|Product literature - Brochure|
The OCEAN SEVEN 320Plus WOCE-CTD multiparameter probe is the result of Idronaut's 25-year-old experience in the design and manufacturing of high quality fast response CTDs. The OCEAN SEVEN 320Plus CTD well meets the WOCE programme accuracy, precision and resolution specifications. The CTD can be easily equipped with an additional redundant conductivity and temperature (CT) sensor pair without the need for underwater connectors. The CT redundant sensors permit the gathering of extremely precise data with a verifiable data quality. The OCEAN SEVEN 320Plus WOCE-CTD is equipped with the well-known IDRONAUT full ocean depth, pump-free and long-term stability sensors. Central to which, is the high accuracy seven-platinum-ring quartz conductivity cell (patented), which can be cleaned in the field without the need for re-calibration. This unique quartz cell employs a large diameter (8 mm) and a short length (46 mm) to guarantee self-flushing and no clogging after long-term deployment even in biologically active waters. Competitors' sensors, which present few mm only of cell orifice and very long cell length, are prone to clog even if protected by dangerous and poisonous antifouling devices. The OCEAN SEVEN 320Plus WOCE-CTD multiparameter probe does not require pumps or any other external device to flush the sensors, which minimizes its power consumption and allows the use in Arctica and Antarctica. However, pump is optional. Acquired data is output using the standard RS232C interface or the telemetry option available for on-line full ocean depth real-time data transmission. Other interfaces like RS422 and wireless Bluetooth© can be optionally installed.
» HIGHLY ACCURATE/PRECISE (0.01%FS) PRESSURE TRANSDUCER
» TEMPERATURE SENSOR
» FLOW CONDUCTIVITY SENSOR
» REDUNDANT PAIR OF TEMPERATURE AND CONDUCTIVITY SENSORS
» OXYGEN SENSOR (7000 m operation)
» pH GLASS SENSOR and SOLID GEL REFERENCE ELECTRODE (7000 m operation)
» DATA TRANSMISSION
» DATA MEMORY
» OPTIONAL PROBES, SENSORS
» SEA-BIRD - Submersible Pump.
» BATTERY OPERATION
Pressure. Data is sampled at regular pressure intervals. Multiple profiles can be obtained by switching the CTD ON and OFF.
Timed. OS320Plus collects a series of samples and then sleeps for the configured time interval before waking up again and repeating the acquisitions. Time interval can be configured from 0.1s up to 1 day. Battery power is conserved while the probe is in sleep mode.
Conditioned. Data is sampled at configurable data rates starting when the selected parameter overcomes the configured boundary. Sampling continues until the selected parameter falls below the configured boundary. Whenever the acquisition cycle starts, a configurable sampling rate 0.1..20 Hz is used. Monitoring of the selected parameter occurs at the configurable interval between 0.1s up to 1 day.
Continuous. Data is sampled at configurable sampling rates starting when the operator switches on the probe. Sampling continues until the probe is switched off. Multiple cycles can be obtained by switching the CTD ON and OFF.
Real-time. Data is sent to the control system at sampling rates of: 20, 30 and 40 Hz using REDAS-5 software.
The Ocean Seven 320Plus CTD operates with the standard Rochester coaxial armoured cables (1/10, 1/8, 1/4, 1/2 inch) present in oceanographic vessels having a total resistance up to 250 ohms.
(1) Other standard pressure transducers, immediately available, have: 100, 1000, 2000, 4000and 6000 dbar ranges.
(3) Through the auxiliary inputs, optional sensors like: Fluorometer, Turbidity Meter, Transmissometer, Altimeter, Par, can be interfaced. Ten auxiliary analogue inputs are available inside the probe.
The fundamental properties of seawater, like:
Salinity, Sound Speed, Water Density, Oxygen ppm are obtained using the algorithms described in the UNESCO technical papers in marine science no. 44 "Algorithms for computation of fundamental properties of sea water".
The freshwater properties like:
TDS (Total Dissolved Solids), Fresh Water Conductivity corrected at 20°C and 25°C are automatically calculated.
Battery power supply:
|user selectable: 20, 30 and 40 Hz raw data CTD using REDAS-5 software.|
proprietary byte-oriented, binary and plain message protocol.
friendly menu-driven user interface.
512-MByte non-volatile memory
9 .. 18 V, 245 mA @ 12 V.
|Physical characteristics for:||1500 dbar||7000 dbar|
|Diameter of protective cage/s:||260 mm, titanium.|