Pentax ETH-310 - Manual (Page 39)

39
6.3 Perpendicularity of circular vial to vertical axis
Inspection
Confirm if the bubble of the circular vial is in the center after
the inspection and adjustment of [6.2 Plate vial].
No adjustment is necessary if the bubble of the circular vial is
in the center but if not, the following adjustment is required.
Adjustment
Move bubble to the center by rotating the bubble adjusting
screws, using the adjusting pin.
Inspect again.
1
2
1
2
Circular vial
Bubble adjusting screws