Bosch GRC Professional GRL 300 HV Originalbetriebsanleitung Seite 24

24 | English
d
– Rotate the measuring tool 180° without changing its posi-
tion. Allow it to level in and mark the centre point of the
laser beam on the wall (point Ⅱ). Note that point Ⅱ should
preferably be positioned vertically above or below point Ⅰ.
The discrepancy d between the two marked points Ⅰ and Ⅱ
on the wall reveals the actual height deviation of the measur-
ing tool for the axis being measured.
Repeat the measuring process for the other axis. To do this,
turn the measuring tool by 90° before beginning the meas-
urement.
The maximum permitted deviation on the 30 m measuring
distance is as follows:
30 m × ±0.1 mm/m = ±3 mm. The discrepancy d between
points Ⅰ and Ⅱ must therefore amount to no more than 6 mm
for each of the two measuring processes.
Working Advice
Only the centre of the laser point or laser line must be
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used for marking. The size of the laser point/the width of
the laser line changes depending on the distance.
Working with the Laser Target Plate (see figure C)
The laser target plate (41) improves visibility of the laser
beam in unfavourable conditions and at greater distances.
The reflective surface of the laser target plate (41) improves
visibility of the laser line. The transparent surface enables
the laser line to be seen from behind the laser target plate.
Working with the Tripod
A tripod offers a stable, height-adjustable support surface
for measuring. Place the measuring tool with the 5/8" tripod
mount (15) on the thread of the tripod (32). Tighten the
measuring tool using the locking screw of the tripod.
On a tripod featuring a measuring scale on its extender, you
can set the height deviation straight away.
Roughly align the tripod before switching on the measuring
tool.
Working with the WM 4 Wall Mount (see figure D)
You can also mount the measuring tool on the wall mount
with the alignment unit (36). For this, screw the 5/8"
screw (38) of the wall mount into the tripod mount (15) of
the measuring tool.
Mounting on a wall: Wall-mounting is advisable, for ex-
ample for work performed above the maximum extension
height of tripods, or for work on unstable surfaces and
without tripods.
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Fasten the wall mount (36) either to a wall using screws
through the fixing holes (34) or to a strip of wall using the
180°
fastening screw (33). Fit the wall mount as perpendicular as
possible to the wall and ensure it is mounted in a stable way.
Mounting on a tripod: You can also screw the wall
mount (36) on to a tripod (35) using the tripod mount on
the back. This type of mount is particularly suited to work
where the rotation level is supposed to be aligned to a refer-
ence line.
You can use the alignment unit to slide the measuring tool
vertically (if mounted on the wall) or horizontally (if mounted
on a tripod) up to approx. 16 cm. To do this, loosen the
bolt (37) on the alignment unit, slide the measuring tool into
the required position, and retighten the bolt (37).
Working with the Laser Receiver
Use the laser receiver (30) to improve detection of the laser
lines in adverse lighting conditions (bright environment, dir-
ect sunlight) and over greater distances.
For rotary lasers with multiple operating modes, select the
horizontal or vertical operation with the highest rotational
speed.
Before working with the laser receiver, read and observe the
laser receiver operating instructions.
Working with the Remote Control
When pressing the operating controls, it is possible to bring
the measuring tool out of its level position, so that the rota-
tion is briefly interrupted. This effect is avoided when using
the remote control.
Sensors (7) for the remote control are located on three sides
of the measuring tool, including above the control panel on
the front.
Working with the Measuring Rod (see figure E)
To check levels or apply slopes, it is recommended to use
the measuring rod (31) together with the laser receiver.
A relative measuring scale is incorporated at the top of the
measuring rod (31). You can preselect its zero at the bottom
on the extender. This enables you to read deviations from
the target height straight away.
Laser Goggles
The laser goggles filter out ambient light. This makes the
light of the laser appear brighter to the eye.
Do not use the laser goggles (accessory) as protective
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goggles. The laser goggles make the laser beam easier to
see; they do not protect you against laser radiation.
Do not use the laser goggles (accessory) as
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sunglasses or while driving. The laser goggles do not
provide full UV protection and impair your ability to see
colours.
Example applications
Projecting/Checking Heights (see figure F)
Position the measuring tool in the horizontal position on a
firm support or mount it on a tripod (32).
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