©2012 Johnson Level & Tool
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5. Move the tripod within .6m of target “A”. Make a mark where
the cross meets target “A” and label as “A2”.
6. Rotate the laser 180º and make a mark where the cross
meets target “B” and label as “B2”.
7. Calculate (A1-A2) - (B1-B2) = E. If the absolute value of E is
above 1mm, the laser accuracy is out of tolerance and
calibration is required.
Self-Check and Calibration
The instrument has two calibration apertures. Aperture “A” adjusts
the horizontal axis. Aperture “B” adjusts the vertical axis.
Notes regarding adjustment:
•
Use a 3mm hexagon tool for adjustment.
• The adjustment of each axis may influence the other. When
making fine adjustments in the left/right direction horizontally,
the front and back direction vertically may change. When
adjusting the front/back direction vertically, the left and right
direction will possibly change. Adjustments may need to be
checked and repeated alternately.
• The adjustment of the self-calibration screw cannot exceed
four turns in either direction.
• If the laser accuracy cannot be adjusted through self-calibration,
please contact an authorized repair facility, or contact Johnson
Level & Tool.
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