26. EXPLANATIONS
162
The 0 index of the vertical circle of your instrument is almost 100% accurate, but when it is necessary
to perform particularly high precision angle measurements, you can eliminate any inaccuracy of the 0
index as follows.
G
• If the power is cut off, the vertical circle indexing is ineffective. Do it again every time the power is
turned on.
PROCEDURE
1. Select “Obs.condition” in <Configuration>. Set “V
manual” (vertical circle indexing method) to “Yes”.
C
<V manual 0 set> is displayed.
2. Carefully level the instrument.
3. Accurately sight a clear target with a distance of
about 30m in the horizontal direction with the
telescope in face left.
Press
[OK]
. The vertical angle V2 is displayed
under "Take F2".
4. Turn the upper part through 180° and clamp it.
Then set the telescope in the face right position
and accurately sight the same target.
Press
[OK]
.
The vertical and horizontal angles are displayed.
This concludes the vertical circle indexing
procedure.
26.2
Manually Indexing the Vertical Circle by Face Left, Face Right
Measurement
Summary of Contents for DS-101AC
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