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Check whether the laser level and
laser receiver are aligned with
each other, as illustrated on the
display (the “+” side of the X-axis
is aligned to the laser receiver). Start the cali-
bration of the X-axis with by pressing the
slope button (14).
If this step appears on the display,
rotate the laser level 180° so that
the “–” side of the X-axis is aligned
to the laser receiver. For each ro-
tation, take care not to change the height and
position of the laser level. Confirm the rota-
tion with by pressing the slope button
(14).
Calibration of the X-axis continues.
The indicator opposite will appear
if both sides of the X-axis have
been successfully calibrated.
Continue the calibration with
by pressing the slope button (14).
To calibrate the Y-axis, rotate the
laser level 90° in the direction of
the arrow so that the “+” side of
the Y-axis is directed at the laser
receiver. Confirm the rotation with by
pressing the slope button (14).
If this step appears on the display,
rotate the laser level 180° so that
the “–” side of the Y-axis is aligned
to the laser receiver. Confirm the
rotation with by pressing the slope button
(14). Calibration of the Y-axis continues.
This symbol will appear on the la-
ser level display if the Y-axis has
been successfully calibrated.
Finish the calibration of the Y-axis
with by pressing the slope button (14).
This symbol confirms that the X-
axis and the Y-axis have been suc-
cessfully calibrated with the level-
ing accuracy selected at the
beginning. End the calibration with by
pressing the slope button (14).
If the calibration has been completed suc-
cessfully, the laser level then automatically
switches itself off.
The relevant error message
will appear in the laser lev-
el display if calibration of
the X-axis or the Y-axis has
failed. “ERR” will appear on the display of the
laser receiver.
Cancel the calibration with by pressing
the button for line operation (5). Make sure
that the laser level and the laser receiver are
aligned correctly (see description above). Re-
start the calibration. If calibration fails again,
have the laser level checked by a Bosch cus-
tomer service agent.
Z-axis calibration
A free measuring distance on firm ground in
front of a 30 ft (10 m) wall is required for the
calibration. Fix a plumb line to the wall.
30 ft (10 m)
Position the laser level on a firm, level surface.
Switch the laser level on and allow it to level
in. Align the laser level so that the laser beam
is perpendicular to the wall and cuts through
the plumb line. Switch the laser level off.
To start calibration mode, press and hold the
slope button (14) and then also briefly press the
on/off button (11). The laser level is switched on.
Allow the laser level to level in.
Align the laser beam so that it
runs as parallel as possible to the
plumb line. Tilt the laser beam in
the ◀ direction by pressing the ▲
button (4). Tilt the laser beam in the ▶ direc-
tion by pressing the ▼ button (3).
If it is not possible to align the laser beam in
parallel to the plumb line, align the laser level
to the wall more precisely and start the cali-
bration process again.
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