SHANGHAI ESURVEY GNSS CO., LTD.
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3.3 Level the Circular Level
It is used to do basic levelling-up with the circular level.
To level the circular level, do the following:
1. Adjust foot screw A and B in the opposite
direction until the circular bubble is
perpendicular to a line shaped with foot screw A
and B.
The direction of your left thumb indicates the
movement of the circular bubble.
2. Move the bubble to the center of the circle by
adjusting foot screw C:
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