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 acoustic ranging to ice. Its compact design and low power consumption make it an ideal tool for long-term deployments in all waters.
Points forts
200 m current profiling range
Wave height and direction from 150 m installation depth
Acoustic ranging to ice
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
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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
Acoustic ranging to ice, 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
Vibration
IEC60068-2-64
EMC approval
IEC/EN 61000-6-2, 61000-6-3
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)
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Technical drawings
Signature 250 General Arrangement - NGA061-001 Rev.-
