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23. CHECKS AND ADJUSTMENTS
23.5
Optical plummet
(Check)
Adjust levelling
3)
foot
screws
1) Level the
SET2C
and exactly cen-
tre a surveying point in the reticle
of the optical plummet.
2) Turn the upper part 180"
If the surveying point is still
centred, no adjustment is neces-
sary.
If the surveying point is off-
centre, adjust as follows:
adjust~ng screws
6 % )
Correct halfthe deviation with the
levelling foot screws
@.
Unscrew the optical plummet fo-
cussing ring
@.
'Adjust the remaining half of the
displacement with the 4 adjusting
screws to centre the reticle exactly
on the surveying point.
When surveying point is seen as a
green (gray) area:
O
Loosen the
upper
(lower)
screw slightly.
@
Tighten the lower (upper)
screw by the same amount.
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