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CURRENT PROFILER

Signature250

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

Technical specification (PDF)
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Highlights

  • 200 m current profiling range
  • Wave height and direction from 150 m installation depth
  • Ice thickness and ice tracking

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.

Applications

  • 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
Signature ADCP deployment
Performance model for Nortek Signature series
Capabilities of the Nortek ADCP

    • Toggle all

    • Water velocity measurements

      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)

    • 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 Average and waves/ice
      Alternate N/A

    • Echo Intensity (along slanted beams)

      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)

    • 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 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

    • Ice measurement option

      Parameters Ice thickness, speed and direction, echo sounder data

    • 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 0-300 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)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)

    • 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 (10M)

    • 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 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

    • Batteries

      Internal 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
      Shock and vibration IEC 60068-1/IEC60068-2-64
      EMC approval IEC 61000
      Depth rating 300 m

    • Materials

      Standard model POM with titanium fasteners. Reinforced polyurethane transducer cups

    • Dimensions

      Maximum diameter 464 mm
      Maximum length with room for internal batteries 523 mm
      Maximum length without room for internal batteries 308 mm

    • Weight

      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)

    • Toggle all

    • Main product

      01

      Signature250

      02

      5-beam head (adds 500 kHz vertical transducer)

    • Probe type / Head

      01

      4-beam head

    • Housing

      01

      Standard, with room for 540 Wh battery

      02

      Short, no room for battery

    • Memory

      01

      16 GB SD card data logger

      02

      64 GB SD card data logger

    • Pressure sensors

      01

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

      02

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

      03

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

      04

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

      05

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

      06

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

      07

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

    • Cables

      01

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

      02

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

      03

      10m Serial RS232 cable, MCIL8MP-DB12

      04

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

      05

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

      06

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

      07

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

    • Other

      01

      5-beam head (adds 500 kHz vertical transducer)

      02

      Compass and tilt sensor

      03

      AHRS

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