Ammonit's standard is heated version. It can be used for both heated and non-heated system.
The wind vane serves for the detection of the horizontal wind direction in the field of meteorology and environmental protection. The axis of the wind vane is running in ball bearings and carries a diametrically magnetized magnet at the inner end. The angle position of the axis is scanned contact-free by a magnetic angle sensor (TMR-Sensor, Tunnel Magneto Resistance) through the position of the magnet field. As the sensor is operated the magnetic saturation, effects by external magnetic fields can almost be eliminated. The connected electronics calculated the angle position of the axis and provides the respective serial-synchronous output signal.
| Characteristic | Description / Value |
|---|---|
| Measurement principle | Magnetic |
| Measurement range | 0 ... 360° |
| Accuracy | ± 0.75° |
| Resolution | 0.35° |
| Survival speed | max. 85 m/s, 30 min |
| Starting threshold | < 0.5 m/s at 10° amplitude (acc. to ASTM D 5366-96) < 0.2 m/s at 90° amplitude (acc. to VDI 3786 Part 2) |
| Delay distance | < 1.8 m (acc. to ASTM D 5366-96) |
| Damping ratio | D > 0.3 (acc. to ASTM D 5366-96) |
| Quality factor | K > 1 |
| Output | 10-bit serial-synchronous (compatible with Ammonit Meteo-40 data loggers) |
| Operating voltage | 3.3 ... 42 VDC |
| Operating voltage heating | 24 V DC/AC, 45 ... 65 Hz (galvanically isolated from housing), max. 25 W |
| Ambient temperature | -50 ... +80 °C |
| Connection | 8-pole plug connection for shielded cable in the shaft |
| Mounting | Mounting on mast 1” (DIN EN 10255; 1”= Ø 33.4 mm) 1 ½” with separate adapter (optional) |
| Material | Aluminum |
| Type of ball bearings | Metallic ball bearings |
| Weight | approx. 0.7 kg |
| Protection | IP 55 |
| Manufacturer | Thies |
| Sensor | Plug Pin No. | Ammonit Cable Wire Color* |
Meteo-40 Digital | Supply Sensor |
|---|---|---|---|---|
| Wind Direction Data | 5 | white | IN | |
| Clock | 4 | blue | CLK | |
| Supply | 3 | red | 9 ... 36 V* | |
| Ground | 2 | black | Main Ground | |
| Heating | 7 | orange, orange | 24 V AC/DC | |
| 8 | violet, violet |
* Supply voltage for usage with Meteo-40 data loggers.
Cable type without heating: LiYCY 4 x 0.25 mm²
Cable type with heating wires: LiYCY 8 x 0.25 mm²