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©2009 Johnson Level & Tool - Rev. 1
Vertical Calibration
Put the angle level on a smooth
vertical plane and observe the LCD
display. Note the reading after 10
seconds. Then turn the angle level
180º on the same plane. After
another ten seconds note the second
angle reading. The calibration is
necessary if the difference between
the two measuring readings is
over 0.1%.
Calibration in the Horizontal Direction
1. Put the level on a flat surface and press the “CAL” button. -0- will
be displayed. Wait 10 seconds.
2. Press the “CAL” button again and -1- will be displayed. Turn the
level 180 degrees on the same surface. Wait another 10 seconds.
3. Press the “CAL” button once again. If it beeps once the calibration
is completed, it is correct. If it beeps twice the calibration is not
completed and the procedure should be repeated. If it continues
to beep twice the sensor may have been damaged and the unit
should be serviced.
4. Then do the same thing for the vertical with both the logo on the
top and with the logo on the bottom.
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