User manual

Table Of Contents
Profiles/File Set <F>
A deployment with many short profiles may exceed the flash card file limit before the
battery expires. For deployments that include more than 1,300 profiles, use Profiles per File Set
to multiplex an operator-defined number of profiles into a single data file and maximize flash
card file storage capacity. For example, setting Profiles/File Set to 10 places profiles 0 through 9
into a single data file on the flash card. When Profiles per File Set changes, the firmware
recalculates and redisplays the battery endurance estimate.
Do not set this value higher than necessary. The firmware displays a message if a setting
other than 1 is entered but not required based on the programmed deployment. The firmware also
displays a warning if the programmed deployment will exceed the flash card file limit before the
battery expires.
Regardless of the Profiles per File Set setting, the MMP Unpacker produces one file per
profile when the raw data from the flash card is processed. Accepted range is 1 to 1018.
NOTE
If using the Underwater Inductive Modem (UIM), set Profiles/File Set to 1 (real-time
communication does not support multiplexing).
Stops Parameters
Stops parameters define limits that end a profile. The MMP depends primarily on CTD
pressure measurements to detect the end of a profile. The pressure measurements acquired
through the CTD are time tagged and stored in the engineering data file. This time and pressure
information is used to dynamically calculate the pressure rate, dP/dt. Status and elapsed profiling
time are also monitored. Typically, a profile is terminated based on the pressure limits.
NOTE
The dP/dt calculation is not performed for the first 3 minutes and 30 seconds of a profile. The
pressure measurements and time tags are kept in rolling, indexed buffers so that the mooring
motion filtering requirement of the calculation can be verified. Failed pressure acquisitions are
flagged and not used in the calculation.
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