User's Manual

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;