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02/08/2016
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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
ơ
, refer
to diagram on the right). The typical measuring accuracy relates to average conditions
for measuring. It is ± 1.5 mm for the LLB65-00100 and ± 3 mm for theLLB65-00101,
as well as ± 1 mm for the LLB500-00100 and ± 3 mm for the LLB500-00101, valid in
the tracking mode.
The maximum measuring error relates to unfavorable conditions such as:
- Highly reflective surfaces (e.g. reflector tapes)
- Operation at the limits of the permitted temperature range, adaptation to
ambient temperature canceled
- Very bright ambient conditions, strong heat shimmer
and can be up to ± 2 mm for LLB65-00100 and LLB500-00100, as well as ± 5 mm for
LLB65-00101 and LLB500-00101.
The LLB does not compensate changes of atmospheric environment. These changes
can influence the accuracy if measuring long distances (> 150 m with LLB-500) under
conditions very different from
●
20°C,
●
60% relative humidity
●
and 953 mbar air pressure.
The influences of the atmospheric environment are described in
B.Edlen: “
The Refractive Index of Air, Metrologia 2
”, 71-80 (1966)
