User Manual

©2007 Johnson Level & Tool
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2. Fine detection
1. power symbol
2. fine detection symbol
Press coarse/fine detection button. The
detector is now in fine detection.
Move the instrument up and down like the
coarse detection procedure.
(e) Horn
Press the horn button. The sound symbol is displayed and the horn
is ready for the sound function. The detector then conducts
coarse/fine detection through sound (beep) signals.
When the horn signal is a fast beep, move the detector up.
When the detector makes short beep, move it down.
When the detector makes a continuous sound, it is level with the
laser beam.
If there is no beep heard, the instrument has not received the laser
beam signal.
(f) Turn-off timer
The detector will automatically turn off if it has not received a laser
signal for 10 minutes
(g) Detector Maintenance
When you are done using the detector, return it to its case.
Keep the instrument, particularly the detecting window, clean. If
unit becomes dusty, use a clean cloth to gently wipe it clean.
Figure 6