Working Advice - Bosch GRL 400 H Professional Manual Original

OBJ_BUCH-1179-001.book Page 24 Thursday, August 5, 2010 10:04 AM
24 | English
– Without turning the measuring tool, position
it close to wall B. Switch the measuring tool
on and allow it to level in.
A
– Align the height of the measuring tool (using
the tripod or by propping), so that the centre
of the laser beam runs exactly against the
previously marked point II on wall B.
A
– Rotate the measuring tool by 180° without
changing the height. Allow it to level in and
mark the centre point of the laser beam on
wall A (point III). Take care that point III is as
vertical as possible above or below point I.
– The difference d of both marked points I and
III on wall A amounts to the actual deviation
of the measuring tool for the measured axis.
Repeat the measuring procedure for the other
three axes. For this, turn the measuring tool
prior to each measuring procedure by 90°.
On the measuring section of 2 x 20 m = 40 m,
the maximum allowable deviation is:
40 m x ±0.08 mm/m = ±3.2 mm.
Consequently, the difference d between points I
and III for each of the four individual measure-
ments may not exceed 3.2 mm max.
If the measuring tool should exceed the maxi-
mum deviation in anyone of the four measuring
procedures, have it checked at a Bosch after-
sales service agent.
2 610 A13 330 | (5.8.10)

Working Advice

Always use the centre of the laser line for
marking. The width of the laser line changes
with the distance.
B
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 visualisation 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 glass-
es do not afford complete UV protection and
reduce colour perception.
Working with the Laser Receiver (Accessory)
B
180°
Under unfavourable light conditions (bright en-
vironment, direct sunlight) and for larger dis-
tances, use the laser receiver for improved find-
ing of the laser beam 20.
Before working with the laser receiver, read and
observe the laser receiver operating instructions.
Working with the Tripod (Accessory)
The measuring tool is equipped with a 5/8" tri-
pod mount for horizontal operation on a tripod.
Place the measuring tool via the tripod mount
12 onto the 5/8" male thread of the tripod and
screw the locking screw of the tripod tight.
On a tripod 18 with a measuring scale on the el-
evator column, the height difference can be ad-
justed directly.
Bosch Power Tools