Optical Plummet - Pentax R-315EX(NX) Instruction Manual

10.7 Optical plummet

[Checks]
Set the instrument on the tripod, and place a piece of white paper with a cross drawn
1
on it right under the instrument.
Look through the optical plummet, and move the paper so that the intersecting point
2
of the cross comes to the center of the field of view.
Adjust the leveling screws so that the center mark of the optical plummet coincides
3
with the intersecting point of the cross.
Rotate the instrument around the vertical axis. Look through the optical plummet each
4
90° of rotation, and observe the center mark position against the intersecting point of
the cross.
If the center mark always coincides with the intersecting point, no adjustment is
5
necessary.
[Adjustments]
If the center mark does not coincide with the intersecting point, rotate the optical
1
plummet focusing knob cover and remove it.
Mark the point set on the line of sight at each step of 90° on the white paper and call
2
them A, B, C and D.
Join the opposed points (A, C and B, D) with a straight line, and set the intersecting
3
point 0.
Turn the four optical plummet adjusting screws with a adjusting pin so that the center
4
mark coincides with the intersecting point 0.
Repeat from
5
64
and check that adjustment is correct.
4
Adjusting screws