Textron Company GREENLEE 501 Tracker II Manuel D'instructions page 7

501
Determining Depth
Mark the ground directly over the path. (See Fig. 1) Hold
the receiver at a 45-degree angle close to the ground.
(See Fig. 2) Maintain this angle and slowly move the
receiver away from the path opposite the handle. (See
Fig. 3) The tone will decrease to a minimum and then
increase again. Mark the spot where the signal is at its
minimum. The depth of the cable will be the distance
between the two points marked.
Locating the End of an Open Cable
Follow the peak receiver indications as outlined in the
"Operating Receiver" section. Reception of the signal
will diminish rapidly and be lost once past the end of the
cable. (See Fig. 4)
Fig. 4. Locating the End
Note: These results may not be achieved if the faulted
of Open Cable
cable occupies a common trench that is congested with
other wires or cables.
Locating Underground Cable Splices
Locate and mark cable path as described in the
"Locating Path" section of this practice. Place 501
receiver antenna parallel to cable path. (See Fig. 5)
Keeping the receiver antenna parallel with the cable,
proceed down the cable path. Watch and listen for
increases in signal (peaks). (See Fig. 6)
When the increase in signal is seen, check to see if it
continues to the left or right of the cable path. A signal
that continues out to either side of the cable path is
Fig. 5. Signal Over Cable
a drop wire or branch cable. Mark these paths. (See
with No Splice
Figures 7 & 8)
A peak in signal without a continued path indicates the presence of a splice. Mark
this point. (See Fig. 6)
A branch splice will peak over the cable path, and then a peak can be followed over
the path of the branch cable. (See Fig. 7)
Note: The same signal can be produced by a drop wire running parallel to the cable
from a splice at the point it turns 90° from the cable path.
Fig. 6. Signal Changes Over Splice Fig. 7. Signal Over
Branch Splice
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