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| English
If automatic levelling is not possible, e.g. because the sur-
face on which the measuring tool stands deviates by more
than
4
° from the horizontal plane, the laser lines will begin to
flash quickly. If the signal tone function is activated, rapid
signal tones will sound.
Place the measuring tool in a horizontal position and wait for
self-levelling to take place. As soon as the measuring tool is
within the self-levelling range of ±
4
°, the laser beams will
light up continuously and the signal tones will cease.
In case of ground vibrations or position changes during oper-
ation, the measuring tool is automatically levelled again.
Upon re-levelling, check the position of the horizontal or ver-
tical laser line with regard to the reference points to avoid er-
rors by moving the measuring tool.
Working with the Pendulum Lock
For work with the pendulum lock, slide the on/off
switch
(15)
to the "
On
" position. The pendulum lock indic-
ator
(3)
lights up red and the laser lines continuously flash
slowly.
For work with the pendulum lock, the automatic levelling is
switched off. You can hold the measuring tool freely in your
hand or place it on a sloping surface. This means that the
laser lines are no longer levelled and no longer necessarily
run perpendicular to one another.
Remote control via the Bosch Levelling Remote
App
The measuring tool is equipped with a
Bluetooth®
module
which uses radio technology to enable remote control via a
smartphone with a
Bluetooth®
interface.
The
Bosch Levelling Remote App
application (app) is re-
quired to use this function. You can download this in the app
store for your terminal device (Apple App Store, Google Play
Store).
Information about the system requirements for a
Bluetooth®
connection can be found on the Bosch website at
www.bosch‑pt.com
When remote controlling via
Bluetooth®
, poor reception con-
ditions can cause time delays between the mobile terminal
device and the measuring tool.
Switching on Bluetooth®
To switch on
Bluetooth®
, press the
Bluetooth®
button
(8)
.
Ensure that the
Bluetooth®
interface is activated on your mo-
bile terminal device.
The connection between mobile end device and measuring
tool is established after the Bosch application has started. If
multiple active measuring tools are found, select the appro-
priate measuring tool. A connection will be established auto-
matically if only one active measuring tool is found.
The connection is established as soon as the
Bluetooth®
in-
dicator
(7)
lights up.
The
Bluetooth
® connection may be interrupted if the dis-
tance between the measuring tool and the mobile terminal
device is too great or is blocked, and if there are any sources
of electromagnetic interference. Should this occur, the
Bluetooth
® indicator
(7)
will flash.
Switching off Bluetooth®
To switch off
Bluetooth®
for remote control, press the
Bluetooth®
button
(8)
or switch off the measuring tool.
Accuracy Check of the Measuring Tool
Influences on Accuracy
The largest influence is exerted by the ambient temperature.
In particular, temperature differences that occur from the
ground upwards can refract the laser beam.
Since the temperature stratification is greatest at ground
level, you should always mount the measuring tool on a tri-
pod for measuring distances of 20 m or more. In addition,
position the measuring tool in the centre of the work surface,
wherever this is possible.
In addition to external influences, device-specific influences
(e.g. falls or heavy impacts) can also lead to deviations. For
this reason, check the levelling accuracy each time before
beginning work.
First check the levelling accuracy of the horizontal laser line,
then the levelling accuracy of the vertical laser lines.
Should the measuring tool exceed the maximum deviation
during one of the tests, please have it repaired by a
Bosch
after-sales service.
Checking the Horizontal Levelling Accuracy of the
Transverse Axis
For this check, you will need a free measuring distance of
5
m on firm ground between two walls (designated A and B).
– Mount the measuring tool close to wall A on a tripod, or
place it on a firm, flat surface. Switch on the measuring
tool in the mode with automatic levelling. Select the oper-
ating mode for generating a horizontal laser plane and a
vertical laser plane directly in front of the measuring tool.
A
B
5 m
– Aim the laser at the closer wall A and allow the measuring
tool to level in. Mark the middle of the point at which the
laser lines cross on the wall (point I).
1 609 92A 5DN | (26.03.2020)
Bosch Power Tools
