Thermal energy meters - Part 5: Initial verification tests

This document specifies initial verification tests for thermal energy meters. Thermal energy 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 thermal energy meter indicates the quantity of thermal energy in legal units.
Electrical safety requirements are not covered by this document.
Pressure safety requirements are not covered by this document.
Surface mounted temperature sensors are not covered by this document.
This document covers meters for closed systems only, where the differential pressure over the thermal load is limited.

Thermische Energiemessgeräte - Teil 5: Tests für Konformitätsuntersuchungen und Eichungen

Dieses Dokument legt Ersteichungen für thermische Energiemessgeräte fest. Thermische Energiemessgeräte sind Messgeräte, die dazu bestimmt sind, die Energie zu messen, die in einem Wärmetauschkreislauf von einer als Wärmeträgerflüssigkeit bezeichneten Flüssigkeit aufgenommen (Kühlung) oder abgegeben (Heizung) wird. Das thermische Energiemessgerät zeigt die Menge der thermischen Energie in gesetzlichen Einheiten an.
Anforderungen an die elektrische Sicherheit sind nicht Gegenstand dieses Dokuments.
Anforderungen an die Drucksicherheit sind nicht Gegenstand dieses Dokuments.
Oberflächenmontierte Temperaturfühlern sind nicht Gegenstand dieses Dokuments.
Dieses Dokument behandelt nur Messgeräte für geschlossene Systeme, bei denen der Differenzdruck über die thermische Last begrenzt ist.

Compteurs d'énergie thermique - Partie 5 : Essais de vérification initiaux

Le présent document spécifie les essais de vérification primitive pour les compteurs d’énergie thermique. Les compteurs d’énergie thermique sont des instruments destinés à mesurer l’énergie thermique qui, dans un circuit d’échange thermique, est absorbée (refroidissement) ou cédée (chauffage) par un liquide appelé « liquide caloporteur ». Le compteur d’énergie thermique fournit la quantité d’énergie thermique en unités de mesure légales.
Le présent document couvre les compteurs pour les systèmes fermés uniquement, où la pression différentielle dans la charge thermique est limitée.
Le présent document ne s’applique pas :
-   aux prescriptions de sécurité électrique ;
-   aux prescriptions de sécurité relatives à la pression ; ni
-   aux sondes de température montées en surface.

Merilniki toplote - 5. del: Preskusi prve overitve

General Information

Status
Published
Public Enquiry End Date
30-Nov-2020
Publication Date
18-Sep-2022
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
14-Sep-2022
Due Date
19-Nov-2022
Completion Date
19-Sep-2022

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SLOVENSKI STANDARD
SIST EN 1434-5:2022
01-november-2022
Nadomešča:
SIST EN 1434-5:2016+A1:2019
Merilniki toplote - 5. del: Preskusi prve overitve
Thermal energy meters - Part 5: Initial verification tests
Thermische Energiemessgeräte - Teil 5: Tests für Konformitätsuntersuchungen und
Eichungen
Compteurs d'énergie thermique - Partie 5 : Essais de vérification initiaux
Ta slovenski standard je istoveten z: EN 1434-5:2022
ICS:
17.200.20 Instrumenti za merjenje Temperature-measuring
temperature instruments
SIST EN 1434-5:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 1434-5:2022
---------------------- Page: 2 ----------------------
SIST EN 1434-5:2022
EN 1434-5
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2022
EUROPÄISCHE NORM
ICS 17.200.20 Supersedes EN 1434-5:2015+A1:2019
English Version
Thermal energy meters - Part 5: Initial verification tests

Compteurs d'énergie thermique - Partie 5 : Essais de Thermische Energiemessgeräte - Teil 5: Tests für

vérification primitive Konformitätsuntersuchungen und Eichungen
This European Standard was approved by CEN on 17 July 2022.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations 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

member.

