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The first method is to connect the red lead of the transmitter to the
station wire leading to that valve and the black to ground as
described above. Operate the Pro800 and Pro800D as above and
begin your locate. When you reach the point where a
valve/solenoid is located, the signal will expand into a large
(approx. 2-4ft) diameter area of signal. Many times this signal
volume will get louder. This is your indication that you are over a
valve or solenoid.
The second method starts by tracing the wire path as previously
described. Irrigation valves are located in null mode only. Once
the wire path has been traced you must power the transmitter off,
remove the black lead from the earth ground and connect it to the
common wire. In the case of multiple common wires it is
suggested that you isolate and connect to the common wire that
services the target valve. Connecting to multiple commons will
work, however it weakens the signal response.
Power the transmitter on and adjust the output signal to suit your
needs. High power output is not necessary and will limit battery
life. It is advised that you once again point the receiver at the
transmitter to assure that both units are on and functioning
properly.
Slowly follow the pre-marked wire path. There will be an absence
of signal response due to cancelling of the parallel wires until you
near the valve. As you move closer to the valve the receiver will
begin making a chattering sound which will intensify and distort,
turn the volume down and take your time.
Even with the volume at its lowest setting the response of the
valve solenoid will be very loud. Pinpointing the exact location of
the solenoid is possible by decreasing the volume and taking your
time. The lower the volume is, the more accurate you can be.
Slowly start moving the receiver in an X pattern above the high
pitched area, continue reducing the volume while moving the tip of
the receiver closer to the ground. Between the proximity of the
receiver tip to the ground and the reduction in volume you can tell
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