19
OPERATION AND USE TIPS
S
HAPE OF THE
D
ETECTION
B
EAM AND
L
INE OF
S
IGHT
Due to the
GAS•TRAC
LZ-30
using a point of light for targeting, it can be easy
to forget that the actual detection path is in the shape of a cone, which starts
from a point (the instrument) and gets wider on the path to the target. At a
distance of 30m (100ft.), this width is 20cm (8in.).The operator will get the most
consistent results if he/she keeps as much of this path in/over the target as
possible.
Because of this, some situations can present a challenge, such as if part of
the beam is reflecting off of a different surface than another. This is known as
“beam skipping”. The operator will get the most consistent results if he/she
keeps as much of this beam in/over the target as possible.
In the picture to the right (beam not
to scale), part of the beam is partially
blocked by the fence, potentially
causing reduced sensitivity, or in
some cases, false positives. The
operator should simply move slightly
to the left, ensuring that the full width
of the beam will make it to the target.
If the operator were surveying the
ground behind the fence, this
wouldn’t be too great of a mismatch,
but if the target was the face of the
building in the background, there
would be a very large difference in
return signal between the portion of
the beam that is hitting the building
and the portion that is hitting the
fence.
Summary of Contents for GAS-TRAC LZ-30
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