User manual

this setting, the MMP Unpacker produces one file per profile when the raw data from the flash
card is processed.
NOTE
The default value for Profiles / file set is ‘1’ in MMP firmware version 3.10 (and higher) to
support the optional Underwater Inductive Modem (UIM) interface. For more information
about the UIM interface, see Appendix in this User Manual.
Stops Parameters
The Stops parameters define the limits of each profile and guide the system in their
detection. The MMP depends primarily on pressure measurements made by the CTD to detect
the end of a profile. However, system status and elapsed profiling time are also monitored. This
layered detection approach allows profiling to continue independent of the CTD.
The shallow and deep pressure limits or “stops” are ambient pressure levels (dbars)
between which the operator intends the MMP to travel. When the ambient pressure becomes less
than the shallow pressure stop on an upward profile or greater than the deep pressure stop on a
downward profile, the system stops profiling. The sensors continue to log for two minutes before
the system stops logging and moves the sensor data to the flash card. Ambient pressure is
determined by querying the CTD. The shallow and deep pressure stops are the primary inputs the
system uses to detect the end of a profile. Typically, a profile is terminated based on the pressure
stops.
Shallow Pressure <S>
Shallow pressure is the intended “top” of the profiling range. The system stops profiling
on an upward profile when the ambient pressure becomes less than the shallow pressure limit.
Ambient pressure is determined by querying the CTD. The shallow pressure limit is ignored
during downward profiles.
Allowed range: Deep pressure to 0.0 dbar.
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