Page 10 | The Minelab SD2100v2 |
7.5Pinpointing
In order to save time in the recovery of an object and to reduce the size of the hole required to extract it from the ground, it is necessary to pinpoint the exact location of the object. The technique described here will be particularly useful with the Double ‘D’ coil, but will also work with a Monoloop coil.
When a likely object is detected, sweep the general area with the coil, taking note of where the strongest signal is received. Raise and lower the coil to one side of the target to make sure you are still ground balanced. If necessary balance the detector again, then recheck the signal. If the ground balance is accurate you may begin the pinpointing procedure. Decrease the length of the sweep and it should be possible to draw an imaginary line in the ground where the strongest signal is located (see Figure 7). Now, move around the target and sweep the coil at 90 degrees to the initial direction. Repeat the process of drawing an imaginary line. Where the two imaginary lines cross is where the object is located.
Figure 7 - Pinpointing Procedure
If using a Monoloop coil, small shallow |
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nuggets will give a signal near the rim |
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of the coil. An alternative pinpointing |
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technique for Monoloop coils is to turn |
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the detector coil on its side and move |
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the coil while it is vertical across where |
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you suspect the target to be. This may |
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assist in pinpointing as shown in | Figure 8 - Alternative Pinpointing | |
Figure 8. | ||
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