Starting Operation Of The Laser Receiver - Bosch GRL 400 H Professional Manual Original

OBJ_BUCH-1179-006.book Page 20 Wednesday, February 1, 2017 10:13 AM
20 | English
When inserting the battery, pay attention to the correct polar-
ity according to the representation on the inside of the battery
compartment.
When the battery low indicator b appears for the first time on
the display 25, the laser receiver can still be operated for ap-
prox. 3 h.
 Remove the battery from the laser receiver when not
using it for longer periods. When storing for longer peri-
ods, the battery can corrode and self-discharge.
Operation
Starting Operation of the Rotational Laser Level
 Protect the measuring tool against moisture and direct
sun light.
 Do not subject the measuring tool to extreme tempera-
tures or variations in temperature. As an example, do
not leave it in vehicles for a long time. In case of large vari-
ations in temperature, allow the measuring tool to adjust to
the ambient temperature before putting it into operation.
In case of extreme temperatures or variations in tempera-
ture, the accuracy of the measuring tool can be impaired.
 Avoid heavy impact to or dropping down of the measur-
ing tool. After severe exterior effects to the measuring
tool, it is recommended to carry out an accuracy check
(see "Levelling Accuracy of the Rotational Laser Level",
page 22) each time before continuing to work.
 Switch the measuring tool off before transporting it.
This will save energy and prevent laser beams from being
emitted accidentally.
Setting Up the Measuring Tool
Position the measuring tool on a firm sur-
face or mount it to a tripod 30.
Due to the high levelling accuracy, the
measuring tool reacts sensitively to ground
vibrations and position changes. Therefore,
pay attention that the position of the meas-
uring tool is stable in order to avoid opera-
tional interruptions due to re-levelling.
Switching On and Off
 Do not direct the laser beam at persons or animals (es-
pecially not at their eye level), and do not stare into the
laser beam yourself (not even from a distance.) Imme-
diately after switching on, the measuring tool sends out the
variable laser beam 4.
– For switching on the measuring tool, briefly press the
On/Off button 2. The indicators 3, 1 and 6 light up briefly.
The measuring tool immediately starts the automatic level-
ling. During the levelling, the levelling indicator 1 flashes
green, the laser does not rotate and flashes.
The measuring tool is levelled in as soon as levelling indicator
1 lights up green continuously and the laser beam is steady.
After the levelling is completed, the measuring tool automati-
cally starts in rotational operation.
1 609 92A 1XU | (1.2.17)
The measuring tool exclusively operates with fixed rotational
speed in rotational operation, which is also suitable for use of
a laser receiver.
When factory set, the shock-warning function is automatically
switched on, and the shock-warning indicator 3 lights up
green.
– To switch off the measuring tool, briefly press the On/Off
button 2. When the shock warning has actuated (shock-
warning indicator 3 flashes red), briefly press the On/Off
button once to restart the shock-warning function, and
then again to switch off the measuring tool.
 Do not leave the switched-on measuring tool unattend-
ed and switch the measuring tool off after use. Other
persons could be blinded by the laser beam.
To save the batteries, the measuring tool is automatically
switched off when not within the self-levelling range for more
than 2 h or when the shock warning is actuated for more than
2 h (see "Automatic Levelling of the Rotational Laser Level",
page 21). Reposition the measuring tool and switch it on
again.

Starting Operation of the Laser Receiver

 Protect the laser receiver against moisture and direct
sun light.
 Do not subject the laser receiver to extreme tempera-
tures 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 opera-
tion. In case of extreme temperatures or variations in tem-
perature, the accuracy of the laser receiver can be im-
paired.
– Position the laser receiver at least 50 cm away from the ro-
tational laser level. Position the laser receiver in such a
manner that the laser beam can reach the reception area
24.
To save energy, only switch the laser receiver on when you are
using it.
Switching On and Off
 A loud audio signal sounds when switching on the laser
receiver. "The A-weighted sound pressure level of the au-
dio signal is up to 95 dB(A) at a distance of 0.2 m."
 Do not hold the laser receiver close to your ear! The
loud audio signal can cause hearing defects.
– To switch on the laser receiver, press the On/Off button
19. Two audio signals sound and all display indicators light
up briefly.
– To switch off the laser receiver, press the On/Off button
19 again.
When no button is pressed on the laser receiver for approx.
10 minutes and when no laser beam reaches the reception ar-
ea 24 for 10 minutes, the laser receiver automatically switch-
es off in order to save the battery. The switching off is indicat-
ed by an audio signal.
Bosch Power Tools