How often do you check you PO2?

Jason Blackwell · 9th June 2006, 03:22

I’m just doing a little research, and after reading a few of the current posts in some other threads, I have set up TWO Polls.

This one is:

How often do you check your PO2 on your HANDPIECE / Gauge while diving your CCR?

The second poll is:

IF you use your HUD for your Primary source of PO2 information, how often do you then check your secondary/other hand piece? Please see separate thread.

HUD:I use my HUD as my PRIMARY source of PO2 information ……..and I will vote in the other Poll too!!!
NEVER: that is what Bells, whistles, vibrators, lights etc are for
When I think about it
Every 4 -5 minutes
Every 3-4 minutes
Every 2-3 minutes
Every Minute
Continuously….I am really scared by this thing
I do not have a redundant display i.e. KISS style
Other……please tell us about it

Mark Chase · 9th June 2006, 07:25

On my old unit: Having finished all the checks on the way down, I dive the HUD. I revert to diving the handsets on the way up. If the HUD flickers or flashes at anypoint during the dive i check the hand sets. This probably hapes four or five times during a dive.

ATB

Mark Chase

***EBT*** · 9th June 2006, 08:18

If Im at constant depth, I'll check when I feel like it (around 5-7 mins) as long as I've noticed no change in bouyancy/loop volume/injection sound/workload.

If Im varying depth, checks will become more frequent.

Padowan · 9th June 2006, 09:34

I tend to be pretty aware of my unit, listening to the solenoid regularly (not constantly) and feeling the loop volume. At constant depth, I probably don't check any more frequently than once every 5 mins or so, as I run min loop vol too. I check much more frequently at the start of the dive, during the descent, and for the fisrt few minutes on the bottom as well as very regularly during the ascent and deco. On an average dive with a 30-45minute bottom time I reckon I look at the handsets about half a dozen times during the bottom phase. I also tend to take a look immediately before I do anything significant that's likely to take away some of my focus - like starting to lay line or bit of spidge liberation.

***Decodiver*** · 9th June 2006, 10:18

Every minute, for me it is a reflex, I also check it automatically whenever I pass what I call a diving waypoint.

ie

Stand up, check PPO2,

Jump in, check PPO2,

and so on and so forth.

It detracts in no way from my dive at all, and when I say I check every minute this means I look at my handset(s) every minute, just the primary, after all I have a HUD also, whether I am diving the Meg or the Boris.

I have a duty to my beautiful wife and my beautiful daughter to do so!!

Cheers,

Dave Cooper.

rewrites · 9th June 2006, 10:58

When I first started, I found myself checking at all the major 'waypoints' as Dave puts it - which is fundamental. However, on the bottom, I lapsed into possibly every 5 mins -sometimes longer as the dive progressed. What I have done over the last couple of months is to check the handset almost everytime the unit makes a change (loop volume, solenoid inject). This isn't a pattern I intend to keep to as it is obtrusive to the dive. However, as a novice Rebreather diver, I have found this approach has taught me a lot about how the unit works - and I find I am beginning to have the same relationship with my RB as I have with my car (after 20 years of driving); namely, I am aware of what the unit is doing, and am now approaching the point where i am expecting the unit to do something (such as solenoid inject) and am aware if what I am expecting is delayed - or hasn't happened.

After another 20-30 hours, I intend to drop these checks to about every 2 minutes possibly.

PH

**JPJones** · 9th June 2006, 11:26

I use the Hud in the PPO2 mode and check my primary handset when I feel the need to check my dive computer and when I do I use it to cross check the Hud. If it wasn't for the Hud I don't think I would be that sold on CCR I dive for the fun of diving and having to check my wrist every couple of minutes is a pain but without the Hud that is what I would do.

Warren_L · 9th June 2006, 14:06

I generally try to check every 2-3 minutes, and as well, since I take a lot of photos, I have a quick look at the HUD before setting up a shot, take my shot, then a look at the handset.

***ScubaDadMiami*** · 9th June 2006, 14:44

Quote: (Originally Posted by Decodiver)

. . . I also check it automatically whenever I pass what I call a diving waypoint.

