ISO 4064-3:2014

Overview

ISO 4064-3:2014 - “Water meters for cold potable water and hot water - Part 3: Test report format” specifies a standardized test report format to be used together with ISO 4064-1:2014 (metrological and technical requirements) and ISO 4064-2:2014 (test methods) for water meters. This fourth edition (identical to OIML R 49-3:2013) defines the structure, fields and checklists for type evaluation and initial verification reports for mechanical, electronic and separable water‑meter components.

Keywords: ISO 4064-3, water meter test report format, OIML R 49-3, water meters, cold potable water, hot water, type evaluation, initial verification.

Key topics and technical requirements

ISO 4064-3 focuses on the format and content of test reports rather than on new test procedures. Main elements include:

• Scope and normative references linking to ISO 4064‑1 and ISO 4064‑2.
• Terms, definitions and symbols used in reports (for example: + = pass, − = fail, EUT = equipment under test).
• Type evaluation report template (Clause 4) covering:
  • Applicant, authorized representative, and testing laboratory identification.
  • Model submission checklist (mechanical, electronic, combined, separable units).
  • Detailed type information: measuring principle, accuracy class, temperature class, environmental class, electromagnetic environment.
  • Maximum admissible temperature and pressure, orientation limits, and installation details (mechanical and electrical).
  • EUT testing requirements and category/case per ISO 4064‑2.
  • Checklists and pass/fail tables for examinations and performance tests.
• Initial verification report template (Clause 5) and example tables for separable units.
• Annexes: normative lists of documents concerning the type (Annex A) and a listing of test equipment used (Annex B).

Practical applications

Implementing ISO 4064-3 brings practical benefits:

• Consistent, complete test reports that ease peer review, certification and regulatory acceptance.
• Streamlined type evaluation and initial verification across manufacturers, test laboratories and conformity assessment bodies.
• Clear documentation for legal metrology, procurement, and installation records.
• Interoperability for separable calculators, sensors and supplementary electronic devices through standardized report fields.

Who should use this standard

• Water meter manufacturers preparing type approval dossiers
• Accredited testing and calibration laboratories
• National metrology institutes and legal metrology authorities
• Conformity assessment bodies and certification schemes (including OIML certificate system)
• Utilities and procurement teams requiring standardized test documentation

Related standards

• ISO 4064‑1:2014 - Metrological and technical requirements
• ISO 4064‑2:2014 - Test methods
• OIML R 49 series (corresponding legal metrology guidance)

Using ISO 4064-3 helps ensure test reports are complete, auditable and aligned with international metrological and legal‑metrology requirements for water meters.