1、February 2016 English price group 18No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 17.200.10!%LS%“2414802www.din.d
2、eDIN EN 1434-2Heat meters Part 2: Constructional requirements;English version EN 1434-2:2015,English translation of DIN EN 1434-2:2016-02Wrmezhler Teil 2: Anforderungen an die Konstruktion;Englische Fassung EN 1434-2:2015,Englische bersetzung von DIN EN 1434-2:2016-02Compteurs dnergie thermique Part
3、ie 2: Prescriptions de fabrication;Version anglaise EN 1434-2:2015,Traduction anglaise de DIN EN 1434-2:2016-02SupersedesDIN EN 1434-2:2007-05 andDIN EN 1434-2 Corrigendum 1:2008-04www.beuth.deDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered autho
4、ritative.Document comprises 43 pages 02.16 DIN EN 1434-2:2016-02 2 A comma is used as the decimal marker. National foreword This document (EN 1434-2:2015) has been prepared by Technical Committee CEN/TC 176 “Heat meters” (Secretariat: SIS, Sweden). The responsible German body involved in its prepara
5、tion was DIN-Normenausschuss Heiz- und Raumluft-technik (DIN Standards Committee Heating and Ventilation Technology), Working Committee NA 041-03-05 AA Wrmezhler (SpA zu CEN/TC 176). Amendments This standard differs from DIN EN 1434-2:2007-05 and DIN EN 1434-2 Corrigendum 1:2008-04 as follows: a) ad
6、ditional functionalities for smart metering applications have been included; b) minimum requirements for the test signal output of calculators have been specified; c) minimum requirements for the test data interface of complete heat meters have been specified; d) new forms of pockets and sensors and
7、 parameter setting and adjustment through the interface have been added. Previous editions DIN EN 1434-2: 1997-04, 2003-02, 2007-05 DIN EN 1434-2 Corrigendum 1: 2008-04 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1434-2 November 2015 ICS 17.200.10 Supersedes EN 1434-2:2007English Version He
8、at meters - Part 2: Constructional requirements Compteurs dnergie thermique - Partie 2: Prescriptions de fabrication Wrmezhler - Teil 2: Anforderungen an die Konstruktion This European Standard was approved by CEN on 5 September 2015. CEN members are bound to comply with the CEN/CENELEC Internal Reg
9、ulations which stipulate the conditions 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-CENELEC Management Centre or to any CEN mem
10、ber. This European Standard exists in three 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-CENELEC Management Centre has the same status as the official versions.
11、CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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
12、, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United 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
13、 any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1434-2:2015 EEN 1434-2:2015 (E) 2 Contents Page European foreword . 3 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 Temperature sensors 6 4.1 General 6 4.2 Mechanical design . 6 4.3 Platinum temper
14、ature sensor . 11 4.4 Other temperature sensors 13 5 Flow sensors 13 5.1 Maximum admissible working pressure, PS in bar . 13 5.2 Sizes and dimensions 14 5.3 Test signal output. 15 5.4 Adjusting device . 15 6 Calculators 16 6.1 Terminals - specification and identification 16 6.2 Batteries 18 6.3 Dyna
15、mic behaviour . 18 6.4 Test signal output. 18 6.5 24 h interruption in supply voltage . 19 7 Complete meter 19 8 Interfaces between sub-assemblies 19 8.1 General . 19 8.2 Definitions for pulse device interfaces . 19 9 Marking and security seals . 22 9.1 Marking 22 9.2 Sites for marking 24 9.3 Securi
16、ty seals . 24 Annex A (informative) Examples of temperature sensors 25 Annex B (normative) Input and output test signals 36 Annex C (informative) Low voltage Power Supply for heat meters and their sub-assemblies 38 C.1 Remote supply . 38 C.2 Local external DC supply . 38 C.3 Power supply specificati
17、ons . 38 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2004/22/EC, MID . 40 Bibliography . 41 DIN EN 1434-2:2016-02 EN 1434-2:2015 (E) 3 European foreword This document (EN 1434-2:2015) has been prepared by Technical Committee CEN/T
