Ocean Seven 315 Online Module

SALINITY. CONDUCTIVITY, TEMPERATURE, OXYGEN, pH, REDOX, TURBIDITY, CHLOROPHYLL, FERRYBOX, THERMOSALINOGRAPH

Product literature - Brochure

This advanced monitoring system offers long-term sensor stability for data collection, in either seawater or fresh water environments. The system can be equipped with two thermometers: the main one, which is located inside the measuring flow-through cell to allow salinity calculations and the optional remote one, which can be installed near the water sampling port to accurately measure the temperature of the water. The system is housed in a compact, watertight stainless steel unit with an adjacent parallel transparent acrylic flow-through measuring chamber, which can be very easily removed for cleaning. The sample volume of the measuring chamber is 250 ml only, which ensures a very fast response time. A pressure sensor inside the cell, acts as an accurate flowmeter. The measurement sensors installed in the system are manufactured by IDRONAUT and are exported all over the world. The system is controlled by advanced electronics and can measure, store and transmit sensor data reading in real time at sampling rates up to 20Hz (CTD only). The system is configured to be directly connected to a personal computer by means of the RS232C serial port, whilst other two optional analogue ports interface the external Fluorometer and Turbidity Meter.The 315 On-Line Module can operate unattended (without PC connected) and can store up to 4.000.000 data sets for each of the 7 standard acquired parameters toghether with date and time using the built-in (internal) 512-MByte standard memory..

» TWO ACCURATE TEMPERATURE SENSORS
Each sensor features a very fast Pt100 platinum resistance thermometer with negligible self-heating effect.. 
The main  thermometer  (time constant: 50 ms) is located inside the mesuring flow-through cell and the optional remote one can be  up to 5 or 15 meter distance.

» PRESSURE SENSOR Accurately monitors the pressure inlet.

» FLOW CONDUCTIVITY SENSOR Features a large diameter, seven-ring quartz cell, which does not require platinum black deposition and which can be cleaned without recalibrating.

» OXYGEN SENSOR Features an innovative maintenance-free polarographic oxygen sensor.

» pH GLASS SENSOR and SOLID GEL REFERENCE ELECTRODE Low impedance glass  membrane  pH  electrode  in conjunction with a ceramic junction-less gel reference electrode.

» FLUOROMETER INTERFACE (external installation) The system can interface a remote Fluorometer installed in an additional  measuring flow-through cell.

» TURBIDITY METER INTERFACE (external installation) The system can interface a remote Turbidity Meter installed in an additional measuring flow-through cell.

» GPS A   GPS connected to a PC running the REDAS-5 software allows acquired data to be automatically time stamped and associated with the geographical coordinates (longitude, latitude).

OPTIONS

» BLUETOOTH® WIRELESS ADAPTER Allows full duplex communications between the 315 On-Line Module and a PC or PDA devices equipped with a Class 1 Bluetooth® .

» RS422 – RS485 INTERFACE Instead of the RS232C interface, upon request, the system can be equipped with an RS422 or RS485 interface.

» WINDOWS REAL-TIME ACQUISITION SOFTWARE - REDAS-5 REDAS-5 software, through a simplified and friendly operator interface, allows taking full control of the 315 On-Line Module acquisitions. REDAS-5 shows the acquired data graphically and numerically. Acquired data is automatically associated with the geographical coordinates acquired from a GPS.

COMUNICATIONS AND DATA CAPTURE
The unit comes as standard with RS232 serial communications and, as an alternative, it can be fitted with an RS422 or RS485 interface. The unit can also be fitted with an optional Class 1 Bluetooth® wireless adapter allowing full duplex communications with any client using the serial port profile (SPP).
Data can be output as a plain ASCII stream allowing real-time data capture by the users' own system or as a proprietary byte oriented protocol allowing data capture and graphing by Idronaut’s own REDAS-5 Windows application.
For more information about REDAS-5, please click here.
Configuration of user preferences and operation of the unit are performed using a simple menu driven interface, accessible through any plain ASCII (UTF 8) terminal emulation software such as Hyperterminal® or Idronaut’s own Iterm Windows® application which is available free of charge.

The fundamental properties of seawater, like: Salinity, Sound Speed, Water Density, Potential Temperature, 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".