User's Manual

Locating
DigiTrak
®
SE™ Operator’s Manual 59
LL
Obstruction
Borepath
Drill
P2 P3P1
Path Around
Obstruction
Predetermined
Distances
Preparing for Off-Track Locating
3. While still holding the trigger in and keeping the receiver in the same orientation, step to the side of
the tool another predetermined distance (P2) further away from it. Move the receiver forward and aft
until you can see the ball jump from the bottom of the screen to the top of the screen (or vice versa),
then mark this location.
4. While still holding the trigger in and keeping the receiver in the same orientation, step to the side of
the tool another predetermined distance (P3) further away from it. Move the receiver forward and aft
until you can see the ball jump from the bottom of the screen to the top of the screen (or vice versa),
then mark this location.
5. After finding the three locations P1, P2, and P3 to the side of the transmitter, connect these locations
with a line. This is the locate line. Because the LL runs perpendicular (at a 90° angle) to the
transmitter, it is possible to determine the heading of the tool. By comparing the slant distance or
signal strength at the predetermined distances of P1, P2, and P3, as the tool progresses you can
verify if the drill head is moving away from or closer to the intended bore path.