CSAT3BH Beheizbares 3D-Ultraschall-Anemometer
Ultraschall-Anemometer mit smarter Heizung
Verlässliche Daten über das ganze Jahr, auch in kaltem Klima
wetter wasser energie gas flux and turbulence bauwerke boden

Überblick

Das CSAT3BH ist ideal für Flux Kunden, die Stationen in kalten Klimazonen betreibenen. Seine smarte Heizung liefert genau die Wärme, die nötig ist, um den Sensor frei von Eis und Schnee zu halten, so dass das ganze Jahr über verlässlich gute Daten erhalten werden können, auch in kalten Gebieten.

Das CSAT3BH kann die Heizleistung regulieren — im Gegensatz zum typischen an/aus. Außerdem werden in den Daten Flags gesetzt, um zu kennzeichnen, wann die Heizung eingeschaltet war, ein Vorteil beim Post-Processing der Daten.

Design und Messprinzip des CSAT3BH sind dasselbe wie beim CSAT3B 3-D Ultraschall-Anemometer mit integrierter Elektronik. Die Spezifikationen des CSAT3BH sind dieselben wie beim CSAT3B in Hinsicht auf die Windmessungen. 

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Funktionen und Vorteile

  • Neuartige Beschichtung schützt die Transducer in korrosiver Umgebung
  • Zwei- Zonen Heizung verhindern Anlagerung von SChnee und Eis an an Transducern und Gehäuse des Sensors
  • Heizungssteuerung verwendet Temperatur- und RH Daten für Leistungsanpassung
  • Integrierte Heizung sorgt für perfekt Ultraschall- Aerodynamik
  • Integrierte Markierung der Daten wenn die Heizung arbeitet

Bilder

CSAT3BH with snow
CSAT3BH with snow
CSAT3BH with snow
CSAT3BH
CSAT3BH Heated Controller
Connectors on the CSAT3H Heater Controller
Exploded view of the CSAT3BH boom
CSAT3BH with lit status light
CSAT3BH system (items sold separately)

Technische Beschreibung

The CSAT3BH provides integrated two-zone smart heating: 

  • Zone 1 consists of the arms and strut.
  • Zone 2 provides heating to all the transducers.

The smart heating uses environmental conditions and a controller to apply variable heating to the sonic anemometer to keep the body and transducers free of ice and snow. The CSAT3BH is designed to prevent ice from forming on the arms and fingers of the system. The block has no heating in it. The CSAT3BH has a separate controller that is used to control the heating algorithm of the sensor. The controller requires a temperature/RH input. There is an ambient temperature and relative humidity sensor that is standard for use with the controller, or the data can be provided through a user-supplied temperature/RH sensor.

Physical

The CSAT3BH controller is a polycarbonate enclosure sized 20.32 x 25.4 x 15.24 cm (8 x 10 x 6 in.). The enclosure uses military connectors for incoming power, heaters, temperature sensors, temperature/RH, RS-485(2), and USB.

Electrical

The heaters are controlled on two zones and require 150 W at full power. The controller controls the heaters by increasing or decreasing the voltage to get the appropriate wattage to keep ice from forming on the sensor.

Spezifikationen

Sensor 3-dimensional sonic anemometer
Measurement Description Highest-quality wind speed and direction
Operating Temperature Range -40 to +50°C (equivalent to 305 to 368 m s-1 in speed of sound)
Outputs ux, uy, uz, Ts (ux, uy, uz are wind components referenced to the anemometer axes; Ts is sonic temperature in degrees Celsius.)
Speed of Sound Determined from three acoustic paths. (Corrected for crosswind effects.)
Wind Direction Range 2.5 to 357.5° in CSAT3B coordinate system (0 to 360° customized)
Filter Bandwidths 5, 10, 20, or 25 Hz
Measurement Path Length 10.0 cm (3.9 in.) vertical; 5.8 cm (2.3 in.) horizontal
Transducer Angle from Horizontal 60 degrees
Transducer Diameter 0.64 cm (0.25 in.)
Transducer Mounting Arm Diameter 0.84 cm (0.33 in.)
Support Arm Diameter 1.59 cm (0.63 in.)
Anemometer Head Weight 1.9 kg (4.2 lb)
Anemometer Dimensions 63.1 x 12.3 x 43.3 cm (24.8 x 4.9 x 17.0 in.)

Power Requirements

Anemometer Voltage Requirement 9.5 to 32 Vdc
Current Required for 10 Hz Measurement Rate
  • 110 mA (@ 12 Vdc)
  • 65 mA (@ 24 Vdc)
Current Required for 100 Hz Measurement Rate
  • 145 mA (@ 12 Vdc)
  • 80 mA (@ 24 Vdc)
Heaters 6.2 A (@ 24 Vdc)
Arms and Strut
  • 0.74 A nominal (@ 24 Vdc)
  • 2.46 A at maximum heating (@ 24 Vdc)
Transducer Fingers
  • 1.13 A nominal (@ 24 Vdc)
  • 3.75 A at maximum heating (@ 24 Vdc)
Total System Power
  • 1.86 A nominal (@ 24 Vdc)
  • 6.2 A at maximum heating (@ 24 Vdc)
Controller Current Required 30 mA (heaters off [quiescent] @ 24 Vdc)

Wind Accuracy

-NOTE- Accuracy specifications assume the following:
  • -40° to +50°C operating range
  • Wind speeds < 30 m s-1
  • Wind angles between ±170°
Maximum Offset Error < ±8.0 cm s-1 (ux, uy), < ±4.0 cm s-1 (uz)
Maximum Gain Error
  • < ±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)

Measurement Resolution

ux, uy 1 mm s-1 RMS
uz 0.5 mm s-1 RMS
Ts 0.002°C RMS (at 25°C)
Wind Direction < 0.058° (ux = uy ≤ 1 m s-1)

