POSEIDON SE7EN+ - Setting up Decompression Configured SE7 EN; Decompression Permitted; Decompression Enabled; Deco Version

Poseidon SE7EN+ User Manual
Appendix 2
Page 90
Decompression enabled
Once a battery module that allows decompression is inserted into a SE7EN+ rebreather, the
user can then select whether the rig is enabled for decompression before any particular dive. If
this parameter is not set, then the battery behaves as though it is a non-decompression rig.
This feature allows the diver to decide whether the rebreather should function as a decompres-
sion-enabled rebreather, or as a standard no-decompression rebreather, on any particular dive.
This parameter is altered through the conguration tool.
40m Deco Version
With the yellow Deco 40m battery module, the user may use the Reef app. or M28 to enable
or disable decompression diving.
48m/60m/100m Deco Trimix Version
As with the yellow Deco 40m battery module, the blue Deco 48m, the white Deco 60m and
black 100m Trimix battery modules allow the user to enable or disable decompression using
the conguration software tool. In addition, these battery modules allow the user to alter the
diluent gas mixture.
Using either the 48 or 60m Trimix batteries the SE7EN+ will only accept “normoxic” diluent
mixtures (a minimum of 16% oxygen). Helium content is limited to 0-84% and N2 to 0-80%.
Moreover, the blue Deco 48m Trimix battery module allows dives to a maximum of 48 meters
and White Deco 60m Trimix to 60 meters. Using the 100m Deep battery the Poseidon SE7EN+
will accept any diluent mixture with an oxygen fraction equal to or higher than 1%.
Maximum TTS
All technical battery modules include a unique feature: the ability for a diver to set a maximum
TTS value. This feature makes it easier to plan decompression dives, because this value deter-
mines when the system warns the diver that the limit has been reached. The generated alarm
response will be similar to the alarm shown when the diver exceeds the maximum working
depth of the rig. This value also affects the way the controlling resource algorithm (CRA) works,
as described below. This parameter is altered through the conguration tool.
Decompression permitted
The SE7EN+ can be set up differently for different types of dives through the Reef app. or M28.
Look at Poseidon website, www.poseidon.com
The Blue, Yellow, White and Black batteries are congured by the factory to allow decompres-
sion diving. Once a battery module congured for decompression diving is inserted into a
SE7EN+ rebreather, a parameter in the rebreather is set to allow (optionally) decompression
diving. Only Poseidon can set this ‘Decompression permitted’ parameter. Without the proper
battery for decompression diving, none of the parameters described below can be altered.
3. Conguring the SE7EN+ for decompression diving
Decompression and TTS settings can be altered at any time until dive start meanwhile gas mixtures
only can be altered until test 50 has been reached. When decompression is enabled, the “ceiling”
indicator will be lit on the LCD screen.