AWAC2 1 M Hz New
Nortek 30978278355 kopi
Nortek People Awac 1 Mhz Assemble
AWAC2 1 M Hz New
Nortek 30978278355 kopi
Nortek People Awac 1 Mhz Assemble

Oceanography

AWAC 2

1 MHz

Profil de courant et houle directionnelle en zone côtière

Aperçu

L'AWAC 1 MHz est l'instrument de référence pour les mesures de houle à partir du fond. Des milliers d'AWAC ont déjà été déployés à travers le monde pour mesurer la houle directionnelle ainsi que les profils de courant. Avec une portée de 35 m et avec un échantillonnage jusqu'à 4 Hz de la surface, l'AWAC est l'outil de prédilection pour les mesures de courant et de houle en zone côtière.

  • Currents
  • Waves

Points forts

  • 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

Utilisation

  • 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

Setup

Designed for straightforward and reliable current and wave measurements in up to 35m of water, the AWAC 1MHz is configured using Nortek deployment software before installation. The AWAC is often considered the industry standard in wave measurements.

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. Multiple communication protocols make simultaneous power and data transmission easy.

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

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

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°

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

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

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

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, metal connector optional

Functions

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

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

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

Standard model

POM and polyurethane plastics with titanium fasteners

Maximum diameter

210 mm

Maximum length

175 mm

Weight in air

6.1 kg

Weight in water

2.9 kg

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

External

540Wh (alkaline) or 1800 W (lithium)

Declaration of conformity

AWAC 1 MHz, four beams

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