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24. TARGET SYSTEM
I
2-point target (2RT500-K)
This target is used for two-distance offset
measurement.
Prism constant: 0
I
Instrument height adaptor (AP41)
This device is used to adjust the height of the
target.
Make sure that the instrument height “236” (mm) is
displayed in the instrument height adjustment
window.
1. Install the tribrach to the instrument height
adaptor.
2. Level the instrument and check the position of the
bubble of the plate level.
3. Turn the upper part through 180° and check the
bubble position.
If the bubble is still centered, no adjustment is
necessary.
If the bubble is off-center, adjust as follows.
4. Correct half of the bubble displacement using
levelling foot screw C.
5. Correct the remaining half of the displacement by
using the adjustment pin to rotate the plate level
adjustment screw.
When the plate level adjustment screw is turned in
the counterclockwise direction, the bubble moves
in the same direction.
6. Rotate the top of the instrument and continue
adjustments until the bubble remains centered for
any position of the upper part.
If the bubble does not move to the center even
when the adjustment has been repeated, ask your
local dealer to adjust it.
• Adjust the optical plummet of the AP41
instrument height adaptor following the checking
and adjustment methods of optical plummet.
C
Height
adjustment
window
