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Page 4 The Minelab SD2100v2
b) Adjust the Balance 1 control so that no variation in volume or pitch is
heard as the coil is moved up and down. The greater the change in the
volume or pitch of the threshold tone as the coil is moved above the
ground, the further out of adjustment the balance controls are.
c) When the detector is balanced with the Search switch in the Balance 1
position, switch to Balance 2 and, using the Balance 2 control knob,
repeat the process as described above.
d) When the detector has been balanced in both positions, switch to
Search and again raise and lower the coil a couple of times. There
should be minimal to no deviation in the threshold as the coil is moved.
The detector is now said to be ‘balanced’ or ‘ground balanced’.
e) In almost all circumstances the Search switch should be set to the
central Search position when detecting. There are very few
circumstances in which there is any value in changing this setting.
The function of the Search switch is to select which of the ‘channels’ the
detector uses to generate signals. Each ‘channel’ is sensitive to its own
range of target types and sizes and complements the other ‘channel’. When
set to Search, the detector uses the best ‘channel’ for a particular target to
generate the signal.
In extreme circumstances, operating with the Search switch in the
Balance 1 position can help to reduce ground noise from very noisy ground.
It can sometimes stabilise the Threshold which will assist in hearing faint
targets in such conditions. However, when operating in Balance 1, there
will be some gold nuggets which may not give a signal.
If ‘ground noise’ becomes excessive while searching, simply ground
balance the detector again using the technique described above. In ground
with low mineralisation, ‘ground noise’ will also be minimal and the Balance
controls will need little adjustment.