Ment 7.2 Levelling - Sokkia 130R Series Operator's Manual

7. SETTING UP THE INSTRUMENT
7.2 Levelling
Instrument can be levelled using the screen.
" Levelling on the screen"
PROCEDURE
1. Center the surveying point in the
reticle
Adjust the levelling foot screws to
center the surveying point in the
optical plummet reticle.
2. Center the bubble in the circular
level
Center the bubble in the circular
level by either shortening the tripod
leg closest to the offcenter
direction of the bubble or by
lengthening the tripod leg farthest
from the offcenter direction of the
bubble. Adjust one more tripod leg
to center the bubble.
3. Center the bubble in the plate level
Loosen the horizontal clamp to turn
the upper part of the instrument
until the plate level is parallel to a
line between levelling foot screws
A and B.
Center the air bubble using
levelling foot screws A and B.
The bubble moves towards a
clockwise rotated levelling foot
screw.
24
Tripod legs
adjustment