Collimation Error - Prexiso T.O.2 Manual Del Usuario

5.5 Collimation Error

Inspection
Adjustment
Inspection and Adjustment
1. Fix the instrument on the tripod and perform precise leveling up.
2. Aim at object point A in the distance with the normal position of telescope and take
the reading of the horizontal angle HRnorm and aim at object A with the reverse posi-
tion of the telescope and take the reading of the horizontal angle HRrev then:
Collimation Error C = (HRnorm - HRrev ± 180°)/2
If C <10", no adjustment is required; if C >10", adjustment is required.
1. Adjust the horizontal fine motion in the reverse position of the telescope so that the
reverse reading HRrev' = HRrev + C.
2. Remove the protective cover of the reticle of the telescope and adjust both the left and
right adjusting screws so that the vertical hair of the reticle coincides with object A.
3. Repeat the steps in "Inspection" and "Adjustment" until acceptable condition is
reached.
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