EN 17694-1:2023

Hydrometry - Minimum performance requirements and test procedures for water monitoring equipment - Devices for the determination of flow - Part 1: Open channel instrumentation

This document specifies general requirements, minimum performance requirements and test procedures for open channel instrumentation used to determine either volumetric flow-rate and/or total volume passed of waters in artificial open channels. It covers the following technology categories:
- Level sensors with associated electronics designed to be used with a conventional gauging structure. (The requirements and test procedures for gauging structures, such as weirs and flumes, are excluded. The stage discharge characteristics for many of these structures are established and published in national and international standards).
- Water velocity sensors.
- Integrated velocity area instruments comprising level and velocity sensors that may be separate or combined in a single assembly.
- Velocity sensors that determine the mean water velocity through a channel.
It is recognized that for some OCIs, certain tests cannot be carried out.

Hydrometrie - Mindestleistungsanforderungen und Prüfverfahren für Wasserüberwachungsgeräte - Geräte zur Bestimmung des Durchflusses - Teil 1: Messgeräte für offenes Gerinne

Dieses Dokument legt allgemeine Anforderungen, Mindest-Leistungsanforderungen und Prüfverfahren für Messgeräte für offene Gerinne fest, die für die Bestimmung des Volumenstroms und/oder des Gesamtdurchflussvolumens von Wasser in künstlichen offenen Gerinnen verwendet werden. Es behandelt die folgenden technischen Kategorien:
—   Wasserstandssensoren mit zugehöriger Elektronik, die für die Verwendung mit herkömmlichen Pegelbauwerken ausgelegt sind. (Die Anforderungen und Prüfverfahren für Pegelbauwerke wie etwa Wehre und Messgerinne sind ausgeschlossen. Die Durchflusskurven für zahlreiche dieser Bauwerke sind in nationalen und internationalen Normen festgelegt und veröffentlicht.)
—   Fließgeschwindigkeitssensoren für Wasser.
—   Integrierte Flächengeschwindigkeitsmessgeräte mit Wasserstands- und Fließgeschwindigkeitssensoren, die voneinander getrennt oder in einer Baugruppe zusammengefasst sein dürfen.
—   Fließgeschwindigkeitssensoren, die die mittlere Fließgeschwindigkeit des Wassers durch ein Gerinne bestimmen.
Es ist bekannt, dass bestimmte Prüfungen für einige OCIs nicht durchgeführt werden können.

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 1 : Instruments de mesure pour écoulements à surface libre

Le présent document spécifie les exigences générales, les exigences minimales de performance et les modes opératoires d'essai applicables aux instruments de mesure pour écoulements à surface libre utilisés pour déterminer le débit volumétrique et/ou le volume total écoulé des eaux dans les canaux artificiels à surface libre. Il couvre les catégories technologiques suivantes :
- les capteurs de niveau avec électronique associée, conçus pour être utilisés avec une structure hydrométrique conventionnelle. (Les exigences et les modes opératoires d'essai applicables aux structures hydrométriques, telles que les déversoirs et les canaux jaugeurs, sont exclus. Les caractéristiques hauteur-débit de bon nombre de ces structures sont établies et publiées dans des normes nationales et internationales) ;
- les capteurs de vitesse d'écoulement ;
- il s'agit d'instruments intégrés d'exploration du champ des vitesses comportant des capteurs de niveau et des capteurs de vitesse, qui peuvent être séparés ou combinés en un seul ensemble ;
- les capteurs de vitesse qui déterminent la vitesse moyenne de l'eau dans un canal.
Il est reconnu que certains essais ne peuvent pas être effectués sur certains OCI.

Hidrometrija - Minimalne zahteve za tehnične lastnosti in preskusni postopki za opremo za nadzor vode - Naprave za ugotavljanje pretoka - 1. del: Instrumenti z odprtim kanalom

Ta evropski standard določa splošne zahteve, minimalne zahteve glede zmogljivosti in preskusne postopke za instrumente z odprtim kanalom, ki se uporabljajo za določanje stopnje volumetričnega pretoka in/ali celotne količine pretoka vode v umetno odprtih kanalih. Zajema naslednje tehnološke kategorije:
− senzorje ravni s povezano elektroniko, ki so zasnovani za uporabo s standardno merilno konstrukcijo (npr. jez ali kanal, za katerega so določene karakteristike stopenjskega izpusta in objavljene v nacionalnem ali mednarodnem standardu) ali senzor hitrosti pretoka;
− vgrajene območne naprave za ugotavljanje pretoka, ki vključujejo senzorje ravni in hitrosti, ki so lahko ločeni ali povezani v en sklop;
− senzorje hitrosti, ki določajo povprečno hitrost pretoka vode skozi kanal.
Znano je, da nekaterih preskusov instrumentov z odprtim vodom (OCI) ni mogoče izvesti.