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.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1434-5:2022 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 1434-5:2022
EN 1434-5:2022 (E)
Contents Page

European foreword ...................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 5

4 General................................................................................................................................................................ 5

5 Uncertainty of test equipment ................................................................................................................... 6

6 Tests to be carried out .................................................................................................................................. 6

6.1 General................................................................................................................................................................ 6

6.2 Flow sensors ..................................................................................................................................................... 7

6.3 Temperature sensor pair ............................................................................................................................. 7

6.3.1 Error in temperature difference ............................................................................................................... 7

6.3.2 Insulation resistance ..................................................................................................................................... 8

6.3.3 Single temperature sensor for smart metering applications ......................................................... 8

6.4 Calculator ........................................................................................................................................................... 8

6.5 Calculator and temperature sensor pair ................................................................................................ 9

6.5.1 Heating and cooling applications .............................................................................................................. 9

6.5.2 Calculator with single temperature sensor for smart metering applications .......................... 9

6.6 Combined thermal energy meter .............................................................................................................. 9

6.7 Complete meter ............................................................................................................................................... 9

6.8 Meters for heat-conveying liquids other than water ....................................................................... 10

6.8.1 Flow sensor ..................................................................................................................................................... 10

6.8.2 Temperature sensor pair ........................................................................................................................... 10

6.8.3 Calculator ......................................................................................................................................................... 10

7 Documentation to be supplied ................................................................................................................. 11

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2014/32/EU aimed to be covered ...................................................... 12

Bibliography ................................................................................................................................................................. 13

---------------------- Page: 4 ----------------------
SIST EN 1434-5:2022
EN 1434-5:2022 (E)
European foreword

This document (EN 1434-5:2022) has been prepared by Technical Committee CEN/TC 176 “Thermal

energy 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 March 2023, and conflicting national standards shall

be withdrawn at the latest by March 2023.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 1434-5:2015+A1:2019.
EN 1434, Thermal energy meters, consists of the following parts:
— Part 1: General requirements;
— Part 2: Constructional requirements;
— Part 3: Data exchange and interfaces ;
— Part 4: Pattern approval tests;
— Part 5: Initial verification tests;
— Part 6: Installation, commissioning, operational monitoring and maintenance.
In comparison with EN 1434-5:2015+A1:2019, the following changes have been made:

— the third calibration temperature 𝜃𝜃 for extrapolation error of sensor pairs has been changed in

Table 1;
— new subclause 6.8 has been added.

This document has been prepared under a Standardization Request given to CEN by the European

Commission and the European Free Trade Association, and supports essential requirements of EU

Directive(s) / Regulation(s).

For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral

part of this document.

Any feedback and questions on this document should be directed to the users’ national standards body.

A complete listing of these bodies can be found on the CEN website.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

EN 1434-3 is maintained by CEN/TC 294.
---------------------- Page: 5 ----------------------
SIST EN 1434-5:2022
EN 1434-5:2022 (E)

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the

United Kingdom.
---------------------- Page: 6 ----------------------
SIST EN 1434-5:2022
EN 1434-5:2022 (E)
1 Scope

This document specifies initial verification tests for thermal energy meters. Thermal energy 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 thermal energy meter indicates

the quantity of thermal energy in legal units.

This document covers meters for closed systems only, where the differential pressure over the thermal

load is limited.
This document is not applicable to:
— electrical safety requirements;
— pressure safety requirements; and
— surface mounted temperature sensors.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 1434-1:2022, Thermal energy meters — Part 1: General

EN 60751:2008, Industrial platinum resistance thermometers and platinum temperature sensors

(IEC 60751:2008)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 1434-1:2022 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
4 General

Initial verification of a measuring instrument is a series of tests and visual examinations carried out to

determine whether an instrument manufactured to replicate a given pattern conforms to that pattern

and to regulations, and that its metrological characteristics lie within the limits of the maximum

permissible errors. If the instrument passes all tests and examinations, it is given legal character by its

acceptance as evidenced by stamping and/or issuance of a certificate of verification.

NOTE The provisions of this document may also apply to the re-verification of thermal energy meters under

national law.

The instrument shall be tested under rated operating conditions at the extremes and midpoints of its

ranges.

Initial verification is divided into metrological, technical and administrative phases.

In tests of a thermal energy meter as a combined instrument, the flow sensor, the temperature sensors

and the calculator shall each be tested separately.
---------------------- Page: 7 ----------------------
SIST EN 1434-5:2022
EN 1434-5:2022 (E)

Unless otherwise stated in the certificate of pattern approval, the verification shall be carried out in

accordance with this document.

