Signature55 2
Signature55 1
Signature55 3
Nortek People Signature55 55K Hz Shipping
Nortek People Signature55 55K Hz Testing 1
Signature55 2
Signature55 1
Signature55 3
Nortek People Signature55 55K Hz Shipping
Nortek People Signature55 55K Hz Testing 1

Oceanography

Signature 55

1500 m

> 1000 m current profiling range for stand-alone and online applications

  • > 1000 m current profiling range
  • Stand-alone and online applications
  • Concurrent high-resolution and long-range measurements

Overview

The Signature 55 ADCP is a current profiler that combines an ultralong range with a compact layout. Novel ADCP transducer design allows 1000 m profiles concurrent with slightly shorter-range, finer resolution measurements using two different frequencies in the same instrument. The more than 90% lower power consumption (compared to similar ADCPs) also permits long-duration deployments operating on internal batteries only.

Download our guide to Signature ADCPs here.

  • Currents

Highlights

  • > 1000 m current profiling range
  • Stand-alone and online applications
  • Concurrent high-resolution and long-range measurements

Usage

  • Observing deep-ocean current profiles
  • Current measurements for deep-water meteorological buoys
  • Fine and coarse deep-water current profiles

Setup

The Signature Deployment software guides users through setup to ensure all measurement schemes are handled correctly and makes certain all users can fully utilize the capabilities of the long-range ADCP.

Deployment

The Signature 55 offers dependable buoy and bottom frame setups from Nortek and leading industry partners tailored for the instrument. Up to 90% lower power consumption compared to similar ADCPs means this low-power, long-range ADCP can operate on internal batteries alone during long deployments.

Data

Ethernet and serial communications options make both online and stand-alone applications possible. Ocean Contour is a powerful postprocessing software created specifically for the AD2CP platform.

Download PDF

Water velocity measurements

Maximum profiling range*

1000 m (55 kHz), 600+ (75 kHz)

Cell size

5-20 m

Minimum blanking

2 m

Maximum number of cells

200

Velocity range (along beam)

User-selectable 1.0 to 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

1 Hz (1/3 Hz at max power)

* Maximum range depends on transmit power and acoustic scattering conditions

AD2CP measurement modes*

Single

Average

Concurrent

N/A

Alternate

Single (coarse/fine)

* US Patent 8223588

Echo intensity (along slanted beams)

Sampling

Same as velocity

Resolution/ dynamic range

0.5 dB / 70 dB

Transducer acoustic frequency

55 and 75 kHz

Number of beams

3, slanted at 20°

Beam width

4.5°-5.5°

Echo sounder option

Resolution

N/A

Number of bins

N/A

Transmit pulse length

N/A

Transmit pulse

N/A

Resolution / dynamic range

N/A

Wave measurement option

AST frequency

N/A

AST max distance

N/A

Maximum wave measurement depth

N/A

Height range

N/A

Accuracy/resolution (Hs)

N/A

Accuracy/resolution (Dir)

N/A

Period range

N/A

Cut-off period (Hs)

N/A

Cut-off period (dir)

N/A

Sampling rate (velocity and AST)

N/A

Ice measurement option

Parameters

N/A

Sensors

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 orientation sensing. Recommended instrument orientation and allowable tilt depend on the measurement application.

Up or Down

Automatic detect

Pressure:

Piezoresistive (sampled at meas. rate)

Standard range

0-1500 m (inquire for options)

Accuracy/precision

0.1% FS / Better than 0.002% of full scale

AHRS option

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)*, ± 0.5° (static, ±30°)

Heading range / resolution

360°, all axis /0.01°

Heading accuracy

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

Sampling rate

Same as measurement rate (up to 1 Hz)

Power

Using AHRS draws more power than the regular compass and tilt sensor. Please refer to the Signature Deployment software.

* Dynamic specifications depends on the type of motion

Data recording

Capacity

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

Data record

Consult instrument software

Mode

Stop when full

Real-time clock

Accuracy

± 1 min/year

Clock retention in absence of external power

1 year. Rechargeable backup battery.

Data communications

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

Connectors

Depending on configuration

MCBH6F (Ethernet), MCBH8F (serial), MCBH2F-G2 (pwr), optional Souriau M-series metal connector for online use (14M)

Software

Functions

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

Power

DC input

15-48 V DC

Maximum peak current

1.5 A

Max. average consumption at 1 Hz

15 W

Typical average consumption*

2 W

Sleep consumption

100 μA, power depending on supply voltage

Transmit power per beam

4-250 W, adjustable levels

Ping sequence

Multiplexing or parallel

* 10 min. avg. profile, 1 cm/sec hor. Prec., Max cell size, max power, long range mode. Consult SW for other configurations

Batteries

Internal

One or two 540 Wh alkaline or 1800 Wh lithium

Duration

Depending on configuration, consult software

Environmental

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

1500 m

Materials

Standard model

POM with titanium fasteners. Reinforced polyurethane transducer cups

Dimensions

Maximum diameter

648 mm

Maximum length with room for internal batteries

547 mm (1 battery), 747 mm (2 batteries)

Maximum length without room for internal batteries

314 mm

Weight

In air, no battery

65.5 kg

In water, no battery

25.1 kg

Battery

10.2 kg (2 x 540 Wh), 7.6 kg (2 x 1800 Wh)

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Products
Signature 55
Signature 250
Signature 100
AWAC 400 kHz
Frequency
55 kHz
250 kHz
100 kHz
400 kHz
Features
Currents
Currents, waves, ice
Currents, echosounder
Currents, waves
Profiling range
1000 m
200 m
400-470 m
100 m
Depth rating options
1500 m
300 m
1500 m, 6000 m
300 m
Maximum number of cells
200
200
200
200
Maximum sampling rate
1 Hz
3 Hz
1 Hz
1 Hz or 2 Hz
Wave measurment capabilities
N/a
Up to 150 m depth, AST
N/a
Up to 100 m depth, AST
Additional options
N/a
Waves
Scientific echosounder
Onboard wave processing
View product
View product
View product
View product

Support resources

Signature

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