Johnson Level & Tool Mfg. 40-6790 - Manual (Page 7)

Note: In the fine detecting mode, when the laser signal in near the on
grade position, the displaying arrow will decrease in size.
Sound functions
When the detector is ON,
pressing the sound key will
alternate between sound-on and
sound-off, it will also change
the sound sign on the LCD
screen.
Coarse/Fine detecting
With the detector on, pressing
the coarse/fine detecting key
will alternate the unit between
coarse and fine mode. The
detector has a different symbol
and accuracy specifications.
Backlight function
When the detector is on, pressing the backlight key will turn on and
off the LCD backlight.
©2009 Johnson Level & Tool 7
close closer on grade
Sound No Sound
Coarse Fine
2408H 7/22/09 8:12 AM Page 7