Minelab Eureka Gold Instruction Manual page 25

Page 5
f) The Volume control is generally turned to maximum. The setting does
not affect the threshold level, but sets a limit on the loudest audio
signal produced. Test the volume comfort level by passing a piece of
metal over the coil. Adjust the Volume control to a comfortable level.
g) Adjust the Tone control to a pitch to which your ears are most
sensitive. This again allows you to have the threshold set to as low a
level as possible.
h) It is recommended that the Balance switch is set to either Fast Track or
Slow Track for general detecting. The Fixed setting can be used to hold
the ground balance in localised areas when it is suspected that small
targets are being balanced out (see Balance Switch on page 17).
Leaving the setting at Fast Track or Slow Track while detecting will ensure
that the Eureka Gold continuously adjusts itself to the
changing ground conditions. Note that sudden changes in the ground
conditions may still produce changes in the audio signal and
balancing may need to be repeated.
i) Move the coil up and down near the ground surface. This allows the
Automatic Ground Balance feature to set the
balance. Keep 'pumping' the coil until there is
no change in the audio signal accompanying
the movement (see Figure 17).
j) Start searching by slowly moving the coil
across the ground. Periodically check the
control settings to correct for any change in
the detector or soil conditions. Refer to
'Detecting Techniques' (see pages 26-30)
for details on finding targets.
The Minelab Eureka Gold
Figure 17 - Ground
Balancing