Nortek Signature250 250k Hz sideview 5 transducer
Signature250 2
Signature250 3
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Nortek Signature250 250k Hz sideview 5 transducer
Signature250 2
Signature250 3
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Ocean currents

Signature250

Intermediate current profiling range that includes wave height/direction and ice tracking capability

Overview

The Signature250 ADCP is a medium-range current profiler with a suite of extra features. It has a current profiling range of 200 m, and can measure wave height, period and direction at depths as great as 150 m. The Signature250 ADCP can also measure ice thickness, as well as the speed and direction of drifting ice. Its compact design and low power consumption make it an ideal tool for long-term deployments in all waters.

  • Currents
  • Waves

Highlights

  • 200 m current profiling range
  • Wave height and direction from 150 m installation depth
  • Acoustic ranging to ice

Usage

  • Ice drift and draft measurements
  • Directional wave measurements
  • Mid-depth current profiles
  • Studies of tidal currents
  • Plankton migration studies
  • Upwelling and downwelling studies
  • Large-scale mixing studies
  • Suitable for wave buoys

Setup

The Signature Deployment software guides users through setup to ensure even the most detailed concurrent measurement schemes are handled correctly and makes certain all users can fully utilize the capabilities of the Signature250 ADCP.

Deployment

The Signature250 offers dependable buoy and bottom frame setups from Nortek and leading industry partners tailored for the instrument. Optional AHRS updated at the same rate as sampling improves motion correction during buoy-mounted measurements.

Data

Concurrent measurement plans enable simultaneous measurements of long-range current profiles and ice tracking. Ocean Contour is a powerful postprocessing software created specifically for the AD2CP platform.

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Maximum profiling range

200 m

Cell size

1-8 m

Minimum blanking

0.5 m

Maximum number of cells

200 (average)

Velocity range (along beam)

User-selectable 2.5 or 5.0 m/s

Minimum accuracy

1% of measured value ± 0.5 cm/s

Velocity precision

Broadband processing, consult instrument software

Velocity resolution

0.1 cm/s

Max sampling rate

3 Hz (1 Hz at max power)

Velocity range

N/A

Cell size

N/A

Profiling range

N/A

Range velocity limitations

N/A

Single

Average

Concurrent

Average and waves/ice

Alternate

N/A

Sampling

Same as velocity

Resolution/ dynamic range

0.5 dB / 70 dB

Transducer acoustic frequency

250 kHz

Number of beams

5; 4 slanted at 20°, 1 vertical at 500 kHz (optional)

Beam width

2.3° (slanted), 2.2° (vertical)

Resolution

N/A

Number of bins

N/A

Transmit pulse length

N/A

Transmit pulse

N/A

Resolution / dynamic range

N/A

AST frequency

500 kHz

AST max distance

170 m

Maximum wave measurement depth

150 m

Height range

-15 to +15 m

Accuracy/resolution (Hs)

< 1% of measured value / 2 cm

Accuracy/resolution (Dir)

2° / 0.1°

Period range

2-50 s

Cut-off period (Hs)

25 m depth; 2 sec, 50 m depth; 2 sec,100 m depth; 2.2 sec, 150 m depth; 2.7 sec

Cut-off period (dir)

Please inquire

Sampling rate (velocity and AST)

1 Hz

Parameters

Acoustic ranging to ice, speed and direction, echo sounder data

Temperature:

Thermistor in head (sampled at meas. rate)

Temp. range

-4 to +40 °C

Temp. accuracy/resolution

0.1 °C/0.01 °C

Temp. time response

2 min

Compass:

Solid State magnetometer (max 1 Hz sample rate)

Accuracy/resolution

2° for tilt < 30°/0.01°

Tilt:

Solid State accelerometer (max 1 Hz sample rate)

Accuracy/resolution

0.2° for tilt < 30°/0.01°

Maximum tilt

Full 3D

Up or Down

Automatic detect

Pressure:

