EN 1434-2:1997/A1:2002
(Amendment)Heat meters - Part 2: Constructional requirements
Heat meters - Part 2: Constructional requirements
Migrated from Progress Sheet (TC Comment) (2000-07-10): Technical problems have delayed the work for already more than 6 months ++ (BP note - 99-05-20) ++ Delay due to technical/political problems (BP note) ++ Res. 46 : approved to become amendment instead of revision (MB/991020)
Wärmezähler - Teil 2: Anforderungen an die Konstruktion
Diese Europäische Norm gilt für Wärmezähler, d. h. für Geräte, die dazu dienen, die in einem Wärmetauscher-Kreislauf mittels eines Wärmeträgermediums ausgetauschte thermische Energie zu messen. Der Wärmezähler zeigt die Wärmemenge in gesetzlichen Einheiten an.
Elektrische Sicherheitsanforderungen werden in dieser Norm nicht behandelt.
Den Druck betreffende Sicherheitsanforderungen werden in dieser Norm nicht behandelt.
Wärmezähler mit Oberflächen-Temperaturfühlern werden in dieser Norm nicht behandelt.
Teil 1 beschreibt allgemeine Anforderungen.
Compteurs d'énergie thermique - Partie 2: Exigences de fabrication
La présente Norme européenne s'applique aux compteurs d'énergie thermique, à savoir aux instruments destinés à mesurer l'énergie qui, dans un circuit d'échange thermique, est absorbée ou cédée par un liquide appelé liquide caloporteur. Le compteur d'énergie thermique indique la quantité d'énergie en unités légales.
La présente norme ne traite pas des prescriptions relatives à la sécurité électrique.
Elle ne traite pas des prescriptions relatives à la sécurité de pression.
Elle ne traite pas des sondes montées en surface.
La partie 1 spécifie les prescriptions générales.
Toplotni števci - 2. del: Konstrukcijske zahteve
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 1434-2:1997/A1:2002
01-november-2002
Toplotni števci - 2. del: Konstrukcijske zahteve
Heat meters - Part 2: Constructional requirements
Wärmezähler - Teil 2: Anforderungen an die Konstruktion
Compteurs d'énergie thermique - Partie 2: Exigences de fabrication
Ta slovenski standard je istoveten z: EN 1434-2:1997/A1:2002
ICS:
17.200.10 Toplota. Kalorimetrija Heat. Calorimetry
SIST EN 1434-2:1997/A1:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 1434-2:1997/A1:2002
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SIST EN 1434-2:1997/A1:2002
EUROPEAN STANDARD
EN 1434-2:1997/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2002
ICS 17.200.10
English version
Heat meters - Part 2: Constructional requirements
Compteurs d'énergie thermique - Partie 2: Prescriptions de Wärmezähler - Teil 2: Anforderungen an die Konstruktion
fabrication
This amendment A1 modifies the European Standard EN 1434-2:1997; it was approved by CEN on 1 July 2002.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this
amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references concerning such
national standards may be obtained on application to the Management Centre or to any CEN member.
This amendment 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 Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1434-2:1997/A1:2002 E
worldwide for CEN national Members.
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SIST EN 1434-2:1997/A1:2002
EN 1434-2:1997/A1:2002 (E)
Contents
page
Foreword.3
Introduction .4
1 New clauses .4
2 Amended clauses .6
2
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SIST EN 1434-2:1997/A1:2002
EN 1434-2:1997/A1:2002 (E)
Foreword
This document (EN 1434-2:1997/A1:2002) has been prepared by Technical Committee CEN/TC 176 "Heat
meters", the secretariat of which is held by DS.
This Amendment to the 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 March 2003, and conflicting national standards shall be
withdrawn at the latest by March 2003.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this Amendment to the European Standard: Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway,
Portugal, Spain, Sweden, Switzerland and the United Kingdom.
3
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SIST EN 1434-2:1997/A1:2002
EN 1434-2:1997/A1:2002 (E)
Introduction
This amendment to EN 1434-2 is divided into 2 main areas. The first being the new clauses – i.e. clauses which are
not present in the 1997 version. The second being the amended clauses, where the entire clause – not only the
changes – is presented.
It has been prepared in such a way that it can be cut and pasted into the old version.
A new descriptor has been added: cooling meters.
1 New clauses
5.6 24 hours interruption in supply voltage
The calculator shall be able to handle interruptions in the supply voltage for periods of up to 24 hours, without a
change more than one digit in the energy display.
NEW ANNEX C
Annex C
(informative)
Low voltage Power Supply for heat meters and their sub-assemblies
C.1 Remote Supply
C.1.1 Voltage (DC or AC)
Recommended nominal levels 24 V
Tolerance DC: 18 V to 41 V
If the remote supply lines are also used for data transmission
(e.g. M-Bus, see EN 1434-3) these values shall be maintained
during any data transmission.
Tolerance AC: 30 %
C.1.2 Current available
Peak value to be specified by the supplier
Long term mean value to be specified by the supplier
Total available energy to be specified by the supplier
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SIST EN 1434-2:1997/A1:2002
EN 1434-2:1997/A1:2002 (E)
C.1.3 Cabling requirements
Max. cable length >10 m - restricted only by voltage drop
Shielded cable a possible requirement to be specified by the supplier
Twisted cable a possible requirement to be specified by the supplier
C.2 Local external DC supply
C.2.1 Voltage
Recommended nominal levels 6 V, 3,6 V, 3 V
C.2.2 Other Data
Table C1 - Standardized levels for external powering
Nominal voltage 6 V 3,6 V 3 V
Max. average current 100 mA
10/20/50/100/200 A 10/20/50/100/200 A
Tolerance
...
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