Great way to coin the term. That's a keeper.

***Decodiver*** · 9th June 2006, 17:18

Oh and just to illustrate a point, this is one of the reasons I check my handsets every minute.........

View Poll Results: How often do you check your PO2 on your HANDPIECE / Gauge while diving your CCR?
HUD:I use my HUD as my PRIMARY source of PO2 information & I will vote in the other Poll too!	33	28.95%
NEVER: that is what Bells/whistles/vibrators/lights are for	0	0%
When I think about it	3	2.63%
Every 4 -5 minutes	15	13.16%
Every 3-4 minutes	16	14.04%
Every 2-3 minutes	38	33.33%
Every Minute	8	7.02%
Continuously….I am really scared by this thing	5	4.39%
I do not have a redundant display i.e. KISS style	4	3.51%
Other……please tell us about it	4	3.51%
Multiple Choice Poll. Voters: 114. You may not vote on this poll

9th June 2006, 03:22	#1 (permalink)
Jason Blackwell Bloody Rebreathers! Current Rebreather/s: Inspiration Classic Sport Kiss Optima Dolphin Ray Other Rebreather/s: Not Bought Yet Inspiration Vision Evolution Classic Kiss Dolphin Ray Join Date: Feb 2005 Location: Brisbane, Queensland, AUSTRALIA Posts: 361	How often do you check your PO2? I’m just doing a little research, and after reading a few of the current posts in some other threads, I have set up TWO Polls. This one is: How often do you check your PO2 on your HANDPIECE / Gauge while diving your CCR? The second poll is: IF you use your HUD for your Primary source of PO2 information, how often do you then check your secondary/other hand piece? Please see separate thread. HUD:I use my HUD as my PRIMARY source of PO2 information ……..and I will vote in the other Poll too!!! NEVER: that is what Bells, whistles, vibrators, lights etc are for When I think about it Every 4 -5 minutes Every 3-4 minutes Every 2-3 minutes Every Minute Continuously….I am really scared by this thing I do not have a redundant display i.e. KISS style Other……please tell us about it __________________ Jason Blackwell TDI Instructor Trainer #1358 Optima...Inspiration/Evolution...KISS...and what is next??? www.divedivedive.com.au OZTeK '09 March 2009 Sydney, Australia www.diveoztek.com.au Last edited by Jason Blackwell : 9th June 2006 at 20:48.
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9th June 2006, 07:25	#2 (permalink)
Mark Chase I go down for ages Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Jan 2005 Location: Kent Posts: 2,461	Re: How often do you check you PO2? On my old unit: Having finished all the checks on the way down, I dive the HUD. I revert to diving the handsets on the way up. If the HUD flickers or flashes at anypoint during the dive i check the hand sets. This probably hapes four or five times during a dive. ATB Mark Chase __________________ Is it supposed to make that noise ? I took my unit to the dive shop and demanded they bolt on every thing that would fit. Join my elite diving teem and get a Tshirt "Doing It Chasey"Hammerhead Eccr Advanced Diving System
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9th June 2006, 08:18	#3 (permalink)
*EBT* Apprentice Luddite Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: UK, Brighton Posts: 1,853	Re: How often do you check you PO2? If Im at constant depth, I'll check when I feel like it (around 5-7 mins) as long as I've noticed no change in bouyancy/loop volume/injection sound/workload. If Im varying depth, checks will become more frequent. __________________ Eagles May Soar, but weasels don't get sucked into jet engines! Rebreather World Terms of service Real diving t-shirts for real divers
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9th June 2006, 09:34	#4 (permalink)
Padowan Proper Boffin Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Feb 2005 Location: Kent, UK. Posts: 507	Re: How often do you check you PO2? I tend to be pretty aware of my unit, listening to the solenoid regularly (not constantly) and feeling the loop volume. At constant depth, I probably don't check any more frequently than once every 5 mins or so, as I run min loop vol too. I check much more frequently at the start of the dive, during the descent, and for the fisrt few minutes on the bottom as well as very regularly during the ascent and deco. On an average dive with a 30-45minute bottom time I reckon I look at the handsets about half a dozen times during the bottom phase. I also tend to take a look immediately before I do anything significant that's likely to take away some of my focus - like starting to lay line or bit of spidge liberation. __________________ Padowan The future's bright, the future's Yellow .....for now padowan.net - Latest Video: Scapa Flow Rebreather Diving
