Poseidon SE7EN User Manual
Appendix 3 Page 117
Safe diving with the Poseidon SE7EN
• NEVER hold your breath when breathing underwater!
• ALWAYS change the CO
2
absorbent cartridge whenever the oxygen cylinder is refilled or
replaced.
• ALWAYS remove the sponge from the top and bottom of the CO
2
absorbent cartridge
after every dive and squeeze as much moisture out of the sponge as possible. It is
extremely important to allow this sponge to dry as much as possible before starting a
new dive.
• If you feel the mouthpiece vibrate for more than a brief pulse, then change the mouth-
piece position NOW!”
• If you hear the audio alarm, IMMEDIATELY check the LCD display and prepare to
terminate the dive.
• If the Heads-Up Display light on the mouthpiece is STEADY ON, then ASCEND at a safe
and controlled rate to the surface.
• If the Heads-Up Display (HUD) light on the mouthpiece FLASHES, then STOP, look at the
LCD screen. A short single flash is a reminder to you to keep track of your PO
2
, which is
shown in the upper left field of the display. If there is a problem, the HUD light will
continue to flash, and there may be a symbol in the upper right field of the display
flashing to indicate the nature of the problem. For example, the directional arrows advise
you to go up (ascend) if you need to end the dive or if you need to go shallower; or go
down (descend) if you have ascended above a required decompression ceiling. Other
IMPORTANT:
Do NOT remove the battery while the electronics system is active.
Failure to complete a proper shut-down procedure will cause
the battery CPU to remain active, and drain the power supply
unnecessarily.
fields on the display may flash to indicate what the problem is. More information on the
functionality of the display is presented in Chapter 3.
• When in doubt, bail out - switch to open-circuit (OC) and ascend in a controlled manner
to the surface.
• The default setpoint control algorithm is designed to allow for hands-off control of the
system PO
2
during all phases of a dive. The Poseidon SE7EN uses a proprietary method
that begins with a default control setpoint on the surface of 0.5 bar and gradually
increases PO
2
to a maximum automatic value of 1.2 bar at a depth of 15 m / 50 ft.
Beyond this depth the system will automatically control to a setpoint of 1.2 bar to the
maximum operating depth of the rig at 40 m.
