What is the perfect PO2 at depth?
Jan 16, 2022 · PO2 is the partial pressure of oxygen. What is the partial pressure of oxygen in diving? When diving, you want to keep your partial pressure of oxygen between 0.16 (16%) and 1.6 (160%) at all times. If you fall below or exceed this range, you risk serious injury or death. Even in air, suckers can exceed a partial pressure of 1.6.
What is the PO2 set-point of an O2 sensor?
Nov 10, 2021 · PO2 is the partial pressure of oxygen. What is partial pressure of oxygen in scuba diving? When scuba diving, you always want to keep your oxygen partial pressures between 0.16 (16%) and 1.6 (160%). If you fall below or go above this range you risk serious injury and death. Even on air, foolish people can exceed a partial pressure of 1.6.
How do you measure PO2 in chemistry?
Jun 08, 2009 · A ppO2 of 1.4 is generally the maximum allowed partial pressure of oxygen to ensure relative safety from the risk of CNS oxygen toxicity. Obviously, the maximum operating depth (MOD) for Air is considerably deeper than the maximum depth allowed for recreational diving. This maximum depth (40m) is recommended for several reasons.
What is the percentage of oxygen in PO2?
Aug 30, 2007 · In college physics and chemistry, the professor (s) will have explained during lecture that PO2 is expressed as a partial pressure determined by multiplying the fraction of a given gas within a mixture of gasses by the total pressure of the combined gas mix. That is what I have shown you how to do, iteratively.
How do you calculate PO2 for diving?
8:0515:56Scuba Dive with Enriched Air Nitrox (What is Maximum PO2? How to ...YouTubeStart of suggested clipEnd of suggested clipSo 4.375 minus 1 multiplied by 10 gives us 33.75 meters so using enriched air nitrox 32 our po2MoreSo 4.375 minus 1 multiplied by 10 gives us 33.75 meters so using enriched air nitrox 32 our po2 would be 1.4. At 33.75 meters with imperial similar except we are going to multiply.
What should I set my PO2 to?
While different dive computers have different default settings for both the oxygen percentage in the mix and the maximum PO2, most default settings tend to be conservative. In many cases, the default setting for the percentage of oxygen will be 21% while the default setting for PO2 is often 1.4.
What is FO2 and PO2?
FO2 is the fraction of O2 in the gas you are breathing. Air has an FO2 of 0.21. It will always be that number at any depth. PO2 is the partial pressure of Oxygen.It changes with depth.Jul 27, 2010
What is PO2 in nitrox?
PO2 is the partial pressure of oxygen. P is the absolute pressure (depth divided by 10+1) The forward slash / is divided by. FO2 x P = PO2 = Fraction of oxygen x pressure = partial pressure of oxygen = Oxygen Dose. PO2 / FO2 = P = partial pressure of oxygen / Fraction of oxygen = pressure = Depth.
What are two equipment items that do not need to be cleaned for oxygen service?
What are two equipment items that do not need to be cleaned for oxygen service? Equipment that is exposed to low pressure oxygen, such as buoyancy compensators and their low pressure inflators and dry suit inflation valves do not need to be cleaned or lubricated for oxygen service.
What is the FO2 setting Most dive computers default to?
You may discover that it has defaulted to 21 percent, you risk having the computer assume you are using a Nitrox mixture whose FO2 is different from what it actually is, and you may increase your risk of oxygen toxicity and/or decompression sickness.
How deep can you dive with 32 nitrox?
121 feetHowever, when diving on nitrox, the potential for oxygen toxicity lurks well within the depth range of recreational diving: the maximum depth on 32 percent nitrox is 121 feet; on 36 percent nitrox, it's just over 100 feet.Apr 7, 2013
How deep can you dive on air?
There are depth limitations too, as nitrogen becomes narcotic the deeper you go. This becomes increasingly debilitating, so the maximum depth for recreational diving is 130 feet (40 m). Air itself becomes toxic as we go beyond 184 feet (56 m). Best used for: All recreational diving down to 130 feet (40 m).Jan 21, 2017
What does MOD mean in diving?
maximum operating depthEnriched air nitrox contains only nitrogen and oxygen. Carlina Teteris / Getty Images. A maximum operating depth (MOD) is a depth limit based on the percentage of oxygen in a diver's breathing gas.Sep 13, 2018
Why do you dive with nitrox?
The benefit of using nitrox instead of regular gas is that it helps increase your allowed diving time as it offers less nitrogen (and more oxygen) for you to inhale, thus reducing the amount of nitrogen that will quickly dissolve into your body—thereby lengthening your no-decompression limit.Sep 7, 2018
When should I use nitrox?
Human beings clearly cannot breathe underwater—which is why you should have a scuba tank with you during your dives. These tanks usually contain regular filtered air, trimix, or nitrox. Divers typically use nitrox air in their tanks if they want to spend more time underwater.
How is EAD diving calculated?
The equivalent air depth can be calculated for depths in feet as follows: EAD = (Depth + 33) × Fraction of N2 / 0.79 − 33. Working the earlier example, for a nitrox mix containing 64% nitrogen (EAN36) being used at 90 feet, the EAD is: EAD = (90 + 33) × 0.64 / 0.79 − 33.
Rick Inman Advisor ScubaBoard Supporter
I don't know that computer, but I believe that usually the PPO2 setting is a MAXIMUM setting for setting when the warnings and sirens and flashing lights start telling you that your gonna die.
BCSGratefulDiver Mental toss flycoon ScubaBoard Supporter
If you turn off the alarms (another manual setting) it won't matter what you set it to ...
bleeb Photographer
Sorry if this has been asked before. Jus got myself the Aladin Prime and there is a manual setting for ppO2. Default setting is at 1.4 bar.
Doc Harry Solo Diver
If i understand it correctly, oxygen concentration when diving air is 21%. Based on ppO2 of 1.4 bar, that means that i would be at a max depth of 6.7ata or equivalent to about 67m?
Is 1.4 a working PO2?
1.4 would be a working PO2, but a PO2 of 1.6 is not unheard of for a resting dive, where a diver is not engaged in strenuous activity. A PO2 of 0.16 to 1.6 will sustain life. As has been mentioned, these numbers are not absolute.
Is 1.4 a universal standard?
Furthermore, 1.4 isn't a universal standard. Many tech divers will go above it for deco. The U.S. Navy is also more conservative, and uses 1.3. GUE teaches 1.2 (for cold diving).
What is the maximum PO2 for Nitrox?
Since each “flavor” of Nitrox has a different MOD, you need to make sure yours is safe at your maximum depth and which partial pressure of oxygen is right for your conditions. Many experienced Nitrox divers use a PO2 of 1.6 in warm, calm water, but back the PO2 down to 1.4 in colder more challenging conditions.
Why is Nitrox bad for diving?
However, with the good, comes the bad… often followed by the ugly. Nitrox has depth limitations because it increases the risk of oxygen toxicity, among other issues. It is a common misconception that Nitrox benefits deep divers during the dive.
