User's Manual

DIGITAL CONTROL INCORPORATED
DigiTrak Falcon
™
F5

Operator’s Manual 81
Table C4: Conversion Factors for Calculating Exact Projected Depth or Actual Depth
Pitch →
±10%
(5.7°)
±20%
(11°)
±30%
(17°)
±40%
(22°)
±50%
(27°)
±60%
(31°)
±75%
(37°)
±90%
(42°)
From Actual to
Projected Depth
1.005
1.025
1.06
1.105
1.155
1.212
1.314
1.426
From Projected to
Actual Depth
0.995
0.975
0.943
0.905
0.866
0.825
0.761
0.701
Table C4 helps calculate the exact projected depth reading as well as the actual depth using
a multiplier (conversion factor) at different transmitter pitches.
For example, if you have a required (actual) depth of 24 ft. and want the receiver’s projected
depth reading at a 30% (17°) pitch, use the first row of conversion factors to select the
corresponding value for a pitch of 30%, which is 1.06. Multiply this value by the required
depth of 24. The result, 25 ft. 5 in., is what the receiver’s projected depth reading should be at
the locate line.
Using the projected depth displayed on the receiver, you can calculate the actual depth of the
transmitter using the second row of conversion factors. For example, if your pitch is 30% and
your projected depth reading is 24 ft., multiply depth 24 by conversion factor 0.943. The
result, 22 ft. 8 in., is the actual depth of the transmitter.