Johnson Level & Tool Mfg. 40-0918 - Manual (Page 8)

8 ©2013 Johnson Level & Tool - Rev. 3
8. Self-Check & Fine Calibration
IMPORTANT: It is the responsibility of the user to verify the
calibration of the instrument before each use.
Checking for Accuracy:
1. Start by placing the laser 1’ away from a wall (near wall), and
at least 20’ from a wall (far wall).
2. Align the laser so that one axis (vial) points to both walls.
3. Turn the laser on and adjust the thumbscrews until the unit is
level in both the X and Y axis.
4. Make a mark where the laser hits the near wall (wall #1), and
then the same for the far wall (wall #2).
5. Next, move the laser to 1’ next to the far wall, and ensure it is
in the same axis.
6. Level the laser, and then adjust the height so that the laser is
level and hits the mark you made on the far wall (wall #2).
You may need to re-level to achieve this.
Vertical Line
Horizontal Reference Line
Wall
Platform
7294H-English_Manuals 8/26/13 10:27 AM Page 8