MARWIS-UMB
Operating Manual V 3.3 / 9 Dec 2019
900
Road condition
0
1
2
3
4
5
6
8
99
dry
damp
wet
ice-covered
snow-/ice-covered
chemically wet
water + ice
snow-covered
undefined
dry:
no liquid water on the road;
water film height below damp threshold
damp:
liquid water on the road;
water film height below wet threshold
wet:
liquid water on the road;
water film height on or above wet threshold
ice-covered:
frozen water on the road mainly in the form of ice
snow- / ice-covered:
frozen water on the road either in the form of ice or snow; a more
precise differentiation is not possible
chemically wet:
the water film height is on or above the damp threshold and the road
surface temperature is below 1.5°C (34.7 °F); the formation of ice is
inhibited by the presence of de-icing chemicals
water + ice:
water film height is on or above the damp threshold and the road
surface temperature is below 1.5°C (34.7 °F) with the formation of ice
particles starting;
snow-covered:
frozen water on the road mainly in the form of snow
7.1.9 Ice percentage
Sampling rate........10 Hz
Units......................%
Channels:
UMB Channel
Measurement variable (float32)
Measuring range
min
max
unit
800
Ice Percentage
0.0
100.0
%
7.1.10 Snow Height
Sampling rate........10 Hz
Units......................mm
Channels:
UMB Channel
Measurement variable (float32)
Measuring range
min
max
unit
612
Snow Height
0.0
50
mm
7.1.11 Friction
Sampling rate........10 Hz
16
Chapter 7, Measurement output
