Divetech Cayman
Contributor
Hi Fabio,
To begin with, the article was written for laypersons, so perhaps the language used isn't as precise as what you may like. However when an article for this audience gets too technical, then people fail to understand it.
Nothing in this article is inaccurate. Like I said, it was vetted by several professionals with vast expertise in these fields.
The 1st stage regulator on these is fixed, meaning it does not compensate for increases in ambient pressure. It will always be, for arguments sake 10 bar. The actual pressure of the 1st stage will be the difference between the 1st stage pressure and ambient pressure. If we were at 4 bar, then the IP coming out of the reg would be 6 bar, which of course is less than it is on the surface at 10 bar.
I'm very curious how you can disagree with this, and if you still do, I'm curious as to your explanation of how an mCCR works when one is at depth?
Thanks!
Tony
To begin with, the article was written for laypersons, so perhaps the language used isn't as precise as what you may like. However when an article for this audience gets too technical, then people fail to understand it.
Nothing in this article is inaccurate. Like I said, it was vetted by several professionals with vast expertise in these fields.
That is not incorrect. If we were to add the same volume of oxygen to the loop at depth as we did at the surface, we would certainly be hyperoxic. We do need to physically add less volume of oxygen as we get deeper. On an eCCR this means the solenoid opens less often or for shorter durations. On the mCCR the flow is limited by the first stage regulator.which means we need to add less oxygen into the loop This is incorrect
Again I''m not sure how you can claim this isn't the case. Do you dive an mCCR by chance? As we get deeper, the volume of oxygen coming out of the orifice gradually decreases relative to depth. Again if this did not happen, we'd be hyperoxic at any depth below 6m.the ‘trickle’ of oxygen is automatically limited based on the increase in water pressure This is incorrect
The 1st stage regulator on these is fixed, meaning it does not compensate for increases in ambient pressure. It will always be, for arguments sake 10 bar. The actual pressure of the 1st stage will be the difference between the 1st stage pressure and ambient pressure. If we were at 4 bar, then the IP coming out of the reg would be 6 bar, which of course is less than it is on the surface at 10 bar.
I'm very curious how you can disagree with this, and if you still do, I'm curious as to your explanation of how an mCCR works when one is at depth?
Thanks!
Tony