Fisher Labs 1280-X Manual do Utilizador descarregar pdf (Página 10)

By adjusting the DISCRIMINATION control you will be able to

ignore (or “reject”) small pieces of metallic trash and ground

minerals while detecting valuable targets. The lowest setting at

which an object is rejected is referred to as the object’s

“discrimination point”. Discrimination points are determined by

such factors as size, shape, depth, type of metal and ground

mineralization.

1. Scatter some sample targets such as coins, pull

tabs and small pieces of foil on the ground 1 to 2

feet apart.

2. Turn the SENSITIVITY control to 9.*

3. Turn the DISCRIMINATION control to zero.

4. Put the headset on and turn the POWER ON-OFF/

VOLUME control to about 6.

5. Hold the search coil about 2 inches above and

parallel to the ground. Move it slowly over the

samples and note the sharp loud response as you

pass over each one. Keep in mind that the 1280-X

is a motion detector and responds only when the

search coil (or the target) is moving.

6. Increase the DISCRIMINATION control to a

setting of 3 and again pass over the targets.

Repeat this process at settings of 4,5,6 and so on to

10. You will note that as you increase the level of

discrimination, the 1280-X will reject some targets

and continue to respond to others. You have now

determined the discrimination points for the

rejected objects. For example, the small nail

discrimination point may be at 4 and the pull tab

discrimination point at 6.

7. Some objects such as shallow bottle caps, bent

pull tabs or trash less than 2 inches from the coil

may be difficult to reject. The 1280-X will instead

respond with a strong broken signal which will

usually disappear if the search coil is raised slightly.

(The strong signal of a good target will just get

weaker when the coil is raised.)

8. The 1280-X will remain silent when some objects

DISCRIMINATION POINTS

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Fisher Labs 1280-X Manual do Utilizador Página 10