Digitrex 3-3000-00a-F manual Locating Mode, Locate Points Fnlp & Rnlp and Locate Line PLL

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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 “+/–” indicator. The plus (“+”) and minus (“–”) signs in the top left window are the key to locating and will guide the operator to the tool (transmitter) using three locations, not just the peak signal.

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		PLL
(Looking Down)
Drill
Axis Line			FNLP
	RNLP
		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

Transmitter

DigiTrak® Mark III Operator’s Manual 43