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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 VLF-280 is a hand-held battery powered stabilised
fibre optic laser source that emits visible (red) light at 650 nm. It'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). It 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 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 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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