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3.2 Functional Tones
The F3Ci emits tones that vary in pitch and volume to alert the
operator to targets, automatic detector functions or equipment alarm
conditions. The following table summarises the tones that an F3Ci
can produce.
Tones Event Description
Start-Up Internal diagnostic checks
when the F3Ci is switched on
A single rising tone
followed by two beeps.
Heart Beat Signifies correct operation of
detector
Single or double beep
every four seconds (only
occurs in the absence of
detection audio).
Ground
Balance
Indicates successful
Ground Balance procedure
completed
Single beep followed by
three beeps at completion.
Target Indicates metal target
detected
Increases volume and high
or low pitch depending on
target metal composition
and depth.
Battery Low Indicates batteries do not
have enough charge to
continue detection
High pitched fast
continuous oscillating tone
PLUS blinking Battery Low
LED provided the LED
display is switched on.
Equipment
Fault
Indicates failure of detector
component
Low pitched slow
oscillating tone (ee-aww,
ee-aww).
Coil Fault Indicates coil not connected
or not receiving sufficient
current
Low pitched double tone
every five seconds.
Noise Cancel Indicates Noise Cancel
procedure is occurring
A single beep followed by
20 seconds of a two-beep
series and completed with
three beeps.
Default
Sensitivity
Selected
Confirms to operator that
Sensitivity knob is at Position
4 (Default) when the detector
is switched on or Position 4
is selected when the detector
is in use
Double mid pitched beep.
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