©2016 Johnson Level & Tool - Rev. 3
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Measuring an angle.
8. Self-Check and Fine Calibration
To guarantee the best measuring precision of the incline, vertical and
leveling plane:
Calibrate before first use.
Before important measurements.
After a hit or drop.
After installing new batteries.
Horizontal Calibration Check
Put the angle level on a smooth level plane and observe the LCD
display. Note the reading after ten seconds. Then rotate the angle
level 180° on the same plane. After another ten seconds note the
second angle reading. Calibration is necessary if the difference
between the two measuring readings is over 0.2°.
IMPORTANT:
It is the responsibility of the user to verify the
calibration of the instrument before each use.
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