Checks And Adjustments; Circular Level - Sokkia B20 Operator's Manual

8. CHECKS AND ADJUSTMENTS

8.1 CIRCULAR LEVEL

1) Adjust the leveling foot screws
to center the bubble in the
6
circular level
2) Turn the instrument
180°(or 200 gon). (Fig.8.1)
If the bubble is inside the circle,
no adjustment is necessary. If
the bubble shifts from within the
circle, adjust as follows:
3) Compensate for one-half of the
shift by adjusting the leveling
foot screws
4) Eliminate the remaining half shift
with the circular level adjusting
screws
wrench
16
5) Turn the instrument 180°(or
200 gon). If the bubble remains
in the circle, adjustment is com-
plete.
.
5
. (Fig.8.2)
6
using the hexagonal
4
. (Fig.8.3)
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Fig.8.1
Fig.8.2
Fig.8.3