Johnson Level & Tool Mfg. 1457-1000 - Manual (Page 9)

©2013 Johnson Level & Tool 9
6. Self-Calibration
To Calibrate this unit:
1. Select a flat horizontal platform as a reference surface, like a
table surface.
2. With the unit turned on, push the ON/OFF button and push in
the MODE button at the same time and let go. The display will
show a 1 “-1-”.
3. Push the ON/OFF button once and the solid “-1-” will become
a blinking “-1-”.
4. After 3 seconds it will display “-2-”.
IMPORTANT: It is the responsibility of the user to verify the
calibration of the instrument before each use.
7122H_Manuals 7/31/13 2:50 PM Page 9