Conservatism level of Cochran EMC-16

RebreatherNut · 27th January 2008, 21:13

Guys and gals,

Just to be clear, I don't want to start the argument of Cochran vs. VR3!

But I was wondering, because all my friends dive a VR3 and I dive with a Cochran EMC-16, at what level do you set the Conservatism of the EMC-16 in order to get somewhat close to the VR3? I am aware that those 2 computers are diffrent, but I was just curious if any of you out there have any experience?

Thanks,

RBN

grandizer52 · 27th January 2008, 22:17

Is there a reason you even want to change the consevancy? why not leave it at 0 and maximize bottom time.

**Dsix36** · 27th January 2008, 22:50

I don't have any experience with the EMC-16.

I have used Commander, Commander+, Nitrox (2gas,2fo2), and Lifeguard versions of Cochran computers and have always left the conservatisim set at 0. No issues of any kind.

I know, a bit off track of this thread

RebreatherNut · 28th January 2008, 00:24

Quote: (Originally Posted by grandizer52)

Is there a reason you even want to change the consevancy? why not leave it at 0 and maximize bottom time.

Yo Steve,
Yes, there is actually a reason. I will be diving in a very remote location, next chamber is 2 days travel away! So, I figure under those circumstances a little conservancy is not a bad thing. Would hate to have to cut the trip short because of a mishap.

But when I dive around here, I leave it at "0".

cheers,
RBN

grandizer52 · 28th January 2008, 02:36

Hea bro...welcome home...how was the trip? might be out your way for couple of weeks in march,
i wouldn't set it more that 5% on the conservatism. If you read the article on bikini atoll it tells about setting to to conservitive, the guy didn't know he set it so, and got screwed out of some dives. On the cochran site it has a good explanation on this. I tried with both a commander and the gemini, and actually got it to go into deco on a 45FT dive...on air
laytah
steve

JS1scuba · 28th January 2008, 03:05

Quote: (Originally Posted by RebreatherNut)

Guys and gals,

Just to be clear, I don't want to start the argument of Cochran vs. VR3!

But I was wondering, because all my friends dive a VR3 and I dive with a Cochran EMC-16, at what level do you set the Conservatism of the EMC-16 in order to get somewhat close to the VR3? I am aware that those 2 computers are diffrent, but I was just curious if any of you out there have any experience?

Thanks,

RBN

The EMC16 is a bit different than the EMC20 (16 compartments compared to 20) Your EMC16 is a nitrogen based unit, not helium.

To get it to fly with a shallow cieling and longer shallow times like the Buhlman based VR3 run it on a Con 10.

I routinely run all my cochran units on Con 5 let it clear and then add 10 minutes on the shallow end. What you might want to do is start on 5 and track along with your friends -- note when the Cochran clears compared to them. Then just hang out with them a while. If you want to dial it up then do so on the next dive.

Another thing to note is that when running on Set Point mode you dont need to hang out on stops longer than indicated. Just move on up to the next cieling. I will usually stay a few feet deeper than the cieliing so as to not violate it.

Also .. if you do violate a stop for any reason and cant go back down to the stop the Cochran will NOT lock out but will recaclulate deco based on where you are. It's a neat catch up feature.

If you have other questions on it just ask.

Cheers

**fireman** · 28th January 2008, 14:46

Why not set it at its least conservative, and have a pad plan based on its algorithem. IE If you think you need more deep add them, or just add some time at 20/10 feet for good luck.....

RebreatherNut · 28th January 2008, 23:41

Thanks guys for all your input!
Much appreciated

RBN

27th January 2008, 21:13	#1 (permalink)
RebreatherNut Rebreather World Greeter Current Rebreather/s: Sport Kiss Ray Other Rebreather/s: Ray Join Date: Apr 2005 Location: Pacific Northwest Posts: 698	Conservatism level of Cochran EMC-16 Guys and gals, Just to be clear, I don't want to start the argument of Cochran vs. VR3! But I was wondering, because all my friends dive a VR3 and I dive with a Cochran EMC-16, at what level do you set the Conservatism of the EMC-16 in order to get somewhat close to the VR3? I am aware that those 2 computers are diffrent, but I was just curious if any of you out there have any experience? Thanks, RBN __________________ "One minute to go, Luck-meister! Then I'll be down on you like a buzzard on a gut wagon." - ALF
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27th January 2008, 22:17	#2 (permalink)
grandizer52 Sport Kiss & Shearwater Current Rebreather/s: Sport Kiss Other CCR Home Build Other Rebreather/s: Not Bought Yet Sport Kiss Classic Kiss MK 15.X Other CCR Home Build Join Date: May 2006 Location: pearl city hawaii EARTH moving to Iscandar Posts: 254	Re: Conservatism level of Cochran EMC-16 Is there a reason you even want to change the consevancy? why not leave it at 0 and maximize bottom time.
(Online)

