula . 18 9 Metrological characteristics (Maximum Permissible Error, MPE) . 19 9.1 General . 19 9.2 Values of maximum permissible errors . 19 9.2.1 Maximum permissible relative errors of complete heat meters . 19 9.2.2
16、Maximum permissible relative error of sub-assemblies . 19 9.3 Application of maximum permissible errors . 20 10 Environmental classification 20 10.1 General . 20 10.2 Environmental class A (Domestic use, indoor installations) 21 10.3 Environmental class B (Domestic use, outdoor installations) . 21 1
17、0.4 Environmental class C (Industrial installations) 21 10.5 Mechanical classes M1 to M3 21 11 Heat meter specification 21 11.1 General . 21 11.2 Flow sensor . 21 11.3 Temperature sensor pair . 23 11.4 Calculator. 23 11.5 Complete meters . 25 12 Information to be made available by the manufacturer o
18、r supplier . 26 12.1 Installation instructions . 26 12.2 Parameter setting instructions 27 12.3 Adjustment instructions 28 12.4 Maintenance instructions 28 12.5 Hints for disposal instructions 29 Annex A (normative) Heat coefficient equations . 30 Annex B (normative) Flow conditioner package 32 Anne
19、x C (normative) Fast response meters . 34 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2004/22/EC, MID 35 Bibliography . 37 BS EN 1434-1:2015EN 1434-1:2015 (E) 4 European foreword This document (EN 1434-1:2015) has been prepared by
20、 Technical Committee CEN/TC 176 “Heat meters”, the secretariat of which is held by SIS. 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 May 2016, and conflicting national standards shall be withdr
21、awn at the latest by May 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1434-1:2007. This document
22、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. For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document. EN 1434, Heat meters consi
23、sts of the following parts: Part 1: General requirements Part 2: Constructional requirements Part 3: Data exchange and interfaces1) Part 4: Pattern approval tests Part 5: Initial verification tests Part 6: Installation, commissioning, operational monitoring and maintenance In comparison to EN 1434-1
24、:2007, the following changes have been made: special cases for combined cooling and heating meters are added; additional functionality for smart metering applications are added; metrological requirements for smart metering applications are added; definitions and requirements for the cooling meter ar
25、e added; tariff meters are added; terms and definitions, requirements for registration devices and cooling meters are added; requirements for fast response meters are added (informative Annex C). 1) EN 1434-3 is maintained by CEN/TC 294. BS EN 1434-1:2015EN 1434-1:2015 (E) 5 According to the CEN/CEN
26、ELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, I
27、celand, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 1434-1:2015EN 1434-1:2015 (E) 6 1 Scope This European Standard specifies the general requirements for hea
28、t meters. Heat meters are instruments intended for measuring the energy which in a heat-exchange circuit is absorbed (cooling) or given up (heating) by a liquid called the heat-conveying liquid. The heat meter indicates the quantity of heat in legal units. Electrical safety requirements are not cove
29、red 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. This standard covers meters for closed systems only, where the differential pressure over the thermal load is limited.
