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11.2.
Circular Level
Check
After the level tube is calibrated correctly and if the circular level bubble also
in center, so there is no need to calibrate.
Calibration
If the bubbles are not in the center, use the correction needle or six angle wrench
to adjust the correction screw which is under the bubble to move the bubble to the
center. For calibration, you shall first loosen the calibration screw (1 or 2) which is
opposite to the direction of the bubble offset, then tighten the other correction screw
in the offset direction to make the bubble in the center. When the bubble is in center,
make sure the fastening force of the three calibration screws are consistent.
11.3.
Reticle of the telescope
Check
1.
Aim at a target ‘A’ from the telescope after leveling the
instrument with the cross wire on the reticule. Lock the instrument with vertical
and horizontal locking knob after aiming at A.
2.
Rotate the vertical slow motion knob, move A point to the edge of the
field of view (A' points).
3.
If ‘A’ moves along the vertical line of the crosshair, but is
still in the vertical line as on the left picture, the crosshair doesn't need to calibrate.
If ‘A’ point deviates from vertical line center, as on the right picture, the crosshair
is slant, so there’s need to calibrate the reticle.
Calibration
1.
First, take down the reticule cover between telescope eyepiece and
focusing hand wheel and you can see four fixed screws of the reticle
bed (sees attached figure).
2.
Unscrew the three fixed screws evenly with screw driver, rotate
the reticle around collimation axis, to make ‘A’ point on the
vertical line of the reticle.
3.
Tighten the screw evenly, test the calibration results with the above
methods.
4.
Cover the reticle.
Summary of Contents for Total Station ATS-120 Series
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