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C
M
ARE AND
AINTENANCE
•
A highly stable base for the instrument. A tripod
is recommended.
The target that you choose is critical to the success
of the alignment operation. It should be a reflecting
target large enough to be seen clearly from a
distance but small enough to be a highly accurate
indicator of where the laser beam is hitting. A
bicycle reflector at least three inches in diameter is
recommended.
The target should be positioned at least 90 meters
(300 feet) from the instrument and isolated from
other targets. Ideally, the target, when viewed from
the instrument's position, should be silhouetted
against the sky, with no other targets in the
immediate vicinity. (That's so you can be certain of
the general area the laser is hitting.)
Page 75
Finally, make certain you know the scope's
definition of which way is up. To adjust the scope
UP (marked L) turn the screw clockwise. To adjust
the scope RIGHT (marked UP) turn the screw
counter-clockwise. For example, if you're hitting
above the target, you want to lower the scope to
meet the target, so adjust the screw DOWN.
Electronic Copy of LTI's Impulse User's Manual 8
Action
Position the target.
You need an isolated,
reflecting target at least 90
meters away. It should be
visible, but should present
as small a target area as
possible.
Position the
Use a stable tripod that
instrument.
allows easy movement of
the instrument in two
planes.
Notes/Explanation
th
Edition © October 1998
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