18、C 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 withdrawn at the latest by May 2
19、016. 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 1434-2:2007. This document has been prepared under a
20、mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. EN 1434-2, Heat meters consists of the followi
21、ng 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 1434-2:2007, the followi
22、ng changes have been made: additional functionalities for smart metering applications are added; minimum requirements for test signal output of calculators are added; minimum requirements for test data interface of complete heat meters are added; new forms of pockets and sensors and parmeter setting
23、 and adjustment through interface are added. 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, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Forme
24、r Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, 1) EN 1434-3 is maintained by CEN/TC 294. DIN EN 1434-2:2016-02 EN 1434-2:2015 (E) 4 Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, S
25、witzerland, Turkey and the United Kingdom. DIN EN 1434-2:2016-02 EN 1434-2:2015 (E) 5 1 Scope This European Standard specifies the constructional requirements for heat meters. Heat meters are instruments intended for measuring the energy which in a heat-exchange circuit is absorbed (cooling) or give
26、n 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 covered by this European Standard. Pressure safety requirements are not covered by this European Standard. Surface mounted temperature sen
27、sors 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. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensabl
28、e for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1092-1, Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, PN designated Part
29、1: Steel flanges EN 1092-2, Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, PN designated Part 2: Cast iron flanges EN 1092-3, Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, PN designated Part 3: Copper alloy flanges EN 1
30、434-1:2015, Heat meters Part 1: General requirements EN 1434-3, Heat Meters Part 3: Data exchange and interfaces EN 60751:2008, Industrial platinum resistance thermometers and platinum temperature sensors (IEC 60751:2008) EN 60947-5-6, Low-voltage switchgear and controlgear Part 5-6: Control circuit
31、 devices and switching elements DC interface for proximity sensors and switching amplifiers (NAMUR) (IEC 60947-5-6) EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances and designation (ISO 228-1) ISO 4903, Information technology Data comm
32、unication 15-pole DTE/DCE interface connector and contact number assignments 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1434-1:2015 apply. DIN EN 1434-2:2016-02 EN 1434-2:2015 (E) 6 4 Temperature sensors 4.1 General The temperature sensor sub-ass
33、embly shall consist of platinum resistance temperature sensors selected as matched pairs. Other types of temperature sensor pairs may be used, where the sub-assembly consists, inseparably, of temperature sensors and calculator. The maximum admissible working pressure shall be declared by the manufac
34、turer. Where no dimensional tolerance is specified, the values shall be taken from Table 1. Table 1 Tolerances Dimension mm 0,5 up to 3 over 3 up to 6 over 6 up to 30 over 30 up to 120 over 120 up to 400 Tolerance mm 0,2 0,3 1 1,5 2,5 4.2 Mechanical design 4.2.1 General For pipe sizes up to and incl
35、uding DN 250, 3 different temperature sensor types are standardized: direct mounted short probes - Type DS; direct mounted long probes - Type DL; pocket mounted long probes - Type PL. Types PL and DL can be either head probes or have permanently connected signal leads. Type DS shall have permanently
36、 connected signal leads only. 4.2.2 Materials of temperature probe sheath and pocket The temperature pocket and the protective sheath of direct mounted probes shall be of a material that is adequately strong and resistant to corrosion and has the requisite thermal conductivity. A suitable material h
