EN ISO 4064-3:2014

SLOVENSKI STANDARD
01-julij-2014
1DGRPHãþD
SIST EN 14154-1:2005+A2:2011
SIST EN 14154-2:2005+A2:2011
SIST EN 14154-3:2005+A2:2011
9RGRPHUL]DPHUMHQMHKODGQHSLWQHYRGHLQYURþHYRGHGHO2EOLNDSRURþLODR
SUHVNXVX,62
Water meters for cold potable water and hot water - Part 3: Test report format (ISO 4064-
3:2014)
Wasserzähler zum Messen von kaltem Trinkwasser und heißem Wasser - Teil 3: Format
des Prüfberichtes (ISO 4064-3:2014)
Compteurs d'eau destinés au mesurage de l'eau potable froide et chaude - Partie 3:
Format du rapport d'essai (ISO 4064-3:2014)
Ta slovenski standard je istoveten z: EN ISO 4064-3:2014
ICS:
17.120.10 Pretok v zaprtih vodih Flow in closed conduits
91.140.60 Sistemi za oskrbo z vodo Water supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 4064-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2014
ICS 91.140.60 Supersedes EN 14154-1:2005+A2:2011, EN 14154-
2:2005+A2:2011, EN 14154-3:2005+A2:2011
English Version
Water meters for cold potable water and hot water - Part 3: Test
report format (ISO 4064-3:2014)
Compteurs d'eau potable froide et d'eau chaude - Partie 3: Wasserzähler zum Messen von kaltem Trinkwasser und
Format du rapport d'essai (ISO 4064-3:2014) heißem Wasser - Teil 3: Format des Prüfberichtes (ISO
4064-3:2014)
This European Standard was approved by CEN on 21 September 2013.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4064-3:2014 E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 4064-3:2014) has been prepared by Technical Committee ISO/TC 30 “Measurement
of fluid flow in closed conduits” in collaboration with Technical Committee CEN/TC 92 “Water meters” the
secretariat of which is held by SNV.
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 December 2014, and conflicting national standards shall be withdrawn
at the latest by December 2014.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 14154-1:2005+A2:2011, EN 14154-2:2005+A2:2011,
EN 14154-3:2005+A2:2011.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 4064-3:2014 has been approved by CEN as EN ISO 4064-3:2014 without any modification.
INTERNATIONAL ISO
STANDARD 4064-3
Fourth edition
2014-06-01
Water meters for cold potable water
and hot water —
Part 3:
Test report format
Compteurs d’eau potable froide et d’eau chaude —
Partie 3: Format du rapport d’essais
Reference number
ISO 4064-3:2014(E)
©
ISO 2014
ISO 4064-3:2014(E)
© ISO 2014
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved

ISO 4064-3:2014(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols, and abbreviated terms . 1
4 Type evaluation report . 1
4.1 General . 1
4.2 Information concerning the type . 2
4.3 General information concerning the test equipment .12
4.4 Check list for water meter examinations and performance tests .13
4.5 Type evaluation tests (for all water meters) .23
4.6 Type evaluation tests (for electronic water meters and mechanical water meters with
electronic components).47
5 Initial verification report.68
5.1 General .68
5.2 Information concerning the EUT verified .68
5.3 Initial verification test report (ISO 4064-2:2014|OIML R 49-2:2013, Clause 10) .68
Annex A (normative) List of documents concerning the type (ISO 4064‑1:2014|OIML R 49‑1:2013,
7.2.9) .73
Annex B (normative) Listing of test equipment used in examinations and tests .74
ISO 4064-3:2014(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO 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, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2, www.iso.org/directives.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any
patent rights identified during the development of the document will be in the Introduction and/or on
the ISO list of patent declarations received, www.iso.org/patents.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
The committees responsible for this document are Technical Committee ISO/TC 30, Measurement of fluid
flow in closed conduits, Subcommittee SC 7, Volume methods including water meters and OIML Technical
Subcommittee TC 8/SC 5 Water meters.
