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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. 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. We call this the 'balanced' method. 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 closely parallel wires until you are 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 exactly where the valve
solenoid is. Use a pointed probe to find the outline of the valve box before
excavating. This will ensure that unwanted damage isn't a result of your
locate. Once the valve is located, verify that it is indeed your target either
manually, with the Pro48, or from the controller.
Pro900™ LOCATOR USER GUIDE
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