Bosch BL 200 GC Professional - Manual (Page 29)

English | 29
Bosch Power Tools 1 609 929 L80 | (26.7.07)
Position Changes
When the measuring tool is levelled in, it contin-
uously checks the horizontal and vertical posi-
tion. Position changes of the measuring tool
lead to the following reactions:
Minor Position Changes
Minor position changes are compensated within
5 seconds. The selected operating mode is not
interrupted. During the re-levelling, the “auto”
indicator 26 flashes twice every second. This au-
tomatically compensates ground vibrations at
the construction site or weather influences.
Major Positon Changes
When the measuring tool cannot carry out the
levelling-in procedure within 5 seconds, the ro-
tor is stopped, the laser beam and the “auto” in-
dicator 26 flash twice per second to avoid faulty
measurements during the levelling process.
Out-of-level Safety
The measuring tool has an out-of-level safety
feature. It precludes levelling in after height
changes exceeding 3 mm/m and thus prevents
vertical errors. The out-of-level safety is
switched on automatically 30 seconds after a
pushbutton is pressed or after a levelling proce-
dure. When the out-of-level safety is activated,
the “auto” indicator 26 flashes once every 4 sec-
onds.
After a position change, the measuring tool first
attempts to compensate the change. When the
limit value 3 mm/m is exceeded upon re-level-
ling, a fast-sequence warning signal sounds, the
laser switches off and the “man” indicator 25
flashes twice every second. In this case, switch
the measuring tool off and then on again. Then,
check and correct the height of the laser beam.
Working without Automatic Levelling
In order to operate the measuring tool in any in-
clined position (see “Contouring Gradients”),
the automatic levelling can be switched off for
the X- and Y-axis.
f
Position changes of the measuring tool are
not detected when the automatic levelling
is switched off.
Switching Off the Automatic Levelling in the
Horizontal Position/Inclined Operation in a
Single Axis
When the measuring tool is in the horizontal po-
sition, the automatic levelling for both axes is
switched off by pressing the “man/auto” push-
button 28 once. The “man” indicator 25 flashes
once per second.
Repeated pressing of the “man/auto” pushbut-
ton 28 switches on the inclined operation in a
single axis. In inclined operation in a single axis,
the X-axis is levelled in automatically, but the Y-
axis is not. The “man” 25 and “auto” 26 indica-
tors flash once per second.
When pressing the “man/auto” pushbutton 28 a
third time, the automatic levelling is switched
on again for both axes. The “auto” indicator 26
flashes (as long as the measuring tool is re-lev-
elling) or lights up continuously (when the
measuring tool is levelled in).
Switching Off the Automatic Levelling in the
Vertical Position
When the measuring tool is in the vertical posi-
tion, the automatic levelling for both axes is
switched off by pressing the “man/auto” push-
button 28 once. The “man” indicator 25 flashes
once per second.
Repeated pressing of the “man/auto” pushbut-
ton 28 switches the automatic levelling on
again. The “auto” indicator 26 flashes (as long
as the measuring tool is re-levelling) or lights up
continuously (when the measuring tool is lev-
elled in).
OBJ_BUCH-78-004.book Page 29 Thursday, July 26, 2007 2:04 PM