This fourth edition of ISO 4064-3 cancels and replaces the third edition (ISO 4064-3:2005), which has
been technically revised. Provisions of the third edition are addressed in ISO 4064-2:2014|OIML R 49-
2:2013.
ISO 4064 consists of the following parts, under the general title Water meters for cold potable water and
hot water:
— Part 1: Metrological and technical requirements
— Part 2: Test methods
— Part 3: Test report format
— Part 4: Non-metrological requirements not covered in ISO 4064-1
— Part 5: Installation requirements
This edition of ISO 4064-3 is identical to the corresponding edition of OIML R 49-3, which has been
issued concurrently. OIML R 49-3 was approved for final publication by the International Committee of
Legal Metrology at its 48th meeting in Ho Chi Minh City, Vietnam in October 2013. It will be submitted
to the International Conference on Legal Metrology in 2016 for formal sanction.
iv © ISO 2014 – All rights reserved

ISO 4064-3:2014(E)
Introduction
Implementation of this test report format is informative with regard to the implementation of
ISO 4064-1|OIML R 49-1 and ISO 4064-2|OIML R 49-2 in national regulations; however, its implementation
is required within the framework of the OIML Certificate System for Measuring Instruments
[ISO 4064-2:2014|OIML R 49-2:2013, 11.1].
Clause 4 shows the required format of a type evaluation report for a complete or combined water meter.
A type evaluation report for a separable calculator (including indicating device) or a measurement
transducer (including flow or volume sensor) requires a similar format. However, some modifications to
the tables may be required because a large number of variations in the design of these separable units
is possible.
Some examples of tables for presenting the test results for separable units are shown in Clause 5 for
initial verifications. These tables can also be adapted for type evaluation reports.
INTERNATIONAL STANDARD ISO 4064-3:2014(E)
Water meters for cold potable water and hot water —
Part 3:
Test report format
1 Scope
This part of ISO 4064|OIML R 49 specifies a test report format to be used in conjunction with
ISO 4064-1|OIML R 49-1 and ISO 4064-2|OIML R 49-2 for water meters for cold potable water and hot
water.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 4064-1:2014|OIML R 49-1:2013, Water meters for cold potable water and hot water — Part 1:
Metrological and technical requirements
ISO 4064-2:2014|OIML R 49-2:2013, Water meters for cold potable water and hot water — Part 2: Test
methods
3 Terms, definitions, symbols, and abbreviated terms
For the purposes of this document, the terms and definitions given in ISO 4064-1|OIML R 49-1 apply.
Some symbols and abbreviated terms used in the tables are as follows.
+ pass
− fail
n/a not applicable
EUT equipment under test
H horizontal
MAP maximum admissible pressure
MAT maximum admissible temperature
MPE maximum permissible error
V vertical
4 Type evaluation report
4.1 General
For each examination and test the checklist shall be completed according to this example:
ISO 4064-3:2014(E)
+ −
× Pass
× Fail
n/a n/a Not applicable
4.2 Information concerning the type
4.2.1 General
Application _________________________________
number:
Applicant: _________________________________
Authorized _________________________________
representative:
Address: _________________________________
_________________________________
_________________________________
_________________________________
Testing _________________________________
laboratory:
Authorized _________________________________
representative:
Address: _________________________________
_________________________________
_________________________________
_________________________________
4.2.2 Model submitted
New model: _________________________________
Variant of approved model(s):
Approval number: _________________________________
Variation of approved model: _________________________________
See Table 1.
2 © ISO 2014 – All rights reserved

ISO 4064-3:2014(E)
Table 1 — Model submitted
a a
Submitted for approval tests Yes No Remarks
Mechanical water meter (complete)
Mechanical water meter (combined)
Electronic water meter (complete)
Electronic water meter (combined)
Family of water meters
Separable calculator (including indicating device)
Separable measurement transducer (including flow
or volume sensor)
Supplementary electronic device(s) for testing (per-
manently attached to meter)
Supplementary electronic device(s) for data trans-
mission (permanently attached to meter)
Supplementary electronic device(s) for testing (tem-
porarily attached to meter)
Supplementary electronic device(s) for data trans-
mission (temporarily attached to meter)
Ancillary devices
a
Tick as appropriate.
