RT-7690-2 User Guide
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7. Turn off the laser beam and the power to the unit.
Caution: The laser beam must be turned off and the power switch in the off position
before proceeding to the next step.
8. Insert an Allen wrench into the side calibration port and locate the calibration screw. Rotate it
clockwise to lower the beam or counterclockwise to raise the beam.
9. Remove the Allen wrench from the calibration port. Turn the power on, turn on the level laser
beam, and check the height of the laser beam. Repeat steps 7 and 8 until the beam is at a
height exactly halfway between marks A and B.
Caution: The Allen wrench must be removed from the calibration port before running the
power on.
10. Mark this calibrated point on the surface as C.
50 ft. (15m)
B
A
C
*
Y
11. Repeat steps 3–7 to confirm the position of C, then proceed to step 12.
12. Rotate the laser unit 90 degrees and position the it with the front facing the vertical surface.
Mark the height of the laser beam as D.
50 ft. (15m)
* D
C
13. Compare the height of D with C. If the height of D matches the height of C, calibration is
complete. Turn the power switch to the off position. Screw back the calibration port covers
and resume normal operation. If the height of D does not match the height of C, proceed to
step 14.
14. Turn off the laser beam and the power to the unit.
Caution: The laser beam must be turned off and the power switch in the off switch before
proceeding to the next step.
15. Insert an Allen wrench into the front calibration port and locate the calibration screw Rotate it
clockwise to lower the beam or counterclockwise to raise the beam.
16. Remove the Allen wrench from the calibration port. Turn the power on, turn on the level laser
beam, and check the height of the laser beam. Repeat steps 14 and 15 until the beam is at the
height of mark C.
