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2. After turning on the power, zero the vertical index. Lock the vertical clamp screw and the
instrument should display the vertical angle value.
3. Rotate the tribrach footscrew X slowly in one direction about 10mm in circumference, and the
error message “b” will appear. The tilt of vertical axis has been increased to more than 3
ˊ
at this
time and exceed the designated compensation range.
Rotate the footscrew X to its original position, and the instrument display screen will show the
vertical angle again, means that the vertical index difference compensation function is working.
Adjustment
If the compensation function is not working, send the instrument back to the service center for
repair.
24.6 Adjustment of Vertical Index Difference ( i angle) and Vertical Angle 0 Datum
Inspect this item after finishing the inspection and adjustment of Item 24.3 and 24.5.
Inspection
1. Power on after leveling the instrument. Aim at object A facing left and read the Vertical angle
value L.
2. Rotate the telescope. Aim at object A facing right and read the Vertical 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”, Vertical Angle 0 Datum should be set again.
·
Adjustment
Operation procedure
Key
Display
1) After levelling the machine, power on, press
CNFG under Home Page screen, as right diagram
shows.
CNFG
Settings
（
1/2
）
1.Obs. Condition
2.Instr.Const
3.Date&Time
4.Comms Setup
5.Unit
6.Key Function
2) Press ▼ key to choose“2. Instr. Const.”and press
ENT key (or press numeric key 2), enter the
instrument constant setting screen.
“２
.Instr.
const
”
+
ENT
Settings
（
1/2
）
1.Obs. Condition
2.Instr.Const
3.Date&Time
4.Comms Setup
5.Unit
6.Key Function