4.2.3 Mechanical water meter (complete or combined)
Manufacturer: __________________________________________________
Model number: __________________________________________________
Type details:
Q _________ m /h
Q _________ m /h
Q _________ m /h
Q _________ m /h
Q /Q _________
3 1
ISO 4064-3:2014(E)
for combination meters
Q _________ m /h
x1
Q _________ m /h
x2
Measuring principle: __________________________
Accuracy class: _____________
Temperature class: _____________
Environmental class: _____________
Electromagnetic environment: _____________
Maximum admissible _________ °C
temperature:
Maximum admissible pressure: ___________ MPa (_____ bar)
Orientation limitation: _________________________
EUT testing requirements (ISO 4064-2:2014|OIML R 49-2:2013, 8.1.8):
Category: _________________________
Case: _________________________
Installation details:
Connection type (flange, screw _________
thread, concentric manifold):
Minimum straight length of inlet __________ mm
pipe:
Minimum straight length of out- __________ mm
let pipe:
Flow conditioner (details if _________________________
required):
Mounting: _________________________
Orientation: _________________________
Other relevant information: _________________________
NOTE If a family of meters is submitted, the details in this subclause are to be given for each size of water
meter.
4 © ISO 2014 – All rights reserved

ISO 4064-3:2014(E)
4.2.4 Electronic water meter (complete or combined)
Manufacturer: __________________________________________________
Model number: __________________________________________________
Type details:
Q _________ m /h
Q _________ m /h
Q _________ m /h
Q _________ m /h
Q /Q _________
3 1
for combination meters
Q _________ m /h
x1
Q _________ m /h
x2
Measuring principle: __________________________
Accuracy class: _____________
Temperature class: _____________
Environmental class: _____________
Electromagnetic environment: _____________
Maximum admissible temperature: _________ °C
Maximum admissible pressure: ___________ MPa (_____ bar)
Orientation limitation: _________________________
EUT testing requirements (ISO 4064-2:2014|OIML R 49-2:2013, 8.1.8):
Category: _________________________
Case: _________________________
ISO 4064-3:2014(E)
Installation details (mechanical):
Connection type (flange, screw thread, _________
concentric manifold):
Minimum straight length of inlet pipe: __________ mm
Minimum straight length of outlet pipe: __________ mm
Flow conditioner (details if required): _________________________
Mounting: _________________________
Orientation: _________________________
Other relevant information: _________________________
Installation details (electrical):
Wiring instructions: _________________________
Mounting arrangement: _________________________
Orientation limitations: _________________________
Power supply:
Type (battery, mains AC, mains DC): _________________________
U : ______________________ V
max
U : ______________________ V
min
Frequency: _______________________ Hz
NOTE If a family of meters is submitted, the details in this subclause are to be given for each size of water
meter.
