Varying O2 FLOW?

Danil

Maybe in should be done in the pre-dive checks just like with the SCR Dolphin? I actually thought this was the case , i do it every time on my mCCR Dolphin. A bit anal perhaps...

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Dan Nilsson, Meg 67

Carl Wern

Hi there Håkan!

I am glad that you didn´t tox and was able to correct the mix. I don´t know what they told you when you got trained on your Classic Kiss, but I would check the gas flow every dive day. I takes about 5 minutes, but can save your whole dive and perhaps your life. It is worth those extra five minutes to test the gas flow before the dive.

I have built my own MCCR, "The Hunchback", with and without CMF (constant mass flow or as some people call it "kiss style") and I have had my share of dive incidents. Nowdays I always check the gas flow before I enter the water at the dive cite. Just to be sure that nothing has happend to the orrifice, the hose or the first stage. I always make sure that the flow is about 0.7 liters per minute, slightly below my O2 metabolic rate, just to be on the safe side. It does not create more work for me, it just adds a bit more safety margin to the O2 flow.

According to my own experience, the most critical failure point in a CMF machine is the orrfice area. It can get clogged for various logical reasons and for various unlogical reasons. Best way to be safe is to always check the the flowrate and to constantly monitor those life saving PPO2 displays! By the way, don´t forget to test your sensors before entering the water........
Dive safe, be informed, be alive!

prharris

I have 'aqcuired' a flow meter off a medical O2 set, but it has a control valve built-in.
does anyone know if I was to open the valve fully, whether I'd be able to read the flow rate of my Kiss - given that I can plumb it in?

r
Paul