Troubleshooting and Maintenance
If there is a measurement problem, check if the sensing fiber is
correctly connected.
If you still have a problem, contact The Protectowire Company,
Inc. for support.
Check the sensing fiber
The sensor cable is verified in the “loss-trace” provided with a
FIBERSYSTEM 8000 instrument.
A typical loss-curve shows a continuous loss of signal power
over distance
Connections (plug-ins or splices) have to be seen as steps in
the loss-curve (as in the picture above at 400 m)
Changes to other fiber types can result in different gradient (in
picture dashed blue)
A fiber break results in a step to a low level in the loss-curve
(like -80 dB)
A typical connector loss is around 0.25 dB, a typical value for a
splice is around 0.05 dB (at about 1064 nm, 50 um multimode
fiber). For values higher than 0.4 dB (connector) or 0.1 dB
(splice), one should consider to clean, repair or substitute the
connector or to re-do the splice.
A bad connection may cause high reflections that may disturb the
measurement results in the proximity of the connection.
Connection of two fiber types with different properties may cause
a step in the loss trace (positive or negative, depending on the
fiber properties), which is not caused by the connector.
The Protectowire Company, Inc.
FIBERSYSTEM 8000 - Linear Heat
Series
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