Modern thermal energy meters are mainly equipped with CMOS microprocessors with a very low

power consumption, allowing battery operation. Testing and adjusting of this type of meter needs a

completely different approach. Until now, almost every meter type needed its own test equipment to

handle the manufacturer's specific requirements. This is a very complicated and expensive way for

users of several types of meters and for initial verification institutes. The more different types of

thermal energy meters a user has installed, the more testing equipment he may need. An economical

testing of several meters should be possible and an easy adaptation to the existing test bench is of great

interest.

Since this problem came up, experts have been researching an acceptable solution to it. Details of one

example of an acceptable solution are given in “Normierter Wärmezähler Adapter” (Standardized heat

meter adapter) Version 2.0 of November 2020, AGFW Regelwerk 204, Frankfurt, Germany.

5 Uncertainty of test equipment

Standards, instruments and methods used in verification shall suit the purpose, be traceable to more

precise standards and be part of a reliable calibration programme.

The uncertainties associated with these standards, methods and measuring instruments shall always be

known. They shall either:

a) not exceed 1/5 of the MPE (maximum permissible error) of the EUT (equipment under test),

or, if exceeding 1/5 of the MPE,

b) if the uncertainty is higher than 1/5 of MPE, the value of the difference between uncertainty and

1/5 MPE shall be subtracted from MPE,
...

SLOVENSKI STANDARD
oSIST prEN 1434-5:2020
01-november-2020
Merilniki toplote - 5. del: Preskusi prve overitve
Thermal energy meters - Part 5: Initial verification tests
Thermische Energiemessgeräte - Teil 5: Tests für Konformitätsuntersuchungen und
Eichungen
Compteurs d'énergie thermique - Partie 5 : Essais de vérification initiaux
Ta slovenski standard je istoveten z: prEN 1434-5
ICS:
17.200.20 Instrumenti za merjenje Temperature-measuring
temperature instruments
oSIST prEN 1434-5:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 1434-5:2020
---------------------- Page: 2 ----------------------
oSIST prEN 1434-5:2020
DRAFT
EUROPEAN STANDARD
prEN 1434-5
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2020
ICS 17.200.20 Will supersede EN 1434-5:2015+A1:2019
English Version
Thermal energy meters - Part 5: Initial verification tests

Compteurs d'énergie thermique - Partie 5 : Essais de Thermische Energiemessgeräte - Teil 5: Tests für

vérification initiaux Konformitätsuntersuchungen und Eichungen

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 176.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations

which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN 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.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1434-5:2020 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN 1434-5:2020
prEN 1434-5:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 4

2 Normative references .................................................................................................................................... 4

3 Terms and definitions ................................................................................................................................... 4

4 General ................................................................................................................................................................ 4

5 Uncertainty of test equipment .................................................................................................................... 5

6 Tests to be carried out ................................................................................................................................... 5

6.1 General ................................................................................................................................................................ 5

6.2 Flow sensors ..................................................................................................................................................... 5

6.3 Temperature sensor pair ............................................................................................................................. 6

6.3.1 Error in temperature difference ................................................................................................................ 6

6.3.2 Insulation resistance ..................................................................................................................................... 6

6.3.3 Single temperature sensor for smart metering applications .......................................................... 7

6.4 Calculator ........................................................................................................................................................... 7

6.5 Calculator and temperature sensor pair ................................................................................................ 7

6.5.1 Heating and cooling applications .............................................................................................................. 7

6.5.2 Calculator with single temperature sensor for smart metering applications .......................... 8

6.6 Combined thermal energy meter .............................................................................................................. 8

6.7 Complete meter ............................................................................................................................................... 8

6.8 Meters for heat-conveying liquids other than water ......................................................................... 9

6.8.1 Flow sensor ....................................................................................................................................................... 9

6.8.2 Temperature sensor pair ............................................................................................................................. 9

6.8.3 Calculator ........................................................................................................................................................ 10

7 Documentation to be supplied ................................................................................................................ 10

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2014/32/EU aimed to be covered ..................................................... 11

