After you have detected the presence of a target, hold the locator vertically and move it back and forth in an “X” pattern. The peak signal occurs directly over a vertical target, and over the ends of a horizontal target. Reduce the gain setting as required to facilitate pinpointing a target.
The “X” pattern is ideal for pinpointing small objects. A standard 1-1/4 inch PK nail buried up to 12 inches can be located so precisely with this technique that it can be uncovered using a 1/2-inch star drill.
If you find more then one signal in the vicinity of a target, just raise the locator several inches higher (this has the same effect as reducing the gain). Any signal that disappears when the locator is raised is probably not coming from the actual target. The signal from a rusty bolt or other small item will decrease much faster with distance than the signal from a larger target such as a corner marker. An 18-inch length of 3/4-inch pipe can be located at depths up to 9 feet.
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Figure 3-1. Signals from Vertical and Horizontal Targets
Figure 3-2. “X” Pattern Provides Precision Locating
Figure 3-3. Raising the Locator Eliminates Unwanted Signals
