Working Advice; Setting The Display Of The Units; Laser Viewing Glasses (Accessory); Working With The Tripod (Accessory) - Bosch LR 50 Originalbetriebsanleitung

OBJ_BUCH-1960-004.book Page 46 Thursday, October 13, 2016 12:38 PM
46 | English
The out-of-level indicator 37 flashes dur-
ing automatic levelling.
– Wait until the measuring tool is levelled in.
– Press the slope button 18 or 20 until
/ the laser beam is as parallel as possible
to the vertical line on the wall.
– If you do not achieve congruence, repeat the previous
steps (align tripod, allow measuring tool to level in, align la-
ser beam using slope buttons).
– Press the calibration button 25 to save
the calibration.
The symbol for completing calibration is
shown on the display.
– In order to rule out faulty calibration after completion
of the calibration, you must check the levelling accuracy
(see "Checking the Levelling Accuracy in the Vertical Posi-
tion". page 44).
If the deviation is still outside of the maximum permitted
limit of ±1 mm, have the measuring tool checked by a
Bosch customer service agent.

Working Advice

The measuring tool is equipped with a radio interface.
Local operating restrictions, e.g. in airplanes or hospi-
tals, are to be observed.
Always use the centre of the laser line for marking. The
width of the laser line changes with the distance.

Setting the Display of the Units

The distance between rotational plane and centre line is
shown on the display in [mm] or [inch: decimals/fractions].
The default setting in the delivery condition is
[mm].
– Simultaneously press the measuring accuracy
setting button 23 and the slope button 20 re-
peatedly until the desired setting is reached.
The setting for the units is saved when the tool is switched off.

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.
1 609 92A 274 | (13.10.16)

Working with the Tripod (Accessory)

The measuring tool is equipped with a 5/8" tripod mount for
horizontal operation on a tripod. Place the measuring tool via
the tripod mount onto the 5/8" male thread of the tripod and
screw the locking screw of the tripod tight.
On a tripod 63 with a measuring scale on the elevator column,
the height difference can be adjusted directly.

Working with Wall Mount/Alignment Unit (Accessory)

You can also mount the measuring tool to the wall mount with
alignment unit 59. For this, screw the 5/8" screw 62 of the
wall mount into the tripod mount of the measuring tool.
Mounting to a wall: Mounting to a wall is recommended, e.g.,
for work above the elevation height of tripods or for work on
unstable surfaces and without tripod. For this, fasten the wall
mount 59, with the measuring tool mounted, as vertical as
possible to a wall.
For mounting to the wall, you can either fasten the wall mount
59 with fastening screw 60 to a lath (width maximal 8 mm) or
hang it up with two hooks.
Mounting on a tripod: The wall mount 59 can also be screwed
onto a tripod with the tripod mount on the back side. This
method of fastening is especially recommended for work where
the rotational plane is to be aligned with a reference line.
With the alignment unit, the mounted measuring tool can be
moved vertically (when mounted to the wall) or horizontally
(when mounted to a tripod) within a range of approx. 16 cm.
For this, loosen screw 61 on the alignment unit, move the
measuring tool to the desired position, and retighten screw
61 again.
Working with the Measuring Rod (Accessory)
(see figure H)
For checking irregularities or projecting gradients, it is recom-
mended to use the measuring rod 55 together with the laser
receiver.
A relative millimetre scale (±50 cm) is marked on the top of
the measuring rod 55. Its zero height can be preset at the bot-
tom of the elevator column. This allows for direct reading of
deviations from the specified height.

Work Examples

Checking the Depth of Building Pits (see figure I)

– Position the measuring tool on a firm surface or mount it to
a tripod 63.
– Working with tripod: Align the laser beam to the requested
height. Project or check the height at the target location.
Working without tripod: Determine the height difference
between the laser beam and the height at the reference
point. Project or check the measured height difference at
the target location.
When measuring over long distances, the measuring tool
should always be set up in the centre of the work surface and
on a tripod, in order to reduce interferences.
– When working on unstable ground, mount the measuring
tool on the tripod 63. Ensure that the anti-drift system is ac-
tivated in order to prevent incorrect measurements in the
event of ground movements or shocks to the measuring tool.
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