Bosch GLM 40 Instrucciones De Funcionamiento Y Seguridad página 16

INFLUENCE EFFECTS ON THE
MEASURING RESULT
Due to physical effects, faulty
measurements cannot be
excluded when measuring on
different surfaces. Included here
are:
– Transparent surfaces (e.g.,
glass, water),
– Reflecting surfaces (e.g.,
polished metal, glass),
– Porous surfaces (e.g.
insulation materials),
– Structured surfaces (e.g.,
roughcast, natural stone).
If required, use the laser target
plate 18 (accessory) on these
surfaces.
Furthermore, faulty
measurements are also possible
when sighting inclined target
surfaces.
Also, air layers with varying
temperatures or indirectly
received reflections can affect
the measured value.
ACCURACY CHECK OF THE
DISTANCE MEASUREMENT
The accuracy of the distance
measurement can be checked as
follows:
– Select a permanently
unchangeable measuring section
with a length of approx. 1 to
30-ft; its length must be precisely
known (e.g. the width of a room
or a door opening).
The measuring distance must be
indoors; the target surface for the
measurement must be smooth
and reflect well.
– Measure the distance 10 times.
The deviation of the individual
measurements from the mean
value must not exceed ±3/32"
(max.). Log the measurements,
so that you can compare their
accuracy at a later point of time.
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