Ground Balance - Whites TM 808 Instruction Manual

Description of Controls continued.....

GROUND BALANCE

ELIMINADOR DE TIERRA
For the best results, the GROUND BALANCE control needs to be ad-
justed each time the detector is used. The NORMAL setting works well for most
conditions. GROUND BALANCE is adjusted to cancel out or ignore common
mineralization in the ground thus, allowing the deepest available penetration.
A setting clockwise toward (+) is used for higher mineralization and a setting
counterclockwise toward the (-) would be sufficient for low mineralized soils.
The method for adjusting this control will be covered in the section on TUNING.
In a nut shell, when GROUND BALANCE is set properly little or no change in
THRESHOLD hum is noted as the detector is lifted slightly up or down in rela-
tionship to the ground. It should also be noted that the AUTOMATIC THRESH-
OLD control, which will be discussed in the next section, should be set in the
NO-AUTO position while the GROUND BALANCE control is being adjusted. The
GROUND BALANCE control and the SIGNAL BALANCE control work hand in
hand to tune out undesired responses, and provide the deepest possible pen-
etration (detection depth).
(9)