| Description |
Sensor type |
3-cup anemometer |
| Sensor range |
1 m/s to 96 m/s (2.2 mph to 215 mph) (highest tested) |
| Instrument compatibility |
all NRG Systems data loggers |
| Applications |
• wind resource assessment
• meteorological studies
• Li-Cor #200SZ pyranometer
• environmental monitoring |
| Output Signal |
Signal type |
low level AC sine wave, frequency linearly proportional to wind speed |
Anemometer transfer
function |
• refer to individual calibration report for anemometer
transfer function
• all NRG Class 1 anemometers are calibrated per
IEC 61400-12-1, Annex F |
Output voltage at
threshold |
80 mV (peak-to-peak) minimum |
| Output voltage at 60 Hz |
• 12 V (peak-to-peak) typical
• output amplitude NOT proportional to wind speed |
| Calibration |
individually calibrated, calibration report provided via electronic download |
| Output signal range |
0 Hz to 125 Hz |
| Uncertainty |
IEC 61400-12-1 Classification
• Class 1.01A
• Class 8.44B
IEC 61400-12-1 operational standard uncertainty
• ± 0.06 m/s at 10 m/s for Class A
• ± 0.49 m/s at 10 m/s for Class B
• refer to individual calibration report for information on calibration uncertainty |
Response
Characteristics |
Threshold |
0.79 m/s (1.77 mph) per ASTM D 5096-02 |
| Swept diameter of rotor |
190 mm (7.5 in) |
| Distance constant |
• 2.36 m (7.74 ft) at 5 m/s per ASTM D 5096-02
• 2.28 m (7.48 ft) at 10 m/s per ASTM D 5096-02 |
| Moment of inertia |
• 1.01 x 10-4 kg-m2
• 74.5 x 10-6 S-ft2 |
| Installation |
Mounting |
Onto a 13 mm (0.5 in) diameter mast with cotter pin and set screw |
| Tools required |
0.25 in nut driver, petroleum jelly, electrical tape |
| Environmental |
Operating temperature
range |
-55 °C to 60 °C (-67 °F to 140 °F) |
Operating humidity
range |
0% to 100% RH |
| Materials |
Cups |
one piece injection-molded black polycarbonate |
| Body |
black ABS plastic |
| Shaft |
hardened 400 series stainless steel |
| Bearing |
ball bearings |
| Magnet |
Indox 1, 25 mm (1 in) diameter, 13 mm (0.5 in) long, 4 poles |
| Coil |
single coil, bobbin wound, 4100 turns of #40 wire, shielded
for ESD protection |
| Boot |
protective PVC sensor terminal boot included |
| Terminals |
brass |
| Physical |
Connections |
4-40 brass hex nut/post terminals |
| Weight |
0.14 kg (0.3 lbs) |
| Dimensions |
• 3 cups of conical cross-section, 51 mm (2 in) diameter
• 81 mm (3.2 in) overall assembly height |
