ISO 4064-2-2024 PDF

Full title and description

St ISO 4064-2:2024 — Water meters for cold potable water and hot water — Part 2: Test methods. This part of ISO 4064 specifies the test programme, principles, equipment and procedures for type evaluation and initial verification testing of water meters (including provisions for testing complete meters and separate transducers/calculators), and applies to ancillary devices where required by national regulations.

Abstract

This document is intended for the type evaluation and initial verification of water meters for cold potable water and hot water as defined in ISO 4064-1:2024. It describes detailed test procedures, required test equipment, test sequences and acceptance criteria needed to assess meter performance for metrological conformity and for issuance of conformity certificates under applicable systems.

General information

• Status: Published.
• Publication date: 19 December 2024 (edition 5, 2024).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 91.140.60 (flow measurement; water meters).
• Edition / version: Edition 5 (2024).
• Number of pages: 97 pages.

Scope

Applies to type evaluation and initial verification testing of water meters for cold potable water and hot water (as defined in ISO 4064-1:2024). Covers the required test programme, measurement principles, test equipment, specimen preparation, test sequences (including flow range points), environmental and endurance tests, and acceptance criteria for meters and, where relevant, for separate transducers and calculators. The document is aligned with related OIML and ISO parts for conformity assessment.

Key topics and requirements

• Definitions and general conditions for meter type evaluation and initial verification.
• Detailed test programme and sequence for flow and metrological performance (incl. minimum and maximum flow points, intermediate checks).
• Test equipment specifications and calibration requirements for test rigs and reference meters.
• Procedures for testing complete meters and for testing measurement transducers (flow/volume sensors) and calculators/indicators as separate units.
• Environmental, mechanical and durability tests relevant to intended service (temperature, pressure, endurance, ingress protection as applicable).
• Acceptance criteria and reporting requirements to support conformity assessment and certification (OIML/ISO alignment noted).

Typical use and users

Primary users include water meter manufacturers, type-test laboratories, national metrology institutes, conformity assessment bodies, utilities and regulators responsible for approving, verifying and certifying water meters for commercial and billing use. Secondary users include designers of test rigs, procurement teams specifying acceptance tests, and standards committees adopting or referencing ISO 4064 series requirements.

Related standards

Directly related parts of the ISO 4064 series (for example ISO 4064-1:2024 — general/metrological requirements, ISO 4064-3:2024 — installation/test overlaps) and ISO 4064-4:2024 (non-metrological requirements) are companion documents intended to be used together for full conformity assessment and national adoption. The document aligns with OIML R 49 series references for international type certification.

Keywords

water meter, potable water, hot water, test methods, type evaluation, initial verification, metrology, flow measurement, OIML, ISO 4064

FAQ

Q: What is this standard?

A: ISO 4064-2:2024 is the part of the ISO 4064 series that specifies test methods for type evaluation and initial verification of water meters for cold potable and hot water, providing detailed procedures, equipment and acceptance criteria for metrological testing.

Q: What does it cover?

A: It covers the test programme, test equipment requirements, test sequences and acceptance criteria for complete meters and for separate measurement transducers and calculators where applicable (including environmental and durability testing relevant to meter performance).

Q: Who typically uses it?

A: Meter manufacturers, accredited test laboratories, conformity assessment bodies, utilities, national metrology institutes and regulatory authorities use this standard to assess and certify water meter performance for commercial use.

Q: Is it current or superseded?

A: ISO 4064-2:2024 is the current published edition (edition 5, published December 2024) and replaces earlier editions such as ISO 4064-2:2014.

Q: Is it part of a series?

A: Yes — it is Part 2 of the ISO 4064 series. Other parts (for example Part 1 — general/metrological requirements, Part 3 and Part 4 — non-metrological requirements) are intended to be used together for full specification and conformity assessment of water meters.

Q: What are the key keywords?

A: Water meter, test methods, type evaluation, initial verification, flow measurement, potable water, metrological performance, OIML, ISO 4064.