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 Features
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Operates with singlemode or multimode fibre |
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Universal 2.5 mm connector |
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650 nm wavelength |
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Replaceable split sleeve |
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Compact size |
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100 hour battery life with 2 AA Alkaline batteries |
The VFL-280 Visual Fault Locator is a hand-held battery
powered stabilised fibre optic laser source that emits visible (red) light at
650 nm. The Visual Fault Locator's intended function is to allow an operator to
identify the exact location of a break, microbend, or other discontinuity in a
fibre optic cable. As the radiation is visible, light emanating from a break or
microbend enables the user to locate the exact position of a fault. This can be
done even at very short distances that would not be detectable by conventional
means such as an Optical Time-Domain Reflectometer, (OTDR). The Visual Fault
Locator is also useful for identifying a particular fibre in a cable by
exciting the fibre to be located with visible radiation.
The fibre to be tested is connected to the source by a
standard 2.5 mm fibre optic connector. The source may be used in one of two
modes, modulated or continuous. In the modulated mode the laser is turned on
and off at 6 Hz. This mode is helpful in enabling the user to identify the
source radiation in the presence of high levels of ambient light. It also aids
in conserving battery life.
The VFL-280 Visual Fault Locator has a power saving
feature and will power down after twenty minutes. This feature is easily
deactivated by simply depressing the I/O key for three seconds when powering up
the unit.
The usable range of the fault locator depends on the
fibre, the intended use, such as fault finding or fibre identifying, fibre
type, the jacketing of the cable and the loss incurred at the fault. Several
hundred meters to 1 or 2 Km are typical for singlemode fibre fault location,
however fibre identification can be made at greater distances.
Specifications
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Output power: 1 mW max. |
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Wavelength: 850 nm +/-5 nm |
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Pulse rate: 6 Hz |
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Emission indicator: LED |
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Standard F/O connector: Universal 2.5 mm ferule |
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Duty cycle: 50% |
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Batteries: 2 x AA alkaline |
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Battery life: >100 hr |
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Dimensions: 10 x 6.5 x 2.8 cm |
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Weight: 120 gm |
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Operating temperature: -10 to + 50 C |
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Storage temperature: 30 to 60 C |
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Auto shut off: 30 min |
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