User's Manual

Locating

DigiTrak

F5™ Operator’s Manual 67

Effects of Depth, Pitch, and Topography on

Distance Between FLP and RLP

In general, the deeper the transmitter is, the further apart the FLP and RLP will be. The distance between

the FLP and RLP with respect to the location of the LL is also a function of the transmitter pitch and the

topography. (For more information, see Appendix B.)

When the transmitter pitch is negative, the FLP will be further from the LL than the RLP (see figure

below). When the transmitter pitch is positive, the RLP will be further from the LL than the FLP. If the

ground surface or topography slopes significantly, the locations of the FLP and RLP will also be affected

with respect to the LL even if the transmitter itself is level.

FLP

RLP

70°

Effect of Pitch on Distance Between FLP, RLP, and LL

Note how the RLP and FLP are at different distances from the LL when the transmitter is

at a negative pitch (compare with figure on previous page in which the transmitter is level).

It is possible to calculate depth (for comparison to the receiver’s depth reading) using the distance

between the locate points and the pitch of the transmitter. For additional information, see Appendix C:

Calculating Depth Based on Distance Between FLP and RLP.

Drill

Surface o

Ground

Transmitte

(Negative

or Downward Pitch)