24
bottom of the unit to make sure it is secured to the
tripod.
3)
Using the circular level to level the instrument
coarsely
①
Twist and adjust the two leveling screw A and B
on the bottom of the instrument until the bubbles
of the circular level moves to the line
perpendicular to the center line the screw A and B;
②
Twist and adjust leveling screw C to move the
bubble to the center of the circular level.
center
buble
Screw C
Screw B
Screw A
4)
Using the plate level to level the instrument precisely
①
Loosen the horizontal locking screw and turn the
instrument around until the plate level is
perpendicular to a line shaped with screws A and
B. Adjust the screws A and B to make the bubble
in the center of the level;
Screw C
Screw B
Screw A
②
Turn the instrument approximately 90° and adjust
screw C until the bubble in the center of the level;
