Accurate Locators XL16 IMAGER, User Manual

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In Figure 3.16, the view here shows a strong rise with a fast fall. In relation to the overall
image, the analysis will show a possible anomaly at this position.
As previously mentioned, the main characteristics that we are looking for in the scans are
the difference in the signal values. When first scanning an area a rough scan will normally
be conducted. The 2D Measurement Mode works very well on both the larger scans and
the smaller scans. When analyzing a larger scan, the differences, for the most part, are not
as much as when doing a smaller scan. The 2D mode will highlight stronger points and
show more of the background in relationship to those points.
Of a larger scan, the difference shown here does not clearly stand out by itself when
looking at the whole picture. By using this mode, a tunnel or void stands out clearly. The
background of the image, Figure 3.17, is the upper portion shown in the red and orange
on this particular scan. The larger your background area is on a rough scan the better.
Once an anomaly is detected, it is important to mark that area and perform additional
scans to narrow down and pinpoint the location of the target. When making smaller scans
around a target, ensure that you are leaving enough room to see the background. A
common mistake that tech support sees quite regularly are scans that start in or just
before the target. An old saying says, “You cannot see the forest through the trees.” The
same applies with analyzing data.
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