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33. CHECKS AND ADJUSTMENTS
254
PROCEDURE Check
1.
Carefully level the CX and exactly
center a survey point in the reticle
of the optical plummet.
2.
Turn the upper part 180
°
and
check the position of the survey
point in the reticle.
If the surveying point is still
centered, no adjustment is
necessary.
If the surveying point is not still
centered in the optical plummet,
adjust as follows:
PROCEDURE Adjustment
3.
Correct half the deviation with the
levelling foot screw.
4.
Firmly hold down the top portion of
the instrument, and remove the
optical plummet knob cover, then
remove the optical plummet reticle
cover on the inside.
Replace the optical plummet knob
cover.
Use the 4 adjusting screws of the
optical plummet to adjust the
remaining half of the deviation as
show below.
33.5 Optical Plummet
Optical plummet
reticle cover
Optical plummet
knob cover