Johnson Level & Tool Mfg. 40-6510 - Manual (Page 18)

18 ©2007 Johnson Level & Tool
• Avoid knocking the unit over or allowing it to fall on the ground.
• Although the instrument is rain resistant, you should avoid
submerging the unit in water or other liquids. If unit comes into
contact with water or other liquids, wipe it dry immediately.
• Do not use unit around fire or expose it to fire in any way.
8. Self-Check
IMPORTANT: It is the responsibility of the user to verify the
calibration of the instrument before each use.
Level Vial Self-Check
A. X/Y-Direction Level Vial Self-Check
1. Fix the instrument on a platform or a tripod. A tripod with level
vial is preferable.
2. Center the bubbles of X/Y-direction vials by adjusting the
leveling knob.
3. Turn the instrument by 90° 3 times to observe whether the
bubbles are centered at all position, the instrument is now level.
B. Z-Direction Vial Self-Check
1. Put the instrument with
adjusted X/Y-direction
vials on tripod 3 feet (1m)
from wall A, and level the
laser. Project laser beams
to wall A and wall B respectively, and mark the laser points
shown on walls as e1 and f1.
3’
50’