Checks And Adjustments; Circular Level - Topcon AT-B2 Instruction Manual

7. CHECKS AND ADJUSTMENTS

7.1 CIRCULAR LEVEL

1
Adjust the leveling foot
screws to center the
bubble in the circular level.
2
Turn the instrument 180°
(or 200 gon).
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
using the hexagonal
wrench.
5
Turn the instrument 180°
(or 200 gon). If the bubble
remains in the circle,
adjustment is complete.
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