decrease the sensitivity appropriately.
4. Move the search coil
When detecting, you should move the search coil at a constant speed,
not unsteadily. Let the search coil be parallel with and about 1/2 inch
from the surface, not to swing it like a pendulum high and low above
the ground. (See Fig.13)
Most of valuable metal objects will send repeatable signals. If the signal
isn’t repeatable, it’s mostly a false signal. When there is a clear sound
instructing the buried targets, you could read out the approximate
target type and depth on the LCD screen. And you could also move the
search coil above the target objects fast, in order to get a more stable
signal.
5. Make use of the sound, to help discriminate
In the process of detection, the user doesn’t always watch the screen.
And the sound identification system will sound three frequency tones
to help discriminate the targets.
Low pitch——ferrous metals such as iron nail, caps and so on.
Mediant——pull tabs, 10P nickel coin.
High pitch——copper, aluminum and silver such as1￡,2￡,2P and so
on copper and silver coin.
To Next Page
Loading...
