Since the light used in fiber optic systems is infrared (IR) light, it is beyond the range of the human eye and cannot be seen. To solve these problems, a visual fault locator is needed. The Visual Fault Locator (VFL) is a device capable of locating breaks, bends, or cracks in. Or it could be caused by the quality of the connector itself, such as poor end-face geometry that doesn't pass the parameters defined by IEC PAS 61755-3 standards, including angle of the polish, fiber height, radius of curvature or apex offset. Note: Meant for use with polished, terminated fiber cables. Always insert and remove the fiber connector without bending the connector to avoid breaking. When it comes to testing fiber optic cables, a Visual Fault Locator (VFL) is an essential tool in your toolkit. Here is how the pen helps detect errors.
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