EN 1434-4:1997/A1:2002
(Amendment)Heat meters - Part 4: Pattern approval tests
Heat meters - Part 4: Pattern approval tests
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 4: Prüfungen für die Bauartzulassung
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 4: Essais en vue de l'approbation de modèle
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 - 4. del: Preskušanje za odobritev tipa
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 1434-4:1997/A1:2002
01-november-2002
Toplotni števci - 4. del: Preskušanje za odobritev tipa
Heat meters - Part 4: Pattern approval tests
Wärmezähler - Teil 4: Prüfungen für die Bauartzulassung
Compteurs d'énergie thermique - Partie 4: Essais en vue de l'approbation de modele
Ta slovenski standard je istoveten z: EN 1434-4:1997/A1:2002
ICS:
17.200.10 Toplota. Kalorimetrija Heat. Calorimetry
SIST EN 1434-4:1997/A1:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN 1434-4:1997/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2002
ICS 17.200.10
English version
Heat meters - Part 4: Pattern approval tests
Compteurs d'énergie thermique - Partie 4: Essais en vue Wärmezähler - Teil 4: Prüfungen für die Bauartzulassung
de l'approbation de modèle
This amendment A1 modifies the European Standard EN 1434-4:1997; 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 1434-4:1997/A1:2002 E
worldwide for CEN national Members.
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EN 1434-4:1997/A1:2002 (E)
Contents
page
Foreword.3
Introduction .4
1 New clauses .4
2 Amended clauses .4
2
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EN 1434-4:1997/A1:2002 (E)
Foreword
This document (EN 1434-4:1997/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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EN 1434-4:1997/A1:2002 (E)
Introduction
This amendment to EN 1434-4 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
6.19 24 hours interruption in the mains power supply voltage
The calculator shall be exposed to the following sequence:
1) Operate the calculator for 24 h at and q
max p;
2) Operate the calculator for 24 h at and zero flow;
max
3) Note the reading on the display;
4) Disconnect the mains power supply for 24 hours;
5) Re-connect the mains power supply;
6) Note the reading on the display.
Requirements: the energy displayed before and after the mains power supply interruption shall not differ by more
than the value of the least significant digit of the display.
2 Amended clauses
NEW TEXT
1 Scope
This European Standard applies to heat meters, that is to instruments intended for measuring the heat which, in
a heat-exchange circuit, is absorbed or given up 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 standard.
Pressure safety requirements are not covered by this standard.
Surface mounted sensors are not covered by this standard.
Part 1 specifies general requirements.
NEW TEXT (3 last lines added)
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EN 1434-4:1997/A1:2002 (E)
5.1 Rated operating conditions
The rated operating conditions are those given in Table 1.
Table 1 - Rated operating conditions
AB C
Environmental class
Ambient temperature in ºC + 5 to + 55 25 to +55 + 5 to + 55
Relative humidity in % < 93
+10
Mains supply voltage in V
230 %
15
Mains frequency f 2 %
nom
Battery voltage The voltage of a battery in service under normal conditions
Remote AC supply voltage
24 V 50 %
Remote DC supply voltage 12 V to 42 V
Local external DC supply voltage as specified by supplier
NEW TEXT
5.3.1 Reference values for the measurand, RVM, for q 3,5 m/h
p
Range of temperature difference: (40 2) K
0
or K if is less than 40 K
max max
-2
for heating applications
and (10 2) K for cooling applications
3
Range of flow-rate: (0,7 to 0,75) q in m /h
p
Return temperature: (50 5) C
or the upper temperature, if it is less than 50 C
The conditions mentioned above are reference values for a complete heat meter. Reference values for
sub-assemblies are the relevant parts of the above mentioned conditions.
NEW TEXT
5.3.2 Reference values for the measurand, RVM, for q > 3,5 m/h
p
Flow-rate simulation for the flow sensor electronics is allowed, but testing with water is always preferred and carried
out in accordance with 5.3.1.
If flow-rate simulation is used, the following RVM values apply:
5
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EN 1434-4:1997/A1:2002 (E)
Range of temperature differences:
For heating applications
(40 2) K
0
or K if is less than 40 K
max max
-2
For cooling applications
(10 2) K
The temperature of the liquid in the flow sensor shall be kept at (50 5) C or at ambient temperature
Range of flow-rate: (0,7 to 0,75) q
p
The power and signal wires shall be connected.
The flow sensor including flow sensor electronics shall be operated at zero flow rate (without low flow cut off
device).
NEW TEXT
6.1 General
Unless otherwise stated in the test specification, the test requirements apply irrespective of the heat meter's
environmental class. See clause 10 of EN 1434-1:1997.
