Tabla de contenido
Publicidad
A. Operation
Plug the two antenna leads into the 501T transmitter. Turn transmitter to full
power, place the transmitter in its compartment with the leads facing to the rear
of the case. Close the carrying case. (See Fig. 14) Place activated antenna on
the ground parallel with and approximately one foot to either side of the utility
to be tracked. (See Fig. 14) Radius the area approximately 20 feet away from
the Inductive Antenna with the Tracker receiver to determine the path. Proceed
down the cable path following the peak signal.
NOTE: AS PROGRESS IS MADE DOWN THE CABLE PATH, GRADUALINCREASES IN TH E
GAIN CONTROL OF THE RECEIVER WILL BE NECESSARY TO MAINTA I N
R E C E P T I O N .
Eventually reception will be effectively lost, even at the maximum transmitter
setting. Retrieve the antenna and place it at the point where the signal was last
e ffectively received.
Resume tracking the line and repeat the relocation of the Inductive Antenna as
necessary.
B. Searching For Underground Utilities
The activated Inductive Antenna will radiate the tracking signal through the
ground surface and the target utility will receive the signal and eff e c t i v e l y
transmit it down the path.
One craftsperson will carry the antenna case close to the ground and move in
a specified direction.
Another craftsperson will hold the receiver (501R) at a distance of at least 20
ft. away and simultaneously move parallel with the first person.
When the receiver is directly over a utility, strong signal will be detected. (See
Fig. 16)
Keep in mind that even though this is the easiest and most convenient way to
locate, caution should be used because the radiated signal may be induced
into the other utilities.
C. Application Tips
Remember that any conductive line in the immediate area can collect the
radiated signal. In locations such as trailer parks or other areas with congested
facilities, minor reductions in the transmitter output level may eliminate
unnecessary signal bleed.
The very nature of the Inductive Antenna may be a problem to the operator if
he is not prepared to pick up the tone from the antenna itself. Begin using the
receiver 20 feet or more away from the
antenna to avoid receiving signal on a
direct basis.
Fig. 14 applies to situations involving
shorter runs or work relatively close to the
antenna.
To achieve Maximum Distance, orient the
activated antenna parallel to the suspect
path and set the Tracker II case up on its
back, as shown in Fig. 15.
The Inductive Antenna is permanently
installed and is weather sealed; no
Fig.10 - Coupling Points
8
Publicidad
Tabla de contenido
