14
Schonstedt recommends locating the
ghost signals as finding them confirms
the position of the main peak. To
lose the ghost signals, reduce the
sensitivity of the Loki receiver; this
should leave only the main peak
signal detectable.
4. With the Loki receiver sensitivity set as desired, propel the sonde along 1m (3-4
feet) and stop. Place the Loki receiver over the estimated position of the sonde.
5. Move the Loki receiver backwards and forwards with the blade’s orientation
parallel to the sonde.
6. Stop when the bar graph indicates a clear peak.
7. Rotate the Loki receiver as if the blade were a pivot,
stop when the display indicates a clear peak response.
8. Move the Loki receiver from side to side until the bar
graph indicates a clear peak.
9. When the Loki receiver locates a peak signal, it
will automatically calculate the depth of the sonde.
Observe the depth reading while moving the Loki
receiver from side to side; the lowest reading will be
the correct location.
10. Repeat each step in smaller increments with the
Loki receiver blade resting on or near the ground.
The Loki receiver should now be directly above the
sonde with the blade parallel with the sonde; mark
this position.
11. Propel the sonde a further 1m (3-4 feet) along the
pipe and pinpoint and mark. Repeat the procedure
along the route at similar intervals. Note, while tracking the sonde altering the
Loki receiver’s sensitivity is not required unless the depth of the pipe, or the
distance between the Loki receiver and sonde changes.
