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Valeport - Model 803 -ROV Electromagnetic Current Meter
The Model 803 is designed specifically for use on ROVs and other underwater vehicles, providing real time relative water velocity information for pilots. It may be fitted to ROVs to provide actual through the water speeds, or fitted to Tether Management Systems to give measurement of local flow conditions. Measurements are updated every second and the ROVLog software provides a graphic and data display, and enables data to be logged to disk.
This instrument is the result of combining Valeport`s proven current sensing technology with the knowledge and experience of some of the UK`s leading ROV manufacturers and operators. The concept is simple - the Model 803 consists of a Valeport 2 axis electromagnetic flow sensor, with processing electronics capable of giving a variety of output formats for easy interface to almost any system.
The sensor should be mounted in clear flow on the ROV or TMS. When power is applied to the sensor, it measures the water velocity in 2 axes across the sensor surface. This data is updated at 1 second intervals, to provide X and Y axis flow information: the X axis is flow across the vehicle, and the Y axis is flow into the vehicle. This data can either be taken into a separate logging package, or displayed and logged to PC using the ROVLog Windows software provided.
As standard the Model 803 is supplied as a complete self-contained instrument, but can optionally be configured with separate sensor and electronics packages, or even as an OEM system. The Model 803 will appeal both to operators who wish to improve their existing vehicles, and to manufacturers who want to offer it as an additional parameter in the sensor package.
Physical
- Sensor: 11.5cm discus EM sensor, made from polyurethane with titanium mounting.
- Housing: Titanium for 3000m depth rating. (4000m optional)
- Dimensions: 76mmØ x 350mm length (titanium)
- Weight: Titanium 3.5kg (in water).
- Connector: 8 way Subconn BH8M.
Performance
- Units: Knots standard, option: m/s.
- Range: ± 10kts (± 5m/s).
- Accuracy : ± (0.02kts (0.01m/s) + 1% reading).
- Resolution: 0.01kts (0.001m/s).
Output Formats
Default settings are applied for update rate and output format as standard. Changes can be made to these settings via a Terminal program
- Digital: RS232 or RS485 (internally set). 19200 baud (default), 8 data bits, 1 stop bit, no parity bits.
- String format: Kts: sxx.xx<tab>syy.yy<cr><lf>
- M/s: sx.xxx<tab>sy.yyy<cr><lf>
- Where: s= sign, + or -
- xx.xx or x.xxx = speed on X axis
- yy.yy or y.yyy = speed on Y axis
- Analogue: -5 to +5v for each channel (0-5v or 0-10v (optional) also available).
- Update rate: 1Hz default.
- Power: 7 - 29vDC, 2W nominal.
Software
- System supplied with ROVLog Windows based PC software, for display of data from the instrument.
- ROVLog is license free.
Shipping
- Size: 52 x 46 x 23cm
- Weight: 11kg