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Wave Unit
The Datawell Wave Unit is an OEM version of the well-known Directional Waverider MkIII for measuring wave motions in three directions. The unit gives out the real time heave, north and west displacements as well as common wave parameters like Hs and Tz and spectral data.
The Wave Unit is built around Datawell’s accurate and well-proven stabilized platform sensor, enabling wave height measurements by a single accelerometer. For the wave direction, direct pitch and roll measurements are performed needing no integration. In combination with horizontal accelerometers and a compass this forms the complete sensor unit, the heart of the Wave unit.
The Wave Unit is essentially a DWR-MkIII Waverider buoy in an OEM package. It is meant to be integrated as a complete sensor package in oceanographic and meteorological buoys.
Heave
Range: | -20 m to +20 m, resolution: 0.01 m |
Accuracy: | < 0.5% of measured value after calibration < 1.0% of measured value after 3 years |
Period*: | 1.6 s to 30 s |
* The actual high frequency cut-off point depends on the size of the buoyancy platform on which the wave unit is mounted.
Direction
Range: | 0° to 360°, resolution 1.4° (1 binary degree) |
Heading error: | 0.4° to 2° (depending on latitude), typically 0.5° |
Period: | 1.6 s to 30 s |
** This specification assumes that the magnetic field is not disturbed by the presence of magnetic materials.
Interface
Port: | RS-232 |
Format: | Datawell hexadecimal format (HXV) |
Data output rate: | 1.28 Hz (internal sampling 3.84 Hz) |
General
Temperature range | Operating: -5 °C to +35 °C Storage: -5 °C to +40 °C (+55 °C short term, weeks only) |
Weight | Approx. 36 kg |
Material | Housing stainless steel AISI 316 |
Isolation | All inputs and outputs are galvanically isolated |
Size | Diameter approx. 410 mm Height over all approx. 560 mm |