Johnson 40-6557 Mode D'emploi page 22

8489H-All_Manuals 11/18/14 11:50 AM Page 22
Detecting Laser Level Signals
While detecting laser signals, the LCD will display as follows: (take
the set-up state of high sound and fine detection as an example)
Laser signal
The laser signal is down
Sound: rapid short beeps
When the laser signal is near the on-grade mark, the displayed up
and down arrows will decrease as the distance to the on-grade
mark decreases.
Laser signal
1. 1. When detecting a horizontal laser signal, it is
important to have the horizontal bubble vial
centered, as the deflection of the receiver will
influence its receiving accuracy.
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Laser signal
The laser signal is up Horizontal bar indicated on-grade
Sound: slow short beeps Sound: continuous sound
Laser signal
Laser signal
No laser signal is detected
Sound: no sound
Laser signal Laser signal
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