User's Manual

Screw C

Screw B

Screw A

③Turn around the instrument 90°again. Repeat above steps

until the bubble remains in the center of the plate level even

though the instrument is rotated to any position.

4.2.2 Using centering device to center

1) Set up the tripod;

 Open the tripod. Make sure that the three feet of

the tripod are approximately equal in distance from the

center and that the top is leveled. Screw up the three

locking screw;

 Make sure that the center of the tripod top is right

above the station;

 Stamp one foot on the ground with your feet.

2) Install the instrument gently on the top of the tripod

and screw up the screw connection. Open the laser

plummet through star (★) key to aim at the station

precisely;

3) Using circular level to level the instrument coarsely;

4) Using tubular level to level the instrument precisely;

5) Precise centering and leveling;

According to the observation of center device, loose the

connection screw slightly and shift the instrument horizontally

(mention that do not turn around the instrument)until the

instrument aims at the station precisely.