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©2005 Johnson Level & Tool
2. Fine detection
1. power symbol
2. fine detection symbol
• Press coarse/fine detection button. The
instrument is ready for fine detection.
• Move the instrument slightly up and
downwards like the coarse detection
procedure.
• When the instrument displays as shown
in the figure, it is at the right position.
• Tighten the clamp bolt and mark the position of the object on the
rabbet. This mark will be the horizontal reference of the fine detection.
(e) Sound function
• If the instrument is working in a circumstance that makes it difficult
to use the display function, the sound function can be used instead.
• Press the sound function button. The sound symbol is displayed
which means it is ready for sound function. The instrument then
conducts coarse/fine detection through sound (buzz) signals.
• When the sound signal is ultra-short buzz, move the instrument
slightly upwards.
• When the instrument makes short buzz, move it slightly downwards.
• When the instrument makes intermittent, continuous sound, it is at
the right position.
• If there is no buzz heard, the instrument has not received the laser
scanning signal.
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