Minelab SD2200V2 Instruction Manual page 17

Instruction Manual Page 5
5.2.8 Ground Balancing
Automatic ground balance is active whenever the detector is set in the
Tracking mode. In this mode, the detector continuously measures the effect
of ground mineralisation and automatically adjusts the ground balance to
compensate.
Introduction
The SD2200v2 can be operated with automatic ground balance (Tracking
mode) or with the ground balance fixed (Fixed mode).
When the Balance Mode switch is switched to Fixed mode, the ground
balance is held at its current level.
When switched from Fixed to Tracking mode, the detector begins to
automatically ground balance through a process of two stages. The first
stage is a very rapid adjustment to the ground mineralisation. This stage
lasts for five seconds after the switch is thrown. The second stage
continues to adjust to the ground mineralisation, but at a greatly reduced
speed. Adjustment continues for as long as the detector is kept in Tracking
mode.
It may be of use to repeat the ground balance function when ground
conditions change rapidly.
If the detector is switched to Fixed mode at any time, it will no longer adjust
itself to changes in soil mineralisation, but will stay fixed at the level it last
reached while in Tracking mode.
While in Tracking mode, the detector usually stops ground balancing when
it detects a target. However, a weak target signal may not be recognised
as a target and, if the coil is repeatedly passed over it, the target could be
tracked out. It is therefore recommended to switch from Tracking to Fixed
when pinpointing a potential target (see also Discrimination level control,
pages 21and 22).
For best results, use Tracking mode in areas with high ground noise. If the
ground mineralisation is only mild or with little variability, searching in Fixed
and regularly rebalancing when required can have advantages. People
who have used previous SD models must note that setting the Channel
switch does not affect the operation of the automatic ground balance.