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21
Bosch Power Tools
1 609 92A 3PX | (2.6.17)
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
9
. 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
8
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
9
or switch off the measuring tool.
CAL guard calibration warning
The CAL guard calibration warning sensors monitor the status
of the measuring tool, even when it is switched off. If the
measuring tool is not being supplied with power by a battery
pack or batteries, an internal energy storage battery provides
continuous monitoring by the sensors for 72 hours.
The sensors are activated when the measuring tool is started
up for the first time.
Calibration warning triggers
If one of the following events occurs, the CAL guard calibra-
tion warning is triggered and the indicator
3
lights up red:
– The calibration interval (every 12 months) has expired.
– The measuring tool was stored outside of the storage tem-
perature range.
– The measuring tool suffered a severe shock (e.g. impact on
the floor after a fall).
You can refer to the “Levelling Remote App” to see which of
the three events triggered the calibration warning. Without
the app, the cause cannot be identified as the CAL guard indi-
cator, the CAL guard indicator
3
lighting up indicates merely
that the levelling accuracy needs to be checked.
Once the warning has been triggered, the CAL guard indicator
3
lights up until the levelling accuracy has been checked and
the indicator switched off.
Procedure in the event of a calibration warning being
triggered
Check the levelling accuracy of the measuring tool (see “Accu-
racy Check of the Measuring Tool”, page 21).
If the maximum deviation has not been exceeded in any of the
tests, switch the CAL guard indicator
3
off. To do so, press
and hold the receiver mode button
5
and the
Bluetooth
® but-
ton
9
at the same time for at least 3 s. The CAL guard indicator
3
goes out.
Should the measuring tool exceed the maximum deviation
during one of the tests, please have it repaired by a Bosch af-
ter-sales service.
Accuracy Check of the Measuring Tool
Influences on Accuracy
The ambient temperature has the greatest influence. Espe-
cially temperature differences occurring from the ground up-
ward 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 af-
ter-sales service.
Checking the Horizontal Levelling Accuracy of the
Lateral Axis
For this check, a free measuring distance of 5 m on a firm sur-
face 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.
A
B
5 m
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