VERTICAL
MEASUREMENT FOUNDATION
10
of the instrument by 180°. It’s necessary to make further adjustment, if the offset of the bubble is more than 1 graduation. Half
of the value of bubble deviation is necessary to improve with the help of foot screws. Another half – with the help of adjustment
screw of tubular level.
Adjustment of circle level
After adjustment of tubular level, it’s necessary to adjust circular level. If the bubble deviate from the center, adjust its position with
the help of three adjusting screws, which are located under the level (pic.7).
Adjusting
screws of the
circle level
Pic.7
Pic.8
Adjusting
screws of the
reticule
Adjustment of collimation error
Rotate the alidade by 180°, observing the center of croosshair of the target in
the lens. If you see the offset of the crosshair of reticule relatively the crosshair
of the target, it’s necessary to make adjustment:
1) Place the instrument on the tripod or special stand;
3) Turn the alidade of the instrument by 180°, observing the offset of reticule;
the picture 8. Remove the offset by half;
5) Turn the alidade of the instrument by 180°. Repeat the adjustment by remov-
ing the offset completely.
Adjustment of the offset of laser beam
Collimation error between optical and laser axis occurs, If laser spot and the
center of reticule don’t coincide.
For adjustment :
1) Place the instrument on the tripod or special stand;
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