ISO 7858-1:1985

Measurement of water flow in closed conduits — Meters for cold potable water — Combination meters — Part 1: Specifications

Mesurage de débit d'eau dans les conduites fermées — Compteurs d'eau potable froide — Compteurs combinés — Partie 1: Spécifications

Merjenje pretoka vode v zaprtih vodih - Merila za hladno pitno vodo - Kombinirana merila - 1. del: Specifikacije

General Information

• Status: Withdrawn
• Publication Date: 24-Jul-1985
• Withdrawal Date: 24-Jul-1985
• ICS: 91.140.60 - Water supply systems
• Technical Committee: ISO/TC 30 - Measurement of fluid flow in closed conduits
• Drafting Committee: ISO/TC 30 - Measurement of fluid flow in closed conduits
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 16-Jul-1998
• Ref Project: SIST ISO 7858-1:1996 - Measurement of water flow in closed conduits -- Meters for cold potable water -- Combination meters -- Part 1: Specifications

Relations

• Revised: ISO 7858-1:1998 - Measurement of water flow in closed conduits — Combination meters for cold potable water — Part 1: Specifications
• Effective Date: 15-Apr-2008
• Revised: SIST ISO 7858-1:2001 - Measurement of water flow in closed conduits -- Combination meters for cold potable water -- Part 1: Specifications
• Effective Date: 12-May-2008

Standards Content (Sample)

Y-
International Standard @ 785811
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEmnY”AR OPrAHH3AUWR Il0 CTAH~APTH3AUHWORGANlSATlON INTERNATIONALE DE NORMALISATION
Measurement of water flow in closed conduits -
Meters
for cold potable water - Combination meters -
Part 1 : Specifications
Mesurage de débit d‘eau dans les conduites fermées - Compteurs d‘eau potable froide - Compteurs combinés -
Partie 1 : Spécifications
First edition - 198548-15
-
- UDC 681.121.72
Ref. No. IS0 7858/1-1985 (E)
g
Descriptors : flow measurement, water flow, pipe flow, water supply meters, specifications.
.
V
v)
-
Price based on 3 pages

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Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards bodies (IS0 member bodies). The work of preparing International
Standards is normally carried out through IS0 technical committees. Each member
body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council. They are approved in accordance with IS0 procedures requiring at
least 75 % approval by the member bodies voting.
International Standard IS0 7858/1 was prepared by Technical Committee ISO/TC 30,
Measurement of fluid flow in closed conduits.
e
O International Organization for Standardization, 1985
Printed in Switzerland

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INTERNATIONAL STANDARD IS0 7858/1-1985 (E)
Measurement of water flow in closed conduits - Meters
for cold potable water - Combination meters -
Part I : Specifications
m
1
Scope and field of application In all cases the relevant requirements of IS0 4û64/1 shall be
complied with.
This part of IS0 7858 defines the characteristics peculiar to
combination meters consisting of
2 Reference
-
one large meter (the meter with the larger nominal
flowrate, Q,); IS0 4064/1, Measurement of water flow in closed conduits -
Meters for cold potable water - Part 1 : Specification.
- one small meter ;
- one change-over device functioning automatically
without using any source of energy other than that of the 3 Definitions
fluid being measured.
For the purpose of this part of IS0 7858, the definitions given in
Depending on the flowrate of the water passing through the IS0 4064/1, supplemented, as follows, for the case of com-
combination meters, this change-over device directs the water bination meters, apply.
- either through the small meter at low flows, and then
NOTE - In this part of IS0 7858, the capital letter Q signifies the
flowrate of the combination meter, the lower case letter q signifies the
through the large meter only at higher flows;
flowrate of the component meters, completed by the subscript 1 for
- or through the small meter at low flows, and then
the large meter and the subscript 2 for the small meter.
through both meters at higher flows.
3.1 maximum flowrate, Q,,,: The maximum flowrate of
The indicating device of each of the component meters displays
the combination meter is equal to the maximum flowrate of the
a part of the total quantity; the reading of the total volume
large meter, qmaxl.
passed through the combination meter requires the addition of
the readings of each of the two meters.
3.2 minimum flowrate, Q,,,: The minimum flowrate of the
combination meter is equal to the minimum flowrate of the
This part of IS0 7858 is only to be applied in conjunction with
small meter, qmin2.
clauses 1 to 6 of IS0 406411, the provisions of which shall be
complied with. In particular the large and small meters shall be
complete meters conforming to IS04064/1, except for the 3.3 transitional flowrate, Q,: The flowrate at which the
modifications of the meter casings necessary for the inter-
maximum permissible error of the combination meter changes
connection of the component meters forming the combination in value. The value, Qt, to be considered characterizes the
; these casing modifications shall have no metrological assembly of the three elements comprising the combination
meter
effect upon the component meters. meter as defined in clause 1.
1

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IS0 7858/1-1985 (E)
4.1.3 Heights H, and H2
This value is equal to
-
either the transitional flowrate of the small meter, qe;
Because of the wide variations in the height of the various
types of combination meter, it has not been possible
...

