General Description Of Cts3 Provor Float; Prov-Carbon Evolutions; Software Interface; Mechanical Interface With Oxygen Sensor - Kannad PROV-CARBON Manuel Utilisateur

USER MANUAL / MANUEL UTILISATEUR

2. GENERAL DESCRIPTION OF CTS3 PROVOR FLOAT

2.1. PROV-CARBON evolutions

The main evolution of PROV-CARBON with regards of CTS-3 PROVOR are hardware and software
modifications required by:
• installation of an ANDERAA oxygen sensor (Optod 3830);
• implementation of a C-ROVER sensor used for transmittance 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 the oxygen and C-ROVER sensors;
• the IRIDIUM modem / GPS antenna link.

2.3. Mechanical interface with oxygen sensor

The oxygen sensor is mounted on the hydraulic end cap to the place initially provided on CTS-3 for an
additional sensor. To enable this installation, an extension has been installed between the hydraulic end
cap and the lower bladder. Consequently, the lower bladder of the float has been slightly extended.

2.4. C-ROVER sensor link interface

The C-ROVER 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.
A hole has been drilled into the ballast and into the damping disk to enable the route of the cable connecting
the C-ROVER to the float.

2.5. Iridium modem / GPS link interface

A modem has been added on the rack of the float.

2.6. Satellite link interface

Link between satellite and Iridium modem is carried out by an IRIDIUM / GPS antenna.

2.7. Density Control System

Descent and ascent depend upon buoyancy. PROV-CARBON 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 PROV-CARBON's
density control system in section

2.8. Sensors

PROV-CARBON is equipped with precision instruments for measuring:
• pressure, temperature and salinity with the SEABIRD SBE41CP CTD sensors;
• dissolved oxygen with Oxygen Optod AANDERA 3831 sensor;
• transmittance with the C-ROVER sensor.
Specifications of these sensors are provided in section

2.9. 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
PROV-CARBON 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.

2.10. CPU Board

PROV-CARBON
8. page 27.
7. page
PAGE : 2 / 70
DATE : 20/12/2007
INDEX : A
REF. : DOC07220
26.