CST/BERGER MP3 Manual Original página 24

Checking the Horizontal Levelling Accuracy of the Longitudinal Axis
A free measuring distance of 20 m on a firm surface between two walls A and
B is required for the check.
– Mount the measuring tool onto the holder or a tripod, or place it on a firm
and level surface close to wall A. Switch the measuring tool on.
– Direct the horizontal laser beam, which runs parallel to the longitudinal axis
of the measuring tool, at the close wall A. Allow the measuring tool to level
in. Mark the centre of the laser beam on the wall (point I).
– Turn the measuring tool around by 180°, allow it to level in and mark the
centre point of the laser beam on the opposite wall B (point II).
– Without turning the measuring tool, position it close to wall B. Switch the
measuring tool on and allow it to level in.
– Align the height of the measuring tool (using the tripod or by underlaying, if
required) in such a manner that the centre point of the laser beam is pro-
jected exactly against the previously marked point II on wall B.
24 | English
A
A
180˚
A
20 m
B
B
B
2 610 A15 119 • 22.10.09