Model 803 ROV Current Meter

Description

The Valeport Model 803 ROV Current Meter is a 2 axis electromagnetic current meter that gives ROV pilots relative through water speed data in real time. It can be fitted directly on an ROV to give vehicle through water speed, or on the Tether Management System (TMS) to measure local flow conditions, and is supplied with a 4000 m rated titanium housing as standard.

The sensor measures water velocity in 2 axes across the sensor surface and updates the data at 1 second intervals (1 Hz default), giving X axis flow across the vehicle and Y axis flow into the vehicle. Range is ±10 kts / ±5 m/s, accuracy is ±0.02 kts / 0.01 m/s + 1 % of reading and resolution is 0.01 kts / 0.001 m/s. Units are knots as standard, with m/s as an option.

Digital output is RS232 or RS485 (internally set) at 19200 baud default, and analogue output is −5 to +5 V for each channel, with 0–5 V or 0–10 V available (optional). Update rate and output format can be changed through a terminal program. The system is supplied with licence free ROVLog PC software for display and logging of data.

The sensor is an 11.5 cm discus EM sensor made from polyurethane with titanium mounting, and should be mounted in clear flow on the ROV or TMS. The instrument measures 76 mm Ø × 350 mm, weighs 3.5 kg in water, runs on 7–29 V DC at 2 W nominal and has an 8 way SubConn BH8M connector. Part 0803002 is supplied with pigtail/setup lead, USB adapter, operating manual and transit case.

Technical Specification

Sensor

11.5 cm discus EM sensor, polyurethane with titanium mounting

Measurement

Water velocity in 2 axes (X: flow across vehicle, Y: flow into vehicle)

Housing

Titanium, 4000 m depth rating

Dimensions

76 mm Ø × 350 mm length

Weight

3.5 kg (in water)

Connector

8 way SubConn BH8M

Units

Knots standard; m/s (optional)

Range

±10 kts / ±5 m/s

Accuracy

±0.02 kts / 0.01 m/s + 1 % reading

Resolution

0.01 kts / 0.001 m/s

Update rate

1 Hz default

Power

7–29 V DC, 2 W nominal

Digital output

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>

String format (m/s)

sx.xxx<tab>sy.yyy<cr><lf>

Analogue output

−5 to +5 V for each channel; 0–5 V or 0–10 V (optional)

Settings

Update rate and output format changeable via terminal program

Software

ROVLog PC software, licence free (supplied)

Configuration

Self-contained instrument as standard; separate sensor and electronics packages or OEM system (optional)

Shipping size

52 × 46 × 23 cm

Shipping weight

11 kg

Part number 0803002

Model 803 ROV Current Meter in titanium, 4000 m rated; supplied with pigtail/setup lead, USB adapter, operating manual and transit case

Part number 0803002-A

Model 803 ROV Current Meter in titanium, 4000 m rated; supplied as above with analogue output

Part number 0803EA2

RS485 communications adapter for PC (optional)

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