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| English
Practical advice
u
The measuring tool is equipped with a wireless interface. Local operating restric-
tions, e.g. in aeroplanes or hospitals, must be observed.
General advice
The reception lens
(15)
and the laser beam output
(16)
must not be covered during the
measuring process.
The measuring tool must not be moved during a measurement (with the exception of the
continuous measurement and grade measurement functions). For this reason, place the
measuring tool against or on a firm surface whenever possible.
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
(20)
(accessory) and the laser target plate
(19)
(accessory) or
shade the target area.
Influences on the measurement result
Due to physical effects, the possibility of inaccurate measurements when measuring vari-
ous surfaces cannot be excluded. These include:
– Transparent surfaces (e.g. glass, water)
– Reflective surfaces (e.g. polished metal, glass)
– Porous surfaces (e.g. insulating materials)
– Structured surfaces (e.g. roughcast, natural stone).
If necessary, use the laser target plate
(19)
(accessory) on these surfaces.
Inaccurate measurements are also possible where the laser is pointed at target surfaces
diagonally.
Layers of air at different temperatures and indirectly received reflections can also influ-
ence the measured value.
Checking accuracy and calibrating the grade measurement (see figure L)
Regularly check the accuracy of the grade measurement. This is accomplished by means
of a reverse measurement. To do this, lay the measuring tool on a table and measure the
inclination. Turn the measuring tool by 180° and measure the inclination again. The dif-
ference between the displayed values must not exceed 0.3°.
In the event of larger deviations, you have to recalibrate the measuring tool. To do so, se-
lect in the settings. Follow the instructions on the display.
We recommend that you perform an accuracy check and if necessary a calibration of the
measuring tool after extreme temperature variations and after impact to the tool. After a
1 609 92A 5YM | (19.01.2021)
Bosch Power Tools
Summary of Contents for Professional GLM 50-27 CG
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