EN 1434-1:2015+A1:2018

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Thermische Energiemessgeräte - Teil 1: Allgemeine AnforderungenCompteurs d'énergie thermique - Partie 1 : Prescriptions généralesThermal energy meters - Part 1: General requirements17.200.10Toplota. KalorimetrijaHeat. CalorimetryICS:Ta slovenski standard je istoveten z:EN 1434-1:2015+A1:2018SIST EN 1434-1:2016+A1:2019en,fr,de01-marec-2019SIST EN 1434-1:2016+A1:2019SLOVENSKI
STANDARDSIST EN 1434-1:20161DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1434-1:2015+A1
November
t r s z ICS
s yä t r rä s r English Version
Thermal energy meters æ Part
sã General requirements Compteurs d 5énergie thermique æ Partie
s ã Prescriptions générales
Wärmezähler æ Teil
sã Allgemeine Anforderungen This European Standard was approved by CEN on
w September
t r s w and includes Amendment
s approved by CEN on
s z July
t r s zä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels
t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s v u væ sã t r s w ªA sã t r s z ESIST EN 1434-1:2016+A1:2019

Heat coefficient equations . 30 Annex B (normative)
Flow conditioner package . 32 Annex C (normative)
Fast response meters . 34 Annex ZA (informative)
Relationship between this European Standard and the essential requirements of Directive 2014/32/EU aimed to be covered . 35 Bibliography . 38
1) EN 1434-3 is maintained by CEN/TC 294.
A true value is the heat coefficient according to Annex A. 3.13 meter model different sizes of !thermal energy 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 element 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 to entry: The conditions to define the qualified immersion depth are written in !EN 1434-4:2015+A1:2018, 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 immersion depth in a water bath, having a mean water velocity of 0,1 m/s 3.18 !thermal energy meters" 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 SIST EN 1434-1:2016+A1:2019

up to 20 K 3.19.2 bifunctional meters for change-over systems between heating and cooling instrument measuring heating and cooling 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 the 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 temperature values for hc for 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 SIST EN 1434-1:2016+A1:2019

10/20/50/100/200
Tolerance at average current 5,4 V to 6,6 V 3,4 V to 3,8 V 2,8 V to 3,3 V Peak current 100 mA 10 mA 5 mA Min. voltage at peak current 5,4 V 3,2 V 2,7 V 6.6 Qualifying immersion depth of a temperature sensor By immersion beyond the qualifying immersion depth the resistance shall not change by more than what correspond to 0,1 K. 6.7 The influence on a temperature sensor pair caused by mounting in pockets The difference in measuring result with and without specified pockets shall be within 1/2 of the MPE. 6.8 Reproducibility The application of the same meter (or sub-assembly) in a different location or by a different user, all other conditions being the same, shall result in the close agreement of successive measurements. The difference between the measurement results shall be small when compared with the maximum permissible error. SIST EN 1434-1:2016+A1:2019

7 Specified working range 7.1 General The working parameters of the !thermal energy meter" are bounded by the limiting values of the temperature range, the temperature difference, the thermal power and the flow rates (qs and qi). If the measurement of heat is affected by the pressure and/or the differential pressure between inlet and outlet of the heat-conveying liquid, pressure and differential pressure shall be regarded as parameters. 7.2 Temperature difference The ratio of the upper and lower limits of the temperature difference shall not be less than 10, with the exception of !thermal energy meters" intended
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