EN 17694-2:2023

Hydrometry - Minimum performance requirements and test procedures for water monitoring equipment - Devices for the determination of flow - Part 2: Closed conduit instrumentation

This document specifies general requirements, minimum performance requirements and test procedures for instrumentation used to measure either volumetric flow-rate and/or total volume passed of water in closed conduits. It covers all closed conduit instrument (CCI) technologies intended to operate in closed pressurized pipes and partially filled pipes. Requirements are expressed in volumetric units which may be converted to mass using the density of the water.
It is recognized that for some CCIs certain tests cannot be carried out.
The data obtained from the testing of CCIs in accordance with the requirements of the Measuring Instruments Directive [1] or EN ISO 4064-1 [2] can be used to meet, in part, the requirements specified in this document. However, for the avoidance of doubt, compliance with the requirements of this document does not equate to compliance with the requirements of the Measuring Instruments Directive or EN ISO 4064-1.

Hydrometrie - Mindestleistungsanforderungen und Prüfverfahren für Wasserüberwachungsgeräte - Geräte zur Bestimmung des Durchflusses - Teil 2: Messgeräte für geschlossene Rohrleitungen

Dieses Dokument legt allgemeine Anforderungen, Mindest-Leistungsanforderungen und Prüfverfahren für Messgeräte fest, die für die Messung des Volumenstroms und/oder des Gesamtdurchflussvolumens von Wasser in geschlossenen Rohrleitungen verwendet werden. Es deckt alle Technologien für Messgeräte für geschlossene Rohrleitungen (CCIs) ab, die für den Betrieb in geschlossenen Druckleitungen und teilgefüllten Rohren vorgesehen sind. Die Anforderungen werden als Volumeneinheiten angegeben, die anhand der Dichte des Wassers in eine Masse umgerechnet werden dürfen.
Es ist bekannt, dass bestimmte Prüfungen für einige CCIs nicht durchgeführt werden können.
Die bei der Prüfung von CCIs in Übereinstimmung mit den Anforderungen der Messgeräterichtlinie [1] oder den Anforderungen nach EN ISO 4064 1 [2] gewonnenen Daten können teilweise verwendet werden, um die Einhaltung der in diesem Dokument festgelegten Anforderungen nachzuweisen. Zur Klarstellung wird jedoch darauf hingewiesen, dass die Einhaltung der Anforderungen dieses Dokuments nicht mit der Einhaltung der Anforderungen der Messgeräterichtlinie oder der Anforderungen nach EN ISO 4064 1 gleichgesetzt werden kann.

Hydrométrie - Exigences minimales de performance et modes opératoires d'essai pour les équipements de surveillance de l'eau - Dispositifs de mesure de l'écoulement - Partie 2 : Instruments de mesure pour écoulements en conduite fermée

Le présent document spécifie les exigences générales, les exigences minimales de performance et les modes opératoires d'essai applicables aux instruments utilisés pour mesurer le débit volumétrique et/ou le volume total passé d'eau dans les conduites fermées. Il couvre toutes les technologies d'instruments de mesure pour écoulements en conduite fermée (CCI) destinées à fonctionner dans des tuyaux sous pression fermés et des tuyaux partiellement remplis. Les exigences sont exprimées en unités volumétriques qui peuvent être converties en masse à l'aide de la densité de l'eau.
Il est reconnu que certains essais ne peuvent pas être effectués sur certains CCI.
Les données obtenues à partir des essais des CCI conformément aux exigences de la Directive Instruments de mesure [1] ou de l'EN ISO 4064-1 [2] peuvent être utilisées pour répondre, en partie, aux exigences spécifiées dans le présent document. Toutefois, pour éviter tout doute, le respect des exigences du présent document n'équivaut pas au respect des exigences de la Directive Instruments de mesure ou de l'EN ISO 4064-1.

Hidrometrija - Minimalne zahteve za tehnične lastnosti in preskusni postopki za opremo za nadzor vode - Naprave za ugotavljanje pretoka - 2. del: Instrumenti za merjenje v zaprtem vodu

Ta evropski standard določa splošne zahteve, minimalne zahteve glede zmogljivosti in preskusne postopke za instrumente, ki se uporabljajo za merjenje stopnje volumetričnega pretoka in/ali celotne količine pretoka vode v umetno zaprtih vodih. Zajema vse tehnologije instrumentov za merjenje v zaprtem vodu (CCI), ki so namenjene za delovanje v zaprtih ceveh pod tlakom in delno napolnjenih ceveh.
Znano je, da nekaterih preskusov instrumentov za merjenje v zaprtem vodu ni mogoče izvesti.
Podatke, pridobljene pri preskušanju instrumentov za merjenje v zaprtem vodu v skladu z zahtevami Direktive o merilnih instrumentih [4] ali standarda ISO 4064-1 [5], je mogoče deloma uporabiti za izpolnjevanje zahtev, določenih v tem evropskem standardu. V izogib dvomom skladnost z zahtevami tega evropskega standarda ni enaka skladnosti z zahtevami Direktive o merilnih instrumentih ali standarda ISO 4064-1.

