©2018 Johnson Level & Tool - Rev. 1
13
Horizontal Pitch Accuracy Check
Pitch accuracy refers to the accuracy of the laser between the tool
and the wall and ensures that the horizontal beam is level between
the tool and the wall.
1. Set up two survey-staffs OR use two walls, both a minimum of
15
′
from each other.
2. Set the instrument on a level tripod as close as possible to
staff/wall A.
3. Power on all laser lines and move the laser until the cross dot
projects on the staff/wall A. Make a mark and label as A1.
4. Rotate the instrument 180° and make the cross dot project on the
staff/wall B. Make a mark and label as B1.
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