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22. CHECKS AND ADJUSTMENTS
4. Level the instrument until the X/Y tilt angles are
±1’. Wait a few seconds for the display to
stabilize, then read the current tilt angle in the X
(sighting) direction and Y (horizontal axis)
direction.
5. Press [OK] and rotate the top of the instrument
and telescope 180° from the current position.
6. Wait a few seconds for the screen to stabilize,
then read the automatically compensated angles
X2 and Y2.
7. In this state, calculate the following offset values
(tilt zero point error).
Xoffset = (X1+X2)/2
Yoffset = (Y1+Y2)/2
If one of the offset values (Xoffset, Yoffset)
exceeds ±10", adjust the value using the following
procedure.
When the offset value falls within the range ±10",
adjustment is not necessary.
Press {ESC} to return to <Instrument constants>.
8. Press [OK] and rotate the top of the instrument
and telescope through 180°.
9. Confirm that the values are in the adjustment
range.
If both correction constants are within the
range the current value ±1’, select [YES] to
renew the correction angle. <Instrument
constants> is restored. Continue to step 11.
If the values exceed the adjustment range,
select [NO] to cancel the adjustment and
return to the screen in step 4. Contact your
local dealer to perform the adjustment.
Results for target point
Results for offset point
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