All measurements shall be carried out under the installation conditions stipulated by the supplier for his type of
meter (e.g. straight sections of piping upstream and downstream of the meter). For all tests the heat conveying
liquid shall be water, unless otherwise specified.
If a temperature sensor can be installed in the flow sensor, this shall be done during the performance tests of the
flow sensor. Where a filter or strainer is an integral part of the flow sensor, it shall be included in all the tests.
If the error determined lies outside the MPE, the test shall be repeated twice unless otherwise stated. The test is
then declared satisfactory if both the arithmetic mean of the result of the three tests and at least two of the test
results are within or at the MPE.
Depending on the flow sensor size the tests and measurements to be carried out are described below:
For each meter model the test in 6.4 6.16 and 6.17 can be carried out on a limited number of sizes according to an
evaluation by the testing laboratory. This evaluation shall be included in the type testing report.
The test in 6.8 shall be carried out only for those sizes of a type for which the highest wear is expected.
For dimensions > DN 200, 6.17 shall be carried out at .
min
For each meter model the following tests shall be carried out on one size only: 6.5, 6.6, 6.7, 6.9, 6.10, 6.11, 6.12,
6.13, 6.14, 6.15 and 6.18.
NEW TEXT
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EN 1434-4:1997/A1:2002 (E)
6.2 Test program
Samples of a heat meter, or its sub-assemblies, submitted for pattern approval, shall be subject to tests to verify
their conformity with clause 4. Unless otherwise stated, the tests shall be carried out at reference conditions and
the samples shall be exposed to the influence factors or disturbances specified for the respective tests, as stated in
Table 2.
The test sequence and the number of items used, shall be either as described in Table 2 or as agreed between the
supplier and the testing laboratory (assuming four samples, numbered by the testing laboratory).
Only one influence quantity shall be applied at a time.
If the meter under test (complete, combined or sub-assemblies) has test outputs for quantity of water, temperature
difference and/or energy, these outputs can be used to test such parameters.
7
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EN 1434-4:1997/A1:2002 (E)
Table 2 - Test programme for heat meters and their sub-assemblies
Test Sub- Exposure Tempera- Flow Calcula- Compl- Sample
clause ture sensor ting dev- ete no.
sensor
pair ice meter
INFLUENCE FAC-
TORS
MPE 6.4 Performance test X X X X 2
MPE 6.5 Dry heat X(a) X X 2
MPE 6.6 Cold X(a) X X 2
MPE 6.7 Static deviations in X(a) X X 2
supply voltage
DISTURBANCES
NSFa 6.8 Durability X X X 4
NSFd 6.9 Damp heat, cyclic X(a) X X 1
NSFd 6.10 Short time reduction in X(a) X X 3
supply voltage
NSFa 6.11 Electrical transients X(a)(b) X(b) X 3
NSFd 6.12 Electromagnetic field X(a)(b) X(b) X 3
NSFa 6.13 Electrostatic discharge X(a) X X 3
NSFd 6.14 Static magnetic field X X X 3
NSFd 6.15 Electromagnetic field at X(a) X X 3
mains frequency
NSFa 6.16 Internal pressure X X 1
6.17 Pressure loss X X 1
6.18 Electromagnetic emis- X(a) X(b) X 3
sion
6.19 24 hrs interruption in X X 3
supply voltage
MPE - Maximum permissible error according to clause 9 of EN 1434-1:1996
NSFd - No significant fault shall occur during the test
NSFa - No significant fault shall occur after the test
X - Test to be performed
a - Only for flow sensors with electronic devices
b - This test shall be done with connected cables
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EN 1434-4:1997/A1:2002 (E)
NEW TEXT
6.4.1.1 General
Flow rates:
0 +10
q %
%, q 5%, q 5%, q 5% and q
1
2 3 4 5
-10 0
where
q = q and q = q , q /q = q /q = q /q = q /q = K
1 s 5 i 1 2 2 3 3 4 4 5
where
q
4 s
K
=
q
i
The test flowrate nearest to 0,7 q to 0,75 q shall be changed to be within 0,7 q to 0,75 q in order to obtain one
p p p p
point within RVM conditions.
Table 3 - Water temperatures
Applications
a)
Heating Cooling
a
to ( + 5) C (but not less than 10 C) (15 5) C
min min
b)
b
(50 5)C(5 1)C
c
(85 5)C
a)
For q /q = 25. For q /q > 25 additional testing shall be carried out at
p i p i
lower temperatures.
b)
Only for mechanical meters and if q /q > 10.
p i
The water temperature at the heat meter shall not vary by more than 2 K during a measurement.
