KING 900 Manual De Instrucciones página 7

INSTRUCTION MANUAL
A general rule is the greater the damage to a cable, the greater the
drop off signal at the point of damage. Conversely minimal damage
or weak grounding will show little change. Small faults are sometimes
difficult to locate.
FINDING IRRIGATION SOLENOIDS AND VALVES
Connect the red lead of the transmitter to the station wire leading to
that valve and the black to ground stake. Operate the KING 900 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.
An alternate method starts by tracing and marking the wire path.
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 canceling of the closely 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.
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. 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 assure that
unwanted damage isn't a result of your locate.
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12 KING INNOVATION
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 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. 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 receiver.
Place the transmitter on the ground over the cable you wish to
trace and select Broadcast. 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.
Also note, when the user is within 20 to 25 feet of the transmitter,
you cannot trace a cable because the signal from the case itself will
overpower the induced cable signal. The user will always hear the
transmitter signal within 20 feet of the transmitter case.
The Broadcast mode does not have a power output adjustment on
the transmitter. In addition, remember that ALL conductors in the
ground that can pick up the signal will.
KING 900
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KING INNOVATION 13