Operating Manual V8.2/03.2017
Non Invasive Road Sensor
G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany
45
19.4.4 Standardization of Measurement Values in ASCII Protocol
The standardization of measurement values from 0d
– 65520d corresponds to the measuring
range of the respective measurement variable.
Measurement Variable
Measuring Range
min
max
unit
Temperature
Road surface temperature
-40.0
70.0
°C
-40.0
158.0
°F
Freezing temperature
-40.0
0.0
°C
-40.0
32.0
°F
Water film height
Water film height
0.0
2000.0
µm
Snow depth
Snow depth
0.0
10.0
mm
Percentage
Ice percentage
0.0
100.0
%
Saline concentration
0.0
100.0
%
Friction
0.0
1.0
none
19.4.5 Status and Error Codes in ASCII Protocol
Various error codes are defined from 65521d
– 65535d in addition to the standardization of
measurement values.
Codes:
<code>
Description
65521d
Invalid channel
65523d
Measurement value outside measuring range (too high)
65524d
Measurement value outside measuring range (too low)
65525d
Measurement data error or no valid data available
65526d
Device / sensor unable to execute valid measurement due to ambient conditions
65534d
Invalid calibration
65535d
Unknown error
