©2014 Johnson Level & Tool - Rev. 3
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8. Self-Check and Fine Calibration
Checking the Calibration
Select a flat and horizontal platform as a reference
surface, like a table-surface.
1. Place the laser digital level on this reference
surface, as shown in figure 1, and then record
the measured angle reading. Record this as A1.
2. Turn the laser digital level 180 degrees, as
shown in figure 2, and then record the
measured angle reading. Record this as A2.
3. If A1-A2 is greater than 0.2º, it is necessary to
calibrate the horizontal accuracy.
Calibration
1. Press and hold the CAL key for 3-plus seconds, unit will beep once.
When the LCD shows -0-, it means the instrument has entered the
calibration status.
2. Place the laser digital level on the horizontal reference surface, as
shown in figure 5, after 10 seconds, press the CAL again, and the
LCD shows -1-.
IMPORTANT:
It is the responsibility of the user to verify the
calibration of the instrument before each use.
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