Johnson Level & Tool Mfg. 40-6790 - Manual (Page 6)

6 ©2009 Johnson Level & Tool
Operating Instructions
IMPORTANT: Hold the unit stable while detecting.
Press the Power Key: The LCD will display
all the symbols then enter into detection
mode. (See figure 3) The LCD display will
show the ON symbol and the Coarse/Fine
symbol. (See figure 4)
Detecting a horizontal laser signal
Put the unit vertically, with the receiving window facing the laser to
receive the laser signal. If the LCD shows a down arrow, the down
LED is flashing, and there is short beeps, it means the laser signal is
down. (See figure 5) If the LCD shows an up arrow, the up LED is
flashing and there is rapid beeps, it means the laser signal is up.
(See figure 6) If the LCD shows the on grade symbol, the middle
green LED is flashing and there is a continuous sound, it means the
detector is on the same grade/plane as the laser beam. (See figure
7-1 coarse detecting and figure 7-2 fine detecting)
Figure 3 Figure 4
Figure 5 Figure 6 Figure 7-1 Figure 7-2
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