Minelab F3 Manuel de service télécharger pdf (Page 30)

Start-Up Tones a low volume Threshold Tone will remain

audible.

Figure 18: Switch On

• If the Threshold Tone is steady continue with STEP 2. If the

Threshold Tone is noisy or uneven when the coil is stationary,

perform a Noise Cancel (Section 5.3.a).

• If the Threshold Tone is steady but seems louder than normal

when the coil is away from the ground and metallic targets,

perform an Audio Reset (Section 5.3.b).

b. STEP 2 Ground Balance

• Ensure this procedure is carried out on ground free of metal and

hold the coil about 150mm (6 ins) above the ground.

• Press down and hold the green Ground Balance button

and slowly lower the coil directly to the ground then lift the coil

up again 150mm (6ins). Refer to Figure 19.

• Continue to slowly lower and raise the coil until the ‘Ground

Balance OK’ tone is heard. (‘Ground Balance OK’ tone consists

of a short high-pitched double beep).

• Release the Ground Balance button.

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Minelab F3 Manuel de service Page 30