Poseidon SE7EN User Manual
Appendix 3 Page 112
Managing open circuit bail out with M28
In case your M28 shows an ABORT to Open Circuit you are mandated to follow the instruction
and warning and go to OC by changing your mouthpeice position.
The Dive Menu
During normal conditions diving in Closed circuit the menu in M28 SE7EN mode will only show
a menu structure that consists of Settings, Apps, Setpoint and Dive config. When aborting to
OC the menu content will change and also contain a new item “Gas Select”.
Managing gases
Per predefault the selected OC gas will alwas be your SE7EN predefined diluent. When in OC,
meanwhile performing a bailout, the diver now also have the possibility to alter the OC bailout
gas to any of the confugured gases by acessing the menu structure and selecting OC Gas
select. Then select any of the predefined and eneabled gases in the list. The selection can
always be verified from the DIve veiw by altering the center icon, see figure 3-35.
This selection will remain as long as you stay in the OC mode. If you decide to go back to CC
the gas will automatically be restored to your SE7EN predefined diluent. This means that if you
again decide to go to OC you need to alter the OC Gas to what you intend to breathe at this
stage.
Figure 3-34.
OC and CC mode menu
Changing settings in your SE7EN through the M28
With the M28 its easy to alter the settings within the SE7EN unit meanwhile on land and con-
nected to the SE7EN. Simply enter the system menu and select “Edit SE7EN reg”. Once
selected you can change several parameters that previously only were able to be altered
through the rbConfig tool.
Figure 3-36.
Edit SE7EN reg.
The alterations and changes that you do through the M28 in the SE7EN settings will not take
effect until you have restarted the SE7EN and completed a full pre dive test sequence.
If you by coincidence select a gas with a to high or to low PO2 at the existing depth the M28
will warn you by overlaying a message window covering parts of the center icon saying GAS
to HIGH/LOW ppO2.
Figure 3-35.
Gas to HIGH/LOW