Adjusting The Optical Crosshair - Leica LS10 User Manual

14.4
Adjust the Optical
Crosshair
Step-by-Step
LS10/LS15, Check & Adjust
First position (station 1):
• Position the instrument on the outside of staff A at the distance a.
• The distance a should be approximately 15 m - 20 m and be equal to the distance
between staff A and B.
• The following requirement must be fulfilled: 0.2 x D < Dist_A1 < 0.4 x D and
D = Dist_A1 + Dist_B1.
Second position (station 2):
• Position the instrument on the outside of staff B at the distance a.
• The following requirement must be fulfilled: 0.2 x D < Dist_B2 < 0.4 x D and
D = Dist_A1 + Dist_B1.

Adjusting the Optical Crosshair

Step Description

To check if the optical crosshair needs adjustment, first adjust the line-of-
sight error. Pay attention to the Reticle value which is displayed in the Result
screen:
1. The crosshair adjustment
screw is underneath the
eyepiece and is covered by a
protective cap. Pull out the
cap about 1 cm and slightly
press it to the side.
2. Using an allen key, turn the
adjustment screw to move
the optical crosshair until the
optical height reading corre-
sponds with the Reticle value
on the screen.
3. Gently remove the allen key and put the protective cap back in place.
Take an optical height reading and check if this value
corresponds with the Reticle value of the Result
screen. If not, you need to adjust the optical crosshair.
1 1
2b 2b 2b
2a 2a 2a
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