AWAC2 400 New
Awac400K Hz 3
Awac400K Hz 4
AWAC2 400 New
Awac400K Hz 3
Awac400K Hz 4

Oceanography

AWAC 2

400 kHz

Profils de courant et houle directionnelle jusqu'à des fonds de 100 m

Aperçu

The AWAC 400 kHz 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 100 m maximum range for wave measurements and 1.5 Hz sampling of the surface elevation, the AWAC 400 kHz is the optimal tool for deeper-water current and wave measurements.

  • Currents
  • Waves

Points forts

  • Real-time current profiles and waves to 100 m range
  • Acoustic surface tracking (AST) with vertical beam
  • Can be used both with fixed frames and subsurface buoys

Utilisation

  • Online measurements of currents and waves
  • Design data for planning of new coastal structures
  • Site studies for offshore wind platforms
  • Coastal erosion studies
  • Measurement campaigns where the full wave spectrum is needed
  • Monitoring of transient waves for channel wall protection
  • Studies of tidal currents

Setup

Designed for straightforward and reliable current and wave measurements in up to 100m of water, the AWAC 400kHz is configured using the AWAC deployment software before installation. The 400kHz AWAC’s wave measurement range is the longest of the AWAC family.

Deployment

AWACs are often bottom-mounted and/or implemented as part of real-time wave monitoring systems. Leading industry partners offer bespoke frames and buoys for the AWAC.

Data

Optional onboard wave processing allows real-time streaming of wave parameters to users onshore. Nortek’s SUV processing method (exclusive to AWACs and Signatures) enables quality wave measurements from a moving subsurface buoy. Nortek postprocessing software and/or display software is available for review or visualization of data, after deployment or in real time.

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Maximum profiling range

100 m

Cell size

1.0-8.0 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

2 Hz

Sampling

Same as velocity

Resolution

0.45 dB

Dynamic range

90 dB

Transducer acoustic frequency

400 kHz, 600 kHz for vertical beam

Number of beams

3 beams 120° apart, one vertical beam, (90° apart, one at 5° for platform mount)

Beam width

2.4°

Beam width vertical beam

1.7°

Maximum depth

100 m

Data types

Pressure, one velocity along each beam, AST

Sampling rate velocity (output)

0.75 Hz

Sampling rate AST (output)

1.5 Hz

No. of samples per burst

512, 1024 or 2048

Range

-15 to 15 m

Accuracy/resolution (Hs)

< 1% of measured value / 1 cm

Accuracy/resolution (Dir)

2° / 0.1°

Period range

1-50 s

Cut-off period (Hs)

20 m depth: 0.9 sec, 60 m depth: 1.5 sec, 100 m depth: 2 sec

Cut-off period (dir)

20 m depth: 3.1 sec, 60 m depth: 5.5 sec, 100 m depth: 7.1 sec

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

100 m

Accuracy

0.5% of full scale (optional 0.1% of full scale)

Resolution

0.005% of full scale

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

Accuracy

±1 min/year

Backup in absence of power

1 year

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

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

Functions

Deployment planning, instrument configuration, data retrieval and conversion (for Windows®)

DC input

9-18 V DC

Maximum peak current

3 A

Avg. power consumption

0.23 W

Sleep current

< 100 μA

Transmit Power

1-30 W, 3 adjustable levels

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

300 m

Standard model

Delrin® and polyurethane plastics with titanium screws

Maximum diameter

306 mm

Maximum length

203 mm

Weight in air

7.3 kg

Weight in water

3.6 kg

Polyurethane jacket, Shore D hardness, 13 mm in diameter, max 2 km. Inquire for longer cables

External

540Wh (alkaline) or 1800 W (lithium)

Declaration of conformity

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