12 | English
1 609 92A 43E | (31.7.17) Bosch Power Tools
In case of ground vibrations or position changes during oper-
ation, the measuring tool is automatically levelled in again. To
avoid errors, check the position of the horizontal and vertical
laser line with regard to the reference points upon re-level-
ling.
Working without Automatic Levelling
For work without automatic levelling, slide the on/off switch
15 to the “On” position. When automatic levelling is
switched off, the indicator 3 lights up red and the laser lines
continuously flash slowly.
When automatic levelling is switched off, you can hold the
measuring tool freely in your hand or place it on an inclined
surface. The laser lines no longer necessarily run perpendicu-
lar to each other.
Remote control via the “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 “Levelling Remote App” application (app) is needed to
use this function. You can download this in the app store for
your terminal device (Apple App Store, Google Play Store).
For information on the necessary system requirements for a
Bluetooth
® connection, please refer to the Bosch website at
www.bosch-pt.com
When remote controlling by means of Bluetooth®, time lags
may occur between mobile terminal/device and measuring
tool as a result of poor reception conditions.
Switching On Bluetooth®
To switch on Bluetooth
® for the remote control, press the
Bluetooth
®-button 8. Ensure that the Bluetooth® interface is
activated on your mobile terminal/device.
After starting the Bosch application, the connection between
the mobile terminal/device and the measuring tool is estab-
lished. When several active measuring tools are found, select
the appropriate measuring tool. When only one active mea-
suring tool is found, the connection is automatically estab-
lished.
The connection is established as soon as the Bluetooth® indi-
cator 7 lights up.
The Bluetooth
® connection may be interrupted if there is too
much distance or there are obstacles between measuring tool
and mobile terminal/device and if there are any electromag-
netic interference sources. In this case, the Bluetooth® indica-
tor flashes.
Switching Off Bluetooth
®
To switch off Bluetooth® for the remote control, press the
Bluetooth
®-button 8 or switch off the measuring tool.
Accuracy Check of the Measuring Tool
Influences on Accuracy
The ambient temperature has the greatest influence. Espe-
cially temperature differences occurring from the ground
upward can divert the laser beam.
Because the largest difference in temperature layers is close
to the ground, the measuring tool should always be mounted
on a tripod when measuring distances exceeding 20 m. If pos-
sible, also set up the measuring tool in the centre of the work
area.
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 be-
ginning work.
Firstly, check the levelling accuracy of the horizontal laser line
and 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
Lateral Axis
For this check, a free measuring distance of 5 m on a firm
surface between two walls A and B is required.
– Mount the measuring tool onto a tripod, or place it on a firm
and level surface close to wall A. Switch on the measuring
tool to operation with automatic levelling. Select the oper-
ating mode in which a horizontal laser plane as well as a
vertical laser plane in front of the measuring tool are gener-
ated.
– Direct the laser against the close wall A and allow the meas-
uring tool to level in. Mark the centre of the point where the
laser lines cross each other at wall A (point I).
– Turn the measuring tool by 180°, allow it to level in and
mark the cross point of the laser lines on the opposite wall
B (point II).
– Without turning the measuring tool, position it close to
wall B. Switch the measuring tool on and allow it to level in.
A
B
5 m
A
B
180°
OBJ_BUCH-3304-001.book Page 12 Monday, July 31, 2017 1:09 PM
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