Topcon DS Series - Page 179

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24. CHECKS AND ADJUSTMENTS
 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.
8. Turn the upper part of the instrument horizontally
and check that the laser beam is now aligned with
the target center.
9. Re-attach the laser plummet adjustment cap.

• Tightening each of the fine adjustment screws moves the laser plummet beam in the directions
shown below.
Fig. B
Up
Right
Left
Down
Tighten "Up" screw
Tighten "Left"
screw
Tighten "Down" screw
Tighten "Right"
screw
Fine adjustment screws
Laser plummet adjustment cap
pointing towards user