Locating a wire break
Step 2
Stand next to the transmitter. Set the dial of a portable AM radio to
the bottom of the AM band (560). Set the dial just off the station so
that you can clearly hear static. If there is no evidence of digging,
start at the point on the perimeter where the twisted pair divides into
a single loop wire.
Step 3
Hold the radio directly above and parallel to the wire. You will hear
the static. As you move the radio slightly to the left or right, you
will be able to track the route of the wire by listening to the static.
As long as the static remains fairly constant, you know that the wire
is intact below.
Step 4
As you approach the area of the break, the static will become very
faint. Stop. Dig up the loop wire. Tug firmly on the wire. One end
of the break should appear. Lay the excess wire straight out on the
ground and dig to where it ends. Once you have the other end of the
break you can proceed to fix the break.
Finding a break in the twisted pair wire
•
Unlike the loop wire, when the twisted pair is broken, it will generate a signal.
Stand at the transmitter. As before, set the dial of a portable AM radio to the
bottom of the AM band, just off the station, so that you can clearly hear static.
•
Start at the point where the twisted wire leaves the transmitter. Hold the radio
directly above and parallel to the wire. If the wire is broken, there will be a
signal or static, due to the fact that the cancellation of the signal no longer
exists. Follow the wire out to the point where the twisted wire divides into a
signal loop wire.
21
Summary of Contents for DG9000
Page 1: ...Revised May 2001 Installation Training Guide...
Page 9: ...Grounding to a Ground Rod 6...
Page 39: ...Notes 36...
Page 40: ...Notes 37...
Page 41: ...Notes 38...