16
IN THE FIELD TECHNIQUES
- No-motion mode
In the No-Motion All-Metal 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 GroundTrac button. This action will “Ground Balance” the detector.
RETUNING
Keep the coil still, just above the ground surface, and press the GroundTrac 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 No-Motion’s 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 object 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.
