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Module 2 kênh giao diện dây rung 900MHz Campbell Scientific AVW206

Module 2 kênh giao diện dây rung 900MHz Campbell Scientific AVW206

  • Mã sản phẩm :
  • AVW206
  • Liên hệ
    • Còn 100sp tại 847 Huyền Kỳ, Phường Phú Lãm,
  • Thông tin chi tiết :
  • Chọn số lượng
  • Mua Ngay
  • Thương hiệu
  • Campbell Scientific
Module 2 kênh giao diện dây rung 900MHz Campbell Scientific AVW206

The AVW206 is a vibrating-wire analyzer module that includes an internal 910- to 918-MHz spread-spectrum radio for wireless communication. The internal radio's frequency range is used in the U.S. and Canada. This vibrating-wire analyzer module allows our dataloggers to measure vibrating-wire strain gages, pressure transducers, piezometers, tiltmeters, crackmeters, and load cells. These sensors are used in a wide variety of structural, hydrological, and geotechnical applications because of their stability, accuracy, and durability.
The AVW206 uses vibrating-wire spectral-analysis technology (VSPECT™). VSPECT observes the incoming sensor signal, performs a Fourier transform and a spectral analysis (transforming the time series into indivdual sinusoidal components in the frequency spectrum), and determines the sensor frequency by identifying the largest signal in the acceptable range and disregarding noise.
Benefits and Features
  • Provides better measurements by significantly reducing incorrect readings caused by noise sources
  • Interfaces two vibrating-wire sensors; more sensors may be connected if an AM16/32B multiplexer is used
  • Self-checking diagnostics give continual feedback on sensor condition
  • High resolution—less than 0.001 Hz (industry standard is 0.1 Hz)
  • Low current drain
  • Remote, wireless operation with on-board radio
  • Interfaces both temperature and frequency measurements from vibrating-wire sensors

Detailed Description

The AVW206 uses an innovative spectral-interpolation method for measuring the sensor’s resonant frequency. With the spectral interpolation method, the module excites the vibrating-wire sensor, measures the response, performs a Fourier transform on the response, and returns the result with a resolution better than 0.001 Hz—all within two seconds. Because spectral analysis can distinguish signal from noise on the basis of frequency content, this method offers improved immunity to competing noise.
The AVW206 analyzer module also provides many self-checking diagnostics such as vibrating-element signal strength, signal-to-noise ratio, vibrating-element signal decay ratio, and incorrect signal response. These diagnostics can be running in the background to give continual feedback of the condition for each sensor.
The AVW206 typically transmits its data to an RF401 spread-spectrum radio that is connected to the datalogger. The AVW206 can also be connected directly to the datalogger.



Internal Radio Frequency Range 910 to 918 MHz
Radio Power 250 mW
Older AVW206 modules (serial # < 11224) have 100 mW radios.
Number of Vibrating-Wire Sensors Measured Up to 2 vibrating-wire sensors can be connected to the analyzer module. Additional sensors can be measured by using an AM16/32-series multiplexer.
Power Requirements 9.6 to 16 Vdc
Analog Input/Outputs 2 differential (DF) vibrating-wire measurements (V+ and V-) and 2 single-ended (SE) ratiometric resistive half-bridge measurements (T+ and T-) for vibrating-wire sensor's onboard temperature sensor.
Digital Control Ports 3 digital control ports (C1 – C3)
  • C1 functions as an SDI-12 I/O communication port.
  • C2 functions as a Clk output for multiplexer control.
  • C3 functions as a reset output for multiplexer control.
RS-232 Port 1 9-pin RS-232 port (for connecting to a datalogger COM port)
Measurement Resolution 0.001 Hz RMS (±250 mV differential input range; -55° to +85°C)
Measurement Accuracy ±0.013% of reading (±250 mV differential input range; -55° to +85°C)
Input Range ±25 V
Baud Rates Selectable from 1200 to 38.4 kbps (ASCII protocol is one start bit, one stop bit, eight data bits, and no parity.)
  • Either 128 or 512 kB of SRAM
  • 2 MB of OS Flash
CE Compliance Standards to which Conformity Is Declared IEC61326:2002
Dimensions 21.6 x 11.18 x 3.18 cm (8.5 x 4.5 x 1.2 in.)
Weight 0.43 kg (0.95 lb)

Typical Current Drain @ 12 Vdc

Quiescent, Radio Off ~0.3 mA
Radio Duty Cycling 1 s ~3 mA (includes quiescent current)
Radio Always On ~26 mA
Active RS-232 Communication ~6 mA
Measurement ~25 mA



The AVW206 Vibrating-Wire Spectrum Analyzer Module allows our dataloggers to measure vibrating-wire strain gages, pressure transducers, piezometers, tiltmeters, crackmeters, and load cells.


The AVW206's internal spread spectrum radio can transmit data to an RF401A, RF401, or RF430. The AVW206 does not have a transparent mode, and therefore its internal radio cannot communicate with an RF400 radio.

Datalogger Considerations

Compatible Contemporary Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR9000X
  Description: Description: Description:  

Compatible Retired Dataloggers

CR500 CR510 CR10 CR10X 21X CR23X CR5000 CR7X CR9000
    Description:* Description:*   Description:* Description:*    
Datalogger Notes:
*The CR5000, CR10(X), and CR23X support the SDI-12 mode only.

Enclosure Considerations

The AVW206 requires a desiccated, non-condensing environment. A Campbell Scientific enclosure is recommended when the analyzer module is in the field. The AVW206 has built-in keyhole flanges for mounting to an enclosure backplate.

Compatible Enclosures

ENC10/12 ENC10/12R ENC12/14 ENC14/16 ENC16/18 ENC24/30 ENC24/30S
Description: Description: Description: Description: Description: Description: Description:
Enclosure Notes:
#If using the RS-232 port, the AVW206 must be mounted flat to fit in an ENC10/12, ENC10/12R, or ENC12/14.

Power Considerations

The AVW206 is typically powered by the datalogger's power supply.

Operating System Considerations

Newer modules with 250 mW radios must use OS 5 or higher for their operating system.  


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