RETIRED ›
该产品不再可用，已取代：CSAT3B。
CSAT3 3-D音速计
可用的服务
修理 是的
Calibration 是的
Free Support 是的

Overview

CSAT3是一个三维的声音气压计，可测量三个正交风组件和声音速度。在涡流协方差系统中，它可以测量水平和垂直风的湍流波动。然后，这些测量值用于计算动量通量和摩擦速​​度。这种声音气压计还可以提供平均水平风速和方向测量。CSAT3配备25英尺电缆。

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Benefits and Features

  • Provides precision turbulence measurements with minimal flow distortion
  • FW05 fine wire thermocouple (12.7 μm diameter) is available as an option for fast response temperature measurements
  • Withstands exposure to harsh weather conditions
  • 测量可用于计算动量通量和摩擦速​​度
  • 兼容的with most Campbell Scientific data loggers

Whenever possible, use the CSAT3B (the CSAT3's replacement) instead.

图片

Detailed Description

The CSAT3 has a 10 cm vertical measurement path and operates in a pulsed acoustic mode. The three orthogonal wind components (uX，，，，你y，，，，你z）and the speed of sound (c) are measured and output at a maximum rate of 60 Hz. Analog outputs and two types of digital outputs are provided.

可以从CSAT3的内部时钟，PC生成的RS-232命令或Data Logger的SDM命令触发测量。SDM协议支持用于同步多个CSAT3S的组触发器。

The FW05 fine wire thermocouple (12.7 μm diameter) is available as an option for fast response temperature measurements.

规格

Measurement Path Length
  • 10。0 cm (3.94 in.) vertical
  • 5.8 cm (2.28 in.) horizontal
Path Angle from Horizontal 60°
建造 Sealed sonic transducers and electronics
Anemometer Head Materials Stainless-steel tubing
电子盒材料 Cast aluminum
工作温度范围 -30°至 +50°C
电压供应 10to 16 Vdc
Current
  • 200 mA (60 Hz measurement rate)
  • 100 mA (20 Hz measurement rate)
Digital SDM Output Signal CSI 33.3 K BAUD串行接口，用于数据记录器/传感器通信。（数据类型为每个输出加2字节的整数加2字节诊断。）
Support Arm Diameter 1.59厘米（0.63英寸）
Transducer Diameter 0.64 cm (0.25 in.)
Transducer Mounting Fingers Diameter 0.84厘米（0.33英寸）
Cable Length 7.62 m（25英尺）
动态计头尺寸 47.3 x 42.4厘米（18.6 x 16.7英寸）
动态计头重 1.7 kg (3.7 lb)
电子盒尺寸 26 x 16 x 9 cm (10.24 x 6.3 x 3.54 in.)
Electronics Box Weight 3.8 kg (8.4 lb)

测量
输出 你X，，，，你y，，，，你z，，，，C
(uX，，，，你y，，，，你z是引用风速计轴的风组件；C是声音的速度。）
Speed of Sound 由三个声路径确定；纠正了侧风效应。
测量率 Programmable from 1 to 60 Hz, instantaneous measurements. Two over-sampled modes are block averaged to either 20 Hz or 10 Hz.
Measurement Resolution
  • 分辨率值是针对恒定信号进行的瞬时测量值；噪声不受采样率的影响。
  • 1 mm/s rms (uX，，，，你y）
  • 0.5 mm/s rms (uz）
  • 15 mm/s (0.025°C) rms (c)
  • 0.06° rms (wind direction)
Offset Error
  • Offset error and gain error values assume the -30° to +50°C range, wind speeds of < 30 m/s, and wind angles between ±170°.
  • <±8.0 cm/s（uX，，，，你y）
  • < ±4.0 cm/s (uz）
Gain Error
  • Offset error and gain error values assume the -30° to +50°C range, wind speeds of < 30 m/s, and wind angles between ±170°.
  • <±2％的读取（水平的±5°之内的风矢量）
  • <±3％的读数（水平的±10°之内的风矢量）
  • <±6％的读取（水平的±20°以内的风矢量）
Wind Direction Accuracy ±0.7° at 1 m/s (for horizontal wind)
Rain Innovative ultrasonic signal processing and user-installable wicks considerably improve the performance of the anemometer under all rain events.

Digital RS-232 Output Signal
Baud Rate 9600，19200 bps
Data Type 2-byte integer per output plus 2-byte diagnostic

类似物
Number of Outputs 4
Voltage Range ±5 v
Number of Bits 12

SDM & RS-232 Digital Outputs Reporting Range
Full-Scale Wind ±65.535 m/s在四个范围之间自动增压（最小显着的位为0.25至2 mm/s）。
Speed of Sound 300至366 m/s（-50°至 +60°C）的最低显着位为1 mm/s（0.002°C）。

模拟输出报告范围
你X ±30 m s-1，，，，±60 m s-1
你y ±30 m s-1，，，，±60 m s-1
你z ±8 m s-1
C 300 to 366 m s-1（-50至 +60°C）

