Bosch GLL 2-10 Professional Notice Originale page 32

32 | English
– The discrepancy d between the two marked points Ⅰ and Ⅲ on wall A reveals the ac-
tual horizontal deviation of the measuring tool.
The maximum permitted deviation on the measuring distance of 2 × 5 m = 10 m is as fol-
lows:
10 m × ±0.3 mm/m = ±3 mm. The discrepancy d between points Ⅰ and Ⅲ must therefore
amount to no more than 3 mm.
Checking the Level Accuracy of the Vertical Line
For this check, you will need a door opening (on solid ground) which has at least 2.5 m of
space either side of the door.
– Place the measuring tool 2.5 m away from the door opening on a firm, flat surface (not
on a tripod). Switch on the measuring tool in the mode with automatic levelling. Se-
lect vertical mode and allow the measuring tool 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.
1 609 92A 7AN | (14.12.2021)
– 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.
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