Working Advice - Bosch GCL 2-15 Professional Manual Original

OBJ_BUCH-2637-003.book Page 22 Friday, July 1, 2016 9:19 AM
22 | English
– Position the measuring tool on the other side of the door
opening directly behind point II. Allow the measuring tool
to level in and align the vertical laser line in such a manner
that its centre runs exactly through points I and II.
– The difference d between point III and the centre of the la-
ser line at the upper edge of the door opening results in the
actual deviation of the measuring tool from the vertical
plane.
– Measure the height of the door opening.
The maximum permitted deviation d is calculated as fol-
max
lows:
d = double height of the door openingx 0.3 mm/m
max
Example: With a door opening height of 2 metres, the maxi-
mum permitted deviation is
d = 2 x2 mx 0.3 mm/m= 1.2 mm. Thus, the marks must
max
not be more than 1.2 mm apart.
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 mount 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).
5 m
1 609 92A 32T | (1.7.16)
– 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).
d
180°
– 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.
The maximum permitted deviation d can be calculated as
max
follows:
d = double the distance between floor and ceiling
max
x0.7 mm/m
Example: If the distance from the floor to the ceiling is 5 m,
the maximum deviation is
d = 2 x5 mx 0.7 mm/m= 7 mm. The marks must there-
max
fore be maximum 7 mm apart.

Working Advice

For marking, always use only the centre of the laser
point or the laser line. The size of the laser point as well as
the width of the laser line change with distance.
Working with the Tripod (Accessory)
A tripod offers a stable, height-adjustable measuring support.
Position the measuring tool with the 1/4" tripod mount 9 onto
the thread of the tripod or a commercially available camera
tripod. For fastening to a commercially available construction
tripod, use the 5/8" tripod mount 10. Tighten the measuring
tool with the tripod mounting stud.
– Adjust the tripod roughly before switching on the measur-
ing tool.
Fastening with the Universal Holder (Accessory)
(see figure H)
With the universal holder 18, you can fasten the measuring
tool, e.g., to vertical surfaces, pipes or magnetisable materi-
als. The universal holder is also suitable for use as a ground tri-
pod and makes the height adjustment of the measuring tool
easier.
– Adjust the universal holder roughly before 18 switching on
the measuring tool.
Working with the Laser Target Plate (see figure H)
The laser target plate 22 increases the visibility of the laser
beam under unfavourable conditions and at large distances.
The reflective part of the laser target plate 22 improves the
visibility of the laser line. Thanks to the transparent part, the
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