Bosch Professional GRL 350 HV Instructions Manual page 15

from the wall on the tripod (39) (recommended) or position
it on a firm, level surface.
30 m
Align the measuring tool so that the X-axis indicator imprin-
ted on the measuring tool is at right angles to the wall.
Starting calibration:
The measuring tool must be switched off when calibration
starts.
Press and hold the manual operation button (14) on the
measuring tool and then also briefly press the on/off
button (3). Release the manual operation button only when
the X‑axis status indicator (7) flashes green and the shock-
warning function indicator (13) flashes red (both at 2×/s).
The measuring tool is switched on in calibration mode for the
X‑axis.
X-axis calibration:
Ensure that the measuring tool is aligned with the X‑axis at
right angles to the wall. Wait until the measuring tool is lev-
elled in and rotational operation has started.
X1
Mark the height of the laser beam on the wall as height X1.
To do this, you may need to use the laser receiver (37).
Turn the measuring tool through 180° without adjusting the
height and position of the measuring tool.
Wait until the measuring tool is levelled in and rotational op-
eration has started.
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X1
X2
Mark the height of the laser beam on the wall as height X2.
To do this, you may need to use the laser receiver (37). Note
that height X2 should preferably be positioned vertically
above or below height X1.
X1
X3
X2
Determine the exact centre point between the marked
heights X1 and X2 and mark this on the wall as height X3.
Align the variable laser beam (8) using the down (5) and
up (15) slope buttons so that it hits height X3 as accurately
as possible. To do this, you may need to use the laser
receiver (37).
Save the calibration of the X-axis by pressing the manual op-
eration button (14). As confirmation, the X-axis status
indicator (7) will flash green six times.
Y-axis calibration:
After calibration of the X‑axis, the measuring tool automatic-
ally switches to calibration mode for the Y‑axis. The Y‑axis
status indicator (6) flashes green and the shock-warning
function indicator (13) flashes red (both at 2×/s).
Turn the measuring tool through 90° so that the Y-axis indic-
ator imprinted on the measuring tool is at right angles to the
wall. Then calibrate as described for the X‑axis.
If the calibration of the Y-axis has been saved, the Y‑axis
status indicator (6) will flash green six times. Calibration
mode will be ended automatically.
Z-axis Calibration
A free measuring distance on firm ground in front of a 10 m
wall is required for the calibration. Fix a plumb line to the
wall.
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