9
Place the locator over the estimated
position of the sonde:
1. Refer to Figure 1.
Move the locator backwards and
forwards with the blade in-line with the
sonde. Stop when the locator display
indicates a clear peak response.
2. Refer to Figure 2.
Rotate the locator as if the blade were a
pivot, stop when the display indicates a
clear peak response.
3. Refer to Figure 3.
Move the locator from side to side
until the display indicates a clear peak
response.
4. Repeat Steps 1 to 3 in smaller
increments with the locator blade
resting on or near the ground. The
locator should now be directly above
the sonde with the blade in line with the
sonde. Now mark the position.
5. Propel the sonde a further three to
four paces along the drain or duct
and pinpoint and mark. Repeat this
procedure along the route at similar
intervals. It should only be necessary
to change the locator sensitivity while
tracing the sonde if there is a change
in the depth of the drain or duct, or the
distance between locator and sonde.
Figure 2:
Figure 1:
Figure 3:
