6.5 Perpendicularity of line of sight to horizontal axis
Inspection
1Set an object (point A) at a distance of 30 to 50m away from the instrument and sight it through the telescope.
2Loosen the telescope clamp screw and reverse the telescope around the horizontal axis. Mark a point set on the line of sight at about the same distance to the object point A, and call it point B.
3Loosen the horizontal clamp screw, and rotate the instrument around the vertical axis. Sight point A again.
4Loosen the telescope clamp screw, and reverse the telescope around the horizontal axis. Mark a point on the line of sight at about the same distance as point B, and call it point C.
5No adjustment is necessary if point B and C coincide, but if it does not - Consult with your dealer.
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