SOUTH
ET
‐
02/05
ELECTRONIC
THEODOLITE
SERVICE
MANUAL
11
SOUTH
SURVEY
&
MAPPING
INSTRUMENT
CO.,
LTD.
11
Keep the bottom of the lower base upward. Uplift the lower base gently along the direction of the red arrow,
then the lower base(it contains horizontal absolute encoder disk) will be separated from the vertical axis.
Note: in order to prevent scattering the vertical axis ball bearings, the bottom of the lower base must be kept
upward. The vertical ball bearings of every ET are assembled as a whole set. So if any ball is broken
or loss
it need to be replaced with a new whole set. So instantly nip all balls into a safety container to avoid any
accident.
Step 14: Plate vial
Totally loosen the adjusting screw by adjusting pin.
Refer to step 3, remove the LCD plate of right cover, remove
the setscrew of the plate vial, then remove the plate vial.
Step 15: Optical plummet
Refer to step 3, remove the LCD plate on the left of the right
cover. Then loosen the 2 fix screws of optical plummet by
hexangular spanner.
Drag the optical plummet gently and save it properly.
Pay attention when assembly: put the ET on the tripod without
leveling. Insert the optical plummet into the main body. Do
not tighten the fix screws, then observe the image form it.
