User guide

Chelsea Technologies Group
FAST
tracka
User Guide HB179 Issue 7.0
Page
12
of
47
Data Download 3.6.
Please note that the dark chamber ports, if attached, are delicate. Ensure that they are not
struck or impacted during submersal. As well, although the instrument is equipped with auto
PMT shutdown when exposed to high ambient light, it is recommended that the instrument is not
operated under direct sun light.
3.4 REPETITIVE IMMERSALS/ DECK CONSIDERATIONS
Using the magnet switch removes the need to connect the host computer each time the
instrument needs to be turned on or off. All setup parameters will remain at their previous
settings. Thus, for profiling operations, the deck operator simply has to trigger the magnet switch
and ensure that the instrument is either on or off as needed by waiting for the indicator LED
codes to appear. Communication through the Deck Unit may as well be used to shut the
FAST
tracka
off through software control.
It is important not to place undue strain on the cables and connectors attached to the FAST
tracka
instrument. As with any bulkhead connector or cabling used in oceanographic instruments,
undue care in attaching and disconnecting cables will either damage the wiring or affect the
sealing ability of the connector.
Battery charging and downloading data must still be performed periodically by attaching
charging and host cables to the instrument. The design of the instrument allows charging and
downloading to take place simultaneously and independently while the instrument is mounted to
the lowering fixture as long as the cable access in the can guard is not obstructed. Please refer
to the sections for Charging Requirements 3.11 and Data Download 3.6 for information on these
topics.
3.5 HOST MODE
Host mode involves connecting a computer or other intelligent machine to the instrument in
order to program, modify, or otherwise control the instrument. Host mode may be used for:
• downloading data from flashdisk storage;
• changing operational parameters;
• initiating a self calibration routine;
• real-time observation of instrument data (i.e. Desktop mode);
• instruction of instrument operation;
• demonstration of instrument performance;
• bench-top measurements;
• and service routines.
Host mode allows the user to power the instrument from the host cable when the instrument is
disconnected from the battery can. The power management systems inside the instrument
automatically choose between power sources. Host power may also be connected while the
battery can is connected without damage.