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41.EXPLANATIONS
The 0 index of the vertical circle of your instrument is almost 100% accurate, but when it is necessary to perform
particularly high precision vertical angle measurements, you can eliminate any inaccuracy of the 0 index as
follows.
• If the power is cut off, the vertical circle indexing is ineffective. Do it again every time the power is turned on.
• If it necessary to renew the registered collimation offset constant in your instrument, perform the collimation
checking and adjusting.
"35.3 Collimation"
PROCEDURE
1. Select “Obs. condition” in Config mode. Set “V manual”
(vertical circle indexing method) to “Yes”.
2. Press [OBS] on the status screen.
The electric circular level is displayed in the screen.
3. Carefully level the instrument and press [OK].
The vertical angle V1 is displayed under “Take F1.”
4. Accurately sight a clear target with a distance of about 30 m
in the horizontal direction with the telescope in Face 1.
Press [OK]. The vertical angle V2 is displayed under “Take
F2.”
5. Turn the upper part through 180° and clamp it. Then set the
telescope in the Face 2 position and accurately sight the
same target.
Press [OK].
The vertical and horizontal angles are displayed.
This concludes the vertical circle indexing procedure.
41.1 Manually Indexing the Vertical Circle by Face 1/2 Measurement
O K
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