4.2.5 Separable calculator (including indicating device)
Manufacturer: __________________________________________________
Model number: __________________________________________________
Type details:
Q _________ m /h
Q _________ m /h
Q _________ m /h
Q _________ m /h
Q /Q _________
3 1
6 © ISO 2014 – All rights reserved

ISO 4064-3:2014(E)
for combination meters
Q _________ m /h
x1
Q _________ m /h
x2
Measuring principle: __________________________
Accuracy class: _____________
Temperature class: _____________
Environmental class: _____________
Electromagnetic environment: _____________
Maximum admissible temperature: _________°C
Maximum admissible pressure: ___________MPa (_____ bar)
Orientation limitation: _________________________
EUT testing requirements (ISO 4064-2:2014|OIML R 49-2:2013, 8.1.8):
Category: _________________________
Case: _________________________
Maximum relative error specified by the manufacturer:
Lower flow rate zone, Q ≤ Q < Q : ________________________%
1 2
Upper flow rate zone, Q ≤ Q ≤ Q : ________________________%
2 4
Installation details (electrical):
Wiring instructions: _________________________
Mounting arrangement: _________________________
Orientation limitations: _________________________
Power supply:
Type (battery, mains AC, mains DC): _________________________
U : ________________________ V
max
U : ________________________ V
min
Frequency: _______________________ Hz
Approval number(s) of compatible meas-
urement transducer(s) (including flow or
volume sensor): ____________________
ISO 4064-3:2014(E)
4.2.6 Separable measurement transducer (including flow or volume sensor)
Manufacturer: __________________________________________________
Model number: __________________________________________________
Type details:
Q _________ m /h
Q _________ m /h
Q _________ m /h
Q _________ m /h
Q /Q _________
3 1
for combination meters
Q _________ m /h
x1
Q _________ m /h
x2
Measuring principle: __________________________
Accuracy class: _____________
Temperature class: _____________
Environmental class: _____________
Electromagnetic environment: _____________
Maximum admissible temperature: _________°C
Maximum admissible pressure: ___________MPa (_____ bar)
Orientation limitation: _________________________
EUT testing requirements (ISO 4064-2:2014|OIML R 49-2:2013, 8.1.8):
Category: _________________________
Case: _________________________
Maximum relative error specified by the manufacturer:
Lower flow rate zone, Q ≤ Q < Q : ________________________%
1 2
Upper flow rate zone, Q ≤ Q ≤ Q : ________________________%
2 4
8 © ISO 2014 – All rights reserved

ISO 4064-3:2014(E)
Installation details (mechanical):
Connection type (flange, screw thread, concentric mani- _________
fold):
Minimum straight length of inlet pipe: __________mm
Minimum straight length of outlet pipe: __________mm
Flow conditioner (details if required): _________________________
Mounting: _________________________
Orientation: _________________________
Other relevant information: _________________________
Installation details (electrical):
Wiring instructions: _________________________
Mounting arrangement: _________________________
Orientation limitations: _________________________
Power supply:
Type (battery, mains AC, mains DC): _________________________
U : ________________________ V
max
U : ________________________ V
min
Frequency: _______________________ Hz
Approval number(s) of compatible calculator(s)
(including indicating device): _________________________
4.2.7 Supplementary electronic device(s) used for testing (permanently attached to meter)
Manufacturer: __________________________________________________
Model number: __________________________________________________
Power supply:
Type (battery, mains AC, mains DC): _________________________
: ________________________ V
U
max
U : ________________________ V
min
Frequency: _______________________ Hz
ISO 4064-3:2014(E)
Installation details (electrical):
Wiring instructions: _________________________
Mounting arrangement: _________________________
Orientation limitations: _________________________
4.2.8 Supplementary electronic device(s) used for data transmission (permanently attached to
meter)
Manufacturer: __________________________________________________
Model number: __________________________________________________
Power supply:
Type (battery, mains AC, mains DC): _________________________
U : ________________________ V
max
U : ________________________ V
min
Frequency: _______________________ Hz
Installation details (electrical):
Wiring instructions: _________________________
Mounting arrangement: _________________________
Orientation limitations: _________________________
4.2.9 Supplementary electronic device(s) used for testing (temporarily attached to meter)
Manufacturer: __________________________________________________
Model number: __________________________________________________
Power supply:
Type (battery, mains AC, mains DC): _________________________
U : ________________________ V
