Measuring Functions - Bosch PLL 1 P Manual Original

20 | English
ted to a substantial knock or is dropped, check it by comparing it to a known hori-
zontal or vertical reference line.
Switching On/Off
To switch on the measuring tool in line operation, push the on/off switch (1) to the — po-
sition, and in point operation, push to the ● position. Immediately after being switched
on, the measuring tool sends a laser beam out of outlet aperture (5) (line operation)
or (11) (point operation), depending on the operating mode selected.
Do not direct the laser beam at persons or animals and do not stare into the laser
u
beam yourself (even from a distance).
To switch off the measuring tool, push the on/off switch (1) to the centre position.
Never leave the measuring tool unattended when switched on, and ensure the
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measuring tool is switched off after use. Others may be blinded by the laser beam.

Measuring functions

Note: The specified levelling accuracy applies for the alignment of the laser beam with
reference to the spirit levels for vertical alignment (3) and for horizontal alignment (4).
Positioning the Measuring Tool (see figure B)
For precise alignment with the spirit levels, the position of the measuring tool is import-
ant.
The listed levelling accuracy is only achieved when the measuring tool is properly posi-
tioned:
– For horizontal alignment using the spirit level for horizontal alignment (4), the alu-
minium supporting surface (2) of the measuring tool must face downward.
– For vertical alignment using the spirit level for vertical alignment (3), the laser outlet
aperture for line operation (5) must face upward and the aluminium supporting sur-
face (2) of the measuring tool must face to the side.
Alignment with Laser Line (Line Operation)
Position the measuring tool with the three supporting points (6) against the wall or with
help of the magnets (9), fasten it to the holder (14) or to another magnetic surface.
Horizontal alignment (see figures C–D): The aluminium supporting surface (2) of the
measuring tool must face downward. Horizontally align the measuring tool using the
spirit level (4). As an example, you can align picture frames or shelves alongside the hori-
zontal laser line.
Note: Horizontal alignment using the laser line is only possible on the surface against
which the measuring tool was placed. Even if the measuring tool has been aligned using
1 609 92A 56S | (26.08.2019) Bosch Power Tools