CHC
CTS-112R4 user manual
101
4)
Rotate the telescope, aim to the same target in face II (right position), press [F4] (OK) 10 times.
5)
After setting, the screen returns to ADJUSTMENT menu. After finishing setting, the screen returns to
the ADJUSTMENT mode.
15.8.
Optical plummet
Inspection
1)
Set the instrument on the tripod and place a piece of white paper with two perpendicular lines,
then intersect drawn on it directly under the instrument.
2)
Adjust the focus of the optical plummet and move the paper so that the intersection point of the
lines on the paper comes to the center of the field of view.
3)
Adjust the leveling screws so that the center mark of the optical plummet coincides with the
intersection point of the cross on the paper.
4)
Rotate the instrument around the vertical axis and at every 90°
observe whether the center mark
position coincides with the intersection point of the cross.
5)
If the center mark always coincides with intersection point, no adjustment is necessary. Otherwise,
the following adjustment is necessary.
Adjustment
1)
Take off the protective cover between the optical plummet eyepiece and focusing knob.
2)
Fix the paper. Rotate the instrument and mark the point of fall of the center of optical plummet on
the paper at every 90°.
As illustrated: point A, B, C,D.
3)
Draw lines that attach AC and BD and mark the intersection point of the two lines as O.
4)
Adjust the four adjusting screws of the optical plummet with an adjusting pin until the center mark
coincides with point O.
