1.7 INTERNAL BATTERIES
The OCEAN SEVEN 310 probe housing has in its upper part enough space to accommodate an internal
battery pack. This is used whenever the probe carry out unattended acquisition cycles without the
connection in real time with a surface unit (PC). Different types of battery can be installed in the CTD
housing:
➢ 1x Size “A” Li-SOCI2 Lithium-thionyl chloride non rechargeable battery 3.6V, 2.4Ah
➢ 3x Size “AA” 1.5V Alkaline non rechargeable battery assembled in a single pack 4.5V
➢ 1x Size “C” Li-SOCI2 Lithium-thionyl chloride non rechargeable battery 3.6V, 8.4Ah
➢ 1x Li-Ion rechargeable IDRONAUT custom battery pack 3.7V,4.5 Ah
Whenever the OS310 operates in Timed, Burst and Conditional modes, the battery endurance is
considerably extended because the CTD enters a deep sleep mode between acquisitions. When the
probe is not used for long periods (e.g. 2 weeks or more), we suggest disconnecting the internal battery
pack connector from the probe electronics or removing the internal battery pack from the probe to
prevent the internal batteries from damaging the probe due to battery acid leakage. This is why the
OCEAN SEVEN 310 is shipped without batteries installed. Please be aware that it is not possible to
recharge the battery pack when it is installed inside the probe
1.8 EXTERNAL SUBMERSIBLE RECHARGEABLE BATTERY PACKS
To overcome the limited autonomy of the internal battery pack, IDRONAUT developed two external
submersible rechargeable battery packs that considerably increase the probe operating autonomy.
❖ Submersible rechargeable battery pack (Ø 75 x 315 mm POM), 1500 m max depth operation.
❖ Submersible rechargeable battery pack (Ø 66 x 315 mm Titanium), 7000 m max depth operation.
The external battery pack is held by the probe by means of a POM flanges and connected to the RS232C
input/output bulkhead connector by means of a submersible cable. The external battery pack is
internally protected by means of a multi-fuse.
Note
The presence of the external battery pack does not interfere with the installation of the internal battery pack. The
CTD drains energy from the higher voltage battery pack.
1.9 MAGNETIC POWER ON/OFF SWITCH
The OCEAN SEVEN 310 probe is equipped with a magnetic power ON/OFF
switch, which allows the operator to effectively switch ON and OFF the
probe. The probe is also able to switch on and off by itself whenever it
performs self-recording acquisition cycles and uses the internal and/or
external battery pack.
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