Technical data

TECHNICAL REFERENCE MANUAL
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
σ, refer to diagram on the right). The typical
measuring accuracy relates to average conditions for measuring. It is
±1.5mm for the DLS-A(H) 15 and ± 3.0mm for the DLS-A(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 DLS-A(H) 15 and ± 5 mm for DLS-A(H) 30. The DLS-A(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)
Distance Laser Sensor Page 13/40
99.7%
95.4%