SOUTH
ET
‐
02/05
ELECTRONIC
THEODOLITE
SERVICE
MANUAL
24
SOUTH
SURVEY
&
MAPPING
INSTRUMENT
CO.,
LTD.
24
Press “OSET” to enter the next step. Be aware that aiming at
different graduation on the vertical crosshairs of the scale in
horizontal collimator will affect the V value. As shown in the
figure, value V is 90°00’00”
。
Reverse the instrument to circle right and sight at the same
graduation, note down the value.
Press “OSET” to save the adjustment and the screen will
display the angle.
Be aware that, if the I Angle error is too much deviation, “E-
20” will be displayed. Press “HOLD”, then “OSET”, and
“HOLD” again for force alignment
After force alignment, the I Angle needs to be readjusted. If the I Angle doesn’t meet the requirement, repeat
the above steps for adjustment.
8. Optical Plummet
Set the instrument on a tripod and place a piece of white paper
with two perpendicular lines on the ground. As shown in the
figure, adjust the focus of the optical plummet and move the
paper so that the intersection point of the lines on the paper
comes to the center of the field of view.
Rotate the instrument for 180° and observe whether the center
mark position coincides with the intersection of the cross. If not, it is necessary to adjust.
As shown in the figure, rotate the instrument for 180°, the
center mark doesn’t coincides with intersection which means it
is necessary to adjust. The working principle is that, use the
correction pin to adjust with 1/2 offset, and first loosen then
tighten.
