CST/BERGER CST202, Instruction Manual

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③
Check if there is displacement while traveling along vertical reticle. If not, your done.
【
NOTE
】 ：
After you finish it , you should perform adjustment as follows:
“24.3adjusting the telescope axis”
，
“23.1 Tilt zero point error check and adjustment”
“23.2Vertical circle index error and collimation error.
24.3 Adjusting the telescope axis
●
Check
① Set the instrument up with clear sights of about
50 to 60 meters of both sides of the instrument.
② Sight point A at approximately 50 meter distance
.
③ Loosen the vertical tangent screw only and plunge the
telescope 180°around the horizontal axis so that the
telescope is pointed in the opposite direction.
④ Sight point B, at equal distance as point A.
⑤ Loosen the horizontal motion clamp and
tangent screw and revolve the instrument
180°or 200g. Fix a sight on point A once more
and tighten the motion clamp and screw.
⑥ Loosen the vertical motion clamp and
tangent screw and plunge the instrument
180°or 200g and fix a sight on point C, which
should coincide with the previous point B
.
⑦ If point B and C do not coincide, adjust in the following order:
● Adjustment
① Unscrew the cross-hair adjustment section cover.
② Find point D at a point between points C. B, which should be equal to
1/4 the distance between points B and C, and measured from point C.
This is because the apparent error of BC is four times of the real error
since the telescope has been reversed twice during checking operation.
③ Shift the vertical cross-hair line and coincide it with point D, by
revolving the left and right capstan adjustment screws. Upon completing the adjustment, repeat
the checking operation once more. If point B and C coincide, further adjustment is not required.
Otherwise, repeat the
adjustment.
PLEASE NOTE: THIS PROCESS SHOULD BE USED A CHECK. ONLY A PROPERLY
TRAINED SERVICE TECHNICIAN SHOULD MAKE ADJUSTMENTS.
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