General Information

• Status: Published
• Publication Date: 09-May-2023
• ICS: 07.060 - Geology. Meteorology. Hydrology
• 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 17694-1:2023 - Hydrometry - Minimum performance requirements and test procedures for water monitoring equipment - Devices for the determination of flow - Part 1: Open channel 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 - 1. del: Instrumenti z
odprtim kanalom
Hydrometry - Minimum performance requirements and test procedures for water
monitoring equipment - Devices for the determination of flow - Part 1: Open channel
instrumentation
Hydrometrie - Leistungsanforderungen und Prüfverfahren für
Wasserüberwachungsgeräte - Geräte zur Bestimmung des Durchflusses - Teil 1:
Messgeräte für offenes Gerinne
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
1 : Instruments de mesure pour écoulements à surface libre
Ta slovenski standard je istoveten z: EN 17694-1:2023
ICS:
07.060 Geologija. Meteorologija. Geology. Meteorology.
Hidrologija Hydrology
17.120.20 Pretok v odprtih kanalih Flow in open channels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17694-1
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2023
EUROPÄISCHE NORM
ICS 07.060; 17.120.20
English Version
Hydrometry - Minimum performance requirements and
test procedures for water monitoring equipment - Devices
for the determination of flow - Part 1: Open channel
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 1: Messgeräte
l'écoulement - Partie 1 : Instruments de mesure pour für offenes Gerinne
écoulements à surface libre
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 17694-1:2023 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 open channel 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 Computational accuracy . 15
7.4 Data retention . 15
7.5 Environmental requirements . 15
7.6 Water temperature requirements . 16
7.7 Installation influences. 16
7.8 Field test requirements . 16
8 Testing . 16
8.1 General requirements for testing . 16
8.2 Laboratory test conditions . 17
8.3 Reporting . 18
9 Laboratory test procedures . 18
9.1 Guidance for establishing a test plan . 18
9.2 Verification by inspection . 19
9.3 Performance tests . 20
9.3.1 Loss of power for electronic OCIs . 20
9.3.2 Bias and repeatability . 20
9.3.3 Supply voltage . 20
9.3.4 Output impedance . 21
9.3.5 Water temperature . 21
9.3.6 Ambient air temperature and relative humidity . 21
9.3.7 Direct solar radiation . 23
9.3.8 Sensor location . 24
9.3.9 Incident light . 24
9.3.10 Accuracy of computation . 25
9.3.11 Effect of channel size . 26
9.3.12 Response time . 26
10 Field test procedures . 27
10.1 Objectives of field test . 27
10.2 Field test plan . 27
10.3 Field test requirements . 27
10.4 Error under field test conditions . 28
10.5 Up-time . 28
10.6 Maintenance . 29
Annex A (normative) Evaluation of test data . 30
A.1 Introduction . 30
A.2 Bias . 30
A.3 Repeatability . 31
A.4 Effect of influence quantities . 31
A.5 Combined performance requirement . 31
A.6 Worked example – Laboratory tests . 33
A.6.1 Bias . 33
A.6.2 Repeatability . 34
A.6.3 Influence conditions . 34
A.7 Worked example - Field tests . 35
Annex B (informative) Reference methods . 39
B.1 Laboratory methods . 39
B.2 Field (in situ) methods . 39
Annex C (informative) Reference uncertainty and error calculation . 41
Annex D (informative) Example report format . 43
Bibliography . 46

European foreword
This document (EN 17694-1:2023) 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 procedures for water
monitoring equipment — Devices for the determination of flow — Part 1: Open channel instrumentation
— EN 17694-2, Hydrometry — Minimum performance requirements and test procedures for water
monitoring equipment — Devices for the determination of flow — Part 2: Closed conduit
instrumentation
Any feedback and questions on this document should be directed to th
...