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Read the target plates on the walls (A,B) to detect the reference points.
If the readings of the target plates differ less than ± 5 mm,the
instrument needs not to be adjusted.
If more than ± 5 mm,proceed to the following (Adjustment)
procedure.
6
7
8
Wall A Wall B
X side in 1 X side in 5
Target
Detector
Appr. 20m Appr. 20m