---------------------- Page: 4 ----------------------
oSIST prEN 1434-5:2020
prEN 1434-5:2020 (E)
European foreword

This document (prEN 1434-5:2020) has been prepared by Technical Committee CEN/TC 176 “Thermal

heat meters”, the secretariat of which is held by SIS.
This document is currently submitted to the CEN Enquiry.
This document supersedes EN 1434-5:2015+A1:2019.
EN 1434, Thermal energy meters consists of the following parts:
— Part 1: General requirements
— Part 2: Constructional requirements
— Part 3: Data exchange and interfaces
— Part 4: Pattern approval tests
— Part 5: Initial verification tests
— Part 6: Installation, commissioning, operational monitoring and maintenance
In comparison to EN 1434-5:2015+A1:2019, the following changes have been made:

— the third calibration temperature Θ for extrapolation error of sensor pairs was changed in Table 1.

This document has been prepared under a standardization request 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 1434-3 is maintained by CEN/TC 294.
---------------------- Page: 5 ----------------------
oSIST prEN 1434-5:2020
prEN 1434-5:2020 (E)
1 Scope

This document specifies initial verification tests for thermal energy meters. Thermal energy 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 thermal energy meter indicates the

quantity of thermal energy in legal units.
Electrical safety requirements are not covered by this document.
Pressure safety requirements are not covered by this document.
Surface mounted temperature sensors are not covered by this document.

This document covers meters for closed systems only, where the differential pressure over the thermal

load is limited.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

prEN 1434-1:2020, Thermal energy meters — Part 1: General

EN 60751, Industrial platinum resistance thermometers and platinum temperature sensors (IEC 60751)

3 Terms and definitions

For the purposes of this document, the terms and definitions given in prEN 1434-1:2020 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
4 General

Initial verification of a measuring instrument is a series of tests and visual examinations carried out to

determine whether an instrument manufactured to replicate a given pattern conforms to that pattern

and to regulations, and that its metrological characteristics lie within the limits of the maximum

permissible errors. If the instrument passes all tests and examinations, it is given legal character by its

acceptance as evidenced by stamping and/or issuance of a certificate of verification.

The provisions of this standard also apply to the re-verification of thermal energy meters.

The instrument shall be tested under rated operating conditions at the extremes and midpoints of its

ranges.

Initial verification is divided into metrological, technical and administrative phases.

In tests of a thermal energy meter as a combined instrument, the flow sensor, the temperature sensors

and the calculator shall each be tested separately.

Unless otherwise stated in the certificate of pattern approval, the verification shall be carried out in

accordance with this standard.

Modern thermal energy meters are mainly equipped with CMOS microprocessors with a very low power

consumption, allowing battery operation. Testing and adjusting of this type of meter needs a completely

different approach. Until now, almost every meter type needed its own test equipment to handle the

---------------------- Page: 6 ----------------------
oSIST prEN 1434-5:2020
prEN 1434-5:2020 (E)

manufacturer's specific requirements. This is a very complicated and expensive way for users of several

types of meters and for initial verification institutes. The more different types of thermal energy meters

a user has installed, the more testing equipment he may need. An economical testing of several meters

should be possible and an easy adaptation to the existing test bench is of great interest.

Since this problem came up, experts have been researching an acceptable solution to it. Details of one

example of an acceptable solution are given in “Normierter Wärmezähler Adapter” (Standardized heat

meter adapter) Version 1.5 of September 2000, AGFW Merkblatt 6, Band 2, Frankfurt, Germany.

5 Uncertainty of test equipment

Standards, instruments and methods used in verification shall suit the purpose, be traceable to more

precise standards and be part of a reliable calibration programme.

The uncertainties associated with these standards, methods and measuring instruments shall always be

known. They shall either:

a) not exceed 1/5 of the MPE (maximum permissible error) of the EUT (equipment under test),

or, if exceeding 1/5 of the MPE,

b) if the uncertainty is higher than 1/5 of MPE, the value of the difference between uncertainty and 1/5

MPE shall be subtracted from MPE, to calculate a new reduced MPE.
It is recommended that option a) is used.
6 Tests to be carried out
6.1 General

If the error determined lies outside the MPE, the test shall be repeated twice. 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.
The meters shall not e
...

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