Bosch Professional GLM 50-27 CG Original Instructions Manual page 18

18 | English
The reception lens (15) and the laser beam output (16) must not be covered dur-
ing the measuring process.
Influences on the Measuring Range
The measuring range depends on the lighting conditions and the reflective properties of
the target surface.
For better visibility of the laser beam in bright extraneous light, use the laser viewing
glasses (27) (accessory) and the laser target plate (26) (accessory), or shade the target
surface.
Influences on the Measurement Result
Due to physical effects, incorrect measurements are possible when measuring on various
surfaces. These include:
– Transparent surfaces (e.g. glass, water)
– Reflective surfaces (e.g. polished metal, glass)
– Porous surfaces (e.g. insulation materials)
– Structured surfaces (e.g. roughcast, natural stone)
If necessary, use the laser target plate (26) (accessory) on these surfaces.
Incorrect measurements are also possible on slanted target surfaces.
Likewise, layers of air with different temperatures or indirectly received reflections can in-
fluence the measured value.
Navigation in the Menus
In the menus, you can switch to the right with the
button.
To confirm a selection, press the
Press the button to exit the menu.
Selecting the Reference Level
For the measurement, you can select from various reference levels:
The rear edge of the measuring tool (e.g. when placing against walls)
The centre of the tripod thread (14) (e.g. for tripod measurements)
1 609 92A 8KF | (08.05.2023)
button and to the left with the
button or the button.
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