SubSurface Instruments AML PRO Operator's Manual page 22

USING THE AML PRO
Operation of the AML Pro is technique
sensitive. We advise that you practice
on a known buried object like a culvert
pipe or other partially exposed objects.
Once the principals of operation are
understood, acquiring a technique is
relatively simple with a little practice.
Factory training is available and highly
recommended.
The depth of the AML Pro
transmission signal varies with
material substrates. This unit can
be used in various substrates such
as water, snow, red-clay, and does
not have the substrate restrictions of
ground penetrating (GPR) radar.
The AML Pro has thirty two sensitivity
settings, with setting 32 being the
strongest (see figure 22-1). However,
the density of the material will
influence the depth of the transmitted
signal. The transmission signal will
penetrate deeper through highly
reflective materials such as concrete,
clay, asphalt, or highly compacted
soil (see figure 22-2); and, less deep
in sand, granular soil, or recently
backfilled soil which tends to absorb
some of the return signal strength
(see figure 22-3).
IMPORTANT: The AML Pro is water-
resistant, not water-proof. Cover
the unit with a clear plastic bag if
operating in wet weather conditions.
22
FIGURE 22-1
Note: Level 32 provides the highest
sensitivity setting, 1 the lowest sensi-
tivity setting.
Figure 22-2
Note: Signals travel further in more
dense and highly reflective materials.
Figure 22-3