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9th June 2006, 10:18	#5 (permalink)
*Decodiver* Administrator Current Rebreather/s: Megalodon Ouroboros rEvo Other CCR Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Sport Kiss Classic Kiss rEvo Other CCR Join Date: Jan 2005 Location: Geneva Posts: 2,165	Re: How often do you check you PO2? Every minute, for me it is a reflex, I also check it automatically whenever I pass what I call a diving waypoint. ie Stand up, check PPO2, Jump in, check PPO2, and so on and so forth. It detracts in no way from my dive at all, and when I say I check every minute this means I look at my handset(s) every minute, just the primary, after all I have a HUD also, whether I am diving the Meg or the Boris. I have a duty to my beautiful wife and my beautiful daughter to do so!! Cheers, Dave Cooper. __________________ CCR/OC Trimix Instructor Trainer CCR Training to Mixed Gas in Switzerland, France, UK & Germany on Megalodon/COPIS-Megalodon/KISS/Sport KISS/Ouroboros/rEvo/Inspiration/Evolution/Sentinel www.zerogravitydiving.com Rebreather World Terms & Conditions
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9th June 2006, 10:58	#6 (permalink)
rewrites New Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Join Date: Sep 2005 Location: Cornwall, UK Posts: 59	Re: How often do you check you PO2? When I first started, I found myself checking at all the major 'waypoints' as Dave puts it - which is fundamental. However, on the bottom, I lapsed into possibly every 5 mins -sometimes longer as the dive progressed. What I have done over the last couple of months is to check the handset almost everytime the unit makes a change (loop volume, solenoid inject). This isn't a pattern I intend to keep to as it is obtrusive to the dive. However, as a novice Rebreather diver, I have found this approach has taught me a lot about how the unit works - and I find I am beginning to have the same relationship with my RB as I have with my car (after 20 years of driving); namely, I am aware of what the unit is doing, and am now approaching the point where i am expecting the unit to do something (such as solenoid inject) and am aware if what I am expecting is delayed - or hasn't happened. After another 20-30 hours, I intend to drop these checks to about every 2 minutes possibly. PH __________________ Always running with scissors ~8~
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9th June 2006, 11:26	#7 (permalink)
JPJones O2ptima Test Dummy Current Rebreather/s: Inspiration Classic Megalodon Sport Kiss Classic Kiss Optima Titan Other Rebreather/s: Join Date: Sep 2005 Location: Florida Posts: 367	Re: How often do you check you PO2? I use the Hud in the PPO2 mode and check my primary handset when I feel the need to check my dive computer and when I do I use it to cross check the Hud. If it wasn't for the Hud I don't think I would be that sold on CCR I dive for the fun of diving and having to check my wrist every couple of minutes is a pain but without the Hud that is what I would do. __________________ NSS/CDS Training Chairman www.jpjscuba.com
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9th June 2006, 14:06	#8 (permalink)
Warren_L CCR Photographer Current Rebreather/s: Evolution Other Rebreather/s: Join Date: May 2005 Location: Toronto, Ontario, Canada Posts: 62	Re: How often do you check you PO2? I generally try to check every 2-3 minutes, and as well, since I take a lot of photos, I have a quick look at the HUD before setting up a shot, take my shot, then a look at the handset. __________________ http://www.warrenlophotography.com
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9th June 2006, 14:44	#9 (permalink)
*ScubaDadMiami* Moderator Current Rebreather/s: Optima Other Rebreather/s: Join Date: Sep 2005 Location: Florida, USA Posts: 1,927	Re: How often do you check you PO2? Quote: (Originally Posted by Decodiver) . . . I also check it automatically whenever I pass what I call a diving waypoint. Great way to coin the term. That's a keeper. __________________ Howard Packer IANTD CCR Instructor Miami Beach, Florida CCRDiveTraining.com
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