Basic Operation & Use
Harness Attachment
WARNING: This manual does NOT cover all information and procedures required to safely dive the O2ptima CM and is NOT a substitute for unit specific training.The Optima CM attaches using…
Oxygen Sensor Calibration
Oxygen sensor calibration should be confirmed prior to every dive and recalibrated as needed. Begin by disconnecting the counterlungs from the scrubber canister. Next insert the supplied calibration caps by…
DSV Operation
The purpose of the DSV (Dive/Surface Valve) is to produce a one way flow of gas through the breathing loop. This is accomplished through the use of two one-way mushroom…
Breathing on the Loop
The number #1 rule for diving a rebreather is to ALWAYS KNOW YOUR PPO2! This can be monitored using the HUD and/or the controller. It is important to check both…
Electronic vs Manual Operation
The Optima CM is a fully electronics controlled rebreather (eCCR), but it is also capable of manual operation (mCCR). When using the Optima CM in eCCR mode, the controller is…
Diluent Injection
Diluent is injected into the breathing loop in one of two ways-either automatically through theADV/MAV, or manually by pressing directly on the ADV/MAV diaphragm.The ADV is a demand valve and…