IEC 61340-2-3:2016

Overview - IEC 61340-2-3:2016 (Electrostatics: test methods for resistance/resistivity)

IEC 61340-2-3:2016 defines standardized test methods for measuring the electrical resistance and resistivity of solid materials intended to avoid electrostatic charge accumulation. The standard covers measurements where the measured resistance lies in the range 10 kΩ to 1 TΩ, and includes guidance on instrumentation, electrode assemblies, sample conditioning, test procedures and system verification. This edition (including the July 2023 corrigendum) clarifies instrumentation categories, adds an alternative electrode assembly for non‑planar or small products, and aligns resistivity formulae with common industry practice.

Key technical topics and requirements

• Measurement range: Designed for resistance values from 10 kΩ to 1 TΩ.
• Instrumentation categories: Distinguishes equipment for laboratory evaluation, acceptance testing, and compliance verification (periodic testing) to ensure appropriate accuracy and traceability.
• Electrode assemblies: Standard electrode setups for surface, volume, resistance-to-ground/groundable-point, and point‑to‑point tests; alternative electrode assembly for non‑planar or small structures.
• Test environment & conditioning: Specifies handling and environmental conditioning to reduce variability (temperature, humidity, sample equilibration).
• Test procedures: DC‑based resistance measurements are emphasized (to avoid AC reactance effects); procedures cover surface resistance, volume resistance, conversions to surface and volume resistivity, and methods for small/non‑planar samples using probe techniques.
• System verification: Fixtures and procedures for verifying measurement systems and ensuring repeatability/reproducibility across ranges.
• Data handling: Requirements for test reports including method, instrumentation, environmental conditions and measured values.
• Material behavior notes: Addresses polarization/charging effects in polymers and ion conductors - recommends reversing polarity and averaging values when electrification effects are observed.

Practical applications - who uses this standard

IEC 61340-2-3 is applicable to organizations involved in electrostatic discharge (ESD) control and materials evaluation, including:

• ESD program managers and QA engineers in electronics manufacturing
• Test laboratories and R&D teams evaluating conductive, dissipative, or insulating materials
• Manufacturers of ESD flooring, work surfaces, seating, packaging and components
• Compliance officers performing acceptance testing and periodic verification

Use cases include material selection, product acceptance, production quality control, and laboratory characterization of surface and volume resistivity.

Related standards

• Other parts of the IEC 61340 series (Electrostatics) - for broader ESD control practices and requirements.
• Complementary IEC/ISO measurement and calibration standards referenced in the IEC 61340 series for instrumentation and metrology (see the IEC publication for full normative references).

Keywords: IEC 61340-2-3, electrostatics, surface resistivity, volume resistivity, resistance test methods, ESD control, electrode assembly, compliance verification.