Johnson Level & Tool Mfg. 40-6656 - Manual (Page 10)

10 ©2013 Johnson Level & Tool
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 Accuracy Self-Check (Transversely)
1. Set the instrument on a tripod and place approximately 5
Meters from a wall.
2. Unlock the unit and power the unit on.
3. Face the cross-line laser line to the wall, and set the center as
Dot ‘A’. Make a mark on the wall for Dot ‘A’. Make another
mark on the wall 2.5 Meters from Dot ‘A’ and mark on the wall
as Dot ‘M’.
4. Rotate the instrument 90° and make a mark on the wall 5
Meters from Dot ‘A’. Label this mark as Dot ‘B’.
7048H_Manuals 6/19/13 10:53 AM Page 10