Plate Level; Circular Level - Nikon DTM-350 Instruction Manual

4. CHECKING AND ADJUSTMENT

4-1 Plate Level

(Making the axis of the level vial at right angle to the vertical axis of the
instrument)
1) Checking
(1) Set up the instrument on the tripod and follow the leveling procedures
described in [2-5. Leveling] p.2-9.
(2) Rotate the alidade 180°.
(3) Check to see if the bubble remains in the center of the vial. If a
displacement is detected it should be adjusted. Refer to the following
adjustment procedure.
2) Adjustment
(1) Using the adjusting pin supplied,
rotate the plate level's adjustment
screw to move the bubble to
eliminate half of the displacement
detected.
(2) Take up the remaining
displacement with leveling screw
A (refer to the Figure in p.2-9), centering the bubble.
(3) Recheck, and repeat if necessary.

4-2 Circular Level

1) Checking
After confirming the plate level is in
adjustment, check for any displacement
of the bubble's centering in the circular
level. If it is out of adjustment, use the
adjusting pin to manipulate the three
adjustment screws, centering the
bubble.
4
4-1