Optical Plummet - Sokkia CX Series Operator's Manual

5. Do the calculations:
A2-A1 and B2+B1
If A2-A1 is within 180°±20"and
B2(B1 is within 360°±40", adjust
ment is unnecessary.
Example:A2-A1 (Horizontal angle)
=198° 34' 20"- 18° 34' 00"
=180° 00' 20"
B2-B1 (Vertical angle)
=269° 30' 00" + 90° 30' 20"
=360° 00' 20"
If the difference is large even after
repeating the check 2 or 3 times,
have our service representative
perform the adjustment.

35.6 Optical Plummet

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
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:
35. CHECKS AND ADJUSTMENTS
°
and
269