Berner 183846, Instruction Manual/Safety Instructions

Page: 23 / 498

21
ENGLISH
using a distance no shorter than the distance of the applications for
which the tool will be used.
TABLE 3
Ceiling Height
Allowable Distance
Between Marks
2.5 m (8‘) 1.5 mm (1/16“)
3.0 m (10‘) 2.0 mm (3/32“)
4.0 m (14‘) 2.5 mm (1/8“)
6.0 m (20‘) 4.0 mm (5/32“)
9.0 m (30‘) 6.0 mm (1/4“)
1. Place the laser on the fl oor and turn on both vertical beams.
2. Mark the position where the beams cross on the fl oor (F) and
also on the ceiling (G). Always mark the centre of the beams’
thickness.
3. Rotate the laser 180 degrees, and reposition it so the beam
crossing is exactly on the original mark on the fl oor.
4. Mark the position where the beams cross on the ceiling (H).
5. Measure the distance between the two ceiling marks. If the
measurement is greater than the values shown in Table 3, the
laser must be serviced at an authorised service centre.
CHECKING 90º ACCURACY BETWEEN VERTICAL BEAMS (FIG. 8A–8C)
Checking 90º accuracy requires an open fl oor area at least
10 m × 5 m (33’ × 18’). Refer to the graphic for the position of the
BCLL TOP at each step and for the location of the marks made at
each step.
Always mark the centre of the beams’ thickness.
TABLE 4
Distance from A to B
Allowable Distance
Between Marks
4.0 m (14‘) 3.5 mm (5/32“)
5.0 m (17‘) 4.5 mm (3/16“)
6.0 m (20‘) 5.5 mm (7/32“)
7.0 m (23‘) 6.0 mm (1/4“)