Minelab GPX 6000 User Manual page 20

To Manage Ground Noise:
Perform a Ground Balance� To achieve the most thorough Ground Balance, follow the full‑length Ground Balance
`
Procedure (page 17)� To rapidly balance to the ground, follow the Quick‑Trak Ground Balance Procedure
In variable ground, use the Difficult Ground Type setting
`
Conductive Ground Noise
Conductive soils commonly occur when the soil contains salts� The effects of conductivity are most noticeable after rain when
salts are dissolved in water and become conductive� Ground may be conductive (salty) without any obvious environmental signs�
If a detector is sensitive enough to detect small gold, then it is also likely to detect low levels of conductivity�
To Identify Conductive Ground Noise:
To verify that noise is due to conductive ground, hold the coil 1 metre (3�3 feet) above the ground� Tilt the coil so that it is
parallel to the ground (horizontal) and then raise and lower the coil in the air between knee and shoulder height� If you hear
noise that correlates to the coil movement, then noise is likely due to conductivity in the ground�
To Manage Conductive Ground Noise:
` Use a Double‑D coil with the Double‑D mode set to Conductive Ground Cancel
CONTENTS
(page 15)�
(page
20
(page 16)�
21)