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