Lufft VENTUS-UMB - Measuring Range; Accuracy

Operating Manual V25/09.2019 Ventus / Ventus-X / V200A
Chapter 15 Technical Data 33
15.1 Measuring Range / Accuracy
15.1.1 Wind Speed
Measurement process: Ultrasound
Measuring range: 0 – 90m/s
Resolution: 0.1m/s
Accuracy: ±0,2 m/s or ±2% (0 … 65m/s) RMS (metal)
(the higher value)
±5% (> 65m/s) RMS (metal)
±0,3 m/s oder ±3% (0 … 35m/s) RMS (plastics)
(the higher value)
±5% (> 35m/s) RMS (plastics)
Response threshold (adjustable): 0.1 m/s (metal)
0.3 m/s (plastics)
Sampling rate: 250ms; 1-10 seconds
Units: m/s; km/h; mph; kts
15.1.2 Wind Direction
Measurement process: Ultrasound
Measuring range: 0 – 359.9°
Resolution: 0.1°
Accuracy: <2° (> 1m/s) RMSE (metal)
< 3° (> 1m/s) RMSE (plastics)
Response threshold (adjustable): 0.1 m/s (metal)
0.3 m/s (plastics)
Sampling rate: 250ms; 1-10 seconds
15.1.3 Virtual Temperature
Measurement process: Ultrasound
Measuring range: -50°C ... +70°C
Resolution: 0.1°C
Sensor accuracy: +/- 2.0 K (unheated and without solar irradiation
or wind speed above 4 m/s)
Sampling rate: 1-10 seconds
Units: °C; °F
15.1.4 Air Pressure
Measurement process: MEMS sensor - capacitive
Measuring range: 300 ... 1200hPa
Resolution: 0.1hPa
Accuracy: +/- 1.5hPa
Sampling rate: 10sec
Unit: hPa