Piezoresistive (sampled at meas. rate)

Standard range

0-300 m (inquire for options)

Accuracy/precision

0.1% FS / Better than 0.002% of full scale

Accelerometer dynamic range

± 2 g

Gyro dynamic range

± 250°/sec

Magnetometer dynamic range

± 1.3 Gauss

Pitch and roll range / resolution

± 90° (pitch) ± 180° (roll) /0.01°

Pitch and roll accuracy

± 2° (dynamic)4), ± 0.5° (static, ±30°)

Heading range / resolution

360°, all axis /0.01°

Heading accuracy

± 3° (dynamic)4), ± 2° (static, tilt < 20°)

Sampling rate

Same as measurement rate (up to 3 Hz)

Capacity

16 GB, 64 GB or 128 GB (inquire for larger capacity)

Data record

Consult instrument software

Mode

Stop when full

Accuracy

± 1 min/year

Clock retention in absence of external power

1 year. Rechargeable backup battery.

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

Serial

Configurable RS-232/RS-422 300-1250000 bps

Recorder download baud rate

20 Mbit/s (Ethernet only) - 1 GB in 6 minutes

Controller interface

ASCII command interface over Telnet and serial

Depending on configuration

MCBH6F (Ethernet), MCBH8F (serial), MCBH2F-G2 (pwr), optional Souriau M-series metal connector for online use (10M)

Functions

Deployment planning, instrument configuration, data retrieval and conversion (for Windows®)

DC input

15-48 V DC

Maximum peak current

1.5 A

Max. average consumption at 1 Hz

15 W

Typical average consumption

400 mW

Sleep consumption

100 μA, power depending on supply voltage

Transmit power per beam

4-200 W, adjustable levels

Ping sequence

Multiplexing or parallel

Internal

540 Wh alkaline or 1800 Wh lithium

Duration

Depending on configuration, consult software

Operating temperature

-4 to +40 °C

Storage temperature

-20 to +60 °C

Vibration

IEC60068-2-64

EMC approval

IEC/EN 61000-6-2, 61000-6-3

Depth rating

300 m

Standard model

POM with titanium fasteners. Reinforced polyurethane transducer cups

Maximum diameter

464 mm

Maximum length with room for internal batteries

523 mm

Maximum length without room for internal batteries

308 mm

In air, no battery

18.5 kg (17.1 kg short)

In water, no battery

1.5 kg (5.2 kg short)

Battery

5.0 kg (540 Wh), 2.9 kg (1800 Wh)

Signature 250 General Arrangement - NGA061-001 Rev.-

Vibrations test of Signature250
Declaration of conformity
Statement of compliance

Signature250

5-beam head (adds 500 kHz vertical transducer)

4-beam head

Standard, with room for 540 Wh battery

Short, no room for battery

16 GB SD card data logger

64 GB SD card data logger

Pressure sensor, 0-10 m, 0,1%

Pressure sensor, 0-20 m, 0,1%

Pressure sensor, 0-30 m, 0,1%

Pressure sensor, 0-50 m, 0,1%

Pressure sensor, 0-100 m, 0,1%

Pressure sensor, 0-200m, 0,1%

Pressure sensor, 0-500m, 0,1% (Note: instrument depth rating is 300m)

10m Ethernet cable with MCIL6MP, Power/RJ45 at dry end

10-100m Ethernet cable (specify length in comments field) with MCIL6MP-PWR/RJ45

10m Serial RS232 cable, MCIL8MP-DB12

10m Serial RS232 cable, MCIL8MP-DB9 w/RS485 trigger

Serial RS422 cable >10m (specify length in comments field), MCIL8MP-DB9

Online cable, Souriau 10M open ended, (specify length in comments field)

Online cable, Souriau 10M PWR/RJ45, max 100m, (specify length in comments field)

5-beam head (adds 500 kHz vertical transducer)

Compass and tilt sensor

AHRS

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