Functions as a visual fault locator up to
5 Kilometers and
length tests multimode or singlemode fiber up to 1.5 Kilometers !
Most quality VFL's will go this distance.
However at extreme distances like this the "fault finding"
capability is reduced to fiber identification only. At shorter "LAN"
distances high energy red laser light can be used to see breaks in fiber
behind patch panels (hence the name visual fault finder). But
be assured VOLT holds its own against any other brand name VFL!
Fiber installations are increasingly required to have fiber length
measurements to comply with bid requirements. Rather than purchase expensive
certification test sets, the VOLT can be added to an installer’s existing
fiber test kit for a fraction of the cost.
Optical length testers save time by eliminating the need to measure fiber by
the cable jacket. Fiber links may also go through multiple cross-connects or
have splices in the middle, thereby making jacket markings invalid. Optical
measurement of fiber produces accurate results without the need for jacket
markings.
Optical measurement also saves time by eliminating the need to estimate the
length of the fiber run with a measuring wheel. This method is especially
troublesome and inaccurate in networks that traverse walls, are in a star
topology, or contain riser cables.
The VOLT uses a "round-robin" method of measuring fiber length.
This is accomplished by looping back two fibers at one end of the fiber run. The
round trip time that the light takes to travel through the fibers is converted
to length in kilometers, then divided by two to show the length of the fiber
cable. There is no need to measure the length of all the fibers; the length
measurement can be applied to all fibers in the cable.
