Overview
IEC 61300-2-28:2013 is an international standard from the International Electrotechnical Commission (IEC) that defines test and measurement procedures to assess the corrosive effects of atmospheres polluted with sulphur dioxide (SO₂) on fibre optic interconnecting devices and passive components. This standard provides a comparative corrosion test methodology designed to evaluate how fibre optic devices respond to exposure in SO₂-polluted environments.
It is important to note that this test procedure is intended for comparative purposes only and does not predict actual device behavior during real-world use. The 2013 edition is a technical revision of the original 1995 edition, with key updates in testing procedure and severity levels.
Key Topics
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Scope and Purpose
The standard targets the evaluation of fibre optic components' resistance to corrosion caused by sulphur dioxide atmospheres. It focuses on accelerated testing for comparative analysis rather than predictive environmental performance.
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Test Apparatus
The test requires a controlled chamber that simulates SO₂-polluted atmospheric conditions using a mixture of air and sulphur dioxide, in accordance with IEC 60068-2-42, Test Kc. The chamber must prevent specimen condensation and ensure uniform exposure by moving specimens or stirring the atmosphere gently.
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Testing Procedure
The test flow involves:
- Preconditioning specimens under standard atmospheric conditions
- Placement and connection inside the corrosion chamber
- Exposure to the SO₂ atmosphere under controlled temperature (~25°C), relative humidity (
75%), and gas concentration ((25 ± 5)×10⁻⁶ vol/vol SO₂) for a defined duration (commonly 4 days)
- Recovery phase under standard conditions
- Visual examination and performance measurements post-exposure to detect damage or degradation
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Severity and Exposure Conditions
Exposure severity is defined mainly by the duration of the test and environmental parameters inside the chamber. Table 1 in the standard outlines preferred parameters for Category E testing:
- Sulphur dioxide concentration: (25 ± 5) × 10⁻⁶ vol/vol
- Temperature: 25 °C ± 2 °C
- Relative Humidity: ~75%, with acceptable range 70-80%
- Duration: 4 days
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Guidance on Specification
For practical application, product specifications must clearly define:
- Test severity and duration
- Specimen configuration (mated/unmated, operational/non-operational)
- Preconditioning and recovery steps
- Performance criteria for initial, during-test, and final examinations
- Any deviations or additional pass/fail criteria
Applications
IEC 61300-2-28:2013 is essential for manufacturers and quality engineers involved in the design, testing, and certification of fibre optic interconnecting devices and passive components that might be exposed to industrial environments with corrosive sulphur dioxide atmospheres. Typical applications include:
- Fibre optic connectors and adapters used in industrial facilities where pollutant gases are prevalent
- Passive optical components installed in outdoor or harsh environments susceptible to sulphur oxides
- Comparative material and design assessments to improve corrosion resistance of fibre optic devices
- Verification of component endurance against gaseous pollutants in product development and quality control programs
Implementing this test supports compliance with international standards and helps ensure long-term reliability and performance in corrosive environments.
Related Standards
- IEC 60068-2-42: Environmental testing - Sulphur dioxide test for contacts and connections – Defines the test chamber and atmosphere generation method directly referenced in IEC 61300-2-28.
- IEC 61300-1: Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 1: General and guidance – Provides general testing principles applicable across fibre optic tests.
- IEC 61300-3-1: Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 3-1: Examinations and measurements – Visual examination – Specifies protocols for visual inspection of fibre optic specimens after testing.
By aligning with these complementary standards, organizations can conduct robust, standardized corrosion testing and ensure global interoperability and product quality in the fibre optics industry.
Keywords: IEC 61300-2-28, fibre optic corrosion test, sulphur dioxide atmosphere, fibre optic interconnecting devices, passive optical components, corrosion testing standards, industrial environment testing, fibre optic reliability, IEC corrosion test, SO₂ contaminated atmosphere.
Open preview (PDF)Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 2-28: Tests - Corrosive atmosphere (sulphur dioxide)
