16 F1A4 Operator Instructor Notes and Syllabus
Minelab Countermine Division
Safety through Excellence
Forty two
Detector Tones
•
Threshold Tone
. A low volume continuous tone indicating correct operation of
the detector.
•
Target Tone
. Abrupt variation to the volume and pitch.
Forty three
Operating Multiple Detectors
Key points:
•
When two or more F1A4 detectors are operating in close proximity it is
necessary to automatically tune each unit via the
Noise Cancel
procedure to set
the operating frequencies so that signals do not interfere with each other.
•
To set up multiple detectors it is necessary to adhere to the following procedure:
o
Turn ‘Detector 1’
On
, and switch to
Search
.
Wait for the end of the Start-
up tone.
o
With ‘Detector 1’ operational, position ‘Detector 2’ two metres away and turn
it
On
. Wait for the end of the start-up tones and then perform a
Noise
Cancel
procedure. Wait 70 seconds for the
Noise Cancel
to end with the
four ‘beeps’.
o
With ‘Detector 1’ and ‘Detector 2’ both operational, position ‘Detector 3’ two
metres away and turn it
On
. Wait for the end of the start-up tones and then
perform the
Noise Cancel
procedure. Wait 70 seconds for the
Noise
Cancel
to end with the four ‘beeps’.
o
Continue the above procedure if more that three detectors are to be used in
close proximity.
•
The recommended minimum operating distance between units is three metres,
but if interference does result it will be necessary to limit the number of detectors
in use or increase the distance between units. SOP Safety distances rather than
interference distance normally dictate the distance between operational
detectors.
Forty four
QUESTIONS
Outdoor Area.
At the completion of the classroom lessons move to the outdoor
training area previously prepared. Provide practical demonstrations of all of the
procedures contained in the lesson. Also demonstrate edge detection. Note: by
selecting different targets, demonstrate how a different tone is produced for each target.
Often, different coins (containing different metals) are the best way to demonstrate this.
Students shall be able to explain all operating procedures.
Students shall be able to locate and identify the approximate size and depth of buried
targets. Students shall use correct sweeping methods to pinpoint the targets.
