Perpendicularity Of Circular Vial To Vertical Axis - Pentax ETH-302 Instruction Manual

2/5/10/20 sec. angle accuracy detachable tribrach
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6.3 Perpendicularity of circular vial to vertical axis

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

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Eth-305Eth-310Eth-320

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