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©2016 Johnson Level & Tool - Rev. 1
8.
Calibration
IMPORTANT:
It is the responsibility of the user to verify the
calibration of the instrument before each use.
Horizontal Line Transverse Accuracy Check
Transverse accuracy refers to the accuracy of the horizontal laser
beam projected along the wall, and ensures the beam is level from
left to right
1. Set the instrument on a tripod and place approximately 15 ft
(5m) 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 8 ft (2.5m) from Dot ‘A’ and mark on the wall
as Dot ‘M’.
4. Rotate the instrument 90° and make a mark on the wall 15 ft
(5m) from Dot ‘A’. Label this mark as Dot ‘B’.
8 ft (2.5m)
15 ft (5m)
8 ft (2.5m)
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