Glomar C.A.T4 Handbuch Seite 7

scanning an area before digging
An initial sweep using Avoidance Mode is recommended, followed by
detailed scans using the other modes. Use the Genny mode for Depth
estimation once a pipe or cable has been detected (C.A.T4+ and
eC.A.T4+ only).
Turn the Function Switch to (Avoidance Mode) to sweep the area
for cables or pipes radiating Genny, Power or Radio signals. Turn the
sensitivity control to maximum before starting. If the signal bargraph
does not move from maximum, reduce the sensitivity control so that
the bargraph is below half-way before starting.
Sweep the area to be excavated with a steady and deliberate motion.
Begin by walking the perimeter of the proposed excavation site.
Then walk the length of the of the excavation site, moving across the
width in parallel sweeps around 0.5 metres apart. If using a Genny in
induction mode, position the Genny as shown so that the chevrons on
the C.A.T4 are inline with the chevrons of the Genny4.
Then sweep across the width of the excavation site, moving up the
length. If using a Genny in induction mode, position the Genny as
shown.
If a cable or pipe is located, first establish the direction of the cable or
pipe, then trace it across the area to be excavated, marking if required.
Then resume sweeping over the excavation site.
0.5 metres
Minimum
10 metres
0.5 metres
Minimum 10 metres
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active search using Induction – finding parallel pipes
and cables
Placing the Genny4 on its side swamps an area with Genny signal.
Note that signal is not transmitted directly below the Genny4 in this
orientation, so repeat the exercise with the Genny4 moved to the side
by at least 1m. Alternatively, use a two man technique to search an
area for buried utilities as shown.
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