Ocean Seven EA89 CTD PROBE

bluetooth, telemetry, data-logger

Product literature - Brochure

The OCEAN SEVEN EA/89 has been designed to meet the needs of environmental agencies operators, in particular of the Environment Agency of England and Wales, daily working in harsh and hostile environments with any meteorological and marine conditions. The OCEAN SEVEN EA/89 multiparameter probe completes the line of high quality and accuracy OCEAN SEVEN probes, fulfilling the demand for a high performance multiparameter probe characterized by an extremely low power consumption, small dimensions and lightweight corrosionfree housing. The OCEAN SEVEN EA/89 is equipped with the IDRONAUT pressure compensated low maintenance sensors and can accurately operate both in salt or fresh water environments. The user can easily select the required conductivity sensor measuring range. Wired and wireless communications allow a direct connection with portable computers. The OCEAN SEVEN EA/89 is an ideal choice for both on-line profiling and self-recording moored applications. The probe uses state-of-the-art electronics and sensors and is equipped with a 512-Mbyte logging memory. Calibration coefficients and probe configuration are stored in the internal non-volatile memory.

 

SELF LOGGING - SAMPLING MODES User selectable sampling modes like: Real time, Continuous, Pressure, Timed, Conditional and Burst. Apart from real time, which is used when a direct connection with the probe is available, the other sampling modes can be easily configured in the laboratory and activated in the field by acting on the probe ON/OFF switch. Acquired data is stored in the internal non-volatile memory that can be retrieved afterwards. REAL-TIME COMMUNICATIONS The OCEAN SEVEN EA89 probe communicates with a PC through the standard RS232C (max 100m) or with the optional RS422 (max 1km) and the IDRONAUT FSK Telemetry (max 2km) SOFTWARE ITERM: terminal emulation programme to easily communicate with the probe using the probe integrated operator interface and upload stored data. REDAS-5: allows taking full control of the OCEAN SEVEN EA89 CTD multiparameter probe and facilitates real- time data acquisitions and uploading of data stored in the probe memory. REDAS-5 shows the acquired data graphically and numerically thus allowing the operator to dynamically change the graphical and numerical set-up during data acquisition. Post processing functions and data extraction procedures, in function of time, pressure or numerical intervals, can be applied to acquired data in real time or on data retrieved from the probe memory. REDAS-5 software alloews 8 and 12 Hz sampling rate. THIRD-PARTY SOFTWARE: the EA789 CTD can be easily interfaced by third-party software (like Trimble Hydropro software) thanks to the built-in fully documented PTP communication protocol. DATA STORAGE AND BATTERY The OCEAN SEVEN EA89 CTD multiparameter probe allows the storing of about 4,000,000 data sets each one being composed of the reading of the standard sensors plus the acquisition date and time. The EA89 probe is powered by a rechargeable NiMH battery pack (9.6 V 4.5 A/h) which is housed in the probe sealed compartment. Therefore, in case of an accidental water leakage (or in case of a battery leakage), only the battery compartment is flooded while the rest of the probe electronics and components are protected. The battery pack allows the probe to continuously operate for up to 90 hours. TELEMETRY PORTABLE DECK UNIT The Telemetry Portable Deck Unit powers and interfaces, by coaxial cables, the probe with a personal computer. The portable deck unit is equipped with a transceiver (modem) which allows half-duplex communication with the probe. The portable deck unit is housed in a waterproof plastic case and is provided with an internal mains rechargeable lead battery (12V DC, 7 A/h) which permits probe operation even in the absence of the mains supply. The portable deck unit comes complete with an international battery charger: 115/220VAC +/-10%, 50-60 Hz +/-5%. Telemetry power supply: 30V DC (max 0.3A@12 V). Dimensions: 340 x 300 x 160 mm. Weight: 6.5 kg The EA/89 CTD can be interfaced with a portable reader (PDA). In this case, a dedicated programme allows the operator to carry out sensor maintenance and data acquisition in real time. BLUETOOTH Wireless Interface The optional BLUETOOTH wireless interface allows the probe to communicate from any device supporting a compatible Bluetooth™ SPP protocol v1.1. Connection with the probe is protected by means of the unique 8-digit PIN code which identifies each OCEAN SEVEN EA89 probe. The wireless module is activated by means of a dedicated magnetic rotary switch present on the probe top cover.

