IEC 60051-9:2019

Overview

IEC 60051-9:2019 is an international standard published by the International Electrotechnical Commission (IEC) that specifies recommended test methods for direct acting indicating analogue electrical measuring instruments and their accessories. This standard provides essential guidance on applicable test methods and performance requirements for test equipment used to evaluate analogue electrical measuring instruments. It is a key reference for manufacturers, quality control engineers, and testing laboratories aiming to ensure instrument accuracy, reliability, and compliance with international norms.

This fifth edition, a technical revision of the previous 1988 edition, introduces updated performance requirements for test equipment and refines references to relevant standards. It excludes special purpose instruments and accessories already covered by other IEC standards.

Key Topics

• Scope and Application: Covers direct acting indicating analogue electrical measuring instruments and related accessories, excluding special purpose devices.
• Test Equipment Requirements: Outlines necessary accuracy and stability for test instruments, including:
  • Intrinsic uncertainty measurement equipment must have maximum instrumental uncertainty of 0.2 times the class index of the instrument under test.
  • Overload, self-heating, damping, overshoot, and response time tests require test equipment with settings uncertainty within ±1%.
  • Phase shift test equipment demands uncertainties of ±1° or better for class index ≥ 0.5 and ±0.1° or better for class index < 0.5.
  • Temperature setting devices must maintain uncertainties within ±1°C for instruments of class index ≤ 0.3, and ±2°C for above.
• Recommended Test Methods:
  • Intrinsic uncertainty determination.
  • Damping and response evaluation.
  • Humidity tests.
  • Tests with distorted AC quantities.
  • Shock and vibration assessments.
  • External magnetic and electric field exposure.
  • Electrical safety verification.
  • Electromagnetic compatibility (EMC) testing.
• Normative References: Includes IEC 60051-1:2016 for common definitions and other standards covering environmental testing, EMC, safety, and instrumentation specifics.

Applications

IEC 60051-9:2019 is fundamental for:

• Manufacturing: Establishing robust quality assurance processes by applying standardized test methods to analogue measurement instruments.
• Calibration Laboratories: Ensuring measurement devices meet international accuracy and performance benchmarks through calibrated test equipment.
• Compliance Testing: Verifying instrument performance against IEC standards before market release, maintaining global interoperability and safety compliance.
• Research and Development: Designing and refining analogue electrical measuring devices with validated test procedures enhancing product reliability.
• Maintenance and Troubleshooting: Conducting repeated tests to check for instrument degradation or nonconformity, ensuring ongoing instrument integrity.

This standard supports industries like power generation, electrical engineering, instrumentation manufacturing, and laboratory testing environments reliant on accurate analogue measurement tools.

Related Standards

• IEC 60051 Series: Covers varying classes of direct acting indicating analogue electrical measuring instruments, with Part 1 detailing definitions and general requirements.
• IEC 60068-2-6: Environmental testing guidelines, particularly vibration tests.
• IEC 61000-4-8: EMC testing for power frequency magnetic field immunity.
• IEC 61010 Series: Safety requirements for electrical equipment used in measurement, control, and laboratory environments.
• IEC 61326 Series: EMC requirements applicable to sensitive measuring equipment.
• ISO/IEC Directives, Part 2: Standardization procedures followed in drafting IEC documents.

Using IEC 60051-9:2019 together with these related standards ensures comprehensive evaluation of analogue electrical measuring instruments under realistic operational and environmental conditions.

Keywords: IEC 60051-9, analogue electrical measuring instruments, test methods, intrinsic uncertainty, damping tests, phase shift measurement, overload testing, EMC, electrical safety, calibration, instrumental performance, electrical measurement standards.