Armada Technologies
Pro900 LOCATOR USER GUIDE
15
of your locate. Once the valve is located, verify that it is indeed your
target either manually, with the Pro48, or from the controller.
There may be more than one valve on the cable being traced. You may
wish to continue past the first valve located to determine if other valves
are also located on this wire.
Broadcast Mode
–
Broadcast mode is connectionless and different
from using the direct clip-on method of connection that has previously
been discussed. It is not as precise or strong as direct connecting, but
when access to cables is limited or just a quick scan is required,
Broadcast Mode can be very useful.
Broadcast mode is excellent for finding telephone or cable TV lines. It is
less useful with wires attached to solenoids. The principle in use with
Broadcast mode is AC induction. On ordinary wires, that works well.
And it can work for sprinkler wire but the solenoid sometimes has to be
eliminated from the circuit. This can be done by disconnecting the
solenoid and grounding the wire manually. The problem is that the
solenoid acts as a signal dampener with AC inductance. By removing
the solenoid from the circuit, you can find sprinkler wires in broadcast
mode. Deactivated 2-Wire systems do not have this issue and are
traceable as they exist in the ground.
Broadcast mode uses an inductive antenna located in the transmitter
case to broadcast a signal around the case in an approximately 25 foot
radius in all directions. It allows the user to transmit or induce signal
from the transmitter directly into the ground. Any grounded metallic
cable or pipe traveling through this electromagnetic field will pick up at
least some of the tracing signal, making that conductor traceable with
the wand.
Place the transmitter on the ground over the cable you wish to trace and
select Broadcast to begin. A vertical position of the case increases the
power induced into the ground. The transmitter is now inducing signal
approximately 20 to 25 feet from it, and energizing any conductors in
that field. You may now trace any conductor that has picked up that
signal.
