9
Scanning an area before digging
An initial sweep is recommended before carrying out a detailed scan.
1. Turn the function switch to dual mode to sweep the area for cables or pipes
radiating transmitter and power signals.
2. Turn the sensitivity control to maximum.
3. If the signal bar graph does not move from maximum, reduce the sensitivity
control so that the bar graph is half way before starting.
4. Sweep the area to be excavated. Begin by walking the perimeter of the
proposed excavation area, moving across the width in parallel sweeps around
0.5 meters apart. Position the Loki transmitter as shown.
5. Sweep across the width of the excavation site, moving up the length. Position
the Loki transmitter as shown.
6. 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 it if required.
7. Resume sweeping over the excavation site.
Note that sometimes the signal may be re-radiated from other pipes or cables.
