Linertec LTS-200 Series, Instruction Manual

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54
11.4 Perpendicularity of line of sight to horizontal axis
[Checks]
①
Position a target Point A at a distance 30m - 50m away from the instrument, and sight it
with the telescope.
②
Loosen the telescope lock screw and turn the telescope until a point is sighted at a distance
roughly equal to that of Point A. This is Point B.
③
With the telescope still reversed, loosen the horizontal lock screw and rotate the instrument
around the vertical axis, and sight Point A again.
④
Loosen the telescope lock screw and turn the telescope until a point is sighted at a distance
equal to that of Point B. This is Point C.
⑤
No adjustment is necessary if Point B and C are aligned.
[Adjustments]
①
If Points B and C are not aligned, mark Point D at 1/4 the length of the BC, from Point C
in the direction of Point B.
30-50m 30-50m
A
B
D
C
①
③
②
②
④
Reticle adjusting screws