e) Orient the instrument to Wall B by turning it in 180 angle. Adjust the adjusting screw to make
red laser point coincide with f2 on Wall B.
f) Check if the bubble for level vial of Z direction is centered, if it is deviated out of one grid, it
needs adjustment.
0.9m
21m
0.9m
21m
2. Adjustment
Adjust the hexagonal socked screw with the hexagon ring spanner in the adjust-hole of level vial
of Z direction. It's OK when the bubble has been centered.