Overview
IEC 60512-19-3:1997 is an international standard established by the International Electrotechnical Commission (IEC) that specifies a test method for evaluating the fluid resistance of electromechanical components used in electronic equipment. This part of IEC 60512 focuses on chemical resistance tests, specifically assessing the effects of accidental exposure to fluids and lubricants on electrical connecting devices.
The standard is essential for manufacturers and testing laboratories aiming to ensure the durability and reliability of connectors and similar electromechanical components when exposed to potentially harmful fluids during operation or in accident scenarios.
Key Topics
Scope and Purpose
- Defines a standardized test procedure to simulate accidental fluid exposure.
- Tests impact on electrical connecting devices used in electronic equipment.
- Applies to components within the scope of IEC technical committee 48, with possible use for similar devices when referenced in detailed specifications.
Test Methodology
- The test involves conditioning cycles comprising three main phases:
- Immersion or Application:
- For liquids: Connectors are unmated and immersed for 15–20 minutes at specified temperature.
- For greases: Connectors are mated, grease applied in thin layers, then kept at temperature for 15–20 minutes.
- Storage:
- Specimens are stored under normal atmospheric conditions for 7 ± 0.5 hours.
- Ageing:
- Mated specimens are placed in an oven with air circulation at a specified temperature (not less than +65°C unless otherwise specified) for 16 ± 0.5 hours.
- Each cycle lasts 24 hours and is repeated a total of 5 times unless otherwise specified.
Specimen Preparation
- Connectors are fitted with all normal accessories and wired according to particular specifications.
- Unwired contact cavities must be sealed with filler plugs to simulate realistic operational conditions.
Safety Measures
- When the test fluid’s temperature exceeds its flash point, appropriate safety precautions must be implemented.
Normative References
- Relies on IEC 60512-2 for general examination and electrical testing procedures, such as contact resistance and insulation tests.
Applications
- Connector Manufacturers: Assure product quality and compliance with chemical resistance requirements.
- Quality Assurance Labs: Standardize test practices to verify connector durability and resistance to fluids.
- Electronics Design Engineers: Select components suitable for environments prone to fluid exposure, including lubricants or accidental spills.
- Maintenance and Safety Teams: Understand component degradation risks and validate specifications for replacement or protection needs.
This standard supports industries relying on reliable electronic connections under harsh operational conditions such as automotive, aerospace, industrial machinery, and consumer electronics.
Related Standards
- IEC 60512-2: Basic testing procedures including electrical continuity and insulation testing pertinent to the initial and final measurements in the fluid resistance test.
- IEC 60050: International Electrotechnical Vocabulary, providing harmonized terminology for electrotechnical components.
- IEC 60027, IEC 60417, IEC 60617: Standards for graphical and letter symbols used in electrical technology, useful for documenting and interpreting test setups and results.
By adhering to IEC 60512-19-3, stakeholders ensure a uniform approach for assessing the chemical resistance of electromechanical connectors to fluids, enhancing product reliability and extending service life in demanding electronic equipment environments.
Open preview (PDF)Electromechanical components for electronic equipment - Basic testing procedures and measuring methods - Part 19: Chemical resistance tests - Section 3: Test 19c - Fluid resistance
