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15.6 Adjustment of Vertical Index Difference ( I angle) and Vertical
Angle 0 Datum
Inspect the item after finishing the inspection and adjustment of item 15.3 and 15.4.
Inspection
1. Power on after leveling the instrument. Sight object A in left position and read the
Verticail angle value L.
2. Rotate the telescope. Sight object A in right position and read the Verticail angle value
R.
3.If the vertical angle is
０
°in zenith,
ｉ＝
(
Ｌ＋Ｒ－
360°)
／２
If the vertical angle is
０
°in horizon
ｉ＝
(
Ｌ＋Ｒ－
180°)
／２
or
(
Ｌ＋Ｒ－
540°)
／２
.
4. If
｜ｉ｜
≥10
″
set the Vertical Angle 0 Datum again.
Adjustment
1.After leveling the instrument, enter the adjustment mode:
2.Press 2 , in left position rotate the telescope. Precisely sight any target A at the same
height as the instrument, the vertical angle is displayed.
3.Rotate the telescope and precisely sight the same target A, press
F4
