FS22DI
MEASURING EXAMPLES
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4.3
Common Measuring Difficulties
There may be the possibility of having measuring malfunctions due to problems in the
sensing network or optical connections. A list of some of the usual problems is described
below with the explanation for their occurrence and correction.
4.3.1
Dirty Connector
It is very important that the connectors are cleaned prior to any connection. Otherwise,
dust and moister can be deposited in the interrogator's optical adaptors, which will com
promise measurements. In
a picture of a magnified connector is presented. The
dark gray circle corresponds to the fiber cladding and the small light gray circle is the
core of the fiber. One picture of a clean connector and one picture of a dirty connector
are presented.
Clean connector
Dirty connector
Fig. 4.6
Magnified Clean vs Dirty connector
The most common effect of dirt on the connections is a large amount of broad band light
being reflected at the connection, in both directions, meaning that the dynamic range for
measurements becomes smaller.
