CSAT3

• CE compliant
• Measurement Path Length:
  10.0 cm vertical; 5.8 cm horizontal
• Path Angle from Horizontal: 60°
• Transducer Diameter: 0.64 cm
• Transducer Mounting Arms Diameter: 0.84 cm
• Support Arms Diameter: 1.59 cm 
• Anemometer Head Dimensions:
  47.3 cm (l) x 42.4 cm (h)
• Electronics Box Dimensions:
  26 x 16 x 9 cm
• Anemometer Head Weight:
  1.7 kg (3.7 lb)
• Electronics Box Weight:
  3.8 kg (8.4 lb)
• Construction: Sealed sonic transducers and electronics
• Anemometer Head Materials: stainless steel tubing
• Electronics Box Materials: cast aluminum
• Operating Temperature:
  -30° to +50°C
• Voltage Supply: 10 to 16 Vdc

Current

• 60 Hz Measurement Rate: 200 mA
• 20 Hz Measurement Rate: 100 mA

Measurements

• Outputs^a: u_x, u_y, u_z, c
• Speed of Sound: Determined from three acoustic paths; corrected for crosswind effects
• Measurement Rate: programmable from 1 to 60 Hz, instantaneous measurements; two over-sampled modes are block averaged to either 20 Hz or 10 Hz
• Measurement Resolution^b: u_x, u_y: 1 mm/s rms
  u_z: 0.5 mm/s rms
  c: 15 mm/s (0.025°C) rms
• Offset Error^c:
  < ±8.0 cm/s (u_x, u_y);
  < ±4.0 cm/s (u_z)
• Gain Error^c:
  < ±2% of reading (wind vector within ±5° of horizontal);
  < ±3% of reading (wind vector within ±10° of horizontal);
  < ±6% of reading (wind vector within ±20° of horizontal)
• Rain: Innovative ultrasonic signal processing and user-installable wicks considerably improve the performance of the anemometer under all rain events

Output Signals

• Digital SDM: CSI 33.3 k baud serial interface for datalogger/
  sensor communication. Data type is 2-byte integer per output plus 2-byte diagnostic
• Digital RS-232
  Baud Rate: 9600, 19200 bps
  Data Type: 2-byte integer per output plus 2-byte diagnostic

Analog

• Number of Outputs: 4
• Voltage Range: ±5 V
• Number of Bits: 12

SDM and RS-232 Digital Outputs Reporting Range

• Full Scale Wind: ±65.535 m/s autoranging between four ranges; least significant bit is 0.25 to 2 mm/s
• Speed of Sound: 300 to 366 m/s (-50° to +60°C); least significant bit is 1 mm/s (0.002°C)

Analog Outputs Reporting Range

• u_x: ±30 m s^-1, ±60 m s^-1
• u_y: ±30 m s^-1, ±60 m s^-1
• u_z: ±8 m s^-1
• c: 300 to 366 m s^-1 (-50° to +60°C)

Analog Outputs LSB

• u_x: 15 mm s^-1, 30 mm s^-1
• u_y: 15 mm s^-1, 30 mm s^-1
• u_z: ±8 m s^-1
• c: 16 mm s^-1 (0.026°C)

a - u_x, u_y, u_z are wind components referenced to the anemometer axes; c is speed of sound.

b - Resolution values are for instantaneous measurements made on a constant signal; noise is not affected by sample rate.

c - Offset error and gain error values assume the -30° to +50°C range, wind speeds of < 30 m/s, and wind angles between ±170°.