Diluent Flush & O2 autoinject

Terry · 18th April 2006, 18:00

When doing a diluent flush at depth, for whatever reason, lets say to check the sensors for sanity - how do you keep the O2 from autoinjecting and screwing the whole thing up?

I know there is about 6 seconds between injection cycles, but it may take you more than 6 seconds to perform the whole operation and get a reading, by that time the sensors have noticed a drop in PO2 below the setpoint (1.3) and have begun to squirt O2 back in.

Do you switch to the low setpoint? Wouldn't that set off the alarms?

***ScubaDadMiami*** · 18th April 2006, 18:30

Select a lower setpoint, flush, then manaully add back O2 to the range that you want and change the setpoint again, or just change back the setpoint and allow the unit to get you back there.

18th April 2006, 18:00	#1 (permalink)
Terry New Member Current Rebreather/s: Inspiration Vision Other CCR Other Rebreather/s: Inspiration Vision Other CCR Join Date: Mar 2006 Location: Atlanta Posts: 88	Diluent Flush & O2 autoinject When doing a diluent flush at depth, for whatever reason, lets say to check the sensors for sanity - how do you keep the O2 from autoinjecting and screwing the whole thing up? I know there is about 6 seconds between injection cycles, but it may take you more than 6 seconds to perform the whole operation and get a reading, by that time the sensors have noticed a drop in PO2 below the setpoint (1.3) and have begun to squirt O2 back in. Do you switch to the low setpoint? Wouldn't that set off the alarms?
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18th April 2006, 18:30	#2 (permalink)
*ScubaDadMiami* Moderator Current Rebreather/s: Optima Other Rebreather/s: Join Date: Sep 2005 Location: Florida, USA Posts: 1,896	Re: Diluent Flush & O2 autoinject Select a lower setpoint, flush, then manaully add back O2 to the range that you want and change the setpoint again, or just change back the setpoint and allow the unit to get you back there. __________________ Howard Packer IANTD CCR Instructor Miami Beach, Florida CCRDiveTraining.com
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