For flow sensors larger than DN250 the test may be carried out only at the one temperature a), if the following
conditions are satisfied:
- the test results for smaller flow sensors of the same model are inside MPE for all water tempera-
tures;
- documentary evidence is given that technological similarity exists between the models tested and
the larger sizes applied for.
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EN 1434-4:1997/A1:2002 (E)
NEW TEXT
6.4.2 Calculator
The calculator shall be tested at the following simulated temperatures:
Table 4 - Testing temperatures for heating applications
Temperature Temperature difference
+5
a) = ( ) C , 5, 20, in K
return min min RVM
0
b) = ( 5) C , 5, 20, , in K
return RVM min RVM max
0
c) = ( ) C 20, , in K
flow max RVM max
-5
Table 5 - Testing temperatures for cooling applications
Temperature Temperature difference
+5
a) = ( ) C , 5, , in K
flow min min RVM max
0
b) = (15 5) C in K
flow min
0
c) = ( ) C , in K
return max RVM max
-5
The maximum temperature for these tests shall not exceed
max
Tolerances:
For all temperature differences: 20%,
+20 0
%
except for : % and :
min max
0 -20
For all test points, the simulated flow rate shall not create a signal exceeding the maximum signal acceptable by
the calculator.
NEW TEXT
6.4.3.3 General testing
The temperature sensors of a pair shall be tested without their pockets at three temperature levels from the
following scale:
(5 5) C (40 5) C (70 5) C (90 5) C (130 5) C (160 10) C
chosen to optimize the spread of temperature over the temperature range specified by the supplier.
10
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EN 1434-4:1997/A1:2002 (E)
The determined resistance values shall be used in a system of three equations to calculate the three constants of
the temperature/resistance equation of EN 60751 and a curve shall be drawn through the three test points.
Thereby the characteristic curve for the temperature sensor is known.
The "ideal" curve using the standard constants of EN 60751, shall be generated. To give the error at any
temperature, the "ideal" curve shall be subtracted from the characteristic curve for each temperature sensor.
As a further step the worst case error of the pair shall be determined over the temperature range and over the
temperature difference range specified for the temperature sensors. For return temperatures above 80 C, only
temperature differences over 10K shall be taken into account.
If the temperature sensor pair and calculator form an inseparable sub-assembly, or a complete meter is to be
approved, the test conditions for the sub-assembly or complete meter shall apply.
NEW TEXT
6.5.2 Flow sensor
Water temperature: (50 5) C for heating applications and (15 5) C for cooling applications
Flow rates
a) (1 to 1,1)q only to be carried out where q 3 m/h.
i i
b) (0,7 to 0,75)q if q > 3,5 m/h the test shall be carried out according to 5.3.2.
p p
NEW TEXT
6.6 Cold
The heat meters or their sub-assemblies shall be exposed to cold air under the test conditions in Table 6.
Reference to standard: EN 60068-2-1, Part 2: Tests.
Test Ad: cold, for heat dissipating heat meter or the sub-assemblies with gradual change of temperature.
Table 6 - Test conditions
Environmental class A B C
Temperature - C5 3 -25 35 3
Duration - h 2
The duration of the test commences after the heat meter or the sub-assemblies has reached temperature stability.
The rate of change of temperature shall not exceed 1 K/min during heating up and cooling down.
After temperature stability of the heat meter or the sub-assemblies has been attained, the tests of 6.6.1, 6.6.2 and
6.6.3 shall be carried out without exceeding the MPE.
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EN 1434-4:1997/A1:2002 (E)
NEW TEXT
6.6.2 Flow sensor
Water temperature: (50 5) C for heating applications and (15 5) C for cooling applications
Flow rates
a) (1 to 1,1)q only to be carried out where q 3 m/h.
i i
b) (0,7 to 0,75)q if q > 3,5 m/h the test shall be carried out according to 5.3.2.
p p
NEW TEXT
6.7 Static deviations in supply voltage
The heat meters or their sub-assemblies shall be subjected to static deviations from the rated supply voltage U
n
under the following test conditions:
Upper limit: U
max
Lower limit: U
min
Supply mode: defined in a), b), c), d), e) and f) below
Duration: as needed for determination of RVM conditions
The duration of each test, which shall be at normal reference conditions, shall be sufficient to determine the error of
the heat meter or the sub-assemblies.
Supply modes:
a) electronic devices for mains operation and having a single rated voltage U :
n
U =1,1 U
max n
U = 0,85 U
min n
f = f
nom
Variation of mains frequency if mains frequency is used for measuring purposes:
f = 1,02 f
max nom
f = 0,98 f
min nom
U = U
n
where f is the nominal frequency (50 Hz).
nom
b) electronic devices for
...
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