Operating Manual

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), otherwise +/-0.1
Accuracy: +/- 0.1°C (-20…+20), otherwise +/-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