User manual

Poseidon MKVI User Manual
Chapter 2
Page 41
Two things are worth noting in Figure 2-5. First, the bar graph along the top of the LCD screen
is a progress bar, indicating how much time remains before the PST is complete, or how much
time is left for the diver to complete some required action. Second, the circle with the diagonal
line through it in the upper-right corner of the screen is the “Do Not Dive” symbol, which is
displayed throughout the entire pre-dive process. As long as this symbol is displayed, the dive
should not be started.
If a test fails, the routine is halted at the failed test, and the value displayed on the right side of
the screen changes from a countdown timer to an error code (see Figure 2-6). Both values (the test
number and the error code). If the wet-switch is connected (i.e., wet), then the rig will not
power-down, and the system will inject excessive oxygen intermittently, in case a diver is
breathing on the loop.
When one of the PSTs fails, consult Appendix 1 to understand further what the failed test
means. In most cases, the rst thing to try is to run the automatic pre-dive routine again by
activating the wet switch on the back of the Primary Display. If the same test fails again with
the same error code, wait for the electronics to power-down, then eject and re-seat the battery
(see Chapter 1). If the automatic pre-dive routine persistently fails any of these tests, contact a
Poseidon Tech Center for assistance. In general, repeated failure of any one of these automated
tests indicates a problem with the Poseidon MKVI that will not be serviceable by the user.
DANGER:
Do not attempt to conduct a dive until the system has successfully
completed all of the pre-dive tests. Diving in spite of a failed
pre-dive test is extremely dangerous, and could lead to serious
injury or death.
Closed Circuit mouthpiece position (test 39)
Test 39 (mouthpiece CC position test) is automatically passed provided the mouthpiece was
left in the CC position following the previous steps. If, for some reason, the mouthpiece is not
in the CC position when Test 39 appears on the screen, the mouthpiece vibrator will activate
along with the HUD and battery LEDs and audio alarm with a high frequency tone. The letters
“CC” will appear in the upper-left corner of the LCD screen and will ash until the mouthpiece
switch is placed in the CC position (Figure 2-6B). The system allows the diver up to two
minutes to make this switch. The “Closed-Circuit” icon will continue to display on the LCD until
Test 39, when the mouthpiece needs to be switched to the open-circuit (CC) position.
If the mouthpiece appears to be in the closed-circuit position, but Test 39 does not pass, then
make sure that the mouthpiece switch is fully in the CC position. If the test still will not pass,
then make sure the HUD is positioned correctly on the mouthpiece, and is not twisted or oth-
erwise moved from its proper position. If no amount of repositioning of the mouthpiece lever or
HUD allows the system to pass Test 39, then contact an authorized Poseidon Service Center.
Figure 2-6B. Introduce test 39.
Pre-Dive Tests
Once the PST tests have completed the dive manager will send the MkVI into Pre-Dive mode.
A very brief summary of these pre dive tests is as follows:
• Test 39: Mouthpiece CC test
• Test 40: Decompression status verication
• Test 41: Scrubber installed conrmation
• Test 43: Mouthpiece OC test
• Tests 44-45: Sufcient oxygen and diluent to go diving test
• Test 48: Sufcient battery power to go diving test
• Test 49: Positive pressure loop test (PPLT)
• Test 50: Mouthpiece CC test
• Test 53: O2 calibration test
• Test 54: Open Circuit regulator test
• Test 55: Service interval test