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3 Using the vLoc3-5000
3.4 Locating Active Signals
These instructions assume that the Classic Screen is selected and Peak with Arrows mode is selected for the antenna
configuration.
1. With a transmitter, apply an active locate signal to the line.
2. Set the receiver to Peak with Arrows
3. Match the frequency of the receiver to that of the transmitter.
Note that the screen will now show the addition of a compass (line direction indicator). In the presence of a locate signal the
compass will align itself parallel to the line being located. The compass helps to ensure that the operator is aware of the direction
of the line.
49.8
512Hz
25dB
25.4mA
0.63m
Hold the locator vertically and rotate it on its axis until the compass indicates Forward/Back, as shown above.
Adjust the sensitivity control so that the display indicates approximately 50%. Keeping the vLoc3 receiver vertical move to the
side slightly. If the bar graph increases, you are moving toward the line. If it decreases, you are walking away from it. Move
toward the line as indicated by the direction arrows until a maximum signal is achieved. It may be necessary to reduce the
sensitivity to keep the bar graph on the scale. This is a normal occurrence and should be expected. Try to keep the vLoc3
receiver vertical and avoid swinging it, as this may create false readings.
Move the locator side to side to ensure a maximum signal is detected. Use the peak level indicator to assist.
With the maximum signal found and the compass running Forward/Back the vLoc3 receiver is now directly over the line and
exactly across it.
If the signal is not distorted and the maximum signal's position will coincide with the position as indicated by the arrows. If these
two positions do not agree it may be because there is signal distortion. Treat the results with caution.
Continue to trace the line to its destination or source.
If you have selected the Omni Peak antenna configuration arrows will not appear on either side of the compass. This is because
when in Omni mode the line can be detected from any direction.
When in a locate screen, pressing and holding the “
f
” key will bring up the frequency table.
Power 50
Power 60
Radio
491Hz
512Hz
8.19kHz
8KFF
9.82kHz
32.8kHz
Use the “+” and “-” keys to navigate quickly to the desired frequency. Press the “i” key to select a highlighted choice and return
to the locate screen.
