Minelab F1A4 Manuel de service télécharger pdf (Page 23)

Operations Manual

Page 23

5.2.3 Ground Balance Procedure (see Figure 10)

Ensure that the Noise Cancel and Audio Reset procedures have been

performed and then select an area known to be free of metallic

particles.

a. Place the detector with the coil resting on the ground.

b. Turn the On/Off switch to Balance and hold the switch in this

position.

c. Move the coil slowly up and down from 25 to 100 mm above the

ground. Each complete up and down movement should take 3 to

4 seconds. As this movement is repeated, any ground noise will

gradually diminish until it is eliminated, i.e. the detector makes no

sound when leaving or approaching the ground surface.

d. Before resuming search operations the detector switch should be

released to Search. This fixes the ground balance to its current

setting and prevents it from being shifted by metallic targets in the

ground.

While balancing, a persistent signal indicates the presence of a metallic

target in the ground.

It is possible that the signal you are attempting to balance out is that of

a small or distant target.

Figure 10 - Adjusting Ground Balance

WARNING

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Minelab F1A4 Manuel de service Page 23