Johnson-level-tool-mfg 40-0918 User Manual download pdf (Page 8)

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

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Johnson-level-tool-mfg 40-0918 User Manual Page 8