General Information

• Status: Published
• Publication Date: 09-May-2023
• ICS: 07.060 - Geology. Meteorology. Hydrology
• ICS: 17.120.10 - Flow in closed conduits
• ICS: 17.120.20 - Flow in open channels
• Technical Committee: CEN/TC 318 - Hydrometry
• Drafting Committee: CEN/TC 318 - Hydrometry
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 10-May-2023
• Due Date: 05-Aug-2022
• Completion Date: 10-May-2023
• Directive: 2000/60/EC - Directive 2000/60/EC of the European Parliament and of the Council of 23 October 2000 establishing a framework for Community action in the field of water policy (substitutes Directive Reference 01/991 - Common Position on WFD)
• Ref Project: SIST EN 17694-2:2023 - Hydrometry - Minimum performance requirements and test procedures for water monitoring equipment - Devices for the determination of flow - Part 2: Closed conduit instrumentation

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2023
Hidrometrija - Minimalne zahteve za tehnične lastnosti in preskusni postopki za
opremo za nadzor vode - Naprave za ugotavljanje pretoka - 2. del: Instrumenti za
merjenje v zaprtem vodu
Hydrometry - Minimum performance requirements and test procedures for water
monitoring equipment - Devices for the determination of flow - Part 2: Closed conduit
instrumentation
Hydrometrie - Leistungsanforderungen und Prüfverfahren für
Wasserüberwachungsgeräte - Geräte zur Bestimmung des Durchflusses - Teil 2:
Messgeräte für geschlossene Rohrleitungen
Hydrométrie - Exigences minimales de performance et modes opératoires d'essai pour
les équipements de surveillance de l'eau - Dispositifs de mesure de l'écoulement - Partie
2 : Instruments de mesure pour écoulements en conduite fermée
Ta slovenski standard je istoveten z: EN 17694-2:2023
ICS:
07.060 Geologija. Meteorologija. Geology. Meteorology.
Hidrologija Hydrology
17.120.10 Pretok v zaprtih vodih Flow in closed conduits
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17694-2
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2023
EUROPÄISCHE NORM
ICS 17.120.10
English Version
Hydrometry - Minimum performance requirements and
test procedures for water monitoring equipment - Devices
for the determination of flow - Part 2: Closed conduit
instrumentation
Hydrométrie - Exigences minimales de performance et Hydrometrie - Leistungsanforderungen und
modes opératoires d'essai pour les équipements de Prüfverfahren für Wasserüberwachungsgeräte - Geräte
surveillance de l'eau - Dispositifs de mesure de zur Bestimmung des Durchflusses - Teil 2: Messgeräte
l'écoulement - Partie 2 : Instruments de mesure pour für geschlossene Rohrleitungen
écoulements en conduite fermée
This European Standard was approved by CEN on 13 February 2023.

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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17694-2:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Symbols . 8
5 Principle . 9
6 General requirements . 10
6.1 Requirements for closed conduit instrumentation . 10
6.2 Requirements for associated documentation . 11
7 Performance requirements . 12
7.1 Expression of performance requirements . 12
7.2 Performance requirements . 13
7.3 Data retention . 14
7.4 Environmental requirements . 14
7.5 Water temperature requirements . 14
7.6 Installation influences . 14
7.7 Field test requirements . 14
8 Testing . 15
8.1 General requirements for testing . 15
8.2 Laboratory test conditions . 15
8.3 Reporting . 17
9 Laboratory test procedures . 17
9.1 Guidance for establishing a test plan . 17
9.2 Verification by inspection . 20
9.3 Performance tests . 20
9.3.1 Loss of power for electronic CCIs . 20
9.3.2 Bias and repeatability . 20
9.3.3 Supply voltage . 21
9.3.4 Output impedance . 22
9.3.5 Water temperature . 22
9.3.6 Ambient air temperature and relative humidity . 22
9.3.7 Sensor location . 23
9.3.8 Presence of stray currents . 24
9.3.9 Bi-directional flow . 25
9.3.10 Flow reversal . 25
9.3.11 Ancillary devices . 25
9.3.12 Effect of conduit material . 26
9.3.13 Effect of conduit size . 26
9.3.14 Fill level. 27
9.3.15 Response time . 27
10 Field test procedures . 28
10.1 Objective of field test . 28
10.2 Field test plan . 28
10.3 Field test requirements . 28
10.4 Error under field test conditions . 29
10.5 Up-time . 29
10.6 Maintenance . 30
Annex A (normative) Evaluation of test data . 31
A.1 Introduction . 31
A.2 Bias. 31
A.3 Repeatability . 32
A.4 Effect of influence quantities . 32
A.5 Combined performance requirement . 32
A.6 Worked example . 34
A.6.1 Bias. 34
A.6.2 Repeatability . 35
A.6.3 Influence conditions . 35
A.7 Worked example — Field tests . 36
Annex B (informative)  Reference methods . 40
B.1 Laboratory methods . 40
B.2 Field (in situ) methods . 40
Annex C (informative) Reference uncertainty and error calculations . 41
Annex D (informative) Example report format . 43
Bibliography . 46

European foreword
This document (EN 17694-2:2023) has been prepared by Technical Committee CEN/TC 318
“Hydrometry”, the secretariat of which is held by BSI.
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 November 2023, and conflicting national standards shall
be withdrawn at the latest by November 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 standard is published in two parts:
— EN 17694-1, Hydrometry — Minimum performance requirements and test procedu
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