Central Nervous System Oxygen Toxicity; Maximum Operating Depth - DEEPBLU cosmiq+ Product Manual

SECTION 5 – INSTRUCTIONS FOR USE
During a dive within the no-decompression limit using Standard Air (21% oxygen) the following
information will be displayed on the screen:
• Current time (Time in hours:minutes)
• Water temperature (Temp in °C/°F)
• Current depth (Depth in meters/feet)
• Deepest depth (Max in meters/feet)
• Dive time (Dive Time in minutes)
• No-decompression limit (No Deco in minutes)
• No-decompression limit bar (graphic bar on right hand side)
• Ascent rate bar (graphic bar on left hand side)
• Safety stop time (seconds) and Stop indicator. This will be shown only once COSMIQ
depth of between 3–6 meters or 10–20 feet
During a dive within the no-decompression limit using Nitrox (above 21% oxygen) all of the above
information will be shown in addition to the Nitrox icon

5.2.6 Central Nervous System Oxygen Toxicity

COSMIQ constantly monitors your exposure to oxygen, by estimating the amount of oxygen in
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your body and how it affects your central nervous system (CNS). Your CNS oxygen toxicity level is
calculated in accordance with your exposure to high partial pressure of oxygen (PPO
represented as a percentage ranging from 0% to 100%. Oxygen toxicity levels reaching 100% are
considered dangerous and should therefore be avoided.
If COSMIQ calculates a CNS level of 80%, the alarm will sound. The letters 'CNS' will flash on the
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screen along with the arrow indicator instructing you to ascend to a shallower depth. The alarm
will become more frequent if you do not ascend to a shallower depth and the calculated CNS level
increases to 85% or higher.
In the case of a CNS alarm, you should conduct a safety stop and end the dive immediately.
WARNING: DO NOT ALLOW YOUR OXYGEN TOXICITY LEVEL TO REACH 100%. Doing so may
cause your body to suffer from convulsions, which can lead to drowning.

5.2.7 Maximum Operating Depth

COSMIQ also calculates the safe maximum operating depth (MOD)—a depth limit, below which
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the PPO level in the gas mixture you are breathing may become toxic. The MOD is determined
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based on both the PPO
lead to oxygen poisoning and should therefore be avoided.
You can determine your MOD for an upcoming dive by accessing the oxygen setting screen.
Navigate to Scuba Mode and press the ADJUST button. The MOD will be displayed in the bottom
left corner of the display screen. As you change the oxygen level the MOD will change accordingly.
If you dive below the MOD during a dive, the alarm will sound and 'PO2' will flash on the screen
along with the arrow indicator instructing you to ascend to a shallower depth. The alarm will continue
to sound until you ascend above the MOD.
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limit and the percentage of oxygen you've set. Diving below the MOD may
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detects a
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) levels. It is
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