Working Advice - Bosch GLM 30 Operating/Safety Instructions Manual

General Information
The reception lens 11 and the laser beam outlet 12 must not be
covered when taking a measurement. Measurement takes place
at the center of the laser beam, even when target surfaces are at
a slope.
Influence on the Measuring Range
The measuring range depends on the light conditions and the
reflection properties of the target surface.
Influence on the Measuring Result
Due to physical effects, faulty measurements cannot be excluded
when measuring on different surfaces which include:
– 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).
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 permanent measuring section with a length of
approx. 3 ft to 33 ft (1 m to 10 m); 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 in a row.
The deviation of the individual measurements from the
mean value must not exceed ±1/16" (±1.5 mm). Log the
measurements, so that you can compare their accuracy at a later
point of time.

Working Advice

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