18 ©2010 Johnson Level & Tool - Rev. 1
Note:
1. While detecting a horizontal laser beam, it is necessary to
have the horizontal bubble vial centered, as the tilt of the
detector will influence its receiving accuracy.
2. Keep the detecting window facing
the rotating laser.
3. Keep the detector still while
detecting the laser beam
4. When the laser beam is centered,
mark at the front reference marker.
5. When the detector does not
receive a laser signal for 6
minutes, and there are no
buttons pushed during these
6 minutes, the middle signal
indicator will turn green first
and then turn red. The horn
will give two short sounds and
the detector will power off automatically.
Horizontal Vial
3515H_Manuals 6/2/10 9:00 AM Page 18
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