With the help of a potentiometer the physical property is converted into an analogue resistor output signal. At zero the transducer has to pass the „north transition“ between the margins of zero and 2 kΩ.
Wind direction signal conditioning and data processing in all Ammonit data acquisition systems carefully pays attention to this speciality.
The wind vane can be equipped with an electronically regulated heating system in order to prevent ice from the bearings. To use this heating the connection cable must have additional cores and you should provide a sufficient power supply (mains connection).
| Characteristic | Description / Value |
|---|---|
| Measuring range | 0 ... 360° |
| Measuring accuracy | ± 2° |
| Survival speed | max. 80 m/s, 30 min |
| Ambient temperature | -40 ... +70 °C |
| Measurement principle | Potentiometer 2 kΩ |
| Resolution | 0.5° |
| Starting threshold | ≤ 1 m/s according to ASTM-Standards D5366-96 ≤ 0.4 m/s according to VDI-Standard 3786 Part 2 |
| Delay distance | < 2.5 m acc. ASTM D 5366-96 |
| Electrical supply Potentiometer |
Voltage Us: 0 ... 24 VDC Important: The supply voltage of the potentiometer must show a current limitation of max. 1 mA. An additional protective resistance is strongly recommended. Resistor Rv: 15 kΩ @ supply voltage: 12 ... 15 V |
| Heating | 24 VDC/AC (Power consumption: max. 20 W) |
| Connection | 7-pole plug |
| Mast fixture | Mounted on a steel tube with an inner thread of PG21 or mounted on a traverse with a drill of 29 mm |
| Material | Aluminum, stainless steel and plastic (Housing and wind vane) |
| Type of ball bearings | Metallic ball bearings |
| Protection | IP 55 |
| Weight | approx. 0.4 kg |
| Manufacturer | Thies |
| Sensor | Plug Pin No. | Ammonit Cable Wire Color* |
Meteo-40 Digital | Supply Sensor |
|---|---|---|---|---|
| Wind Direction Data | 3 | white | IN | |
| Clock | 4 | blue | CLK | |
| Supply | 1 | red | 12 V | |
| Ground | 2 | black | Main Ground | |
| Heating | 5 | orange, orange |
24 V AC/DC | |
| 6 | violet, violet |
Cable type without heating: LiYCY 4 x 0.25 mm²
Cable type with heating wires: LiYCY 8 x 0.25 mm²
Connect the shield logger-sided to Ground (GND)