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Installation and functional test
8.2
Permissible error limits
Distance
Speed
Edition 07/2007
Permissible error limit of the distance measurement (on a distance
of at least 1000 m):
•
± 1 % before installation
•
± 2 % during installation and during the regularly inspections
•
± 4 % during operation
Accuracy (resolution) of the distance measurement:
•
at least 0,1 km
In order to achieve a permissible error limit of the displayed speed
during operation of ± 6 km/h, the following influences must be con-
sidered:
•
Error limit of ± 2 km/h for input deviations (such as tire devia-
tions)
•
Error limit of ± 1 km/h during installation measurements or regu-
larly inspections
From this results the permissible error limit of the speed meas-
urement (with speed between 20 and 180 km/h, characteristic coef-
ficient of the vehicle between 4000 and 25000 pulses/km):
•
± 1 km/h
Due to the data storage resolution, there is another permissible error
limit of ± 0.5 km/h for the speed saved by the recording equipment.
Accuracy of the speed measurement:
•
at least 1 km/h
Technical Description DTCO 1381
8.2 Permissible error limits
8 - 5
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