APPLICATIONS
Fiber Length Measurement.
The VOLT uses a “round robin” method of length
measurement. This method requires two fibers from the same fiber cable to be looped
back at one end with a patch cord. Light is injected into one of the fibers by the
transmitter and is received by the detector connected to the other fiber. The round
trip travel time is converted into length in kilometers and divided by two to arrive at the
length of the fiber cable. It is not necessary to test each fiber for length; the length
measurement applies to all fibers in the cable.
Visual Fiber Identification.
The VOLT provides a flashing mode for easy visual
fiber identification. Fibers are identified by locating the fiber end with the flashing red
light on the opposite end of the fiber cable. This is useful for locating fibers that are
marked incorrectly or not marked at all.
Visual Fault Location.
In Continuous Wave Mode, a steady beam of ultra-bright red
laser light is injected into the fiber. If this light encounters a break or microbend in the
fiber, the light will be redirected into the buffer. If the break or microbend is severe
enough, this light will be visible through the fiber jacket, informing the user of a break
or microbend in the fiber.
NEVER LOOK INTO A LIGHT SOURCE OR THE END OF A
FIBER THAT MAY BE ENERGIZED BY A SOURCE!
NEVER LOOK INTO A LIGHT SOURCE OR THE END OF A
FIBER THAT MAY BE ENERGIZED BY A SOURCE!
OPERATION
Fiber Length Measurement (
Figure 1 - Length Testing Configuration - Page 4
)
(1)
On one end of the fiber cable, loop back two of the fibers with one of the patch
cords.
(2)
On the other end of the fiber cable, connect one patch cord to each of the
fibers being used for the test. Connect the other end of the patch cords to the
receiver and transmitter ports on the VOLT.
(3)
Power ON the VOLT into length test mode by flipping the switch to the left.
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