OCEAN SEVEN 316S CTD

SELF-RECORDING and REALTIME TELEMETRY 7000m MULTIPARAMETER PROBE

The OCEAN SEVEN 316S CTD multiparameter probe is equipped with the IDRONAUT full ocean depth long-term stability sensors, central to which, is the high accuracy seven-platinum-ring quartz conductivity cell. The OS316S does not require pump or any other external device to flush the sensors, which minimizes its power consumption and allows the use in Arctica and Antarctica. For added flexibility, the OS316S can be easily interfaced/integrated on buoys, ROVs and AUVs, thus making this probe an ideal choice for both on-line profiling and self-recording moored applications. Optional data telemetry is available for on-line full ocean depth, real-time communications. The OS316S can optionally accommodate analogue and digital inputs dedicated to interface external sensors.

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 re-calibration. 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, optionally two UV-LED (Ultraviolet, 280 nm @500μW, Light-Emitting Diode) are integrated into the conductivity cell, sterilizing 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: 50ms). Negligible self-heating effect. Optionally combined C/T sensor featuring a 7ms fast thermistor (20ms after processing) integrated in the conductivity cell is available upon request.

DATA STORAGE

Allows storage of up to 300M dataset, each one being composed of the reading of all installed sensors plus the date & time, using the internal 4 GByte data memory. The OS316S communicates at a default speed of 38k4 bps, thus keeping data uploading time to a minimum.

SELF-RECORDING MODES

•Continuous: Sampling at configurable rate.

•Pressure: Data is sampled at pressure intervals.

•Timed: Data is sampled at time interval.

•Conditional: Data is sampled when a threshold value is reached.

•Burst: Burst sampling at time intervals.

•Sound Velocity Profiler: Data is sampled at pressure intervals and then exported .svp or .asvp format.

ACCESSORIES

PORTABLE and MKPlus DATA TELEMETRY DECK UNITs: The Telemetry deck unit powers and interfaces, by coaxial oceanographic cables, the OS316S with a PC.

MANUAL PORTABLE WINCH: Includes 2-way or 5-way slip ring and hold: up to 350 m of 5 mm polyurethane jacketed armored cable or up to 200 m of 8.3 mm polyurethane multi-conductor shielded cable.

EXTERNAL SUBMERSIBLE RECHARGEABLE BATTERY PACKS: 14.4VDC (no. 12 NiMH cells), 4.5Ah, Ø 75 x 315 mm, 1500(POM housing) or 7000(Titanium housing) meters max. depth.

TITANIUM PROTECTIVE CAGES: Sensors and/or upper connectors protection: Ø 260 mm. Mooring frame for the CTD and additional probes available.

Specifications

General: Year of initial development

2001

Weight in air [kg]

4

Diameter [mm]

100

Length [mm]

710

Max. cable length [m]

10000

Housing Material

POM Ø 100 mm or Titanium Ø 89 mm

Operation Characteristics: 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

Uncertainty of conductivity [10^-3 S/m]

0

Min. temperature [°C]

-5

Max. temperature [°C]

50

Resolution of temperature [°C]

0

Uncertainty of temperature [°C]

0

Resolution of pressure [% FS]

0

Uncertainty of pressure [% FS]

0

Accuracy of temperature measurement

0.0015°C

Accuracy of conductivity measurement

0.00015 S/m

Accuracy of pressure sensor

0.05%FS or 0.01%FS

Conductivity sensor

Y

Pressure sensor

Y

Temperature sensor

Y

Type of conductivity sensor

7-rings quartz cell

Type of pressure sensor

Transducer

Type of temperature sensor

Pt100

Software specifications: Recording with third party software

N

Software name

Wterm, Redas-5

Graphical presentation

Y

Raw data editing

Y

Re-computation with raw data

Y

CTD Probe controller

Y

Environmental: Max. depth [m]

7000

Max. pressure [bar]

700

Operating temperature: min. [°C]

-5

Operating temperature: max. [°C]

50

Data and connectivity: Max. number of samples for self-recording [10^3]

300000

External recorder required

N

Dedicated surface data logger

N

Dedicated sub-surface data logger

N

Telemetry link to remote location

Y

Connectors

RS232

Internal memory

Y

Internal Memory [MB]

4000

Type of internal memory

SD card

Direct data reading

Y

Power: Battery type

Alkaline, Lithium or NiMH rechargeable

Battery duration [hr]

24

Battery

optional

Max. operating power [V]

32

Min. operating power [V]

9

Additonal sensors: Standard sensor

Conductivity; Temperature; Pressure, Dissolved Oxygen, pH, Redox (ORP),

Description of additional sensors

Turbidity Meter, Fluorometers, PAR, Rosette water sampler, Altimeter, Transmissometer etc..

No. of additional sensors

10