Manual Bosch GRL 250 HV (page 27 of 351) (English, German, Dutch, Danish, French, Italian, Polish, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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Bosch Power Tools 1 609 92A 0D9 | (24.3.14)

Working with Wall Mount/Alignment Unit (Accessory)

(see figure B)

You can also mount the measuring tool to the wall mount with

alignment unit 39. For this, screw the 5/8" screw 42 of the

wall mount into the tripod mount 18 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 39, with the measuring tool mounted, as vertical as

possible to a wall.

For mounting to the wall, you can either fasten the wall mount

39 with fastening screw 40 to a lath (width maximal 8 mm) or

hang it up with two hooks.

Mounting on a tripod: The wall mount 39 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 41 on the alignment unit, move the

measuring tool to the desired position, and retighten screw

41 again.

Working with the Ceiling Measurement Plate

(see figure B)

As an example, the ceiling measurement plate 44 can be used

for easy height adjustment of drop ceilings. Fasten the ceiling

measurement plate with the magnetic holder, e.g., to a beam.

The reflecting half of the ceiling measurement plate improves

the visibility of the laser beam in unfavourable conditions; the

laser beam can also be seen from the rear side through the

transparent half.

Working with the Laser Target Plate (Accessory)

(see figure C)

With the laser target plate 43, the laser mark can be projected

on the ground/floor or against a wall. With the magnetic hold-

er, the laser target plate can also be fastened to ceiling con-

structions.

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.

The laser target plate 43 has a reflecting coating which im-

proves the visibility of the laser beam from a larger distance or

in case of strong sun rays. The luminosity can be recognized

only if you look to the laser target plate in parallel to the laser

beam.

Working with the Measuring Rod (Accessory)

(see figure J)

For checking irregularities or projecting gradients, it is recom-

mended to use the measuring rod 36 together with the laser

receiver.

A relative millimetre scale (±50 cm) is marked on the top of

the measuring rod 36. 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

Projecting/Checking Heights (see figure C)

– Position the measuring tool in the horizontal position onto

a firm support or mount it onto a tripod 37 (accessory).

– 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 with the laser target plate 43. Project or check the

measured height difference at the target location.

Parallel Alignment of a Plumb Beam/Projecting Right An-

gles (see figure D)

When right angles are to be projected or when partitions are

to be aligned, the plumb beam 9 must be aligned parallel,

meaning at the same distance to a reference line (e.g. a wall).

– For this, set up the measuring tool in the vertical position

and position it in such a manner that the plumb beam runs

approximately parallel to the reference line.

– For exact positioning, measure the clearance between

plumb beam and reference line directly on the measuring

tool with help of the laser target plate 43. Measure the

clearance between plumb beam and reference line again

as far away as possible from the measuring tool. Align the

plumb beam in such a manner that it has the same clear-

ance to the reference line as when measured directly at the

measuring tool.

The right angle to the plumb beam 9 is indicated by the varia-

ble laser beam 6.

Indicating a Plumb Line/Vertical Plane (see figure E)

To indicate a plumb line or a vertical plane, set up the measur-

ing tool in the vertical position. When the vertical plane is sup-

posed to run at a right angle to a reference line (e.g. a wall),

then align the plumb beam 9 with this reference line.

The plumb line is indicated by the variable laser beam 6.

OBJ_BUCH-757-008.book Page 27 Monday, March 24, 2014 11:19 AM

My Bosch grl250hv will not turn on in the horizontal position Submitted on 19-4-2023 at 16:22
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Bosch GRL 250 HV Manual

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