Shearwater Perdix Computer Users running Open Circuit...question?

[Pirate Dough]

I recently posted a similar question earlier. This post is geared to the setting used.
The Shearwater Perdix has 3 settings for NDL.
The Conservative options are Low, Med, High...

Who's running what...and why?
Thanks

 

[KevinNM]

I leave it in the default tech mode for now.

 

[northernone]

It gives an easy 3 levels of conservatism to choose. Standard for many dive computers. Fitness level, age or your personal conservatism preferences are some of the deciding factors.

I use to run low, moved to medium as I'm wanting a little 'cleaner' decompression profile in case I need a rapid ascent, extreme physical exertion or another emergency that would perhaps effect my offgassing. In a stressful dive I'll switch to high. Or simply add my own extended safety stop.

Regards,
Cameron

 

[RainPilot]

I run medium on most shallow dives, if I'm doing something deeper I'll run it on tech mode on 50/70 which is a bit more conservative than "High"

 

[SecT]

I run mine on medium , due to the simple fact that was the setting started. Not been doing any deep dives or specially long ones either yet. To cold in water still.

 

[rongoodman]

I've left mine at Medium. Watching the tissue compartment graph on multiple dive days, it looks like all the compartments are clearing adequately.

 

[kafkaland]

30/70 for deeper coldwater dives (Great Lakes), 35/85 for shallower warm water (Mexico). If I left it at 30/70 in Cozumel, I'd drive the rest of the boat crazy with my deco obligations on many dives. Still more conservative than DSAT on my backup computer.

 

[Neilwood]

Not too many dives on it yet but I did leave it on recreational Medium and paid attention to how I felt when I got out (no unusual feelings/tiredness etc that might suggest any deco issues).

 

[JMBL]

While diving trimix : 30/70 or 35/85 depending on the dive. When in Rec Mode : Medium for dives with reduced deco time, Low when diving no deco.

Why those settings ? On trimix : that's the closest to the deco plan used by my buddies who don't have a trimix computer (just what I did in fact until a couple of years ago or so). On Rec Mode, just paid attention to the way I felt after diving with the different settings and choose the one which offered me the best ration between deco and bottom time.

 

[Skulmoski]

I switched to low conservatism after using it on about 50 dives. My NDL clock was quicker than my colleagues. A couple of times I was given a 6 minute safety stop at 6 meters while my dive group completed only 3 minutes. I monitor my tissue compartments graph during and after the dive. I also take a bit longer surface interval where possible.

Could it be that the Medium setting is the factory default setting chosen by subject matter experts and lawyers?

GJS