Load coils
Load coils produce positive (upward going) reflections. Generally, TDR’s
can not ‘see’ beyond the first loading coil. For fault location beyond the
loading coil, the TDR should be connected to another point following the
coil.
Wet section
The presence of water causes a capacitance increase. Therefore, there
are two pulses: one from the beginning, the other from the end of the wet
section.
Screen fault
If the metallic screen of the cable is broken (interrupted), the position of
the break can be located by connecting the test leads to the screen and
to as many conductors as possible. The screen must not be grounded.
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