Bosch Professional GLL 12-22 Manual Original página 19

– Place the measuring tool 2.5 m away from the door opening on a firm, flat surface (not
on a tripod). Turn the measuring tool on the magnetic rotating mount (3) so that the
laser outlet aperture (1) is not obstructed. Switch the measuring tool on and allow it
to level in.
– Mark the centre of the laser line on the upper edge of the door opening as point Ⅳ.
– The discrepancy d between the two marked points Ⅲ and Ⅳ reveals the actual ver-
tical deviation of the measuring tool.
– Measure the height of the door opening.
You can calculate the maximum permitted deviation as follows:
GLL 12‑22:
Doubled height of the door opening × 0.8 mm/m
Example: At a door opening height of 2 m, the maximum deviation amounts to
2 × 2 m × ±0.8 mm/m = ±3.2 mm. The points Ⅲ and Ⅳ must therefore be no further
than 3.2 mm from each other.
GLL 12‑22 G:
Doubled height of the door opening × 0.6 mm/m
Bosch Power Tools
– Mark the centre of the vertical laser line
on the floor of the door opening
(point Ⅰ), 5 m away on the other side of
the door opening (point Ⅱ) and on the
upper edge of the door opening
(point Ⅲ).
– Set up 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 way that its centre passes through
points Ⅰ and Ⅱ exactly.
1 609 92A 8C4 | (05.07.2023)
English | 19