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Acoustic Wave And Current Profiler (AWAC)

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Acoustic Wave And Current Profiler (AWAC)

    With the Nortek AWAC, you get a current profiler and a wave directional system in one unit. You can measure the current speed and direction in 1-meter thick layers from the bottom to the surface. Waves of all varieties are measureable; this includes long waves, storm waves, short wind waves, or transient waves generated by local ship traffic.
    • 400 kHz version of the AWAC
    • ProLog Internal Processor
    • Special ice detection algorithm
    • Improved pressure sensor
    • SeaState 2.0 for online data collection

    System
    • Acoustic frequency:
    1MHz, 600kHz or 400kHz
    • Acoustic beams:
    4 beams, one vertical, three slanted at 25°
    • Vertical beam opening angle:
    1.7°
    • Operational modes:
    Stand-alone or online monitoring
    Current Profile
    • Maximum range:
    30m (1MHz), 50m (600 kHz), 100m (400kHz) (depends on local conditions)
    • Depth cell size:
    0.25 – 4.0m (1MHz), 0.5 – 8.0m (600kHz), 1.0 – 8.0m (400kHz)
    • Number of cells:
    Typical 20–40, max. 128
    • Maximum output rate:
    1Hz
    Velocity measurements
    • Velocity Range :
    ±10 m/s horizontal, ±5 m/s along beam >
    • Accuracy:
    1% of measured value ±0.5 cm/s
    Doppler uncertainty
    • Current profile:
    1cm/s (typical)
    Wave measurements
    • Maximum depth:
    35m (1MHz), 60m (600 kHz), 100m (400kHz)
    • Data types:
    Pressure, one velocity along each beam, AST*
    • Sampling rate (output):
    2 Hz velocity, 4 Hz AST* (1MHz), 1 Hz velocity, 2Hz AST* (600kHz), 0.75 Hz velocity, 1.5Hz AST* (400kHz)
    • No. of samples per burst:
    512, 1024, or 2048. Inquire for options
    Wave estimates
    • Range:
    -15 to +15m
    • Accuracy/resolution (Hs):
    <1% of measured value/1cm
    • Accuracy/resolution (Dir):
    2º / 0.1º
    • Period range:
    0.5-100s (1MHz), 1 – 100s (0.6MHz), 1.5 – 100s (0.4MHz)
    Depth(m) cut-off period (Hs)     cut-off period (dir)
    • 5
    0.5 sec     1.5 sec
    • 20
    0.9 sec     3.1 sec
    • 60
    1.5 sec     4.2 sec
    • 100
    2 sec     5.0 sec
    Sensors
    • Temperature:
    Thermistor embedded in housing
    • Range:
    –4°C to 40°C
    • Accuracy/ Resolution:
    0.1°C/0.01°C
    • Time constant:
    • Compass :
    Magnetoresistive
    • Accuracy/Resolution:
    2°/0.1° for tilt <15°
    • Tilt:
    Liquid level
    • Maximum tilt:
    30°, AST* requires <10° instrument tilt
    • Up or down:
    Automatic detect
    • Pressure:
    Piezoresistive
    • Standard range:
    0–50 m (1MHz) / 0-100m (0.6MHz) / 0-100m (0,4MHz)
    • Accuracy:
    0.5% of full scale. Optional 0.1% of full scale.
    • Resolution:
    0.005% of full scale
    Transducer configurations
    • Standard:
    3 beams 120º apart, one vertical
    • Platform mount:
    3 beams 90º apart, one at 5°
    Materials
    • Standard:
    Delrin and polyurethane plastics with titanium screws
    Connectors:
    • Bulkhead (Impulse):
    MCBH-2-FS
    • Cable:
    PMCIL-8-MP
    Environmental
    • Operating temperature:
    –4°C to 40°C
    • Storage temperature:
    –20°C to 60°C
    • Shock and vibration:
    IEC 721–3–2
    • Depth rating:
    300m
    Dimensions:
    • Weight in air:
    7.3 kg (0.4MHz), 6.2 kg (0.6MHz), 6.1 kg (1MHz)
    • Weight in water:
    3.6 kg (0.4MHz), 2.9 kg (0.6MHz & 1MHz)
    Analog Inputs
    • Number of channels:
    2
    • Supply voltage to analog output devices:
    Three options selectable through firmware commands: • Battery voltage/500mA • +5V/250mA • +12V/100mA
    • Voltage Input:
    0-5V
    • Resolution:
    16 bit A/D
    Data Recording
    • Capacity(standard):
    2 MB, can add: 32/176/352MB or 4GB
    • Profile record:
    Ncells×9 + 120
    • Wave record:
    Nsamples×24 + 1KB
    Data Communication
    • I/O:
    RS 232 or RS 422
    • Communication baud rate:
    300–115200
    • Recorder download baud rate:
    600/1200 kBaud for both RS232 and RS422
    • User control:
    Handled via «AWAC» software, or ActiveX® controls. «SeaState» for online systems.
    • ProLog:
    Provides NMEA ASCII or Binary output formats for processed wave and current data.
    Power
    • DC input:
    9-18 VDC
    • Peak current:
    3A
    • Power consumption:
    Transmit power: 1–30W, 3 adjustable levels
    • Sleep consumption:
    0.3 mW (RS232) 5 mW (RS422)
    Real time clock
    • Accuracy:
    ± 1min/year
    • Backup in absence of power:
    1 year
    Offshore Cable
    The Nortek offshore cable can, when properly deployed, withstand tough conditions in the coastal zone. In RS 422 configuration, cable communication can achieved distances up to 5 km.
    Online Projects
    Nortek can provide long cables, radio/telephone communication equipment, acoustic modems, etc., that can meet the requirements of your specific project.

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