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39
The surfaces used for
the calibration were
not accurately aligned
(horizontal or vertical).
Repeat the calibration on a
horizontal or vertical surface;
if required, check the surface
first with a level.
The measuring tool was
moved or tilted while pressing
the button.
Repeat the calibration and
hold the measuring tool in
place while pressing the
button.
Bluetooth
®
cannot be activated
The battery is too low. Change the measuring tool’s
battery.
No Bluetooth
®
connection
Failure of the Bluetooth
®
connection
Switch off and restart
Bluetooth
®
on the measuring
tool and the mobile device.
Check the application on
your mobile terminal/device.
Check if Bluetooth
®
is
activated on your measuring
tool and mobile terminal/
device.
Check your mobile terminal/
device for overload.
Reduce the distance
between measuring tool and
your mobile terminal/device.
Avoid obstructions (e.g.,
reinforced concrete, metal
doors) between measuring
tool and your mobile
terminal/device. Observe
clearance to electromagnetic
disturbances (e.g., WLAN
transmitters).
2610049010 04-18 GLM400C.indd 39 4/6/18 8:20 AM
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