 The 2000m Aquadopp is designed for deployments down to 2000m and it has all the capabilities of the standard Aquadopp. It is a modern, yet well-proven instrument and it undoubtedly the most versatile single-point current meter on the market. Relative to the standard system, it has a larger diameter (about 84mm vs. 75mm) but it is still made of all plastic parts. As a result, the 2000m model is lighter than the pure-titanium 6000m model and it represents an affordable alternative for the deployment in intermediate waters.
The transducer sensor head is made from machined Delrin materials and the orientation of the beams is the same as in the standard "moring head" configuration.
In the deep ocean, there are fewer particles than in the upper 500m of the water column. Considerable work has been done with the Aquadopp to understand the factors that affect the acoustic signal strength and to improve the magnitude of the returned echo. This work is reflected in current electronics and transducer design.
The most common application for the 2000m Aquadopp is deep-water moorings, where one or more instruments are mounted on a cable that stretches from the bottom to a subsurface float. The instruments can either be clamped directly to the cable or a fin can be used to make sure the instrument is always oriented into the flow.
Unique features
| The 2000m Aquadopp has several unique features that makes it the instrument of choice for deep water moorings: |
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- The Aquadopp records all relevant parameters to the internal recorder, including acoustic signal strength, tilt, compass, battery voltage, and status/error code.
- The sampling strategy is very flexible. The measurement interval, the averaging interval and the exact pinging rate can all be set independently in the deployment planning menu included as part of the standard software.
- The compass includes a hard iron calibration routine that makes it possible to remove the effects of the cable and the mounting clamps on the compass measurements.
- Using the diagnostic mode, the detailed mooring motion (heave, rotation, tilt) can be measured and understood.
- The acoustic signal strength is recorded in order to provide a direct measure of the acoustic conditions.
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Key Features |
| Detailed specifications are provided in the PDF brochure. |
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| Recorder Parameters (standard): |
- 3D Velocity (East/North Up or X/Y/Z or Beam 1/2/3)
- Acoustic signal strength (Beam 1/2/3)
- Compass
- Tilt
- Temperature
- Pressure
- Battery voltage
- Status code
- Error code
In diagnostic mode, all the above parameters are recorded. |
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| Power: |
- Internal battery or external DC source. AC/DC converter comes standard with the Aquadopp
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External Interface:
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- Two analog input channels (0–5V) can be powered and read by the Aquadopp and integrated into the standard data structure
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| Data communication: |
- I/O: RS232 or RS422 at baud rates of 300 to 115200. Binary and ASCII. The software supports most commercially available USB–RS232 converters
- Analog outputs: (3 velocity components)
- User control: Handled via WIN32 software or ActiveX components
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| Data Recording: |
- 9 MB on the mother board, expansion cards available
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| Mechanical: |
- Delrin® housing and transducer head, titanium screws
- Weight in air is about 4.4kg, in water approximately 1.2kg
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| Options: |
- Increased recorder size
- External battery housing
- Internal wiring harness for different communication protocols
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