Pentax ETH-310 - Manual (Page 37)

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6. Inspection and Adjustment
6.1 Instructions on inspection and adjustment
• Inspection and adjustment should be done after setting the
instrument on a tripod or on an adjustment stand.
• Inspection should be done sequentially from [6.2 Plate vial] to
[6.5 Perpendicularity of line of sight to horizontal axis]
• Adjustments should be finished with adjustment screws having been
tightened and with firm torque. Do not finish by loosening an
adjustment screw.
• Repeat inspection after adjustment and confirm if the adjustment is
performed correctly.
• It is recommended that a trained professional perform adjustments,
if possible.
6.2 Perpendicularity of plate vial to vertical axis
Inspection
Perform [4.3 Leveling with the horizontal vial]
Rotate the instrument through 90° and confirm if the bubble is
always in the center.
When the bubble is in the center, no adjustment is necessary.
If the bubble moves from the center, following adjustment is required. 1
2
3
Leveling screw
Plate vial