User manual
Poseidon MKVI User Manual
Chapter 1
Page 7
The Learn Cycle Activation Button: Just above the Learn Cycle indicator light is a button.
Pressing the button will manually initiate a Learn Cycle. It may be pushed at any time during a
regular charge cycle to initiate a Learn Cycle.
The System will require a Learn Cycle if the smart battery is fully depleted; if it has been more
than 90 days since the last Learn Cycle; or if the cell has had more than 20 charge cycles since
the last Learn Cycle. The system will recommend a Learn Cycle if it has been more than 45
days since the last Learn Cycle or if the cell has had 10 or more charge cycles since the last
Learn Cycle.
Charge Cycle Indicator Light: The right-most light on the charger is the charge cycle indicator,
and it has the following meanings when plugged in with the smart battery inserted:
• Off: The battery is being discharged as part of a Learn Cycle.
• Alternating Red and Green ashing once per second: No battery detected.
• Both Red and Green ashing: Battery is being charged (more green as battery is charged).
• Red continuously on: Charging has failed (may require a Learn Cycle).
• Green continuously on: Charge cycle completed successfully, battery is fully charged.
While charging, the light will ash rapidly when the battery is discharged, and will ash more
slowly as the battery becomes more charged. As a general rule of thumb, 1 minute on the
battery charger in standard charge cycle mode will load 10 minutes of charge into the battery.
Thus, if you charge while taking a 30 minute break between dives, you will have added 5 hours
of dive time to the battery.
Leaving the Smart Battery in the Charger: Although it is acceptable to leave the smart
battery in the charger when not in use, it is recommended that the battery be left attached to
the Poseidon MKVI after a successful charge for the following reasons:
• If power to the charger fails at any time, then having the battery in the charger will actually
deplete the cell – approximately as fast as if the battery was installed in the rig and the rig
powered up.
• Storing the battery in the Poseidon MKVI enables the depth sensor and the wet switch on
the back of the primary display. If someone wearing the MKVI accidentally falls into the
water, the system will automatically power up the rig, enhancing the probability for survival
of the user. This is only possible if the battery is charged and stored in the rig.
• Storing the battery in the Poseidon MKVI reduces the probability of debris entry and impact
damage to the battery contacts in the electronic module.
Long-term storage
Allowing the smart battery to sit for long periods of time on-shelf without recharge will lead to
premature failure of the battery. The best storage method, if the battery will not be used for a
substantial period of time, would be to top off the charge once a month by running it on the
normal charge cycle in the desktop charger. If this is not possible, then the best long term
solution is to leave the battery on the charger (with the power to the charger turned on). The
method of monthly top-off of charge, however, will maximize the battery life. Store the battery
in a cool, dry environment.
Decompression data
In the Poseidon MKVI rebreather, individual user decompression data are stored in both the
backpack computer and the smart battery computer. Thus, every user carries their decom-
pression information with them when they remove the battery. If the same user dives the same
rig, then the diver will receive repetitive dive surface credit for the time spent on the surface
(even if the battery is removed from the rig between dives). The decompression algorithm is a
9-compartment real-time implementation of the industry-proven DCAP decompression engine.
It is strongly recommended that you use the same battery in the same Poseidon MKVI for any
repetitive series of dives. Once sufcient surface credit has cleared the decompression model
entirely (generally 24 hours of no diving) then you can swap batteries between rebreathers
without risk.
WARNING:
Misuse of this feature is NOT recommended.