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Plug the optional headset into the receiver if desired. Turn on the receiver
and point the antenna towards the transmitter to check both are operating as
normal. You should hear a pulsing tone through the speaker or headset and
see signal strength on the scale.
Operation
Locating a Wire Path
With the probe pointed towards
the ground, walk completely
around the transmitter location.
You will hear a peak as you
approach the path of the wire,
a distinct "null" directly over the
wire and another peak as you
pass to the other side of the wire.
Follow the "null"; moving the
antenna to either side of the wire
will cause the level of the tone
detected to increase. The null
allows you to follow the cable
precisely. See Figure 2.
Figure 2. Locating Wire Path
Finding Wire Breaks and Nicks in Insulation (ground leakage)
When attempting to find breaks and nicks, you should decrease the sensitivity of
the receiver when pointing it off to either side of the null. You will be able to notice
the change in signal intensity immediately. Do not allow the meter to "peg" (show
full-scale). This will greatly help in the fault locating process.
Note: The wire must have a path to
ground to be successfully located.
These paths exist in a great
majority of all direct buried wires
due to insulation imperfections,
nicks, and bad splices. If not, create
one by grounding the remote end.
• The end of a cut or broken wire
can be located by following the
path until the null becomes less
distinct or disappears and gives
way to a "hot spot". Beyond the
"hot spot", no null can be detected.
Back up until the null is detected,
and this will be the approximate
end of the broken wire. (Refer to
Figure 3.)
Figure 3. Locating End of Broken Wire
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521E Instruction Manual
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