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FAULT FINDER
The Fault Finder can also be used to check the condition of ceramic ferrules. A
fiber break inside, or past, the ferrule will make it glow, as shown above. If the
entire connector glows, it is definitely bad.
A glowing ferrule can also indicate a bad endface polish. If the endface polish is
bad, light in the fiber will be reflected internally and will be visible through the
ferrule, as shown above.
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