CHC
CTS-112R4 user manual
95
15.
Check and adjustment
The instrument has been checked and adjusted strictly in the factory and meet the quality requirement.
But the long-distance transportation and the change of the environment will have great influence on
internal structure of the instrument. So before using the instrument should be checked and adjusted
according to the items of this section.
15.1.
Bubble level
Inspection
Refer to section 6.2
“
Instrument setup
”.
Adjustment
1)
If the bubble of the plate vial moves from the center, bring it half way back to the center by
adjusting the leveling screw, which is parallel to the plate vial. Correct the remaining half by
adjusting the screw of plate vial with adjusting pin.
2)
Confirm whether the bubble does is in the center by rotating the instrument 180
°
. If not, repeat
procedure 1.
3)
Turn the instrument 90
°
and adjust the third screw to center the bubble in the vial.
4)
Repeat inspection and adjustment steps until the bubble remains in center with the vial in any
direction.
15.2.
Circular level
Inspection
No adjustment is necessary if the bubble of the circular vial is in the center after inspection and
adjustment of the plate vial.
Adjustment
If the bubble of the circular vial is not in the center, bring the bubble to the center by using the adjusting
pin or hexagon wrench to adjust the bubble adjusting screw. First loosen the screw opposite to the
offset side, and then tighten the other adjusting screw on the offset side, bringing the bubble to the
center. After the bubble stays in the center, keep the tightness of the three screws in uniform.
15.3.
Adjustment of reticle
Inspection
1)
Sight object A through the telescope and lock the horizontal and vertical clamp screws.
2)
Move object A to the edge of the field of view with the vertical tangent
screw(point A′)
.
3)
No adjustment is necessary if object A moves along the vertical line of
the reticle and point A′
still in
the vertical line.
4)
As illustrated, A
′
offsets from the center and the cross-hair tilts, then need to adjust the reticle.
