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A
180°
– Turn the measuring tool 180°, allow it to level in and mark
the point where the laser lines cross on the opposite wall
B (point Ⅱ).
– Position the measuring tool – without rotating it – close to
wall B, switch it on and allow it to level in.
A
– Align the height of the measuring tool (using the tripod or
by placing objects underneath as required) so that the
point where the laser lines cross exactly hits the previ-
ously marked point Ⅱ on wall B.
A
d
– Turn the measuring tool 180° without adjusting the
height. Aim it at wall A such that the vertical laser line runs
through the already marked point Ⅰ. Allow the measuring
tool to level in and mark the point where the laser lines
cross on wall A (point Ⅲ).
– The discrepancy d between the two marked points Ⅰ and
Ⅲ on wall A reveals the actual height deviation of the
measuring tool.
The maximum permitted deviation on the measuring dis-
tance of 2 × 5 m = 10 m is as follows:
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.
Bosch Power Tools
Checking the Level Accuracy of the Horizontal Line
For this check, you will need a free area of 5 × 5 m.
B
– Mount the measuring tool in the middle between walls A
and B on a tripod, or place it on a firm, level surface. Se-
lect horizontal line mode with automatic levelling and al-
low the measuring tool to level in.
B
– At a distance of 2.5 m from the measuring tool, mark the
centre of the laser line on both walls (point Ⅰ on wall A and
point Ⅱ on wall B).
A
B
180°
– Set up the measuring tool at a 5 m distance and rotated
by 180° and allow it to level in.
– Align the height of the measuring tool (using the tripod or
by placing objects underneath as required) so that the
centre of the laser line exactly hits the previously marked
point Ⅱ on wall B.
– Mark the centre of the laser line on wall A as point Ⅲ (ver-
tically above or below point Ⅰ).
– The discrepancy d between the two marked points Ⅰ and
Ⅲ on wall A reveals the actual horizontal deviation of the
measuring tool.
The maximum permitted deviation on the measuring dis-
tance of 2 × 5 m = 10 m is as follows:
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.
A
B
1 609 92A 8M1 | (19.04.2023)
English | 27
B
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