OCEANOGRAPHY

10/01/2024

Signature55 - 1500 m> 1000 m current profiling range for stand-alone and online applications

The Signature55 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 (comparedto similar ADCPs) also permits long-duration deployments operating on internal batteries only.

Highlights

Applications> 1000 m current profiling range

Observing deep-ocean current profiles

Stand-alone and online applications

Current measurements for deep-water

Concurrent high-resolution and long-range
measurements

meteorological buoys
Fine and coarse deep-water current profiles

Technical specifications
Water velocity measurements
Maximum profiling range*

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

Cell size

5-20 mMinimum blanking

2m

Maximum number of cells

200

Velocity range (along beam)

User-selectable 1 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

1 Hz (1/3 Hz at max power)

Maximum range depends on transmit power and acoustic scattering conditions

HR option (on 5th beam only)
Velocity range

N/A

Cell size

N/A

Profiling range

N/A

Range velocity limitations

N/A

AD2CP measurement modes*
SingleAverage

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 frequency55 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Wave measurement option
AST max distance

N/A

Maximum wave measurement depth

N/A

Height range

N/A

Accuracy/resolution (Hs)

N/A

Accuracy/resolution (Dir)

N/APeriod range

N/A

Cut-off period (Hs)

N/A

Cut-off period (dir)N/ASampling rate (velocity and AST)

N/A

Ice measurement option
Parameters

N/ASensors
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 minCompass:

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 3DUp 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±2g

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)

Dynamic specifications depends on the type of motion

Data recording
Capacity

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

Data recording
Data record

Consult instrument software

Mode

Stop when fullReal-time clock
Accuracy± 1 min/year

Clock retention in absence of external

1 year. Rechargeable backup battery.

power

Data communications
Ethernet

10/100 Mbits Auto MDI-X, TCP/IP, UDP/IP, HTTP protocols,
Fixed IP / DHCP client /Auto IP address assignment, UPnP andNortek proprietary instrument discovery over Ethernet

SerialConfigurable 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)

SoftwareFunctions

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

PowerDC input

15-48 V DC

Maximum peak current

1.5 A

Max. average consumption at 1 Hz

15 W

Typical average consumption*2W

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 forother 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

Environmental
Depth rating

1500 mMaterials
Standard model

POM with titanium fasteners. Reinforced polyurethanetransducer cups

Dimensions
Maximum diameter

648 mmMaximum length with room for internal

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

batteries
Maximum length without room for314 mminternal batteries

WeightIn 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)