IRS31Pro-UMB
Operating Manual V10 / 01.2020
G. Lufft Mess- und Regeltechnik GmbH
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Figure 14: Sensor Configuration: Setting Thresholds
Threshold [°C] for critical road conditions: Critical road conditions such as ice, wet / moist with salt can
occur below this threshold.
Threshold temperature for determining
freezing temperature [°C]:
The freezing temperature is calculated when the measured
road surface temperature is less than or equal to the set
threshold temperature. (Factory setting 4°C)
Deicer
The freezing temperature of the used deicer is included in
the model calculations for the road conditions. It therefore
has an effect on the derived channels. Friction and ice
percentage at the moment is only supported for NaCl.
Threshold [µm] dry-moist:
When the water film height lies below the threshold set
here, the IRS31PRO-UMB transmits the road surface
condition "dry" (provided that no ice is detected) and no
longer calculates the freezing temperature. (Factory setting
10µm)
Threshold [µm] moist-wet:
Threshold between the Lufft road surface conditions "moist"
and "wet".
Threshold TLS[µm] dry-wet:
For adaptation to the different thresholds in the different
versions of TLS; for TLS2012: 10µm, for TLS 2003 and
older: 30µm.
