Minelab F3 Operation Manual page 21

Tones
Start-Up
Threshold
Ground Balance
Target
Low Battery
Equipment Fault
Coil Fault
Noise Cancel
Event
Internal checks when
the F3 is switched on
Signifies correct
operation of detector
Indicates successful
Ground Balance
procedure completed
Indicates metal target
detected
Indicates batteries do
not have enough
charge to continue
detection
Indicates failure of
detector component or
a dislodged Red
Sensitivity Endcap
Indicates coil not
connected or not
receiving sufficient
current
Indicates Noise Cancel
procedure is occurring
19
F3 Operations Manual
Description
Four rising tones over
12 seconds
Steady low volume
continuous tone
One fast high pitched
double beep
Increases volume
(compared to
Threshold Tone) and
high or low pitch
depending on target
metal composition and
depth
High pitched fast
continuous oscillating
tone
Low pitched slow
oscillating tone (ee-
aww, ee-aww)
Low pitched double
tone every five
seconds
Two single beeps
followed by 45 seconds
of short double beeps
finishing with four
single beeps