GPI -ZL21R Instruction Manual page 10

Leveling
(1) Leveling with the circular level
By adjust leveling screws A and B,
position the bubble in the center of vial
（Fig.4）.
Adjust the leveling screw C, position the
bubble in the center of circle（Fig.5）.
Screw A
Screw A
- 9 -
Screw B
Fig. 4
Screw C
Screw B
Fig. 5
Screw C