POSEIDON SE7EN+ - Page 109

Poseidon SE7EN+ User Manual Appendix 3 Page 99
Open circuit mouthpiece position (Test 43)
Test 43 (mouthpiece OC position test) is automatically passed provided the mouthpiece was
left in the OC position following the previous steps. If, for some reason, the mouthpiece is not
in the OC position when Test 43 appears on the screen, the audio alarm with two frequency
tones will activate and the text “Switch mouthpiece to Open Circuit” will appear in the informa-
tion eld (Figure 2-7). There will be two beeps. If you do not repsond to the action required the
beep will be repeated and eventually turn on constantly 20 seconds before a test-user-notresponse-
time out. The system allows the diver up to two minutes to make this switch. The “Open-Circuit”
icon will continue to display until Test 50, when the mouthpiece needs to be switched to the
closed-circuit (CC) position.
If the mouthpiece appears to be in the open-circuit position, but Test 43 does not pass, then make
sure that the mouthpiece switch is fully in the OC position. If the test still does not pass, then
make sure the HUD is positioned correctly on the mouthpiece, and is not twisted or otherwise
moved from its proper position. There are two magnets inside the mouthpiece which
are used together with a sensor to determine the mouthpiece position. If no amount of reposi-
tioning of the mouthpiece lever or HUD allows the system to pass Test 43, then contact an
authorized Poseidon Service Center.
Fig ur e 2-7.
Test 43 Switch mouthpiece to OC
position, displaying information to the
user that the mouthpiece must be placed
in the Open-Circuit position.
IMPORTANT:
Do NOT adjust the mouthpiece position again after completing
Test 43, until instructed to do so at Test 50. In order to complete
Test 49 (positive pressure loop test) successfully, the mouthpiece
must remain in the Open-Circuit (OC) position.
Canister Good conrmation (Test 41)
When using the SE7EN+, test 41 requires the user to
conrm by the wet switch wet/dry sequence that:
A They have a good canister installed
B It contains sufcient unused absorbent to
complete the dive.
On the M28, this becomes visible on the display (gure 2.6C) when the question ‘Have you
installed a good Canister?’ is shown on the screen. The diver is then prompted to select “YES”
or “NO” by pressing the appropriate button. NOTE: This test is not automatic and is intended
as a reminder for the diver. By conrming test 41, the diver acknowledges that he/she has
installed a good canister prior to powering up the Poseidon SE7EN+.
Figure 2-6C.
Test 41 (Canister Good conrmation).