6
plate vial parallel with the line connecting leveling screw A and B, then bring the bubble to the
center of the plate vial by turning the leveling screws A and B.
Rotate the instrument 90
°
(100gon) around its vertical axis and turn the remaining
leveling screw or leveling C to center the bubble once more.
Repeat the before procedures for each 90
°
(100gon) rotation of the instrument and check
whether the bubble is correctly centered in all directions.
5). Centering by using the optical plummet(or laser plummet)
Adjust the eyepiece of the optical plummet telescope to your eyesight. Slide the instrument
by loosening the tripod screw; place the point on the center mark of the optical plummet.
Sliding the instrument carefully as to not rotate the axis will allow you to get the least
dislocation of the bubble. (Press
★
after power on, then press
[
▶
]
(LASER) key to turn on the
laser plummet.Slide the instrument by loosening the tripod screw; Place laser facular on the
occupied point, sliding the instrument carefully as to not rotate the axis will allow you to get
the least dislocation of the bubble. The last, press
[
▶
]
key, and laser plummet will be turned
off .)
6). Complete leveling the instrument
Level the instrument precisely as in Step 4. Rotate the instrument and check to see that the
bubble is in the center of the plate level regardless of the telescope direction then tighten the
tripod screw firmly.
Press
★
key,then press 2 key to enter the E bubble page.
