Automatic Levelling; Working Advice - Bosch PCL 20 Originalbetriebsanleitung

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The following operating modes are available:
Indica- Operating Mode
tion
Cross-line operation with automatic levelling
(see figure A): The measuring tool generates
(green) both a horizontal and a vertical laser line; their
levelling is monitored.
Horizontal operation with automatic levelling
(see figure B): The measuring tool generates a
(green) horizontal laser line; its levelling is monitored.
Vertical operation with automatic levelling
(see figure C): The measuring tool generates a
(green) vertical laser line; its levelling is monitored.
Plumb beam with automatic levelling
(see figure D): The measuring tool generates two
(green) plumb beams running vertically upward and
downward; their levelling is monitored.
Cross-line operation without automatic level-
ling (see figure E): The measuring tool generates
two crossed laser lines that can be aligned as re-
quested, and must not run vertical to each other.
(red/
green)

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 automatically com-
pensates irregularities within the self-levelling range of ±4°.
The levelling is finished 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. be-
cause the surface on which the measuring tool stands devi-
ates by more than 4° from the horizontal plane, the automatic
levelling indicator 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-levelling 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 as-
sured that the laser lines run at a right angle to each other.
In case of ground vibrations or position changes during oper-
ation, the measuring tool is automatically 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

Working Advice

Working with the Tripod (see figure H)
A tripod 12 offers a stable, height-adjustable measuring sup-
port. Place the measuring tool via the tripod mount 8 onto the
1/4" male thread of the tripod and screw the locking screw of
the tripod tight.
Working with the Wall Mount (Accessory)
With the wall mount 13, the measuring tool can be securly at-
tached at any height.
Mounting the wall mount (see figure I): For fastening to a
wall, the holding plate 15 must be folded out. Press pushbut-
tons 14 on both sides of the holding plate (a), fold the holding
plate up (b), lightly push it downward and allow it to latch (c).
For height adjustment of the measuring tool, the holding plate
15 can be moved up or down within a range of 6 cm. For this,
press the pushbuttons 14 on both sides of the holding plate,
slide the holding plate to the requested height and allow it to
latch again. The scale on the side of the wall mount aids the
height adjustment.
Fastening the wall mount (see figure J): Fasten the wall
mount 13 as vertical as possible to a wall with the holding
plate 15 folded up. Secure it safely against slipping off, e.g.,
with two fastening screws 16 (commercially available).
Screw the 1/4" screw 17 of the wall mount into the tripod
mount 8 of the measuring tool.
Using as a table stand (see figure K): In the plumb beam op-
erating mode, the visibility of the bottom plumb beam 3 can
be improved by not placing the measuring tool directly on a
surface, but by inserting it in the folded together wall mount
13.
For this, place the wall mount as horizontal as possible onto a
firm and level support. Press pushbuttons 14 at the holding
plate 15 (a). Slide the holding plate to the stop against the up-
per end of the wall mount (b). Fold the holding plate down-
ward (c). Screw the 1/4" screw 17 of the wall mount into the
tripod mount 8 of the measuring tool. Then, allow the holding
plate to latch in the wall mount.
Turn the mounted measuring tool in such a manner that the
bottom plumb beam 3 faces downward. If required, lightly
fold up the holding plate again to loosen the 1/4" screw 17 for
alignment of the measuring tool.
Laser Viewing Glasses (Accessory)
The laser viewing glasses filter out the ambient light. This
makes the red light of the laser appear brighter for the eyes.
Do not use the laser viewing glasses as safety goggles.
The laser viewing glasses are used for improved visualisa-
tion of the laser beam, but they do not protect against laser
radiation.
Do not use the laser viewing glasses as sun glasses or in
traffic. The laser viewing glasses do not afford complete
UV protection and reduce colour perception.
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