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Overview
The Signature100 combines a four-beam current profiler operating at 100 kHz with an optional scientific echosounder.
Both the current profiler and the biomass measurements have an effective range of 300-400 m providing unprecedented insight into the dynamics of zooplankton, krill or even schools of fish. Likewise, acoustic tracer material can give new insight into small-scale physical processes.
Highlights
300–400 m current profiling range
Optional center beam with 70–120 kHz echosounder
Applications
Detection of krill in the water column
Cost-effective current profile measurements at mid-range
Plankton migration studies
Upwelling and downwelling studies
Internal waves
Suitable for buoy mounting with internal AHRS
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Water velocity measurements
Maximum profiling range
300-400 m*
Cell size
3–15 m
Minimum blanking
TBA
Maximum number of cells
200
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
1 Hz (1/2 Hz at max output power)
*Maximum range depends on 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
Average and echosounder
Alternate
N/A
* US Patent 8223588
Echo Intensity (along slanted beams)
Sampling
Same as velocity
Resolution/dynamic range
0.5 dB/70 dB
Transducer acoustic frequency
100 kHz
Number of beams
4 slanted at 20°, optional vertical beam for echosounder
Beam width
6.1° (slanted)
Echosounder option
Transducer acoustic frequency
70–120 kHz
Transducer beam width
15° @ 70 kHz, 8.7° @ 120 kHz
Resolution
0.375–4 m
Number of bins
1800
Transmit pulse length
0.5–6 ms
Transmit pulse
Monochromatic 70 kHz, 90 kHz and 120 kHz or frequency chirp (90 kHz, 50% BW)
Transmit power
1.2–120 W, adjustable
Chirp signal processing
Pulse compression or binned frequency response
Raw complex data storage
Configurable rate
Resolution/dynamic range
0.01 dB / 130 dB
Linearity
TBA
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), ± 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-XTCP/IP, UDP, HTTP protocolsFixed IP/DHCP client/AutoIP, UPnP
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
4–200 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 (for 6000 m version, contact Nortek for specifications)
Materials
Standard model
POM with titanium fasteners. Titanium/POM transducer cups
Dimensions
Maximum diameter
460 mm
Maximum length with room for internal batteries
765 mm (2 batteries)
Maximum length without room for internal batteries
N/A
Weight
In air, no battery
37.5 kg
In water, no battery
13 kg
Battery
10.0 kg (2x540 Wh), 5.8 kg (2x1800 Wh)
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Technical drawings
Signature 100 General Assembly - NGA061-007 Rev.-A
