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USER MANUAL / MANUEL UTILISATEUR
2. GENERAL DESCRIPTION OF CTS3 PROVOR FLOAT
2.1. PROVBIO-B evolutions
The main evolution of PROVBIO-B with regards of CTS-3 PROVOR are hardware and software
modifications required by:
•
implementation of a C-ROVER II sensor fitted with transmittance measurement sensor, irradiance
measurement sensor and ECO-Triplet sensor used for backscattering, chlorophyll and CDOM
measurements;
•
use of an IRIDIUM satellite bi-directional vector of transmission;
•
location of the equipment by GPS system.
2.2. Software interface
The CPU PCB is fitted with a new embedded software taking into account
•
the supplementary inputs of C-ROVER II sensors;
•
the IRIDIUM modem / GPS antenna link.
2.3. C-ROVER II sensor link interface
The C-ROVER II sensor is mounted along the hull of the float and fixed by two collars.
The hydraulic end cap has been modified to mount, on the float side a SUBCONN MCBH-4-FS-AS
connector, on PCBs side a SUBCONN MCBH-4-FS-SS connector. Consequently, the lower bladder of the
float has been slightly extended.
A hole has been drilled into the ballast and into the damping disk to enable the route of the cable connecting
the C-ROVER II to the float. A notch has been made in the damping disk to position the C-ROVER II.
2.4. Iridium modem / GPS link interface
A modem has been added on the rack of the float.
2.5. Satellite link interface
Link between satellite and Iridium modem is carried out by an IRIDIUM / GPS antenna. This antenna
replaces the Argos antenna initially installed on PROVOR CTS-3.
2.6. Density Control System
Descent and ascent depend upon buoyancy. PROVBIO-B is balanced when its density is equal to that of
the level of surrounding water. The float has a fixed mass. A precision hydraulic system is used to adjust its
volume. This system inflates or deflates an external bladder by exchanging oil with an internal reservoir.
This exchange is performed by a hydraulic system comprising a high-pressure pump and a solenoid valve.
The interested reader is referred to a more detailed description of the operation of PROVBIO-B's density
control system in section
2.7. Sensors
PROVBIO-B is equipped with precision instruments for measuring:
•
pressure, temperature and salinity with the SEABIRD SBE41CP CTD sensors;
•
transmittance, irradiance, backscattering, chlorophyll and CDOM with the C-ROVER II sensor.
Specifications of these sensors are provided in section
2.8. Data transmission
While on the surface, stored data are sent to the IRIDIUM satellite system via Iridium modem and antenna.
The transmitter has a unique ID assigned by the modem IMEI number and the number of its associated SIM
board. This ID identifies the individual float. The IRIDIUM / GPS antenna is mounted on the top end of the
PROVBIO-B float and must be above the sea surface so the that the transmissions be sent to the satellites.
The sensitive element of GPS is mounted at the top of the antenna while the IRIDIUM radiated part is
mounted below the bulge.
2.9. CPU Board
This board contains a micro-controller (or CPU) that controls PROVBIO-B. Its functions include
maintenance of the calendar and internal clock, supervision of the depth cycling process, data processing
and activation and control of the hydraulics.
PROVBIO-B
8. page
29.
7. page
27.
PAGE : 2 / 72
DATE : 26/03/2008
INDEX : A
REF. : DOC08018
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