Minelab F3 Operation Manual page 29

•
Red Sensitivity Endcap:
Hold the Test Piece above the middle of the coil with the
rounded end (containing the metallic target) TOWARDS the coil.
Move the Test Piece towards the centre of the coil until it lightly
touches the coil then move it sideways off the coil (the Test
Piece should be moved slowly and smoothly during this
procedure). A clear response (change in Threshold Tone volume
and pitch) should be heard indicating the sensitivity of the
detector is correct.
The Test Piece not only ensures the sensitivity of the detector is
correct but also gives the operator an example of how a minimum
metal mine might sound when deeply buried: for example Type 72A
at 15cm . (Black Endcap only).
F3 Operations Manual
NOTE
27