8. CHECK AND ADJUSTING
Horizontal Rotation Cone Error
Perform the following check after completing “Horizontal Rotation Grade Error” on the previous
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.
location Wall B