Bosch 250 HV Originalbetriebsanleitung Seite 30

30 | English
Turning the Rotational Plane when in the
Vertical Position
When the measuring tool is in the vertical posi-
tion, it is possible to rotate the laser point, laser
line or rotational plane around the vertical axis
with help of the remote control 25. For this, ob-
serve the operating instructions of the remote
control.
Automatic Levelling of the Rotational
Laser Level
Overview
After switching on, the measuring tool automat-
ically detects the horizontal or vertical position.
To change between the horizontal and vertical
position, switch the measuring tool off, reposi-
tion it and switch on again.
After switching on, the measuring tool checks
the horizontal and vertical position and auto-
matically levels out any unevenness within the
self-levelling range of approx. 8 % (5°).
When the measuring tool is inclined by more
than 8 % after switching on or after a position
change, levelling in is no longer possible. In this
case, the rotor is stopped, the laser flashes and
levelling indicator 3 continuously lights up red.
Reposition the measuring tool and wait for it to
re-level. Without repositioning, the laser is auto-
matically switched off after 2 minutes and the
measuring tool after 2 hours.
When the measuring tool is levelled in, it continu-
ously checks the horizontal and vertical position.
Automatic re-levelling takes place after position
changes. To avoid faulty measurements, the rotor
stops during the levelling process, the laser flash-
es and the levelling indicator 3 flashes green.
Shock-warning Function
The measuring tool has a shock-warning function;
after position changes or shock to the measuring
tool, or in case of ground vibrations, it keeps the
measuring tool from levelling in at changed
heights, and thus prevents vertical errors.
To switch on the shock-warning function, press
the shock-warning button 2. The shock-warning
indicator 1 continuously lights up green, and the
shock-warning function is activated after 30 sec-
onds.
2 610 A12 916 | (4.3.10)
When the levelling-accuracy range is exceeded
after a position change of the measuring tool or
when heavy ground vibrations are detected, the
shock-warning function is actuated: The rota-
tion is stopped, the laser flashes, the levelling
indicator 3 goes out and the shock-warning indi-
cator 1 flashes red. The current operating mode
is stored.
After the shock-warning function has actuated,
press the shock-warning button 2. The shock-
warning function is restarted and the measuring
tool starts the levelling. As soon as the measur-
ing tool is levelled in (levelling indicator 3 con-
tinuously lights up green), it starts in the stored
operating mode. Now, check the height of the la-
ser beam with a reference point and correct the
height, if required.
When the function is not restarted by pressing
button 2 after the shock-warning function has
actuated, the laser is automatically switched off
after 2 minutes and the measuring tool after 2
hours.
To switch off the shock-warning function, press
shock-warning button 2 once, or, when the
shock warning is actuated (shock-warning indi-
cator 1 flashing red) press it twice. When the
shock-warning function is shut off, the shock-
warning indicator 1 goes out.
Levelling Accuracy of the Rotational
Laser Level
Influences on Accuracy
The ambient temperature has the greatest influ-
ence. Especially temperature differences occur-
ring from the ground upward can divert the laser
beam.
The deviations play a role in excess of approx.
20 m measuring distance and can easily reach
two to four times the deviation at 100 m.
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 possi-
ble, also set up the measuring tool in the centre
of the work area.
Bosch Power Tools