User's Manual

16
2.3 Centering
2.3.1 Centering with Optical Plummet (Optional)
Turn the focusing ring of the optical plummet to focus the ground mark point. Then adjust
three foot-screws to center the bubble of the circular level. If the plate level is not
leveling-up, you can loosen the center screw of the tripod, and move the instrument to
center the bubble of the plate level. At last tighten the center screw.Repeat above steps
until the center of reticule always coincides with the mark point when rotating alidade of
instrument.
Note: You’d better use the three leveling screws and tripod to center the instrument.
2.3.2 Centering with Laser Plummet
Press the key Ǐƾǐ to enter into the display
as shown in the left figure.
Operation Steps:
ķClick the “target” button,and you can turn
on laser plummet and set it as three levels of
brightness.Thus,that laser emits downwards
can be seen.
ĸ Loosen the center screw of tripod,and
move the base plate on tripod head until the
laser spot coincides with ground mark
point.Then tighten the center screw.
ĹRepeat leveling and two steps until the instrument keeps leveling and the laser spot
coincides with ground mark point when rotating alidade of instrument in any direction.
ĺAfter centering,please turn off laser plummet to save power.
Plummet
Center
Optical
plummet
Crossmark