Johnson Level & Tool Mfg. 40-6780 User Manual

Page 4

mark. An up arrow plus a yellow lit light indicates the laser signal is
above the detectors on grade mark. A middle sign plus a lit green light
indicates the laser signal is on grade.

Note: When the laser signal moves towards the
center position, the displayed up or down
arrows will decrease in size, until the center
single line appears.

C. Detecting the vertical laser signal: Put the

detector in a horizontal position (center the bubble
in the horizontal vial) with the reception window
and indicator lights facing up. Have the reception
window face the unit to receive the vertical laser
signal. Left arrow shown on LCD plus a lit red light
indicates the laser signal is on the left side of center.
A middle sign with a lit green light indicates the
laser signal is on the middle position. A right arrow plus a lit
yellow light indicates the laser signal is on the right side of center.

D. Press the Power on/off key to power off the detector. The

detector will beep twice for off.

3. Sound Function
Pressing the sound key when the unit
is powered-on. This will switch the
unit between sound on and sound off,
note the sound sign indication on LCD.

Sound
On

Sound
Off

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