Optically-scanned cup anemometer
Thies First Class Advanced gives outstanding performance. The sensor has been classified acc. to IEC 61400-12-1 Edition 2.0. It gives optimal dynamic performance with the following characteristics:
The sensor is designed for measuring the horizontal wind velocity in the field of meteorology, climate research, site assessment, and the measurement of capacity characteristics of wind power systems (power curves). The patented design is the result of long testing in the wind tunnel. The sensor features dynamic behaviour also at high turbulence intensity, minimal overspeeding, and a low starting values. It requires only low maintenance thanks to its low-inertia and ball-bearing cup star. The anemometer is equipped with electronically regulated heating to guarantee smooth running of the ball bearings and prevent icing of shaft and slot during winter operation.
|
Characteristics |
|
|---|---|
|
Physical functionality |
Optically-scanned cup anemometer |
|
Delivered signal |
Frequency output (pulse) |
|
Accuracy |
0.3 ... 50 m/s 1% of meas. value or < 0.2 m/s |
|
Linearity |
Correlation factor r between frequency f and wind speed y y = 0.0462 × f + 0.21 typical r > 0.999 99 (4 ... 20 m/s) |
|
Starting velocity |
< 0.3 m/s |
|
Resolution |
0.05 m wind run |
|
Distance constant |
< 3 m (acc. to ASTM D 5096 - 96) 3 m acc. to ISO 17713-1 |
| Turbulent flow | Deviation Δv turbulent compared with stationary horizontal flow -0.5 % < Δv < +2 % Frequency < 2 Hz |
| Inclined flow - mean deviation from cosinus line - Turbulence effect |
< 0.1 % (in range of ±20°) < 1 % (in the range up to 30% turbulence intensity) |
|
Wind load |
Approx. 100 N @ 75 m/s |
|
Operating range |
|
|
Measuring range |
0.3 ... 75 m/s |
|
Survival speed |
80 m/s (mind. 30 min) |
|
Permissible ambient conditions |
-50 ... +80 °C, all occuring situations of relative humidity |
|
Electrical data |
|
|
Output signal |
Form rectangle, 1082 Hz @ 50 m/s, supply voltage max. 15 V |
|
Electrical supply for optoelec. scanning |
Voltage: 3.3 ... 48 VDC (galvanic isolation from housing) Current: 0.3 mA @ 3.3 V (w/o external load) < 0.5 mA @ 5 V (w/o external load) |
|
Electrical supply for heating |
Voltage: 24 V AC/DC (galvanic isolation from housing) Idling voltage: max. 30 V AC, max. 48 VDC Power consumption: 25 W |
|
General |
|
|
Connection |
8-pole plug-connection for shielded cable in the shaft |
|
Mounting |
on mast tube R1” |
|
Dimensions |
290 x 240 mm |
|
Fixing boring |
35 x 25 mm |
|
Weight |
approx. 0.5 kg |
|
Material Housing Cup star |
Anodised aluminiun Carbon-fibre-reinforced plastic |
|
Type of bearings |
Metallic ball bearings |
|
Protection |
IP 55 (DIN 40050) |
|
Patent |
EP 1 398 637 DE 103 27 632 EP 1 489 427 |
|
EMC |
EN 61000-6-2:2001 (immunity) EN 55022:2001, Class B (interfering transmission) |
|
Manufacturer |
Thies |
