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©2018 Johnson Level & Tool
One-Point Bubble Calibration Method
1. With the instrument powered on, hold the level against a flat
surface such as a wall. Adjust the level until the bubble is
centered in the horizontal vial.
2. Making sure that the position of the bubble in the horizontal vial
does not change, press hold and simultaneously. The level
will display “Cal”
3. Press to enter the value.
4. The Cal will flash for 3 seconds, emit a short beep and “rdy” will
appear on the LCD displays, indicating that the level is calibrated
and ready for use.
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