Johnson Level & Tool Mfg. 40-6770 - Manual (Page 4)

4 ©2010 Johnson Level & Tool
(d) Detection
1. Coarse detection
• Aim the receiving window at the
rotating laser. Loosen the adjusting
bolt and move the detector up and
down to receive the laser signal
transmitted by the rotating laser.
• When the detector displays like
Fig. (A), move the detector slightly
down as indicated by the arrow.
When it displays like Fig. (B), move
it slightly up as indicated by
the arrow.
• When Fig. (C) is displayed, the
detector is level with the rotating laser beam..
• Tighten the adjusting bolt and mark the position on the grade rod
next to the rabbet. This mark will be the horizontal reference in the
coarse mode.
3708H_Manuals 7/20/10 11:27 AM Page 4