Measurement Rates

Data Logger Triggered 1 to 100 Hz
Unprompted Output (to PC) 10, 20, 50, or 100 Hz
Internal Self-Trigger Rate 100 Hz

Measurement Delay

Data Logger Triggered (no filter) 1 trigger period (1 scan interval)
Unprompted Output (no filter) 10 ms
Filtered Output (data-logger-prompted or unprompted to PC)
  • 795 ms (with 5 Hz bandwidth filter)
  • 395 ms (with 10 Hz bandwidth filter)
  • 195 ms (with 20 Hz bandwidth filter)
  • 155 ms (with 25 Hz bandwidth filter)

Internal Monitor Measurements

Update Rate 2 Hz
Inclinometer Accuracy ±1°
Relative Humidity Accuracy
  • ±3% (over 10 to 90% range)
  • ±7% (over 0 to 10% range)
  • ±7% (over 90 to 100% range)
Board Temperature Accuracy ±2°C

SDM

-NOTE- Used for data-logger-based data acquisition.
Bit Period 10 µs to 1 ms
Cable Length
  • 7.6 m (25 ft) max (@ 10 µs bit period)
  • 76 m (250 ft) max (@ 1 ms bit period)
Address Range 1 to 14
Bus Clocks per Sample ~200

CPI

-NOTE- Used for data-logger-based data acquisition.
Baud Rate 50 kbps to 1 Mbps
Cable Length
  • 15 m (50 ft) max (@ 1 Mbps)
  • 122 m (400 ft) max (@ 250 kbps)
  • 853 m (2800 ft) max (@ 50 kbps)
Address Range 1 to 120
Bus Clocks per Sample ~300

RS-485

-NOTE- Used for anemometer configuration or PC-based data acquisition.
Baud Rate 9.6 kbps to 115.2 kbps
Cable Length
  • 305 m (1000 ft) max (@ 115.2 kbps)
  • 610 m (2000 ft) max (@ 9.6 kbps)
Bus Clocks per Sample ~500 (ASCII formatted)

USB

-NOTE- Used for anemometer configuration or PC-based data acquisition.
Connection Speed USB 2.0 full speed 12 Mbps
Cable Length 5 m (16.4 ft) maximum

Kompatibel mit

Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

Datenlogger

Product Compatible Note
CR1000 (retired)
CR1000X
CR200X (retired)
CR216X (retired)
CR3000
CR6
CR800
CR850
CR9000X (retired)

Miscellaneous

Product Compatible Note
CR310 (retired)

Downloads

CSAT3BH CR1000X Programs v.2.03 (9 KB) 20-11-2020

CR1000X datalogger programs for the CSAT3BH with SDM and CPI communications protocols. 

Warning: This program is not intended for the CSAT3H Heater Controller Enclosure. Please contact Campbell Scientific for any questions regarding the CSAT3H Heater Controller program.


CSAT3BH CR6 Programs v.2.03 (9 KB) 20-11-2020

CR6 datalogger programs for the CSAT3BH with SDM and CPI communications protocols. 

Warning: This program is not intended for the CSAT3H Heater Controller Enclosure. Please contact Campbell Scientific for any questions regarding the CSAT3H Heater Controller program.


CSAT3B OS v.3.02 (548 KB) 14-10-2019

Current CSAT3B Operating System.

Liste der Änderungen

CSAT3H Heater Controller v.14.2 (46 KB) 02-02-2021

The CSAT3H Heater Controller ships with this encrypted program. This program is for the unlikely event that the program needs to be re-installed or updated to a newer version. Please contact Campbell Scientific if you have questions about the program or would like the algorithm modified for a specific application.

FAQs für

Number of FAQs related to CSAT3BH: 17

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  1. When the heaters are on, a flag is sent to the data logger to help the user determine if the heaters have an effect on the data.

  2. The heaters can be controlled manually only through a programming change of the CR300 Datalogger used to control the heaters.

  3. Campbell Scientific does not offer any mounting booms or hardware that enable easy and frequent positioning of the sonic anemometer sensor head. This type of hardware must be provided by the user.

  4. The sonic anemometer offset specification is ±8 cm/s. Therefore, it cannot be used in an application where the expected wind speed is in the range of ±5 cm/s.

  5. Ultrasonic anemometers are unable to make measurements if the sonic path is blocked. The path may become blocked by water that puddles on the lower transducer face or droplets that hang from the upper transducers. Sonic wicks, which come with all sonics, can be placed on the transducers to wick away moisture from the faces of the transducers. Ensure that these wicks are removed during cold conditions to prevent ice from building up around them.

  6. The sonic anemometer measures three-dimensional wind in a right-handed Cartesian coordinate system. From these measurements, use trigonometry to compute the wind flow angle, horizontal angle, and wind speed.

  7. No. The sonic anemometer does not report time with the wind measurements. A time stamp will be assigned to the wind data by the data-acquisition system—either a data logger or a PC.

  8. Yes. If the matching layer is damaged or missing, return the sonic anemometer to the factory for repair. Follow the steps listed on our Repair and Calibration page to request a returned material authorization (RMA) number. 

  9. The CSAT3A, CSAT3AH, CSAT3B, and CSAT3BH are calibrated over temperature for the effects of transducer delays on the wind speed, and to a lesser extent, for the speed of sound measurements.

    There is no NIST-traceable standard for ultrasonic anemometers.

  10. No. The offset is a function of temperature and time. Once a year, spot-check the sonic anemometer wind offset using the procedure outlined in the CSAT3B instruction manual. If the measured offset is outside the specification, return the sensor to the factory for calibration. To request a returned material authorization (RMA) number, follow the steps listed on our Repair and Calibration page.