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Data Centre

How to Use Visual Fault Locator (VFL) to Find Breaks in Fibre Cable?

How to Use Visual Fault Locator (VFL) to Find Breaks in Fibre Cable?

FS Official 2018-06-04

Visual fault locator (VFL) is a pen-type fibre optic cable tester. It can be used to trace the continuity of the optical fibres and find faults such as breaks, bad splices and tight and sharp bends in them by injecting the red light into fibre cables. Only with two batteries loaded, you can make a visual fault locator work.

Its working mode is very simple. Take fibre cables with SC connector and LC connector as an example. Connect the connector with the adapter in visual fault locator. If the red light escapes through the cable jacket, it means there is a break. If no breaks appear, it means the fibre cable is undamaged.

FS can offer a wide range of visual fault locators with various output powers and testing distances for choosing to support SC, FC, ST, LC and MU connectors. As for the fibre optical adapter, FS provides 2.5 mm and 1.25 mm diameter sizes for you. If you also want to measure fibre cable’s optical power and relative loss, you also can find tools, like handheld fibre optical light source and optical power metre in FS for help.


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