Fiber optic cable reels are measured for length, optical performance, and mechanical properties before installation to ensure quality and proper deployment.Optical MeasurementsBefore installation, eac...
Before installation, each fiber on a reel should be tested for continuity, length, and attenuation. Continuity testing ensures the fiber is intact and free from breaks, while length measurement confirms the cable matches the specifications provided by the manufacturer . The optical attenuation coefficient is measured at user-specified wavelengths to verify that the fiber can transmit signals effectively over the intended distance . Common instruments include an Optical Time Domain Reflectometer (OTDR) for detailed inspection of fiber integrity and a light source with an optical power meter for simpler tests . These tests confirm that the cable has not been damaged during shipping or storage .
Fiber optic cable reels are also evaluated for mechanical properties, particularly during installation. A reel test can measure cable pulling tension and friction, which is critical for planning installation in ducts or conduits . In this test, the cable is wrapped around a wheel (typically 3 feet or 1 meter in diameter) to simulate bends and curves encountered in the field. The tension is measured as the cable moves, providing data on the coefficient of friction (COF) and helping to prevent damage during deployment . This method is widely recommended by Telcordia, IEC, and cable manufacturers.
Measuring a fiber optic cable reel involves verifying optical properties (continuity, length, attenuation) and mechanical characteristics (tension, friction) to ensure the cable meets design specifications and can be safely installed. Using tools like OTDRs, light sources, power meters, and reel test setups provides a comprehensive assessment of both the quality and deployability of the fiber optic cable .
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5.1 The fiber optic fiber reel should be stored in its upright position in an area with a flat, solid surface during storage.
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