User's Manual

DIGITAL CONTROL INCORPORATED
DigiTrak F5 Operator’s Manual 39
Using the tables provided below, you can look up the actual depth (Table B1) and the fore/aft
offset (Table B2) based on the receiver’s depth reading (projected depth) and the transmitter
pitch. You can also look up the projected depth (Table B3) if you know the required depth
(actual depth) of your installation and you want to find the corresponding projected depth
reading that you will see on the receiver during drilling. The final table (Table B4) provides
conversion factors for determining the projected depth from the actual depth or the actual
depth from the projected depth at various transmitter pitches.
Table B1 lists the projected or displayed depth values (shown in red) in 5 ft (1.52 m)
increments in the first column and provides values for the actual depth (shown in green) at
different transmitter pitches. For example, if you have a displayed depth of 25 ft (7.62 m) and
your transmitter is at a 40% (22°) pitch, then you can see from Table B1 that the actual depth
of the transmitter is 22 ft 8 in. (6.91 m).
Table B1. Determining Actual Depth from Displayed (Projected) Depth and Pitch
Pitch→
Displayed
Depth ↓
±10%
(5.7°)
±20%
(11°)
±30%
(17°)
±40%
(22°)
±50%
(27°)
±60%
(31°)
±75%
(37°)
±90%
(42°)
±100%
(45°)
5'
(1.52 m)
5'
(1.52 m)
4' 11"
(1.50 m)
4' 9"
(1.45 m)
4' 6"
(1.37 m)
4' 4"
(1.32 m)
4' 2"
(1.27 m)
3' 10"
(1.17 m)
3' 6"
(1.07 m)
2' 6"
(0.76 m)
10'
(3.05 m)
9' 11"
(3.02 m)
9' 9"
(2.97 m)
9' 5"
(2.87 m)
9' 1"
(2.77 m)
8' 8"
(2.64 m)
8' 3"
(2.51 m)
7' 7"
(2.31 m)
7'
(2.13 m)
5'
(1.52 m)
15'
(4.57 m)
14' 11"
(4.55 m)
14' 8"
(4.47 m)
14' 2"
(4.32 m)
13' 7"
(4.14 m)
13'
(3.96 m)
12' 5"
(3.78 m)
11' 5"
(3.48 m)
10' 6"
(3.20 m)
7' 6"
(2.29 m)
20'
(6.10 m)
19' 11"
(6.07 m)
19' 6"
(5.94 m)
18' 10"
(5.74 m)
18' 1"
(5.51 m)
17' 4"
(5.28 m)
16' 6"
(5.03 m)
15' 3"
(4.65 m)
14'
(4.27 m)
10'
(3.05 m)
25'
(7.62 m)
24' 11"
(7.59 m)
24' 5"
(7.44 m)
23' 7"
(7.19 m)
22' 8"
(6.91 m)
21' 8"
(6.60 m)
20' 8"
(6.30 m)
19'
(5.79 m)
17' 6"
(5.33 m)
12' 6"
(3.81 m)
30'
(9.14 m)
29' 10"
(9.09 m)
29' 3"
(8.92 m)
28' 3"
(8.61 m)
27' 2"
(8.28 m)
26'
(7.92 m)
24' 9"
(7.54 m)
22' 10"
(6.96 m)
21'
(6.40 m)
15'
(4.57 m)
35'
(10.67 m)
34' 10"
(10.62 m)
34' 2"
(10.41 m)
33' 1"
(10.08 m)
31' 8"
(9.65 m)
30' 4"
(9.25 m)
28' 11"
(8.81 m)
26' 8"
(8.13 m)
24' 6"
(7.47 m)
17' 6"
(5.33 m)
40'
(12.19 m)
39' 10"
(12.14 m)
39'
(11.89 m)
37' 9"
(11.51 m)
36' 2"
(11.02 m)
34' 8"
(10.57 m)
33'
(10.06 m)
30' 5"
(9.27 m)
28'
(8.53 m)
20'
(6.10 m)
45'
(13.72 m)
44' 9"
(13.64 m)
43' 11"
(13.39 m)
42' 5"
(12.93 m)
40' 9"
(12.42 m)
39'
(11.89 m)
37' 2"
(11.33 m)
34' 3"
(10.44 m)
31' 7"
(9.63 m)
22' 6"
(6.86 m)
50'
(15.24 m)
49' 9"
(15.16 m)
48' 9"
(14.86 m)
47' 2"
(14.38 m)
45' 3"
(13.79 m)
43' 4"
(13.21 m)
41' 3"
(12.57 m)
38' 1"
(11.61 m)
35' 1"
(10.69 m)
25'
(7.62 m)