142
c.
System prompt “Turn to F2”. Rotate the
telescope, and collimate the same target
precisely in Face
Ⅱ
. Press [OK].
Collimate the
prism in reverse
position
[OK]
VO Adjustments
HA:
00
°
00’06”
VA:
265
°
34’05”
OK
d.
The setting is finished
，
screen displays
“Set”, and turns back to Adjustments
automatically.
Note
:
1. Repeat the checking steps to measure the Index Difference (i angle). If the Index Difference cannot meet
the requirement, user should check whether the three steps of the adjustment and the collimation are right.
Then set again according to the requirement.
2. If Index Difference still not meets the requirement after the repeated operation, the instrument should be
returned to factory for inspection and repair.
12.7 OPTICAL PLUMMET
Check
1. Set the instrument on the tripod and place a piece of white paper with two crisscross lines on it right below
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 observe whether the center mark position coincides
with the intersection point of the cross at every 90° .
5. If the center mark always coincides with intersection point, no adjustment is necessary.
Otherwise, the following adjustment is required.
Adjust
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 the center of optical plummet which falls on
the paper at every 90
. As illustrated: Point A, B, C, and D.
3. Draw lines that attach AC and BD and mark the intersection point of the two lines as O.