max
U : ________________________ V
min
Frequency: _______________________ Hz
10 © ISO 2014 – All rights reserved

ISO 4064-3:2014(E)
Installation details (electrical):
Wiring instructions: _________________________
Mounting arrangement: _________________________
Orientation limitations: _________________________
4.2.10 Supplementary electronic device(s) used for data transmission (temporarily attached to
meter)
Manufacturer: __________________________________________________
Model number: __________________________________________________
Power supply:
Type (battery, mains AC, mains DC): _________________________
U : ________________________ V
max
U : ________________________ V
min
Frequency: _______________________ Hz
EUT testing requirements (ISO 4064-2:2014|OIML R 49-2:2013, 8.1.8):
Category: _________________________
Case: _________________________
Installation details (electrical):
Wiring instructions: _________________________
Mounting arrangement: _________________________
Orientation limitations: _________________________
4.2.11 Ancillary devices
Manufacturer: __________________________________________________
Model number: __________________________________________________
ISO 4064-3:2014(E)
Power supply:
Type (battery, mains AC, mains DC): _________________________
U : ________________________ V
max
U : ________________________ V
min
Frequency: _______________________ Hz
Approval number(s) of compatible calculator(s)
(including indicating device): _________________________
EUT testing requirements (ISO 4064-2:2014|OIML R 49-2:2013, 8.1.8):
Category: _________________________
Case: _________________________
Installation details (electrical):
Wiring instructions: _________________________
Mounting arrangement: _________________________
Orientation limitations: _________________________
Approval number(s) of compatible water
meters, calculator(s) (including indicating
device) and measurement transducer(s)
(including flow or volume sensor): _________________________
4.2.12 Documents concerning the type
A list of documents shall be submitted with the type approval application as in Annex A.
4.3 General information concerning the test equipment
Details of all items of measuring equipment and test instruments used for the type examinations, and
initial verifications shall be listed in Annex B, including:
Manufacturer
Model number
Serial number
Date of last calibration
Date of next calibration due of e.g. instruments for measuring:
— linear dimensions
— pressure gauges
— pressure transmitters
— manometers
— temperature transducers
12 © ISO 2014 – All rights reserved

ISO 4064-3:2014(E)
— reference meters
— volume tanks
— weighing machines
— signal generators (for pulse, current or voltage)
4.4 Check list for water meter examinations and performance tests
4.4.1 Check list for water meter examinations
External examination for all water meters
ISO 4064-1:2014| Requirement + − Remarks
OIML R 49-1:2013,
subclause
Function of the indicating device
6.7.1.1 The indicating device shall provide an easily read, reliable
and unambiguous visual indication of the indicated volume
6.7.1.1 The indicating device shall include visual means for testing
and calibration.
6.7.1.1 The indicating device may include additional elements for
testing and calibration by other methods, e.g. for automatic
testing and calibration
Unit of measurement and its placement
6.7.1.2 The indicated volume of water shall be expressed in cubic
metres
6.7.1.2 The symbol m shall appear on the dial or immediately adja-
cent to the numbered display
Indicating range
6.7.1.3 For Q ≤ 6,3, the minimum indicating range is 0 m to
9 999 m
6.7.1.3 For 6,3 < Q ≤ 63, the minimum indicating range is 0 m to
99 999 m
6.7.1.3 For 63 < Q ≤ 630, the minimum indicating range is 0 m to
999 999 m
6.7.1.3 For 630 < Q ≤ 6 300, the minimum indicating range is 0 m
to 9 999 999 m
Colour coding for indicating device
6.7.1.4 The colour black should be used to indicate the cubic metre
and its multiples
6.7.1.4 The colour red should be used to indicate sub-multiples of a
cubic metre
6.7.1.4 The colours shall be applied to either the pointers, indexes,
numbers, wheels, discs, dials or aperture frames
6.7.1.4 Other means of indicating the cubic metre may be used
provided there is no ambiguity in distinguishing between
the primary indication and alternative displays, e.g. sub-
multiples for verification and testing
Types of indicating device: Type 1 — Analogue device
ISO 4064-3:2014(E)
External examination for all water meters
ISO 4064-1:2014| Requirement + − Remarks
OIML R 49-1:2013,
subclause
6.7.2.1 The indicated volume shall be shown by continuous move-
ment of either:
a) one or more pointers moving relative to graduated
scales; or
b) one or more circular scales or drums each passing
an index
6.7.2.1 The value expressed in cubic metres for each scale division
n
shall be of the form 10 , where n is a positive or a negative
whole number or zero, thereby establishing a system of
consecutive decades.
