









ACOUSTIC WAVE AND CURRENT PROFILER
AWAC - 1 MHz
Profil de courant et houle directionnelle en zone côtière
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Overview
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The AWAC 1 MHz ADCP has become the standard reference technology in submerged wave-measurement applications. Thousands of these ADCPs have been deployed to capture the full wave spectrum in combination with current profiles. With a 35 m maximum range for wave measurements and 4 Hz sampling of the surface elevation, the AWAC 1 MHz is the optimal tool for shallow current and wave measurements.
Highlights
- Mesure des profils de courant jusqu'à une portée de 30 m
- Mesure de la houle directionnelle jusqu'à une immersion de 35 m
- Tracking acoustique de la surface (AST) avec un faisceau vertical
- Peut être utilisé sur des structures fixes ou des bouées de subsurface
Applications
- Mesure temps réel du courant et de la houle
- Aménagement de structures côtières
- Étude de sites pour champ éolien en mer
- Étude érosion côtière
- Campagne de mesures où le spectre directionnel total de houle est souhaité
- Étude d'agitation en milieu portuaire
- Étude des courants de marée
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Water velocity measurements
Maximum profiling range 30 m Cell size 0.25-4.0 m Number of cells Typical 20-40, max. 128 Velocity range ±10 m/s horizontal, ±5 m/s along beam Accuracy ±1% of measured value ±0.5 cm/s Velocity precision Consult instrument software Maximum output rate 1 Hz Internal sampling rate 7 Hz -
Echo intensity (along slanted beams)
Sampling Same as velocity Resolution 0.45 dB Dynamic range 90 dB Transducer acoustic frequency 1 MHz Number of beams 3 beams 120° apart, one vertical beam (90° apart, one at 5° for platform mount) Beam width 1.7° Beam width vertical beam 1.7° -
Wave measurement option (AST)
Maximum depth 35 m Data types Pressure, one velocity along each beam, AST Sampling rate velocity (output) 2 Hz Sampling rate AST (output) 4 Hz No. of samples per burst 512, 1024 or 2048 -
Wave estimates
Range -15 to 15 m Accuracy/resolution (Hs) < 1% of measured value / 1 cm Accuracy/resolution (Dir) 2° / 0.1° Period range 0.5-50 s Cut-off period (Hs) 5 m depth: 0.5 sec, 20 m depth: 0.9 sec, 60 m depth: 1.5 sec Cut-off period (dir) 5 m depth: 1.5 sec, 20 m depth: 3.1 sec, 60 m depth: 5.5 sec -
Sensors
Temperature: Thermistor embedded in housing Temp. range -4 to +40 °C Temp. accuracy/resolution 0.1 °C/0.01°C Temp. time response < 5 min Compass: Magnetoresistive Accuracy/resolution 2°/0.1° for tilt <15° Tilt: Liquid level Accuracy/resolution 0.2°/0.1° Maximum tilt 30°,AST requires <10° instrument tilt Up or Down Automatic detect Pressure: Piezoresistive Range 50 m Accuracy 0.5% of full scale (optional 0.1% of full scale) Resolution 0.005% of full scale -
Analog inputs
No. of channels 2 Supply voltage to analog output devices Three options selectable through firmware commands: Battery voltage/500 mA, +5V/250 mA, +12V/100 mA Voltage input 0-5 V Resolution 16-bit A/D -
Data Recording
Capacity 9 MB standard, 4/16 GB (Prolog) Profile record Ncells*9 + 120 bytes Wave record Nsamples*24 + 1k bytes Mode Stop when full (default and Prolog) or wrap mode -
Real Time Clock
Accuracy ±1 min/year Backup in absence of power 1 year -
Data Communications
I/O RS-232 or RS-422. Software supports most commercially available USB– RS-232 converters Communication baud rate 300- 115200 Bd Recorder download baud rate 600/1200 kBd for both RS-232 and RS-422 User control Handled via "AWAC AST" software, or ActiveX® controls. "Seastate" for online systems Output formats NMEA, Binary. Prolog provides same types also for processed wave and current data. -
Connectors
Bulkhead MCBH-2-FS, MCBH-8-FS, optional Souriau M-series metal connector for online use Cable PMCIL-8-MP on 10 m polyurethane cable, metal connector optional -
Software
Functions Deployment planning, instrument configuration, data retrieval and conversion. (for Windows®) -
Power
DC input 9- 18V DC Maximum peak current 3 A Avg. power consumption 0,65 W Sleep current < 100 μA Transmit power 1-30W, 3 adjustable levels -
Environmental
Operating temperature -4 to +40 °C Storage temperature -20 to +60 °C Shock and vibration IEC 721-3-2 EMC approval IEC 61000 Depth rating 300m -
Materials
Standard model POM and polyurethane plastics with titanium fasteners -
Dimensions
Maximum diameter 210 mm Maximum length 175 mm -
Weight
Weight in air 6.1 kg Weight in water 2.9 kg -
Online cable
Polyurethane jacket, Shore D hardness, 13mm in diameter, max 2km. Inquire for longer cables
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Technical drawings
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Approvals
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Main product
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AWAC 1 MHz, four beams
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Probe type / Head
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Symmetrical transducer orientation
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Platform head
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Memory
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9 MB of memory on motherboard (M8)
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4 GB SD card data logger
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16 GB SD card data logger
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ProLog with wave processing
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Pressure sensors
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Pressure sensor, 0-10 m
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Pressure sensor, 0-20 m
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Pressure sensor, 0-20m, accuracy 0,1% of FS
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Pressure sensor, 0-30 m
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Pressure sensor, 0-50 m
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Pressure sensor, 0-50m, accuracy 0,1% of FS
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Pressure sensor, 0-100 m
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Pressure sensor, 0-100m, accuracy 0,1% of FS
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Pressure sensor, 0-200m
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Cables
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10m RS232 polyurethane cable with 8-pin inline connector and USB converter
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20m RS232 polyurethane cable with 8-pin inline connector and USB converter
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30m RS232 polyurethane cable with 8-pin inline connector and USB converter
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40m RS232 polyurethane cable with 8-pin inline connector and USB converter
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50m RS232 polyurethane cable with 8-pin inline connector and USB converter
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10m RS422 polyurethane cable with 8-pin inline connector and USB converter
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20m RS422 polyurethane cable with 8-pin inline connector and USB converter
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30m RS422 polyurethane cable with 8-pin inline connector and USB converter
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40m RS422 polyurethane cable with 8-pin inline connector and USB converter
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50m RS422 polyurethane cable with 8-pin inline connector and USB converter
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Other
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Compass and tilt sensor
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Without compass and tilt sensor
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