30、 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amen
31、dments) applies. EN 1434-2:2015, Heat meters Part 2: Constructional requirements EN 1434-4:2015, Heat meters Part 4: Pattern approval test EN 60751, Industrial platinum resistance thermometers and platinum temperature sensors (IEC 60751) EN 61010-1, Safety requirements for electrical equipment for m
32、easurement, control and laboratory use Part 1: General requirements (IEC 61010-1) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 response time 0,5time interval between the instant when flow or temperature difference is subjected to a specifi
33、ed abrupt change and the instant when the response reaches 50 % of the step value 3.2 fast response meter meter suitable for heat exchanging circuits with rapid dynamic variations in the exchanged heat Note 1 to entry: See also Annex C. 3.3 rated voltage Unvoltage of the external power supply requir
34、ed to operate the heat meter, conventionally the voltage of the AC mains supply 3.4 rated operating conditions conditions of use, giving the range of values of influence quantities, for which the metrological characteristics of the instrument are within the specified maximum permissible errors BS EN
35、 1434-1:2015EN 1434-1:2015 (E) 7 3.5 reference conditions set of specified values of influence factors, fixed to ensure valid inter-comparison of results of measurements 3.6 influence quantity quantity, which is not the subject of the measurement, but which influences the value of the measurement an
36、d or the indication of the measuring instrument 3.7 influence factors influence quantity having a value within the rated operating conditions 3.8 disturbance influence quantity having a value outside the rated operating conditions 3.9 Types of errors 3.9.1 error (of indication) indication of the mea
37、suring instrument minus the conventional true value of the measurand 3.9.2 intrinsic error error of a measuring instrument determined under reference conditions 3.9.3 initial intrinsic error error of a measuring instrument as determined once prior to performance tests and durability tests 3.9.4 dura
38、bility error difference between the intrinsic error after a period of use and the initial intrinsic error 3.9.5 maximum permissible error MPE highest values of the error (positive or negative) permitted 3.10 Types of faults 3.10.1 fault difference between the error of indication and the intrinsic er
39、ror of the instrument 3.10.2 transitory fault momentary variations in the indication, which cannot be interpreted, memorized or transmitted as measurements BS EN 1434-1:2015EN 1434-1:2015 (E) 8 3.10.3 significant fault fault greater than the absolute value of the MPE and not being a transitory fault
40、 Note 1 to entry: If the MPE is 2 % then the significant fault is a fault larger than 2 %. 3.11 reference values of the measurand RVM specified value of the flow rate, the outlet temperature and the temperature difference, fixed to ensure valid intercomparison of the results of measurements 3.12 con
41、ventional true value quantity value attributed by agreement to a quantity for a given purpose Note 1 to entry: A conventional true value is, in general, regarded as sufficiently close to the true value for the difference to be insignificant for the given purpose. EXAMPLE A true value is the heat coe
42、fficient according to Annex A. 3.13 meter model different sizes of heat meters or sub-assemblies having a family similarity in the principles of operation, construction and materials 3.14 electronic device device employing electronic elements and performing a specific function 3.15 electronic elemen
43、t smallest physical entity in an electronic device which uses electron hole conduction in semi-conductors, or electron conduction in gases or in a vacuum 3.16 qualifying immersion depth of a temperature sensor immersion depth over which the sensor measures with an accurate temperature value Note 1 t
44、o entry: The conditions to define the qualified immersion depth are written in EN 1434-4:2015, 7.4.4.1. 3.17 self-heating effect increase in temperature signal that is obtained by subjecting each temperature sensor of a pair to a continuous power dissipation of 5 mW when immersed to the qualifying i
45、mmersion depth in a water bath, having a mean water velocity of 0,1 m/s 3.18 heat meter instrument intended for measuring the energy which in a heat-exchange circuit is absorbed (cooling) or given up (heating) by a liquid called the heat-conveying liquid BS EN 1434-1:2015EN 1434-1:2015 (E) 9 3.19 me
46、ters other than for heating 3.19.1 cooling meter heat meter designed for cooling applications at low temperatures, normally covering the temperature range 2 C to 30 C and up to 20 K 3.19.2 bifunctional meters for change-over systems between heating and cooling instrument measuring heating and coolin
47、g energy in two separate registers Note 1 to entry: In other directives and requirements, bifunctional meters are called combined meters. Key No energy recording Heating Cooling Figure 1 Example for function of heating and cooling register 3.20 flow direction direction of the liquid going through th
48、e system from inlet to outlet Note 1 to entry: The inlet is for the heating case the hot side and for the cooling case the cold side. Note 2 to entry: In the literature the word “flow” is also being used for “inlet”, and the word “return” is also being used for “outlet”. Note 3 to entry: Different t
49、emperature values for hcfor heating and cooling applications may also occur. 3.21 electrical pulse electrical signal (voltage, current or change in resistance), that departs from an initial level for a limited duration of time and ultimately returns to the original level BS EN 1434-1:2015EN 1434-1:2015 (E) 10 3.22 pulse output and input devices 3.22.1 pulse output device functional part of flow sensor, calculator or auxiliary devices EXAMPLE Remote displays or input devices of control systems. 3.22.2 pulse input device functional part