6.7.2.1 The scale shall be graduated in values expressed in cubic
metres or accompanied by a multiplying factor
(×0,001; ×0,01; ×0,1; ×1; ×10; ×100; ×1 000 etc.)
6.7.2.1 Rotational movement of the pointers or circular scales shall
be clockwise
6.7.2.1 Linear movement of pointers or scales shall be left to right
6.7.2.1 Movement of numbered roller indicators shall be upwards
Types of indicating device: Type 2 — Digital device
6.7.2.2 The indicated volume is given by a line of digits appearing in
one or more apertures
6.7.2.2 The advance of one digit shall be completed while the digit
of the next immediately lower decade changes from 9 to 0
6.7.2.2 The apparent height of the digits shall be at least 4 mm
6.7.2.2 For non-electronic devices, movement of numbered roller
indicators (drums) shall be upwards
6.7.2.2 For non-electronic devices, the lowest value decade may
have a continuous movement, the aperture being large
enough to permit a digit to be read without ambiguity
6.7.2.2 For electronic devices with non-permanent displays the vol-
ume shall be able to be displayed at any time for at least 10 s
6.7.2.2 For electronic devices, the meter shall provide visual check-
ing of the entire display which shall have the following
sequence:
— for seven segment type displaying all the elements (e.g.
an “eights” test); and
— for seven segment type blanking all the elements (a
“blanks” test).
For graphical displays, an equivalent test is required to dem-
onstrate that display faults cannot result in any digit being
misinterpreted.
Each step of the sequence shall last at least 1 s
Types of indicating device: Type 3 — Combination of analogue and digital devices
6.7.2.3 The indicated volume is given by a combination of type 1
and type 2 devices and the respective requirements of each
shall apply
Verification devices — General requirements
14 © ISO 2014 – All rights reserved

ISO 4064-3:2014(E)
External examination for all water meters
ISO 4064-1:2014| Requirement + − Remarks
OIML R 49-1:2013,
subclause
6.7.3.1 Every indicating device shall provide means for visual, non-
ambiguous verification testing and calibration
6.7.3.1 The visual verification may have either a continuous or a
discontinuous movement
6.7.3.1 In addition to the visual verification display, an indicating
device may include provisions for rapid testing by the inclu-
sion of complementary elements (e.g. star wheels or discs),
providing signals through externally attached sensors.
Verification devices — Visual verification displays
6.7.3.2.1 The value of the verification scale interval, expressed in
n n n
cubic metres, shall be of the form:1 × 10 , 2 × 10 or 5 × 10 ,
where n is a positive or negative whole number, or zero
6.7.3.2.1 The indicated volume is given by a line of digits appearing in
one or more apertures
6.7.3.2.1 For analogue or digital indicating devices with continuous
movement of the first element, the verification scale interval
may be formed from the division into 2, 5 or 10 equal parts
of the interval between two consecutive digits of the first
element. Numbering shall not be applied to these divisions
6.7.3.2.1 For digital indicating devices with discontinuous move-
ment of the first element, the verification scale interval is
the interval between two consecutive digits or incremental
movements of the first element
6.7.3.2.2 On indicating devices with continuous movement of the first
element, the apparent scale spacing shall be not less than
1 mm and not more than 5 mm
6.7.3.2.2 The scale shall consist of either:
a) lines of equal thickness not exceeding one quarter of
the scale spacing and differing only in length; or
b) contrasting bands of a constant width equal to the
scale spacing
6.7.3.2.2 The apparent width of the pointer at its tip shall not exceed
one-quarter of the scale spacing and in no case shall it be
greater than 0,5 mm
Resolution of the indicating device
6.7.3.2.3 The sub-divisions of the verification scale shall be small
enough to ensure that the resolution of the indicating device
does not exceed 0,25 % of the actual volume for accuracy
class 1 meters, and 0,5 % of the actual volume for accuracy
class 2 meters, for a 90 min test at the minimum flow rate,
Q .
