Page 8 The Minelab Eureka Gold
Sweeping is carried out in a uniform motion along the ground to cover the
search area. Keep the coil parallel to the ground at all times and be aware
that there is a tendency for the coil to be raised at the end of each sweep
(see figure 18). Each sweep from one side of the body to the other should
take between 2 and 4 seconds to complete. This speed will depend on the
soil conditions and on the area in which you are operating. Variation in coil
height at the end of each swing can cause confusing sounds and will
reduce detection depth. Increased noise can also result from hitting rocks,
etc. Where possible, keeping the coil in contact with the ground will
increase detection depth and sensitivity to very small targets.
9.2 Pinpointing the Target
When a target has been detected, it is necessary to accurately determine
its position to enable the operator to recover it quickly and minimise any
damage to the environment.
You should switch back to the Fixed Ground Balance position to pinpoint
the actual location of the detected target. Sweep the coil over the general
area taking note of where the strongest signal is received as the coil is
moved over the target. By decreasing the length of the sweep it should be
possible to draw an imaginary line in the ground where the strongest
signal is located (see figure 19). The side of your boot can be used to mark
the ground along this line.
Figure 19 - Pinpointing the Target
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