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©2018 Johnson Level & Tool - Rev. 1
Symptom
Unit not accurate
Possible Cause
Unit less than 3/16
″
over 100
′
Unit greater than 3/16
″
over 100
′
Slope mode is engaged
Solution
Follow accuracy check
procedure in operator’s
manual
Unit needs to be
calibrated by a qualified
service technician
Exit slope mode
Laser beam appears
dim or does not
illuminate
Batteries nearing
depletion
In direct sunlight or
bright ambient lighting
Replace batteries
Use a detector when
exceeding 100
′
indoors,
when using indoors with
bright or fluorescent
light, or when using
outdoors
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