Bosch 3 603 F53 4 Series Originalbetriebsanleitung Seite 28

OBJ_BUCH-2030-004.book Page 28 Monday, September 14, 2015 11:19 AM
28 | English
After switching on, the automatic levelling function automatically com-
pensates irregularities within the self-levelling range of±4 °. The levelling
is finished as soon as the laser lines do not move anymore. The operating
mode appears in the display.
If the automatic levelling function is not possible, e. g. because the sur-
face on which the measuring tool stands deviates by more than 4 ° from
the horizontal plane, the display 4 flashes and the laser is switched off au-
tomatically (see figure F). If this is the case, set up the measuring tool in a
level position and wait for the self-levelling to take place. As soon as the
measuring tool is once again within the self-levelling range of ±4 °, the op-
erating mode appears in the display 4 and the laser is switched on.
When not within the self-levelling range of ±4°, working with automatic
levelling is not possible, because it cannot be assured that the laser lines
run at a right angle to each other.
In case of ground vibrations or position changes during operation, the
measuring tool is automatically levelled again. Upon re-levelling, check
the position of the laser lines with regard to the reference points to avoid
errors.
Tilt function with angle indicator
In this operation mode, the measuring tool generates a horizontal or two
crossed laser lines, which can be freely aligned. The tilt angle is shown in
the display.
Align with target plate (see figure G)
The measuring tool must be calibrated with the target plate in order to en-
sure conformity of the tilt angle shown in the display with the projected la-
ser line on the wall. Place the target plate on the wall. Select the cross-line
mode or the vertical mode of the automatic levelling operation mode.
Ensure that the laser line passes through the upper and lower red mark on
the target plate. Select a mode of the tilt function with angle indicator
operation mode and project the laser line in the desired angle on the wall.
When doing so, do not tilt the measuring tool more than 10 ° forwards (in
the direction of the laser) or backwards (in the direction of the display).
Otherwise the measuring accuracy may deteriorate.
Digital spirit level
The measuring tool checks horizontal or vertical like a spirit level. Laser
lines are not projected.
1 609 92A 13M | (14.9.15) Bosch Power Tools