Maintenance And Service - Bosch GLL 3-50 Professional Notice Originale

OBJ_BUCH-1973-002.book Page 17 Thursday, October 10, 2013 4:45 PM
Checking plumb accuracy
For this check, a free measuring distance of approx. 5 m be-
tween floor and ceiling on a firm surface is required.
– Mount the measuring tool onto the rotating platform and
place it on the floor.
– Switch the measuring tool on and allow it to level.
– Mark the centre of the upper crossing point on the ceiling
(point I). Also mark the centre of the bottom laser point on
the floor (point II).
d
– Rotate the measuring tool 180°. Position it so that the cen-
tre of the lower laser point is on the point II which has al-
ready been marked. Allow the measuring tool to level.
Mark the centre of the upper laser point (point III).
– The difference d of both marked points I and III on the ceil-
ing results in the actual deviation of the measuring tool to
the plumb line.
In the measuring distance of 5 m the maximum permissible
deviation is: 5 m x ±0.6 mm/m x 2 = ±6 mm.
The difference d between the points I and III can therefore be
at most 6 mm.
Working Advice
 Always use the centre of the laser line for marking. The
width of the laser line changes with the distance.
Working with the Measuring Plate (Accessory)
(see figures G–H)
With the measuring plate 26, it is possible to project the laser
mark onto the floor or the laser height onto a wall.
With the zero field and the scale, the offset or drop to the re-
quired height can be measured and projected at another loca-
tion. This eliminates the necessity of precisely adjusting the
measuring tool to the height to be projected.
Bosch Power Tools
The measuring plate 26 has a reflective coating that enhances
the visibility of the laser beam at greater distances or in in-
tense sunlight. The brightness intensification can be seen on-
ly when viewing, parallel to the laser beam, onto the measur-
ing plate.
Working with the Tripod (Accessory)
A tripod offers a stable, height-adjustable measuring support.
Position the measuring tool with the 5/8" tripod mount 11 on-
to the thread of the tripod 22 or a commercially available con-
struction tripod. For fastening to a commercially available
camera tripod, use the 1/4" tripod mount 6. Tighten the
measuring tool with the tripod mounting stud.
5 m
Working with the Laser Receiver (Accessory)
(see figure E)
Under unfavourable light conditions (bright environment, di-
rect sunlight) and for larger distances, use the laser receiver
for improved finding of the laser lines 27. When working with
the laser receiver, switch the pulse function on (see "Pulse
Function", page 14).
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.
 Do not use the laser viewing glasses as sun glasses or in
180°
Work Examples
Work Examples (see figures A –F)
Applicational examples for the measuring tool can be found
on the graphics pages.

Maintenance and Service

Maintenance and Cleaning
Store and transport the measuring tool only in the supplied
case.
Keep the measuring tool clean at all times.
Do not immerse the measuring tool in water or other fluids.
Wipe off debris using a moist and soft cloth. Do not use any
cleaning agents or solvents.
Regularly clean the surfaces at the exit opening of the laser in
particular, and pay attention to any fluff of fibres.
For repairs, only send in the measuring tool in the case.
After-sales Service and Application Service
Our after-sales service responds to your questions concern-
ing maintenance and repair of your product as well as spare
parts. Exploded views and information on spare parts can al-
so be found under:
www.bosch-pt.com
Bosch's application service team will gladly answer questions
concerning our products and their accessories.
The laser viewing glasses are used for improved visualisa-
tion of the laser beam, but they do not protect against laser
radiation.
traffic. The laser viewing glasses do not afford complete
UV protection and reduce colour perception.
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