类似物输出LSB
你X 15毫米-1，30毫米S-1
你y 15毫米-1，30毫米S-1
你z ±8 m s-1
C 16 mm s-1（0.026°C）

兼容性

笔记：The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

数据记录仪

产品 兼容的 笔记
21X（退休）
CR10（退休）
CR1000（退休）
CR10X（退休）
CR200X（退休）
CR206X（退休）
CR211X（退休）
CR216X（退休）
CR23X（退休）
CR295X（退休）
CR300
CR3000
CR500（退休）
CR5000（退休）
CR510（退休）
CR6
CR800
CR850
CR9000（退休）
CR9000X（退休）

Additional Compatibility Information

Data Logger Considerations

Required Operating Systems or PROMs
Data Logger Model Data Logger Operating System (OS)
or PROMs Required		 CSAT3OS Required
21X 1K 6145-3，6146-5，10006-1 2.1 or higher
21X 2K 6148-5, 6149-7, 6070-64 2.1 or higher
CR800，CR850 All OS 3.0 or higher
CR10 2 k 5954 - 396;
4K is a Library Special		 2.1 or higher
CR10X OS 1.4 or higher 2.1 or higher
CR1000 All OS 3.0 or higher
CR23X All OS 2.1 or higher
CR3000 All OS 3.0 or higher
CR5000 All OS 3.0 or higher
CR9000 2.01或更高 2.1 or higher
CR9000X All OS 2.1 or higher

Downloads

CSAT3（567 KB）03-24-1998

用于监视和配置CSAT3的PC支持软件。

经常问的问题

与CSAT3：10

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  1. Can the bubble level on the CSAT3/3A/3H be replaced?

    是的。The bubble level can be replaced in the field usingPN 31962，，，，带有安装保险杠和硬件的1环替换气泡电平。

  2. CSAT3/3A/3AH可以给出每个测量值的时间戳吗？

    No. The CSAT3/3A/3AH is a sensor. Time stamps are assigned to the sonic anemometer data by the data-acquisition system—typically a Campbell Scientific data logger or PC.

  3. What are the mounting options for the CSAT3?

    CSAT3可以使用随附的CM250升级安装套件安装在CM202，CM203，CM204或CM206 Crossarm的末端。或者，CSAT3可以使用3/8-16不锈钢螺栓安装在平坦的水平表面上。

  4. Are there any corrections to the raw data (not the average data) obtained by the CSAT3/3A/3AH?

    CSAT3/3A/3AH校准对温度延迟的换能器延迟进行了校正。传感器延迟会导致风速测量的抵消，并在较小程度上偏移声音测量速度。

    The CSAT3/3A/3AH speed of sound easement is corrected for the effects of wind blowing normal to the sonic path.

  5. Does the head of the CSAT3 need to be matched with its electronic box?

    是的。CSAT3电子设备包含独特的校准和传感器头几何信息。传感器头和电子设备是匹配的集合。（传感器头上的序列号必须匹配电子设备以进行有效的测量。）

  6. What should be done if the CSAT3/3A/3AH cannot be found in the Short Cut list of sensors?

    涡流应用中使用的传感器与SCWin。可以购买开放式涡流协调计划pn 18442，，，，CRBASIC BASIC EDDY协方差计划。这是没有能量平衡传感器的程序。也可用pn 18443，，，，CRBASIC扩展Eddy协方差计划，，，，with energy balance sensors. To order a custom configured program, contact the Micrometeorology Flux group for assistance.

  7. Is the CSAT3/3A/3AH only compatible with Campbell Scientific data loggers?

    The CSAT3/3A/3H is compatible with three output signals: analog, RS-232, and Synchronous Device for Measurement (SDM). The sonic anemometer can be interfaced to any data acquisition system that is compatible with analog measurements or RS-232 serial communications. SDM is used with Campbell Scientific data loggers.

  8. 使用CSAT3的长同步设备进行测量（SDM）电缆时，是否有任何数据记录程序编程更改必须对程序进行？

    有长长的电缆长度，监视从CSAT3收集的SDM数据。如果CSAT3诊断单词为61441或NAN，则存在SDM通信错误。如果SDM位周期增加，则应恢复SDM通信。使用SDMSpeed()指令改变SDM时期。使用following values for the listed data loggers:

    • CR3000：50
    • CR800，CR850或CR1000：100
    • CR5000：90
  9. What is the absolute accuracy of the speed of sound measurement in the CSAT3/3A/3AH?

    The CSAT3/3A/3AH should not be used to measure absolute sonic temperature. Aside from the effects of water vapor in the sonic path, the speed of sound measurement is highly dependent on the ability of the sonic anemometer to maintain its geometry. A 0.2 mm change in the sonic path is equal to a 1°C change in the measured absolute sonic temperature at 25°C. This is equal to a 0.33% error in the absolute sonic temperature. The wind speed measurements are also dependent on the sonic path distance, but to a lesser degree.

  10. How is sensible heat flux measured using a CSAT3/3A/3H and an FW05?

    Sensible heat flux is defined as the covariance of vertical wind and temperature fluctuations, measured with fast-response sensors. For more information, refer to a micrometeorology textbook.

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