Johnson Level & Tool Mfg. 40-6639 - Manual (Page 17)

©2012 Johnson Level & Tool 17
When adjusting, note:
a. Use a 2.5mm hex-head tool (allen wrench).
b. The adjustment of each aperture may influence each other.
This means that adjusting Aperture 1 may cause
Aperture 2 to change, so a re-check of the previous
Aperture adjustment may be required.
c. The adjustment of the self-calibration screw should not
exceed 4 complete rotations (clockwise or counter-
clockwise direction).
d. If the instrument cannot be calibrated via the Apertures
(device is too far out of spec), then please contact a
distributor, repair facility, or Johnson Level & Tool
Customer Service.
6249H_Manuals 10/18/12 2:49 PM Page 17