Bosch GRL900-20HV Operating/Safety Instructions Manual page 24

Protect the laser receiver against moisture.
Do not subject the laser receiver to extreme
temperatures or variations in temperature.
As an example, do not leave it in vehicles for
longer periods. In case of large variations in
temperature, allow the laser receiver to adjust
to the ambient temperature before putting it
into operation. In case of extreme tempera-
tures or variations in temperature, the accu-
racy of the laser receiver can be impaired.
the laser beam directly into the eyes of others.
Serious eye injury could result.
Setting Up the Laser Receiver
Position the laser receiver at least 3ft (1m)
away from the laser tool. Switch on the laser
tool, and select horizontal or vertical opera-
tion.
Position the laser receiver in such a manner
that the laser beam can reach the reception
area 6a. Align the laser receiver in such a
manner that the laser beam runs horizontally
through the reception area (as shown in the
figure).
A loud audio signal sounds when switch-
ing on the laser receiver. Therefore, keep the
laser receiver away from your ear or other
people when switching on. The loud audio
signal can cause hearing defects.
To switch the laser receiver on, press the On/
Off button 2a. All LEDs light up briefly and an
audio signal sounds.
To switch the laser receiver off, press the On/
Off button 2a again. Before switching off, all
LEDs briefly light up.
When no button is pressed on the laser re-
ceiver for approx. 6 minutes and when no la-
ser beam reaches the reception area 6a for
6 minutes, the laser receiver automatically
switches off in order to save the battery. The
switching off is indicated by brief lighting up
of all LEDs.
1.800.561.8187
LR30 Operation
Initial Operation
DO NOT stare directly at
the laser beam or project
(see figure G)
Switching On and Off
www.
Selecting the Setting of the
Center Indicator
With button 1a, you can specify with which
accuracy the position of the laser beam is in-
dicated on the reception area:
– "Fine" adjustment
– "Coarse" adjustment
Whenever switching on the laser receiver the
accuracy level "Fine" is set.
Direction Indicators
The position of the laser beam on the recep-
tion area 6a is indicated:
– via the LEDs "move downward" 8a, "move
upward" 10a or the center-indication LED
9a, or corresponding LED 4a on the back
of the tool,
– optionally via the audio signal (see "Audio
Signal for Indication of the Laser Beam").
Tool too low: When the laser beam runs
through the top half of the reception area 6a,
the corresponding direction LED 10a lights
up. When the audio signal is switched on, a
low frequency signal sounds. Move the tool
upward in the direction of the arrow.
Tool too high: When the laser beam runs
through the bottom half of the reception area
6a, the corresponding direction LED 8a lights
up. When the audio signal is switched on, a
high frequency signal sounds. Move the tool
downward in the direction of the arrow.
Tool in center position: When the laser beam
runs through the reception area 6a at the cen-
ter mark 7a, the corresponding center-indica-
tion LED 9a lights up. When the audio signal
is switched on, a continuous signal sounds.
Audio Signal for Indication
of the Laser Beam
The position of the laser beam on the recep-
tion area 6a can be indicated via an audio
signal.
After the laser receiver has been switched
on, the volume level can be switched off.
To switch off the audio signal, push the audio
signal button 3a.
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