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PROCEDURE Adjusting
1. Turn the laser plummet adjustment cap
anticlockwise and remove.
2. Emit the laser plummet beam.
3. Note the current position (x) of the laser beam.
4. Turn the upper part of the instrument horizontally
through 180° and note the new position (y) of the
laser beam.
Adjustment will bring the laser beam to a point
midway along a line drawn between these two
positions.
5. Check the position of the desired final position.
Place a target so that its center is aligned with the
desired final position.
The remaining deviation will be adjusted using the
4 fine adjustment screws.
:
• Be extremely careful to adjust all the fine
adjustment screws by the same amount so that
none will be over-tightened.
• Turn screws clockwise to tighten.
6. When the laser beam is on the upper (lower) part
of Fig. A the up/down adjustment is made as
follows:
Insert the provided hexagon key wrench into
both the upper and lower screws.
Slightly loosen the upper (lower) screw and
tighten the lower (upper) screw. Make sure that
the tightening tension for both screws is
identical. Continue to adjust until the laser
beam is on the horizontal line of the target.
7. When the laser beam is in the right (left) part of
Fig. B the left (right) adjustment is made as
follows:
Insert a hexagon key wrench into both the left
and right screws.
Slightly loosen the right (left) screw and tighten
the left (right) screw. Make sure that the
tightening tension for both screws is identical.
Continue to adjust until the laser beam is
aligned with the target center.
x
Desired final position
Fine adjustment screws
145
21. CHECKS AND ADJUSTMENTS
y
Target
Desired final position
Fig. A
Fig. B
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