NORTEK DVL 1000-4000m

Description

The Nortek DVL1000 – 4000 m is a 1 MHz Doppler Velocity Log (DVL) with a maximum operational depth of 4000 m, intended for subsea navigation where size and weight are a concern. The Nortek DVL1000 provides bottom tracking from 0.2 to 75 m altitude, water tracking and current profiling, with quality estimates per beam and ping.

The DVL1000 uses a 4-beam Janus array convex transducer with a 25° beam angle and 2.9° beam width. Bottom velocity single ping standard deviation is 0.5 cm/s at 3 m/s, long-term accuracy is ±0.1 % / ±0.1 cm/s, velocity resolution is 0.01 mm/s and maximum ping rate is 8 Hz. Water tracking and current profiling have a minimum accuracy of 0.3 % of measured value ± 0.3 cm/s, and current profiling has a maximum range of 30 m with up to 150 cells of 0.2–2.0 m.

The DVL1000 has a POM and titanium housing, 164 mm high with a diameter of ø114 mm, and weighs 2.7 kg (1.7 kg in water). It runs on 12–48 V DC input with 1.3 W average power and 1.5 A maximum peak current. Interfaces are configurable RS232 or RS422 serial on a Subconn 8-pin male connector, or 10/100 Mbits Ethernet, with Nortek proprietary, NMEA0183 and PDx variant data formats. Internal memory is 16 GB, with 64 GB optional, and pressure and temperature sensors are included.

Technical Specification

Height

164 mm

Diameter

ø114 mm

Frequency of operation

1 MHz

Beam width

2.9°

Configuration

4-beam Janus array convex transducer, 25° beam angle

Internal memory

16 GB / 64 GB (optional)

Bottom velocity single ping std @ 3 m/s

0.5 cm/s

Bottom velocity long-term accuracy

±0.1 % / ±0.1 cm/s

Minimum altitude

0.2 m

Maximum altitude

75 m

Bottom velocity resolution

0.01 mm/s

Maximum ping rate

8 Hz

Quality estimates

Per beam and ping

Water tracking minimum accuracy

0.3 % of measured value ± 0.3 cm/s

Water tracking minimum range

2.0 m

Current profiling minimum accuracy

0.3 % of measured value ± 0.3 cm/s

Current profiling velocity resolution

0.1 cm/s

Current profiling interval

User-specific Nth ping

Current profiling maximum range

30 m

Blanking

0.1 m

Cell size

0.2–2.0 m

Max number of cells

150

Operating temperature

−4 to +40 °C

Storage temperature

−20 to +60 °C

Depth rating

4000 m

Weight

2.7 kg

Weight in water

1.7 kg

Serial interface

Configurable RS232 or RS422, Subconn connector, 8-pin male (either serial or Ethernet)

Ethernet

10/100 Mbits Auto MDI-X; TCP/IP, UDP/IP, HTTP protocols; fixed IP / DHCP client / Auto IP address assignment; UPnP and Nortek proprietary instrument discovery over Ethernet; IEEE1588/PTP and NTP for absolute time stamping; multiple simultaneous data format transmission possible

Data formats

Nortek proprietary w/ 1 ms time stamp accuracy, NMEA0183, variants of PDx

Trigger

Internal 1, 2, 3, 4, 5, 6, 7 or 8 Hz or Trigger In; trigger option through command (Ethernet or serial); external TTL or 485 lines (configurable Rising/Falling/Edges)

Pressure sensor

0.1 % FS / precision better than 0.002 % of full scale per sample

Temperature sensor

−4° to +40 °C ± 0.1 °C

DC input

12–48 V

Maximum peak current

1.5 A

Average power

1.3 W

Materials (standard models)

POM and titanium housing

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