RIDGID NaviTrack Scout Übersetzung Der Originalbetriebsanleitung Seite 12

NaviTrack Scout
6. Tracing a Line with Scout
The Scout can also be used to trace a pipe or line so that the ground above
it can be marked. This identifies the line's location so that it can be avoided
during a dig or exposed for repair or replacement. The Scout can locate
energized lines with a variety of frequencies or it can be used passively to
conduct a sweep to locate any long conductors carrying signals.
Underground lines are energized with a line transmitter. This active signal is
then traced using a receiver such as the Scout.
1. Attach the line transmitter to the line according to the manufacturer's
instructions.
A "transmitter" is a generic name used for anything that generates a locatable
signal. It is used to describe a sonde as well as the device that is used to energize
a cable or pipe.
2. Match the frequency used on the transmitter with the same frequency
on the Scout. Be sure it has a line trace icon ~. Push the main menu
button to return to the locate screen.
3. When beginning the trace it is recommended that signal strength be
observed first to see if it drops when the Scout is pulled away. Point the
mast at the leads or the transmitter itself if using inductive mode. Over
the line it should peak and drop off on either side. If the signal strength
and lines on the screen DO NOT agree then the signal may be distorted.
4. When tracing, the way the pipe or cable is running will be shown on
the screen with 2 solid lines. Keeping the lines on the center indicates
that the Scout is tracing the line underground. If the line moves off to
the left or right then move the Scout to get the line back on center. The
signal emitted from a line is strongest directly over that line. If that is
not the case then distortion is present.
When using a line trace frequency there are two lines on the screen.
NOTE
When using a sonde frequency the Equator is a single line.
Care should be taken to watch for signal interference that may
CAUTION
give inaccurate readings. Depth readings should be taken as estimates and
actual depths should be verified by exposing the line before digging.
5. When beginning the trace it is recommended that signal strength be
observed first to see if it drops when the Scout is pulled away. Point the
mast at the leads or the transmitter itself if using inductive mode. Over
the line it should peak and drop off on either side. If the signal strength
and lines on the screen DO NOT agree then the signal may be distorted.
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6.1 Tracing a Passive AC Line
In passive mode the Scout senses alternating current, or AC fields. Buried
power lines typically do not emit any traceable signal unless power is
flowing in the wires. For example street lights that are turned off are hard
to trace passively.
1. Select a Passive AC Trace Frequency with the passive line trace icon ~.
2. The Scout has two (2) passive AC tracing frequencies that are standard.
They are 50 Hz and 60 Hz.
6.2 Operating Tips for Line Tracing
• When the lines are not centered on the map, but signal
strength is maximized, distortion is present!
a. Try changing the frequency used to a lower one.
b. Move the ground stake position away from the line to be traced.
c. Make sure that the line is not commonly bonded to another utility.
• If the lines will not center or if they move across the screen inexplicably,
then the Scout may not be receiving a clear signal.
a. Check the transmitter to be sure that it is operating and well
grounded.
b. Test the circuit by pointing the lower antenna at either transmitter
lead.
c. Check that the Scout and transmitter are operating on the same
frequency.
d. Try different frequencies, starting with the lowest, until the line can
be picked up dependably.
• Current flows best from the smallest lines to the largest (lowest
resistance) lines. An example would be tracing a pipe from the house to
the street.
• While tracing, the signal should maximize, and the depth minimize,
at the same place where the lines centers on the display. If this is not
the case, the utility may be turning or other coupled signals may be
present.
• Higher frequencies bleed over more but may be needed to jump breaks
in tracer wires or go over insulating couplers.
• When using the transmitter inductively be sure to begin the locate
10/15m away to avoid "air coupling". This is where the Scout will pick
up the signal from the transmitter directly and not from the line to be
traced.
If the lines will not center or if they move across the screen inexplicably, then
the Scout may not be receiving a clear signal.
a. The ground is level.
b. The line is level.
c. The Scout Locator is above ground level.
d. The Scout antenna mast is held approximately vertical.
• If these conditions are not met, pay close attention to maximizing
signal strength. In general, if the Scout is within about two "depths" of
the line, the map will be useful and accurate. Be aware of this when
using the micro map if the target or line is very shallow. The useful
search area in micro map can be small if the line is extremely shallow.