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T
ECHNICAL
R
EFERENCE
M
ANUAL
Distance Laser Sensor
Page 15/43
4
Technical data
4.1 Measuring accuracy
The measuring accuracy corresponds to the ISO-recommendation
ISO/R 1938-1971 with a statistical confidence level of 95.4% (i.e. ±
twice the standard deviation , refer to diagram on the right). The
typical measuring accuracy relates to average conditions for
measuring. It is ±1.5mm for the MRL3 (H) 15 and ± 3.0mm for the
MRL3 (H) 30 valid in the tracking mode
The maximum measuring error relates to unfavorable conditions such
as:
-
Highly reflecting surfaces (e.g. reflector tapes)
-
Operation at the limits of the permitted temperature range,
adaptation to ambient temperature interrupted
-
Very bright ambient conditions, strong heat shimmer
and can be up to ± 2 mm for MRL3 (H) 15 and ± 5 mm for MRL3 (H)
30. The MRL3 (H) does not compensate changes of atmospheric environment. This changes can influence
the accuracy if measuring long distances (>150m) at conditions very different to 20°C, 60% relative humidity
and 953 mbar air pressure. The influences of the atmospheric environment is described in
B.Edlen: “
The Refractive Index of Air, Metrologia 2
”, 71
-80 (1966)
99.7%
95.4%