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This is the least preferred method of inducing signal onto a conductor because the signal is
broadcast through the soil and air and can be picked up by other conductors in the area. In this
mode the signal radiates from the antenna mounted on the transmitter case and couples to the
conductor by electromagnetic induction.
If no direct connect cable or Metroclamp is attached to the DIRECT/4820 CLAMP jack, the
transmitter automatically broadcasts the signal through the antenna mounted on the transmitter
case.
No ground connection is needed when a signal is induced onto the target conductor.
WARNING
Do not operate the transmitter in the Inductive Mode while it is resting on
or near a metal surface or large metal object. Incorrect test readings and
damage to the transmitter may result.
1. Position the transmitter over the buried conductor making sure that the transmitter is parallel
or in line directly over the targeted conductor.
2. When using the Inductive method, the receiver must be 35-50 ft. away from the transmitter
depending on how high the sensitivity is set. The higher the sensitivity, the farther from the
transmitter the receiver must be to avoid picking up the transmitter signal traveling through the air.
3. Continue your locate by following steps 4 through 11, Section 5.2 Direct Connection.
5.5
VM-480B 50/60Hz Power Line Locating
When locating a power line the VM-480B transmitter is not required as you are locating the power
line by tracking the path of the 50/60 current coming off the line (the line must be loaded).
This method gives a maximum (loud tone) signal. The VM-480B receiver is held in a vertical
position at right angles to the line for maximum signal. (Note the logical path of the line from the
source).
You will notice a different audio tone when using the 50/60Hz mode, this is normal.
50/60 Power Line Locating Operation:
1. Move the VM-480B receiver a few feet away from where you want to start searching.
2. Turn the receiver MODE Switch to “Passive 50/60Hz”.
3. Hold the receiver in a vertical position. Then adjust the SENSITIVITY knob to bring the needle
within the “SET” zone. If the meter does not adjust to “SET”, turn the SENSITIVITY knob
all the way to the right (clockwise) and/or move closer to the conductor. If you still cannot
adjust to the “SET” position, switch the RANGE knob to “HIGH”:, and then attempt to adjust
the SENSITIVITY to “SET”. (If no current is present you will be unable to adjust to “SET”).
4. Hold the receiver in an upright, vertical position with the face of the receiver facing you, and at
right angles to the targeted conductor.
5 Operation
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