SLOVENSKI STANDARD
SIST ISO 7858-1:1996
01-marec-1996
Merjenje pretoka vode v zaprtih vodih - Merila za hladno pitno vodo - Kombinirana
merila - 1. del: Specifikacije
Measurement of water flow in closed conduits -- Meters for cold potable water --
Combination meters -- Part 1: Specifications
Mesurage de débit d'eau dans les conduites fermées -- Compteurs d'eau potable froide -
- Compteurs combinés -- Partie 1: Spécifications
Ta slovenski standard je istoveten z: ISO 7858-1:1985
ICS:
91.140.60 Sistemi za oskrbo z vodo Water supply systems
SIST ISO 7858-1:1996 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ISO 7858-1:1996

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SIST ISO 7858-1:1996
Y-
International Standard @ 785811
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEmnY”AR OPrAHH3AUWR Il0 CTAH~APTH3AUHWORGANlSATlON INTERNATIONALE DE NORMALISATION
Measurement of water flow in closed conduits -
Meters
for cold potable water - Combination meters -
Part 1 : Specifications
Mesurage de débit d‘eau dans les conduites fermées - Compteurs d‘eau potable froide - Compteurs combinés -
Partie 1 : Spécifications
First edition - 198548-15
-
- UDC 681.121.72
Ref. No. IS0 7858/1-1985 (E)
g
Descriptors : flow measurement, water flow, pipe flow, water supply meters, specifications.
.
V
v)
-
Price based on 3 pages

---------------------- Page: 3 ----------------------

SIST ISO 7858-1:1996
Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards bodies (IS0 member bodies). The work of preparing International
Standards is normally carried out through IS0 technical committees. Each member
body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council. They are approved in accordance with IS0 procedures requiring at
least 75 % approval by the member bodies voting.
International Standard IS0 7858/1 was prepared by Technical Committee ISO/TC 30,
Measurement of fluid flow in closed conduits.
e
O International Organization for Standardization, 1985
Printed in Switzerland

---------------------- Page: 4 ----------------------

SIST ISO 7858-1:1996
INTERNATIONAL STANDARD IS0 7858/1-1985 (E)
Measurement of water flow in closed conduits - Meters
for cold potable water - Combination meters -
Part I : Specifications
m
1
Scope and field of application In all cases the relevant requirements of IS0 4û64/1 shall be
complied with.
This part of IS0 7858 defines the characteristics peculiar to
combination meters consisting of
2 Reference
-
one large meter (the meter with the larger nominal
flowrate, Q,); IS0 4064/1, Measurement of water flow in closed conduits -
Meters for cold potable water - Part 1 : Specification.
- one small meter ;
- one change-over device functioning automatically
without using any source of energy other than that of the 3 Definitions
fluid being measured.
For the purpose of this part of IS0 7858, the definitions given in
Depending on the flowrate of the water passing through the IS0 4064/1, supplemented, as follows, for the case of com-
combination meters, this change-over device directs the water bination meters, apply.
- either through the small meter at low flows, and then
NOTE - In this part of IS0 7858, the capital letter Q signifies the
flowrate of the combination meter, the lower case letter q signifies the
through the large meter only at higher flows;
flowrate of the component meters, completed by the subscript 1 for
- or through the small meter at low flows, and then
the large meter and the subscript 2 for the small meter.
through both meters at higher flows.
3.1 maximum flowrate, Q,,,: The maximum flowrate of
The indicating device of each of the component meters displays
the combination meter is equal to the maximum flowrate of the
a part of the total quantity; the reading of the total volume
large meter, qmaxl.
passed through the combination meter requires the addition of
the readings of each of the two meters.
3.2 minimum flowrate, Q,,,: The minimum flowrate of the
combination meter is equal to the minimum flowrate of the
This part of IS0 7858 is only to be applied in conjunction with
small meter, qmin2.
clauses 1 to 6 of IS0 406411, the provisions of which shall be
complied with. In particular the large and small meters shall be
complete meters conforming to IS04064/1, except for the 3.3 transitional flowrate, Q,: The flowrate at which the
modifications of the meter casings necessary for the inter-
maximum permissible error of the combination meter changes
connection of the component meters forming the combination in value. The value, Qt, to be considered characterizes the
; these casing modifications shall have no metrological assembly of the
...