37、as been shown to be EN 10088-3 X6 Cr Ni Mo Ti 17 12 2. 4.2.3 Dimensions of direct mounted short probes - Type DS The dimensions shall be as given in Figure 1. Further non-normative information is given in Annex A, Figure A.1. The qualifying immersion depth shall be 20 mm or less if so specified by t
38、he manufacturer. DIN EN 1434-2:2016-02 EN 1434-2:2015 (E) 7 Dimensions in millimetres Key 1 temperature sensing element 2 protective sheath 3 sealing ring 4 ejection device A: 15 mm B: = 27,5 mm or = 38 mm or 60 mm Figure 1 Temperature probes type DS 4.2.4 Dimensions of direct mounted long probes -
39、Type DL The dimensions shall be as given in Figure 2. Further information is given in Annex A, Figures A.2 and A.3. The qualifying immersion depth shall be 50 % of the length B or less if so specified by the manufacturer. DINEN 1434-2:2016-02EN 1434-2:2015(E)8 Dimensions in millimetres Key 1 tempera
40、ture sensing element 4 outline of head probe 2 protective sheath 5 outline of permanently connected signal lead probe 3 sealing surface 6 inlet for signal cable 9 mm G B thread in accordance with EN ISO 228-1 A: 30 mm or 50 mm for Pt1000 Alternative lengths B C (head probe only) 85 105 120 140 210 2
41、30 Figure 2 Temperature probes type DL (head or cable) 4.2.5 Dimensions of pocket mounted long probes - Type PL The dimensions shall be as given in Figure 3. Further information is given in Annex A, Figures A.4 and A.5. The qualifying immersion depth shall be 50 % of the length B for the shortest po
42、cket specified or less if so specified by the manufacturer. 4.2.6 Dimensions of temperature pocket The temperature pocket is designed for use with type PL temperature probes only. It is designed to be capable of being inserted through a pipe wall to which has been externally brazed or welded a boss
43、(see Annex A, Figure A.9) and in this respect only, it is interchangeable with a direct mounted long probe of corresponding insertion length. The dimensions shall be as given in Figure 4. DIN EN 1434-2:2016-02 EN 1434-2:2015 (E) 9 Dimensions in millimetres Key A 30 mm or 50 mm for Pt 1000 Alternativ
44、e lengths B (head probe only) 105 140 230 1 temperature sensing element 3 outline of permanently connected signal lead probe 2 outline of head probe 4 inlet for signal cable 9 mm Corresponding to c11 in EN ISO 286-2, rounded to 2 decimals Figure 3 Temperature probes - Type PL (head or cable) DIN EN
45、1434-2:2016-02 EN 1434-2:2015 (E) 10 Dimensions in millimetres Key 1 sealing face 2 probe clamping screw with provision for security sealing a Corresponding to H11 in EN ISO 286-2 rounded to 2 decimals G B thread in accordance with EN ISO 228-1 Alternative lengths C D 85 100 120 135 210 225 Figure 4
46、 Temperature pocket 4.2.7 Design of short probes with respect to installation The sensor shall be mounted perpendicular to the flow and with the sensing element inserted to at least the centre of the pipe. For internal pressures up to 16 bar, the sensor shall be designed to fit in a pipe fitting (se
47、e Annex A, Figure A.7). 4.2.8 Design of long probes with respect to installation The sensor shall be mounted with the sensing element inserted to at least the centre of the pipe. DIN EN 1434-2:2016-02 EN 1434-2:2015 (E) 11 The sensor shall be designed to fit in the following types of installation, (
48、for internal pressures up to PN 16): a) in a pipe DN 50 mounted with the tip pointing into the flow in a bend (see Annex A, Figure A.11 b), using welded-in boss (see Annex A, Figure A.9). b) in a pipe DN 50 mounted at an angle 45 to the direction of the flow with the tip pointing into the flow (see
49、Annex A, Figure A.11 c), using a welded-in boss (see Annex A, Figure A.9). c) in a pipe DN 65 to DN 250, mounted perpendicular to the flow (see Annex A, Figure A.11 d), using a welded-in boss (see Annex A, Figure A.9). 4.3 Platinum temperature sensor 4.3.1 Specialized definitions for 2 wire temperature probes Key R1temperature sensing element resistance 1 temperature sensing element R2
