The Model F6240 Laser Fault Locator is commonly known as a VFL. The Model F6240 is an indispensable tool for finding breaks and tight bends in optical fibers. It operates on two 1.5V AA alkaline batteries keeping the overall size to a minimum while providing long battery life. The VFL output is from a 650nm laser providing visibility to 3 km.
The F6240 incorporates a fixed male MTRJ duplex receptacle, and independently launches -4dBm ( 400µW), 650nm visible red laser into channel A or channel B fibers for quick and convenient continuity testing. Unlike many VFLs today, the F6240 features a choice of continuous or modulated output, and a “low battery” indicator to alert the user when it is time to change batteries.
This single basic tool is one that all installers, and maintenance personnel should have in their tool kit. It is the most economical test tool for quickly verifying continuity, checking the validity of patch cables before or after installation, test and find breaks in LANs, verifying short lengths of installed fiber, or looking for cracked fiber in splice cases, bad connectors, tight bends in fiber cable, backbone breaks or anywhere light continuity needs checking.
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