Operation
C.
Locating & Tracking Buried Irrigation or Garden Lighting Cables
Once the transmitter is attached to the cable and the ground or common as in
“B” above, ensure the transmitter switch is in the “Cable Scan” position and
turn the “Thumb Wheel” switch to high tone.
Locate approximately the route of the cables and swing the receiver antenna
(8) in a pendulum type action at right angles to the cable path starting at least
3 metres away from the transmitter.
As the receiver antenna swings past the underground cable, a tone will be heard
on either side of the cable path with a “null” or no noise directly over the cable.
Proceed along the path of the cable following the “null” direction.
You can adjust the transmitter and receiver controls to move further distances
between the two.
You can also use the ear phones to assist with detecting the null position.
E. Detecting A Cable Break
A cable break will be detected by the loss of signal in the receiver antenna.
D. Measuring Depth
Once the path has been determind,
mark the ground at a null point along
the path.
Hold the Receiver antenna at a
45-degree angle to the ground and
move at a right angle away from the
path of the wire until another null is
found. Mark this point.
the distance between the two marks
is the approximate depth of the wire.
(fig. 1)
(Fig.1) Measuring Depth
Cable or Pipe
Null
Points
Antenna
Receiver
45°
Ground Level
4
Operation
