Automatic Levelling - Bosch PCL 20 Manual Original

14 | English
Operating Modes (see figures A – E)
After switching on, the measuring tool is in cross-
line operating mode with automatic levelling.
To change the operating mode, press the
"Mode" button 6 until the requested operating
mode is indicated by the corresponding illumi-
nated operating-mode indication 5.
The following operating modes are available:
Indica- Operating Mode
tion
Cross-line operation with automatic
levelling (see figure A): The measur-
(green) ing tool generates both a horizontal
and a vertical laser line; their level-
ling is monitored.
Horizontal operation with automat-
ic levelling (see figure B): The meas-
(green) uring tool generates a horizontal
laser line; its levelling is monitored.
Vertical operation with automatic
levelling (see figure C): The measur-
(green) ing tool generates a vertical laser
line; its levelling is monitored.
Plumb beam with automatic level-
ling (see figure D): The measuring
(green) tool generates two plumb beams
running vertically upward and down-
ward; their levelling is monitored.
Cross-line operation without auto-
matic levelling (see figure E): The
measuring tool generates two
crossed laser lines that can be
(red/ aligned as requested, and must not
green) run vertical to each other.
1 609 929 R07 | (9.10.08)

Automatic Levelling

Working with Automatic Levelling
(see figure F – G)
Position the measuring tool on a level and firm
support, attach it to the wall mount 13 or to a
tripod 12.
Select one of the operating modes with automatic
levelling.
After switching on, the levelling function auto-
matically compensates irregularities within the
self-levelling range of ± 4°. The levelling is fin-
ished as soon as the laser lines or plumb beams
do not move any more. The indication 5 of the
current operating mode lights up green.
If the automatic levelling function is not possible,
e.g. because the surface on which the measuring
tool stands deviates by more than 4° from the
horizontal plane, the automatic levelling indica-
tor 4 lights up red and the laser is automatically
switched off. In this case, bring the measuring
tool to the level position and wait for the self-lev-
elling to take place. As soon as the measuring
tool is within the self-levelling range of ± 4° again,
the operating-mode indication 5 lights up green
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 automat-
ically levelled in again. To avoid errors, check the
position of the laser lines or plumb beams with
regard to the reference points upon re-levelling.
Working without Automatic Levelling
When automatic levelling is switched off, you can
hold the measuring tool freely in your hand or
place it on an inclinded surface. The two laser
lines no longer necessarily run vertical to each
other.
Bosch Power Tools