Bounty Hunter DISCOVERY 3300 - Manual (Page 22)

22
IN THE FIELD TECHNIQUES
- Pinpoint Mode
In the Pinpoint Mode, coil sweep technique is not important. Rather, user
retuning is critical.
The detector does not automatically adjust to changing ground and
environmental conditions; the operator is required to make the adjustment. If
the detector sounds a constant tone over all areas of the ground, retune the
detector by pressing the PINPOINT button.
RETUNING
Keep the coil still, just above the ground surface, and press the PINPOINT button.
Make sure that the spot on the ground you chose for tuning did not contain
metal; pass over the area with the coil again to insure that the detector does
not emit a tone.
TEMPERATURE CHANGE
If the detector moves from one temperature environment to another, or if the
temperature changes, you must retune the detector until the temperature
stabilizes. If you move from a cooler to a warmer environment, the detector may
emit a constant tone; if so, retune. If you move from a warmer to cooler
environment, the detector may lose sensitivity; if so, retune.
PINPOINTING
Detection Field
The detection field depends on the size of the
target.
Large Objects
After detecting a target, lift the coil off the ground to a
distance where you hear the faintest tone. Move the coil over the ground at
this height. If the tone does not fade, you have detected a large or irregularly
shaped object. Outline the object with slow coil movements.
If you can outline an area larger than the size of the inside coil, you then have
a large target, or several targets.
Large objects can be detected when they enter the range of the outside coil.
Small Objects
After detecting a target, hold the search coil above the
ground, at a distance where you hear the faintest
tone. While maintaining the coil at this height above
the ground, move the coil from side-to-side. Note
the spot where the tone is loudest. Then move
the coil toward the ground to zero-in on the
target’s location.
A coin-size object will be detected when the
object enters the range of the inner coil.