Norme internationale @ 785811
~ ~~
INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONOMEXAYHAPOLlHAR OPrAHllJAUWR il0 CTAH&lAPTM3AUWM*ORGANISATlON INTERNATIONALE DE NORMALISATION
Mesurage de débit d'eau dans les conduites fermées -
Compteurs d'eau potable froide - Compteurs combinés -
Partie 1 : Spécifications
Measurement of water flow in closed conduits - Meters for cold potable water - Combination meters - Part I : Specifications
Première édition - 1985-08-15
Réf. no : IS0 7858/1-1985 (FI
CDU 681.121.72
Descripteurs : mesurage de débit, écoulement d'eau, écoulement en conduite fermée, compteur d'eau, spécifications.
Prix basé sur 3 pages

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Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale
d'organismes nationaux de normalisation (comités membres de I'ISO). L'élaboration
des Normes internationales est confiée aux comités techniques de 1'60. Chaque
comité membre intéressé par une étude a le droit de faire partie du comité technique
créé à cet effet. Les organisations internationales, gouvernementales et non gouverne-
mentales, en liaison avec I'ISO, participent également aux travaux.
Les proiets de Normes internationales adoptés par les comités techniques sont soumis
aux comités membres pour approbation, avant leur acceptation comme Normes inter-
nationales par le Conseil de WO. Les Normes internationales sont approuvées confor-
mément aux procédures de I'ISO qui requièrent l'approbation de 75 % au moins des
comités membres votants.
La Norme internationale IS0 7858/1 a été élaborée par le comité technique ISO/TC 30,
Mesure de débit des fluides dans les conduites fermées.
0 Organisation internationale de normalisation, 1985 O
Imprimé en Suisse

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NOR M E I NTE R N AT1 O N A LE IS0 7858/1-1985 (FI
Mesurage de débit d’eau dans les conduites fermées -
Compteurs d‘eau potable froide - Compteurs combinés -
Partie 1 : Spécifications
combiné; ces modifications d’enveloppes ne doivent avoir
1 Objet et domaine d’application
aucune influence métrologique sur les compteurs composants.
La présente partie de I’ISO 7858 définit les caractéristiques pro-
En tout cas, les prescriptions correspondantes de I‘ISO 4064/1
pres aux compteurs combinés constitués par
doivent être respectées.
-
un grand compteur (celui dont le débit nominal, Qn, est
le plus important) ;
2 Référence
- un petit compteur ;
- un dispositif commutateur fonctionnant automatique- IS0 4064/1, Mesurage de débit d‘eau dans les conduites
fermées - Compteurs d‘eau potable froide - Partie I: Spéci-
ment, sans apport d’énergie autre que celle du fluide
mesuré. fications.
En fonction des débits de l‘eau passant par le compteur com-
3 Définitions
biné, ce dispositif commutateur conduit l’eau
Dans le cadre de la présente Norme internationale, les défini-
- soit au travers du petit compteur à faible débit et
tions de I‘ISO 4064/1 complétées comme suit, dans le cas des
ensuite, au travers du grand compteur seul aux plus grands
compteurs combinés, sont applicables.
débits;
- soit au travers du petit compteur à faible débit et
NOTE - Dans la présente partie de I‘ISO 7858, la lettre majuscule Q
ensuite, au travers des deux compteurs ensemble aux plus désigne les débits du compteur combiné, la lettre minuscule q désigne
les débits des compteurs composants, complétés par l’indice 1 pour le
grands débits.
grand compteur et l’indice 2 pour le petit compteur.
Le totalisateur de chacun des compteurs composants indiquant
une quantité partielle, le relevé du volume total écoulé dans le
débit maximal, Q,,,: Le débit maximal du compteur
3.1
compteur combiné nécessite de faire l’addition des indications
combiné est égal au débit maximal qmaxl du grand compteur.
du totalisateur de chacun des deux compteurs.
3.2 débit minimal, Qmin: Le débit minimal du compteur
La présente partie de I‘ISO 7858 n‘est applicable qu’en liaison
combiné est égal au débit minimal qmin2 du petit compteur.
avec les chapitres 1 à 6 de 1’1S0 W/1 dont les prescriptions
doivent être respectées, en particulier le grand et le petit comp-
3.3 débit de transition, Qt: Le débit auquel l’erreur maxi-
teur doivent être des compteurs complets conformes a
male admissible du compteur combiné change de valeur. La
I‘lSO 4064/ 1, sauf modifications des enveloppes nécessaires
valeur à considérer, Qt , caractérise l’ensemble des trois
pour le raccordement des compteurs composant le compteur
1

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IS0 78!58/1-1985 (FI
4.1.3 Hauteurs H1, H2
éléments constituant le compteur combiné tel que défini au
chapitre 1.
En raison des larges variations de hauteur des divers types de
Cette valeur est égale compteurs combinés, il n'a pas été possible de normaliser ces
dimensions.
- soit au débit de transition qt2 du petit compteur ;
Les tolérances pour le tableau sont les même
...