Bosch GLL 2-20 360+BM3 [11/74] Checking the level accuracy of the vertical line

Bosch 0601063J00 [11/0] Checking the level accuracy of the vertical line
English | 11
A
B
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 on wallB.
A
B
d
180°
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. Allow the measuring
tool to level in and mark the point where the laser lines
cross on wallA (point).
The discrepancy d between the two marked points and
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×±0.4mm/m=±4mm. The discrepancy d between
points and must therefore amount to no more than 4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 open-
ing on a firm, flat surface (not on a tripod). Select vertical
mode with automatic levelling. Aim the vertical laser line
at the door opening and allow the measuring tool to level
in.
2,5 m
2,5 m
Mark the centre of the vertical laser line on the floor of the
door opening (point), 5m away on the other side of the
door opening (point) and on the upper edge of the door
opening (point).
2 m
d
Rotate the measuring tool 180° and position it on the
other side of the door opening, directly behind point.
Allow the measuring tool to level in and align the vertical
laser line in such a way that its centre passes through
points and exactly.
Mark the centre of the laser line on the upper edge of the
door opening as point.
The discrepancy d between the two marked points and
reveals the actual vertical deviation of the measuring
tool.
Measure the height of the door opening.
You can calculate the maximum permitted deviation as fol-
lows:
Doubled height of the door opening×0.4mm/m
Example: At a door opening height of 2m, the maximum de-
viation amounts to
2×2m×±0.4mm/m=±1.6mm. The points and
must therefore be no further than 1.6mm from each other.
Bosch Power Tools 1 609 92A 4HK | (08.10.2020)

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