NOTE 1 When the display of the first element is continuous,
an allowance should be made for a maximum error in each
reading of not more than half of the verification scale inter-
val.
NOTE 2 When the display of the first element is discontinu-
ous, an allowance should be made for a maximum error in
each reading of not more than one digit of the verification
scale
ISO 4064-3:2014(E)
External examination for all water meters
ISO 4064-1:2014| Requirement + − Remarks
OIML R 49-1:2013,
subclause
NOTE For combination meters with two indicating devices, the above requirements apply to both indicating
devices.
Marks and inscriptions
6.6.1 A place shall be provided on the meter for affixing the verifi-
cation mark, which shall be visible without dismantling the
meter
6.6.2 The water meter shall be clearly and indelibly marked with
the information listed in the following, either grouped or
distributed on the casing, the indicating device dial, an iden-
tification plate or on the meter cover if is not detachable
6.6.2 a) Unit of measurement: cubic metre
6.6.2 b) The accuracy class, where it differs from accuracy class 2
6.6.2 c) The numerical value of Q and the ratio Q /Q (may be
3 3 1
preceded by R). If the meter measures reverse flow and Q
and the ratio Q /Q are different in the two directions, both
3 1
values of Q and Q /Q shall be inscribed; the direction of
3 3 1
flow to which each pair of values refers shall be clear. If the
meter has different values of Q /Q in horizontal and verti-
3 1
cal positions, both values of Q /Q shall be inscribed, and the
3 1
orientation to which each value refers shall be clear
6.6.2 d) The type approval sign according to national regulations
6.6.2 e) The name or trademark of the manufacturer
6.6.2 f) The year of manufacture (or the last two digits of the year of
manufacture or the month and year of manufacture)
6.6.2 g) The serial number (as near as possible to the indicating
device)
6.6.2 h) The direction of flow (shown on both sides of the body; or on
one side only, provided the direction of flow arrow is easily
visible under all circumstances)
6.6.2 i) The maximum admissible pressure (MAP) if it exceeds
1 MPa (10 bar) or 0,6 MPa (6 bar) for nominal diameter
≥500 mm.
(The unit bar may be used where national regulations per-
mit)
6.6.2 j) The letter V or H, if the meter can only be operated in the
vertical or horizontal position
6.6.2 k) The temperature class where it differs from T30
6.6.2 l) The pressure loss class where it differs from Δp 63
6.6.2 m) The installation sensitivity class where it differs from U0/
D0
Additional markings for water meters with electronic devices
6.6.2 n) For an external power supply: the voltage and frequency
6.6.2 o) For a replaceable battery: the latest date by which the bat-
tery shall be replaced
6.6.2 p) For a non-replaceable battery: the latest date by which the
meter shall be replaced
6.6.2 q) Environmental classification
16 © ISO 2014 – All rights reserved

ISO 4064-3:2014(E)
External examination for all water meters
ISO 4064-1:2014| Requirement + − Remarks
OIML R 49-1:2013,
subclause
6.6.2 r) Electromagnetic environmental class
Protection devices
6.8.1 Water meters shall include protection devices which can be
sealed so as to prevent, both before and after correct instal-
lation of the water meter, dismantling or modification of the
meter, its adjustment device or its correction device, without
damaging these devices. In the case of combination meters,
this requirement applies to both meters
Protection devices — Electronic sealing devices
6.8.2.1 When access to parameters that influence the determination
of the results of measurements is not protected by mechani-
cal sealing devices, the protection shall fulfil the following
provisions.
a) Access shall only be allowed to authorized people,
e.g. by means of a code (password) or of a special device
(hard key, etc.). The code shall be capable of being changed.
