OCEAN SEVEN 310 CTD
28Hz VERY-LOW-POWER, SELF-RECORDING and PROFILING MULTIPARAMETER CTD
The OCEAN SEVEN 310 multiparameter CTD represents a real breakthrough in the concept of miniaturization, integration and performance. Thanks to the adoption of a new generation of electronic devices, the OS310 can interface several analogue and digital sensors and can guarantee sampling rates up to 28Hz. The operator can easily select the OS310 sampling rate from 1Hz to 28Hz (samples per second), according to the required monitoring or profiling activity. The OS310 CTD can be easily integrated/adapted to third-party systems like floating profilers and/or oceanographic moorings, ROVs and AUVs. IDRONAUT prides itself on the design of its full ocean depth, low maintenance sensors. The OS310 does not require pumps or any other external device to flush the sensors, which minimizes its power consumption. The OS310 is characterized by a drift free sensors preamplifier.
IDRONAUT
BRUGHERIO (MB), IT
Description
CONDUCTIVITY CELL The high accuracy seven platinum ring quartz conductivity cell (patented) can be cleaned in the field without the need for recalibration. This unique quartz cell employs a large diameter (8mm) and a short length (46mm) to guarantee self-flushing and no clogging after long-term deployment even in biologically active waters. Furthermore, an optional UV LED (280 nm), integrated into the conductivity cell, sterilizes the sample under measurement, thus avoiding the early growth of biofouling inside the quartz measuring cell.
TEMPERATURE SENSOR Features a very fast platinum resistance thermometer (response time: 50 ms). Negligible self-heating effect. Optionally combined C/T sensor featuring a 7ms fast thermistor (20 ms after processing) integrated in the conductivity cell is available upon request.
DATA STORAGE
•Continuous: Sampling at configurable rate.
•Pressure: Data is sampled at pressure intervals.
•Timed: Data is sampled at configured time interval.
•Conditional: Data is sampled when a threshold value is reached.
•Burst: Burst sampling at configured time intervals
•Sound Velocity Profiler: Data is sampled at pre-set pressure intervals and then exported .svp or .asvp format.
SELF-RECORDING MODES The OS310 CTD is equipped with a 4Gbyte data memory, which allows the storing of about 250 millions data sets, each one being composed of the reading of all the installed sensors plus the acquisition date and time. The OS310 communicates at a speed up to 115k2 bps, thus keeping data uploading time to a minimum.
SOFTWARE Idronaut software allow the operator to configure the OS310 data acquisition, logger functions and upload data from the memory. They are:
• WTERM: Windows Terminal emulation software to easily communicate with the OS310 using the built-in operator interface and communication protocol. Users are easily able to view real time data, configure the probe for unattended acquisition and upload stored data.
• REDAS-5: Windows Data processing and retrieval software, which allows the display and plotting of conductivity, temperature, pressure and derived variables such as salinity, sound speed and water density, according to UNESCO formulas and recommendations.
Specifications
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General
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Year of initial development
2017
Weight in air [kg]
3
Diameter [mm]
75
Length [mm]
630
Max. cable length [m]
200
Housing Material
POM diam. 75 mm for 2000 m depth or Titanium for 7000 m depth
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Observations
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Min. depth increment [m]
0
Min. time increment [s]
0
-
Operation Characteristics
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Data display on dedicated hardware
N
Display of analogue data
Y
Method of first recording
Internal memory
-
Pressure, temperature and conductivity sensor
-
Max. conductivity [S/m]
9
Resolution of conductivity [10^-3 S/m]
0
Min. temperature [°C]
-5
Max. temperature [°C]
50
Resolution of temperature [°C]
0
Resolution of pressure [% FS]
0
Pressure sensor
Y
Temperature sensor
Y
Type of temperature sensor
Pt100
Conductivity sensor
Y
Type of conductivity sensor
7-ring quartz cell
Accuracy of pressure sensor
0.05 or optional 0.01%FS
Accuracy of temperature measurement
0.0015
Accuracy of conductivity measurement
0.00015 S/m
Type of pressure sensor
Piezoresistive Transducer
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Software specifications
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Recording with third party software
Y
Software name
ITERM and REDAS-5
Graphical presentation
Y
Raw data editing
Y
Re-computation with raw data
Y
CTD Probe controller
Y
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Environmental
-
Max. depth [m]
7000
Max. pressure [bar]
700
Operating temperature: min. [°C]
-5
Operating temperature: max. [°C]
50
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Data and connectivity
-
Max. number of samples for self-recording [10^3]
250000
External recorder required
N
Dedicated surface data logger
N
Dedicated sub-surface data logger
Y
Telemetry link to remote location
Y
Direct data reading
Y
Connectors
RS232
Internal memory
Y
Internal Memory [MB]
4000
Type of internal memory
SD memory card
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Power
-
Battery type
Lithium or NiMh rechargeable, Alkaline unrechargeable
Battery duration [hr]
20
Min. operating power [V]
2
Max. operating power [V]
5
Battery
optional
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Additonal sensors
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Standard sensor
Conductivity, Temperature, Pressure, Dissolved Oxygen (polarographic and optical), pH, Redox
Description of additional sensors
Turbidity Meter, Fluorometers, MISS Mini Sampler, PAR, Altimeter, ecc..
No. of additional sensors
2
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More information
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Distinguishable features
small diameter, best pH, interface analogue and digital sensors, sampling rates up to 28Hz.easily integrate floating profilers, oceanographic moorings, ROVs and AUVs full ocean depth, pump free, low maintenance sensors, low power consumption. drift free sensor preamplifiers, flow-through cell, self-flushing conductivity cell with optional UV antifouling, RS232, Telemetry, Wireless
