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– 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 (16) (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 inclination measurement (see figures E1–
E2)
Regularly check the accuracy of the inclination measurement. This is accomplished by
means of a reverse measurement. To do this, lay the measuring tool on a table and meas-
ure the inclination. Turn the measuring tool by 180° and measure the inclination again.
The difference between the displayed values must not exceed 0.3°.
In case of greater deviation, the measuring tool must be recalibrated. To do so, select
in the settings. Follow the directions 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
temperature variation, the measuring tool must acclimatise for a while before calibration
is performed.
Accuracy check of the distance measurement
You can check the accuracy of the measuring tool as follows:
– Choose a measuring section of approx. 3–10 m in length that is permanently un-
changed, the exact length of which is known to you (e.g. room width, door opening).
The measurement should be taken under favourable conditions, i.e. the measuring
section should be indoors with weak backlighting and the target surface for the meas-
urement should be smooth and reflect well.
– Measure the section ten times in succession.
The deviation of the individual measurements from the mean value must not exceed
±4 mm over the entire measuring section in favourable conditions. Record the measure-
ments, in order to be able to compare the accuracy later on.
Working with the tripod (accessory)
The use of a tripod is particularly necessary for larger distances. Place the measuring tool
with the 1/4" thread (13) on the quick-release plate of the tripod (18) or a conventional
camera tripod. Tighten it using the locking screw of the quick-release plate.
Bosch Power Tools
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1 609 92A 4RG | (15.11.2018)
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