®
DIGITAL CONTROL INCORPORATED
Locating
Locating Mode
To locate the transmitter the receiver’s trigger must be held in. This is referred to as the “locating mode”. When the trigger is held in, the top left window will stop dis- playing pitch with the flashing pitch/roll up- date squiggle (“~”) and will instead display signal strength and the
Signal | Transmitter |
Strength | Temperature |
+ | 458 22 |
Plus (+) | ~ 202 |
Indicator | |
| Predicted |
| Depth |
Locating Mode (Trigger Held In)
Locate Points (FNLP & RNLP) and Locate Line (PLL)
Two of the three locations used for guiding the operator to the tool are points that represent extensions of the transmitter. One point is in front of the transmitter (the front negative locate point or FNLP), and the other is behind the transmitter (the rear negative locate point or RNLP).
Bird's Eye View |
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| PLL | |
(Looking Down) | ||||
Drill |
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Axis Line |
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| FNLP |
RNLP |
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| Transmitter |
The third location is a line that re- presents the position of the trans- mitter. This line is perpendicular to the transmitter and is referred to as the positive locate line or PLL.
Geometry of FNLP, RNLP, and PLL from Top and Side Views Note how RNLP and FNLP are equal distances from the PLL.
Side View
PLL
Surface of
Ground
Drill
RNLP |
| FNLP |
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Transmitter
DigiTrak® Mark III Operator’s Manual | 43 |