Johnson Level & Tool Mfg. 40-6656 User Manual

Page 13

Self-Calibration Adjustment
See the following figure. There are two self-calibration apertures on
the instrument. The self-calibration aperture A corresponds with the
adjustment of the fore/aft direction. The self-calibration aperture B
corresponds with the adjustment of the left/right direction.

1. When adjusting, use a 3mm hex tool.
2. The adjustment of both directions will influence each other.

When making fine adjustments in the left/right direction, it
might influence the front/back axis. Be sure to repeat the
adjustment of both axis when making adjustments to ensure
both are accurate.

3. When making adjustment with the adjusting screw, you should

not exceed four complete turns of the screw(s).

4. If the unit is still not able to be calibrated, it may be outside

of its adjustment range and should be sent to the nearest
service center.

7048H_Manuals 6/19/13 10:53 AM Page 13

This manual is related to the following products:

40-6650