Zipp02 | 36Inspection and Adjustment
5.6 Index Error of Vertical Circle
Inspection 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; other-
wise, perform adjustment.
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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