Visual Land Impulse Provozní pokyny stáhnout pdf (Strana 16)

front to back, to find the spot where the bar graph

peaks and the signal tone is loudest and highest.

Because the scan area of pulse-induction metal

detectors is fairly wide, further pinpointing may be

required, especially on large or very shallow targets.

4. Readjust the TUNING control slightly counterclockwise,

throwing the instrument slightly out of tune below the

audio threshold point. When the IMPULSE is detuned,

the sensitivity of the coil is decreased.

5. With your IMPULSE slightly detuned, sweep the

search coil over the target again. You’ll notice that

the target area has shrunk.

6. Continue to detune your IMPULSE until only a

slight signal is heard when the coil is passed over

the target.

7. With the IMPULSE set to this minimum-tune mode,

only the center of the coil, or hot spot, will respond

to the target, pinpointing the target location.

8. Another way to pinpoint large and/or shallow

targets is to simply lift the search coil until only a

faint, narrow target response is heard.

9. After digging the target, retune your IMPULSE

before continuing.

Hot Spot

Search coil penetration

with minimized tuning

Search coil penetration

with readjusted tuning

Search coil penetration

with maximized tuning

Pinpointing with the

IMPULSE no-motion

detector is

accomplished by

adjusting the tuning

so that only the

center of the search

coil remains

sensetive to the

target.

PINPOINTING

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Visual Land Impulse Provozní pokyny Strana 16