ISO 4064-1:2014

Overview

ISO 4064-1:2014 - Water meters for cold potable water and hot water: Part 1 - Metrological and technical requirements specifies the metrological and technical rules for water meters used in fully charged, closed conduits. It covers meters that indicate integrated volume and applies to mechanical, electrical/electronic, and hybrid meters as well as electronic ancillary devices. This edition is aligned with OIML R 49-1:2013 and forms the metrological/technical backbone of water meter type approval, verification and in-service use.

Key topics and technical requirements

ISO 4064-1:2014 defines terminology and requirements across these core areas:

• Terms and definitions for meter constituents (measurement transducer, sensor, calculator, indicating device), meter types (in-line, concentric, cartridge, combined) and ancillary devices.
• Metrological requirements including the defined flow quantities (Q1, Q2, Q3, Q4), accuracy classes and maximum permissible errors for indicated volume.
• Electronic meters and devices: functional and power-supply requirements, performance expectations and interfaces for electronic calculators and sensors.
• Technical requirements: materials and construction, adjustment and correction devices, rated operating conditions, pressure loss considerations, marking and inscriptions, indicating devices and protection.
• Metrological controls and conformity assessment: reference conditions, type evaluation and approval, initial verification and in-service checking procedures.
• Normative and informative annexes covering performance tests for electronic meters, checking facilities and permissible errors in service.

Practical applications and who uses this standard

ISO 4064-1:2014 is essential for stakeholders involved in water flow measurement and metrology:

• Manufacturers designing and producing cold and hot potable water meters to meet international metrological and technical requirements.
• Testing and calibration laboratories performing type evaluation, performance testing and initial verification.
• Regulatory and legal metrology authorities who adopt or reference the standard for national type approval and verification rules.
• Water utilities and installers specifying meters for billing, leakage control and network monitoring to ensure compliance and interoperability.
• Meter integrators and smart metering vendors implementing electronic calculators, communication interfaces and ancillary devices.

Related standards

• ISO 4064-2:2014 - Test methods (complements Part 1)
• ISO 4064-3:2014 - Test report format
• ISO 4064-4:2014 - Non-metrological requirements
• ISO 4064-5: Installation requirements
• OIML R 49 series (equivalent legal metrology guidance)

By following ISO 4064-1:2014, organizations ensure consistent metrological performance, legal compliance and reliable volume measurement for potable and hot water applications.