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STANDARD SENSOR SPECIFICATIONS
The Ocean Seven EA/89 probe can be equipped with the following standard sensors to measure:

The following parameters are calculated from CTD sensor signals (according to UNESCO formulas and recommendations):
• SALINITY, Water Density (SigmaT), Sound Velocity
• FRESH WATER CONDUCTIVITY corrected at 20 °C and 25°C
• OXYGEN % SATURATION to OXYGEN ppm CONVERSION

OPTIONAL SENSOR SPECIFICATIONS
The OCEAN SEVEN EA/89 can be optionally equipped with the following sensors and probes: Highly Precise (0.01% F.S.) Pressure Sensor, Fluorometer, PAR, Transmissomenter, Turbidity Meter⁽²⁾.

Parameter	Range	Accuracy	Range	Time Constant
Pressure (1) Turbidity Chlorophyll a	0..100 dbar 0.03 ..750 FTU 0.02..150 µg/L	0.01% F.S. 0.05 FTU 0.05 µg/L	0.0001 % F.S. 0.005 FTU 0.002 µg/L	50 ms 0.1 s (3) (5) 0.1 s (4) (5)

(1) The Highly Precise (0.01%) Pressure Sensor is based on the stable, floating piezoresistive transducer and the newly developed sensors interface.This sensor cannot be installed if the optional wireless Bluetooth module is installed too.
(2) Only two of the following sensors can be interfaced: Fluorometer, Transmissometer and LICOR LI-193-SA PAR.
(3) SEAPOINT Turbidity meter has 4 measuring ranges: 25, 125, 500, >750 FTU F.S. respectively. Only the IDRONAUT OEM version can be installed on the sensor bulkhead.
(4) SEAPOINT Fluorometer has 4 measuring ranges: 5, 15, 50, 150 ug/L F.S. respectively.
(5) Automatic measuring range selection can be activated on Fluorometer or Turbidity Meter.

ELECTRONIC SPECIFICATIONS:

Real-time and Logging: Interface:   Wire                  Wireless Data memory Supply Voltage Supply Current Operator interface Batteries

8 Hz (depending on the probe sampling method); 12 Hz using REDAS-5. RS232C, RS422 and IDRONAUT FSK telemetry (which requires the Telemetry Portable Deck Unit). Bluetooth™ Class 1 v1.1, SPP compliant range of over 100 m. 512 Mbytes standard can be expanded to 1 GByte. 8.5..36V telemetry; 8.5..18V RS232C; nominal 12V. running: 50 mA@12V; Sleep: 0.025 mA @12V. Optional optical sensors and/or Bluetooth may increase power consunmption to more than 100 mA@12V. friendly menu driven user interface. rechargeable 9.6V 4.5 A/h NiMh battery pack.

PHYSICAL CHARACTERISTICS:
Housing: Dimensions:    housing diameter                      total length Weight:          in air                      in water	200 dbar (POM) 89 mm 765 mm 4.0 kg 2.5 kg

ACCESSORIES:
MANUAL PORTABLE WINCH.	Includes 2-way or 5-way slip ring and it can hold up to 250 m of 5 mm polyurethane jacketed armoured cable or 100 m of 10 mm polyurethane multi-conductor shielded cable
TELEMETRY ARMOURED CABLE - Ø 5 mm - POLYURETHANE	A strain relieved 5 mm polyurethane coaxial jacketed armoured cable type Idronaut - breaking strength: 200 kg - weight per km: 40 kg.
RS232C/RS422 CABLE - Ø 10 mm - POLYURETHANE	Multi-conductor shielded cable - Kevlar amoured - type Idronaut Ø 10 mm - specifically designed for RS422 or RS232C interface. Composed of 3 pairs: one 2x16 AWG and two 2x22 AWG twisted together - breaking strength: 250 kg. Weight: 5,3 kg/100 m (in water); 13 kg/100 m(in air).