Self-check & fine calibration – Johnson Level & Tool Mfg. 40-6602 User Manual

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8. Self-Check & Fine Calibration

IMPORTANT: It is the responsibility of the user to verify the

calibration of the instrument before each use.

Horizontal Line for Level

1. Set the wall mount/tripod adapter on a tripod or flat surface approxi-

mately 10 ft. away from a reference wall.

2. Unlock the transportation lock on the unit.

3. Set the laser inside the wall mount/tripod adapter.

4. Press the horizontal laser line button (H) and the Vertical Laser Line

button (V1).

5. Point the cross line at the reference wall (It is important to see the

laser line very clearly. This test should be performed indoors and
in low light conditions).

6. Mark the intersection of the cross line as point A.

7. Rotate the laser unit counter clockwise until the laser cross line is 8 feet

away from point A (to the left of point A). Mark the laser line at point A
as point B.

8. Rotate the laser unit clockwise until the cross line is 8 feet to the right

of point A.

9. Mark the laser line at Point A as point C.

10. If the distance between point B and point C is greater then 1/16” the

unit needs to be recalibrated. (See calibration information)

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