Johnson 40-6602 Instruction Manual page 12

4069H_Manuals 11/5/10 8:49 AM Page 12
3 Vertical Lines for Plumb
1. Use a plumb line or known vertical reference point.
2. Turn the laser unit on following the instructions above.
3. Rotate the laser unit so the vertical laser line intersects the plumb line.
4. Check all three vertical lines.
5. If the vertical laser line is not parallel with the plumb line (i.e. intersects
at the top and bottom), the unit needs to be recalibrated. (See
calibration information).
Self-Calibration Adjustment
Self-Calibrating the side vertical laser lines (not the front
vertical laser line) for plumb
1. There are two self calibration ports inside the battery compartment.
2. Remove the rubber plugs.
3. Unlock the compensator.
4. Use a 2mm hex head wrench.
5. Turn the calibration screw counter clockwise to
move the top of the side vertical lines back towards
the battery compartment. Move one screw at time.
Do not rotate the screw more then 4 rotations. If the vertical line is
still not plumb after moving one screw 4 rotations, the second screw
can be rotated in the same direction. Do not rotate the second screw
more then 4 rotations.
6. If the vertical lines can not be brought into plumb after 4 rotations of
each screw, the unit will need to be serviced by Johnson Level & Tool.
12 ©2010 Johnson Level & Tool - Rev. 1