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2. Horizontal Point Accuracy
Check accuracy using two walls 20' apart.
1.
Set laser next to Wall A. Mark
beam height on Wall A as point A1.
(Figure 15)
2. Rotate laser 180°. Mark beam height
on Wall B as point C. (Figure 16)
3. Set laser next to Wall B and adjust
beam to height C. (Figure 17)
4. Rotate laser 180°. Mark beam height
on Wall A as A2. (Figure 18)
5. Measure the vertical distance between
A1 and A2. If this distance is <1/16" at
20', your horizontal accuracy is within
specification.
NOTE: If your laser needs non-warranty service or calibration, return
it to a Johnson authorized service center for repair.
©2023 Johnson Level & Tool
Figure 15
Figure 16
Figure 17
Figure 18
17
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