










CURRENT PROFILER
Signature55
> 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
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Overview
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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 (compared to similar ADCPs) also permits long-duration deployments operating on internal batteries only.
Highlights
- > 1000 m current profiling range
- Stand-alone and online applications
- Concurrent high-resolution and long-range measurements
Applications
- Observing deep-ocean current profiles
- Current measurements for deep-water meteorological buoys
- Fine and coarse deep-water current profiles
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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 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*
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 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) * 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 10.0 kg (2 x 540 Wh), 5.8 kg (2 x 1800 Wh)
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Technical drawings
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Approvals
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Main product
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Signature55
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Probe type / Head
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3x55 kHz transducer head
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Housing
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Long (for two internal batteries or one battery and DSL)
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Medium (for one internal battery or DSL modem)
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Short (no internal batteries or DSL modem)
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Memory
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16 GB SD card data logger
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64 GB
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Pressure sensors
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Pressure sensor, 0-100 m, 0,1%
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Pressure sensor, 0-1000m, accuracy 0,1% of FS
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Pressure sensor, 0-1500m, accuracy 0,1%
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Cables
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10m Ethernet cable with MCIL6MP, Power/RJ45 at dry end
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10-100m Ethernet cable (specify length in comments field) with MCIL6MP-PWR/RJ45
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10m Serial RS232 cable, MCIL8MP-DB12
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10m Serial RS232 cable, MCIL8MP-DB9 w/RS485 trigger
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Serial RS422 cable >10m (specify length in comments field), MCIL8MP-DB9
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Online cable, Souriau 10M open ended, (specify length in comments field)
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Online cable, Souriau 10M PWR/RJ45, max 100m, (specify length in comments field)
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Other
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Compass and tilt sensor
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AHRS
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Nortek Discover
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Ocean Contour
Data visualization and processing software
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Serial to USB driver
Virtual COM port driver to allow Nortek's serial-to-USB converters to function.
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Signature 55
Recommended upgrade. New features, fixes and functionality
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Signature Deployment (Installer file)
Deployment software for all Signature series instruments as an installer file. You may download it now and install later if needed. Use the Help menu "Check for updates" function to get the latest firmware and software versions. Should a 32bit be required it may be downloaded here.
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Signature Deployment (Microsoft Store version)
Deployment software for all Signature series instruments available through Microsoft Store. Use the Help menu "Check for updates" function to get the latest firmware and software versions.
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SignatureViewer
Data viewer and post-processing software for Signature series instruments.
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