POSEIDON SE7EN+ - Pre-Dive Procedures Enabled for Decompression Diving; Switching Batteries

Poseidon SE7EN+ User Manual Appendix 3 Page 129
4. Pre-Dive Procedures with a Poseidon
SE7EN+ enabled for Decompression Diving
It is possible to determine whether a rig is congured for decompression diving by examining
the ceiling indicator during the pre-dive routine. The ceiling indicator will be blank for a standard
rig and be lit ash for a SE7EN+ enabled for decompression diving.
48m/60m/100m Trimix
Figure 3-43: Helium conrmation screen
at test 51, showing the question of helium
fraction content in the diluent gas tank.
Figure 3-44: Oxygen conrmation screen
at test 52, showing the question of oxygen
fraction content in the diluent gas tank.
5. Switching batteries
As soon as a battery is inserted into SE7EN the SE7EN settings will updated according to the
limitations given by the inserted battery. These changes take immediate effect and are stored
persistently.
When inserting a green battery SE7EN will set deco enable OFF, set FHe to 0%, set FO2 to
21%, set Max working depth to 40 m in the settings.
On a unit with the blue 48m, 60m or 100m Trimix battery installed, the diver will be prompted to conrm
the helium fraction (pre-dive test 51) and O2 fraction (test 52) of the diluent mixture. This test occurs
immediately after the mouthpiece ‘CC’ test (test 50), and will occur only if the SE7EN+ is congured for
decompression diving, or if the congured diluent is not air (the test is not performed if the rig is not
congured for decompression diving and the diluent is already congured as air).
The M28 will display ‘is DIL Helium fraction nn%’ during test 51 where ‘nn’ is the assumed Helium
fraction. The diver is prompted to conrm YES or NO using the M28 buttons. During test 52 the
procedure is repeated but now the diver is supposed to conrm the Oxygen content in the diluent.
See gures 3-43 and 3-44.
If the helium or oxygen fraction is incorrect, the diver can either:
1. Use the Reef app link or the M28 to alter the SE7EN DIL conguration in the Dive cong
menu. The gas content can be altered while in test 51 but not after. to change it to the correct
value. The new value will appear in the LCD.
2. Let the test timeout (two minutes) at which point the rig can be shut down.