Digitrex 3-3000-00a-F manual Troubleshooting

Troubleshooting ®

Problem/Concern	Causes/Solutions	Section to Consult
Minus sign (“–”) in bottom	Receiver is set on ground for depth	“Ultrasonic Function” in
window.	reading, particularly at shallow depths, and	Receiver Section
	the ultrasonics are not reset. Reset the	“Calibrating the Receiver”
	ultrasonics.
		in Receiver Section
	Receiver has gone out of calibration.
	Recalibrate using either 1-point or 2-point
	calibration.
Roll positions sticking or not	Interference (squiggle in top left window	“Electrical Interference/
accurate.	will not blink regularly).	Background Noise Check”
	If squiggle is blinking regularly, there may	in Signal Interference
		Section
	be a transmitter or receiver malfunction. If
	possible substitute a different receiver.	“Self-Test for Mark III
	If you have a Mark III Receiver, conduct a	Receivers” in Operational
		Tests Section
	self-test for error code and failure
		“Temperature Overheat” in
	determination.
	Transmitter has been overheated (temp	Transmitter Section
	dot is black).
Not getting a solid depth	Interference.	“Electrical Interference/
reading.	The approximate depth may be calculated	Background Noise Check”
		in Signal Interference
	using the pitch information along with the
		Section
	distance between the FNLP and RNLP.
		“Running Off Pitch or
		Calculating Depth from
		Pitch” in Locating Section
		“Calculating Depth Based
		on Distance Between
		FNLP & RNLP” in
		Locating Section
Bottom window depth/	Transmitter is being exposed to tempera-	Transmitter Section
distance flashes (with trigger	tures in excess of 60ºC (140ºF). Verify
released).	that temp dot is not black before further
	use of transmitter.
Flashing squiggle (“~”) in	Transmitter has been exposed to tempera-	Transmitter Section
bottom window.	tures in excess of 60ºC (140ºF). Verify
	that temp dot is not black before further
	use of transmitter.
Solid squiggle (“~”) in bottom	With 5.0 and later series firmware, the	“5.0 Series Firmware
window.	receiver will display the transmitter’s	Functions” in Receiver
	predicted depth at the FNLP in the bottom	Section
	window, along with a solidly illuminated	Locating Section
	squiggle, when the trigger is held in. Pre-
	5.0 series firmware will not do this.

66 DigiTrak® Mark III Operator’s Manual