b) It shall be possible for at least the last intervention
to be memorized. The record shall include the date and a
characteristic element identifying the authorized person
making the intervention [see a)]. If it is possible to memorize
more than one intervention and if a previous intervention
requires deletion to permit a new record, the oldest record
shall be deleted
6.8.2.2 For meters with parts which can be disconnected one from
another by the user and which are interchangeable, the fol-
lowing provisions shall be fulfilled:
a) it shall not be possible to access parameters that
participate in the determination of results of measure-
ments through disconnected points unless the provisions of
ISO 4064-1:2014|OIML R 49-1:2013, 6.8.2.1 are fulfilled;
b) interposing any device which may influence the
accuracy shall be prevented by means of electronic and data
processing securities or, if this is not possible, by mechanical
means
6.8.2.3 For meters with parts which may be disconnected one from
the other by the user and which are not interchangeable, the
provisions in ISO 4064-1:2014|OIML R 49-1:2013, 6.8.2.2
apply.
Moreover, these meters shall be provided with devices
which do not allow them to operate if the various parts are
not connected according to the approved type.
NOTE Disconnections which are not allowed to the user
may be prevented, e.g. by means of a device that prevents
any measurement after disconnecting and reconnecting
Examination and testing of checking facilities
General requirements for examining checking facilities
ISO 4064-3:2014(E)
External examination for all water meters
ISO 4064-1:2014| Requirement + − Remarks
OIML R 49-1:2013,
subclause
5.1.3 Water meters with electronic devices shall be provided with
the checking facilities specified in ISO 4064-1:2014|OIML
R 49-1:2013, Annex B, except in the case of non-resettable
measurements between two constant partners
5.1.3 All meters equipped with checking facilities shall prevent or
detect reverse flow, as laid down in ISO 4064-1:2014|OIML
R 49-1:2013, 4.2.7.
4.4.2 Checklist for water meter performance tests
4.4.2.1 Performance tests for all water meters
ISO 4064-1:2014| Requirement + − Remarks
OIML R 49-1:2013,
subclause
Static pressure test
4.2.10 The meter shall be capable of withstanding the following test
pressures without leakage or damage:
— 1,6 times the maximum admissible pressure for
15 min;
— 2 times the maximum admissible pressure for 1 min
Intrinsic errors (of indication)
18 © ISO 2014 – All rights reserved

ISO 4064-3:2014(E)
ISO 4064-1:2014| Requirement + − Remarks
OIML R 49-1:2013,
subclause
7.2.3 The errors (of indication) of the water meter (in the measure-
ment of the actual volume), shall be determined at least at the
following flow rate ranges:
a) Q to 1,1Q ;
1 1
b) Q to 1,1 Q ;
2 2
c) 0,33(Q + Q ) to 0,37(Q + Q );
2 3 2 3
d) 0,67(Q + Q ) to 0,74(Q + Q );
2 3 2 3
e) 0,9Q to Q ;
3 3
f) 0,95Q to Q ;
4 4
and for combination meters:;
g) 0,85Q to 0,95Q ;
x1 x1
h) 1,05Q to 1,15Q
x2 x2.
The water meter should be tested without its temporary sup-
plementary devices attached (if any).
During a test all other influence factors shall be held at refer-
ence conditions.
Other flow rates may be tested depending on the shape of the
error curve.
1) The relative errors (of indication) observed for each
of the flow rates shall not exceed the maximum permissible
errors (MPEs) given in ISO 4064-1:2014|OIML R 49-1:2013, 4.2.2
or 4.2.3. If the error observed on one or more meters is greater
than the MPE at one flow rate only, then if only two results have
been taken at that flow rate, the test at that flow rate shall be
repeated. The test shall be declared satisfactory if two out of the
three results at that flow rate lie within the MPE and the arith-
metic mean of the results for the three tests at that flow rate lies
within the MPE.
2) If all the relative errors (of indication) of the water
meter have the same sign, at least one of the errors shall not
exceed one-half of the MPE. In all cases, this requirement shall
be applied equitably with respect to the water supplier and the
consumer (see also ISO 4064-1:2014|OIML R 49-1:2013, 4.3.3 3)
and 8)
7.2.4 The meter
...