Minelab MF5 Operation Manual page 20

Tone
Changing Volume
Low Battery Alert
Battery Critically Low
Overload
Equipment Fault
Coil Fault
Advisory Error
20 | Functional Description
Event
Increasing or reducing volume.
Indicates battery charge is low and
detection time is limited.
Indicates that batteries do not
have enough charge to
continue detection.
Indicates that the receiver
electronics are overloaded.
Indicates failure of
detector component.
Indicates coil not connected or
not receiving sufficient current.
Indicates the operating conditions
are not ideal but will not affect
detector performance.
Description
Mid-pitch single beep with volume
dependent on setting, except when
changed to default value.
Two high-pitched tones every
45 seconds.
High-pitched fast continuous
oscillating tone PLUS blinking
Battery Low LED provided the LED
display is switched on.
Continuous low-pitched tone.
Low-pitched slow oscillating tone
(ee-aww, ee-aww).
Low-pitched double tone every
five seconds.
Low-pitched tone repeated every
30 seconds (ee-aww).