Greenlee Marker-Mate EML100 Manuel D'instructions page 13

EML100 Marker Search Pattern
A search pattern should be used when locating markers. All marker locators are dependent
on the type of marker, depth of marker, and external noise as to how broad a footprint
can be detected. The highest probability of locating a marker of unknown type and depth
requires a tight search pattern.
Swing the locator in a comfortable 0.6 to 0.8 m (2 to 2-1/2 ft) arc, keeping the antenna
portion level to the ground. The speed of the swing and walk should be moderate to allow
full detection potential. For best results, perform some sort of zigzag pattern as shown
below. The edges of the swing should come to the same point in allowing 100% coverage
of the area (Figure 16).
Start
End
A wider search pattern can be used, but the larger the spacing between passes the greater
the chance of not locating a marker.
A benefit of using the EML100 in SCAN mode is that the search path can be done once
tightly to insure that all markers are found and identified. Compared to a marker locator
only able to detect one marker type at a time, the search pattern would have to be repeated
for each marker type.
Locator swing motion
Figure 16. Search Pattern
EML100
0.8 m
(2.5 ft)
0.8 m
(2.5 ft)
0.8 m
(2.5 ft)
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