Index Error Of Vertical Circle - Prexiso T.O.2 Manual De Usuario

5.6 Index Error of Vertical Circle

Inspection
Adjustment
1. Fix the instrument on the tripod and perform precise leveling up.
2. Aim the telescope at any object point P in the normal position and take the
reading of vertical angle Vnorm.
3. Turn the telescope to the reverse position and aim it at point P again. Take the
reading of other vertical angle VRev.
4. If (Vnorm + VRev) - 360° = 2I, I ? 15", no adjustment is required; otherwise,
perform adjustment.
1. Press and hold R/L + HOLD buttons and press
ON/OFF button. Release ON/OFF button when
full character display appears and release
R/L + HOLD buttons when four beeps are heard.
2. Sway the telescope near horizontal plane with
instrument in the normal position and allow
vertical angle to be reset after zero cross. Aim the
telescope in the normal position at object P and
press 0SET to confirm.
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