Rebreather World - View Single Post - Learning from our mistakes (The not-an-accident thread)

Andy Del · 17th October 2007, 20:48

All on Classic KISS

Jumped in with O2 turned off. Felt something was not right swimmming to anchor line and saw 0.12 on displays when checking. turned on O2, flushed loop, rested at surface (swearing at myself) and did the dive. check O2 on every dive.

Jumped in with Dil off. Felt rather sillly not being able to breathe on descent, and finding it hard to move as drysuit got all squished onto me. Check dil on every dive.

CO2 isssue - loop gas suddenly started to feel very hot, like breathing from a hair drier (to quote a great man). Stopped moving, rested, and slowly went back to anchor line trying to be aware of signs of hypercapnea. Don't use sorb designed for anaesthetic machine (it was Draegersorb 700 - I think).

75m dive, O2 spikes - the KISS valve was feeding too much gas. Feathered cylinder valve, copleted the dive normally. Extra O2 flow is good on ascent however! Needed to service KISS valve.

24m dive - no O2 flow through KISS valve. Manually added O2 every X breaths. Was far too interested in the 'killer GWS' (based on media reports) I was diving with. It turned out to be a sunfish. Needed to service KISS valve properly...

48m dive - low battery warning on VR$, gas escaping from loop on exhale, wing inflator auto inflating. Sigh. Scratched head over bubbles from DSV - determined I had only half turned the open/close knob. Feeling like a knob, I fixed this, but was unsure how much gas escaped and how much, if any water had got into the loop. Battery warning, I deployed my tables and bottom timer, in case it was needed. Auto inflating - gave me the right $hits. Second time it had malfunctioned. At this point, I canned the dive, did a normal ascent, deco and got into the cheese and crackers early. User maintenance was at fault here for two items, and user error for the other.

17th October 2007, 20:48	#10 (permalink)
Andy Del Classic KISSer Current Rebreather/s: Sport Kiss Classic Kiss Other Rebreather/s: Join Date: Feb 2005 Location: Australia, Sunny Sydney Posts: 403	Re: Learning from our mistakes (The not-an-accident thread) All on Classic KISS Jumped in with O2 turned off. Felt something was not right swimmming to anchor line and saw 0.12 on displays when checking. turned on O2, flushed loop, rested at surface (swearing at myself) and did the dive. check O2 on every dive. Jumped in with Dil off. Felt rather sillly not being able to breathe on descent, and finding it hard to move as drysuit got all squished onto me. Check dil on every dive. CO2 isssue - loop gas suddenly started to feel very hot, like breathing from a hair drier (to quote a great man). Stopped moving, rested, and slowly went back to anchor line trying to be aware of signs of hypercapnea. Don't use sorb designed for anaesthetic machine (it was Draegersorb 700 - I think). 75m dive, O2 spikes - the KISS valve was feeding too much gas. Feathered cylinder valve, copleted the dive normally. Extra O2 flow is good on ascent however! Needed to service KISS valve. 24m dive - no O2 flow through KISS valve. Manually added O2 every X breaths. Was far too interested in the 'killer GWS' (based on media reports) I was diving with. It turned out to be a sunfish. Needed to service KISS valve properly... 48m dive - low battery warning on VR$, gas escaping from loop on exhale, wing inflator auto inflating. Sigh. Scratched head over bubbles from DSV - determined I had only half turned the open/close knob. Feeling like a knob, I fixed this, but was unsure how much gas escaped and how much, if any water had got into the loop. Battery warning, I deployed my tables and bottom timer, in case it was needed. Auto inflating - gave me the right $hits. Second time it had malfunctioned. At this point, I canned the dive, did a normal ascent, deco and got into the cheese and crackers early. User maintenance was at fault here for two items, and user error for the other. __________________ Yellow - the colour of greatness!
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