IRS31Pro-UMB
Operating Manual V10 / 01.2020
G. Lufft Mess- und Regeltechnik GmbH
39
13 Technical Data
Power supply:
12 VDC
Operating voltage range:
0.75 .. 1.15 * Power supply
Current consumption:
Typically approx. 8.5 mA (sampling rate 10 s)
Typically approx. 5 mA (sampling rate 1 min.)
at 12VDC
Inrush current:
Approx. 1A (5ms) at 12VDC
Sensor dimensions:
Height 50 mm
120 mm
Sensor weight:
Approx. 800g without cable and without external
Temperature sensor
Protection class:
III (SELV)
Protection type:
IP68
Storage conditions
Permissible storage temperature:
-40°C … +70°C (in packing)
Permissible relative humidity:
0 … 95% RH non-condensing (in packing)
Operating conditions
Permissible ambient temperature:
-40°C … +80°C
Permissible relative humidity:
0 … 100% RH
Permissible altitude above sea level: 3000 m
Interface SDI12 or RS485, 2 wire, half-duplex
Data bits:
8
Stop bit:
1
Parity:
None
Adjustable baud rates:
1200, 2400, 9600, 19200
1
, 38400
13.1 Measuring Range / Accuracy
13.1.1 Road Surface Temperature
Measurement process:
ntc
Measuring range:
-40°C … +80°C
Resolution:
< 0.02°C (-20…+20), oth/-0.1
Accuracy:
+/- 0.1°C (-20…+20), oth/-0.2
Sampling rate:
Variable (10 s….60 s)
Units:
°C; °F
13.1.2 Water Film Height
Measurement process:
Radar
Measuring range:
0 … 4000 µm
Resolution:
Better than 0.01mm
Accuracy:
0.2mm to 4mm: better than +/-30%
Sampling rate:
Variable (10 sec….60 sec)
Units:
µm, mil
13.1.3 Freezing Temperature
Measurement process:
Calculated from saline concentration
Measuring range:
-40°C … 0°C
Resolution:
0.1°C
1
Factory setting and baud rate for firmware update
