Index Error Of Vertical Circle - Prexiso T.O.2 Manual Del 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 instru-
ment 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.
Inspection and Adjustment T.O.2 | 35