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8. CHECK AND ADJUSTING
55
Horizontal Rotation Cone Error
Perform the following check after completing “Horizontal Rotation Grade Error” on the previous
page.
1Set up the laser centered between two walls approximately 50 m (164 ft) apart. Orient the
instrument so one axis, either X or Y, is facing the walls. Grade should be set to 0% in both axes.
2Locate and mark the position of the RL-SV1S beam on both walls using the LS-80L.
3Turn off the RL-SV1S and move the RL-SV1S closer to wall A (1 m to 2 m /3 ft to 6 ft).
Do not change the axis orientation of the RL-SV1S. Turn the RL-SV1S on.
4Again locate and mark the position of the RL-SV1S beam on both walls using the LS-80L.
5Measure the distance between the first and second marks on each wall.
Standard
location Wall B
Wall A
Approx.50m
Wall B
Wall A
Cone Error
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