27th January 2008, 22:50	#3 (permalink)
Dsix36 Going Down? Current Rebreather/s: Optima Other Rebreather/s: Join Date: Aug 2007 Location: Deerfield Beach, Florida Posts: 1,052	Re: Conservatism level of Cochran EMC-16 I don't have any experience with the EMC-16. I have used Commander, Commander+, Nitrox (2gas,2fo2), and Lifeguard versions of Cochran computers and have always left the conservatisim set at 0. No issues of any kind. I know, a bit off track of this thread __________________ THE MORE THAT I LEARN, THE MORE THAT I STILL NEED TO LEARN!!!!!!
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28th January 2008, 00:24	#4 (permalink)
RebreatherNut Rebreather World Greeter Current Rebreather/s: Sport Kiss Ray Other Rebreather/s: Ray Join Date: Apr 2005 Location: Pacific Northwest Posts: 698	Re: Conservatism level of Cochran EMC-16 Quote: (Originally Posted by grandizer52) Is there a reason you even want to change the consevancy? why not leave it at 0 and maximize bottom time. Yo Steve, Yes, there is actually a reason. I will be diving in a very remote location, next chamber is 2 days travel away! So, I figure under those circumstances a little conservancy is not a bad thing. Would hate to have to cut the trip short because of a mishap. But when I dive around here, I leave it at "0". cheers, RBN __________________ "One minute to go, Luck-meister! Then I'll be down on you like a buzzard on a gut wagon." - ALF
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28th January 2008, 02:36	#5 (permalink)
grandizer52 Sport Kiss & Shearwater Current Rebreather/s: Sport Kiss Other CCR Home Build Other Rebreather/s: Not Bought Yet Sport Kiss Classic Kiss MK 15.X Other CCR Home Build Join Date: May 2006 Location: pearl city hawaii EARTH moving to Iscandar Posts: 254	Re: Conservatism level of Cochran EMC-16 Hea bro...welcome home...how was the trip? might be out your way for couple of weeks in march, i wouldn't set it more that 5% on the conservatism. If you read the article on bikini atoll it tells about setting to to conservitive, the guy didn't know he set it so, and got screwed out of some dives. On the cochran site it has a good explanation on this. I tried with both a commander and the gemini, and actually got it to go into deco on a 45FT dive...on air laytah steve
(Online)

28th January 2008, 03:05	#6 (permalink)
JS1scuba RebreatherWorld Sponsor Current Rebreather/s: Sport Kiss Classic Kiss Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Sport Kiss Classic Kiss MK 15.X Join Date: Oct 2005 Location: Lake Havasu City, AZ - USA Posts: 494	Re: Conservatism level of Cochran EMC-16 Quote: (Originally Posted by RebreatherNut) Guys and gals, Just to be clear, I don't want to start the argument of Cochran vs. VR3! But I was wondering, because all my friends dive a VR3 and I dive with a Cochran EMC-16, at what level do you set the Conservatism of the EMC-16 in order to get somewhat close to the VR3? I am aware that those 2 computers are diffrent, but I was just curious if any of you out there have any experience? Thanks, RBN The EMC16 is a bit different than the EMC20 (16 compartments compared to 20) Your EMC16 is a nitrogen based unit, not helium. To get it to fly with a shallow cieling and longer shallow times like the Buhlman based VR3 run it on a Con 10. I routinely run all my cochran units on Con 5 let it clear and then add 10 minutes on the shallow end. What you might want to do is start on 5 and track along with your friends -- note when the Cochran clears compared to them. Then just hang out with them a while. If you want to dial it up then do so on the next dive. Another thing to note is that when running on Set Point mode you dont need to hang out on stops longer than indicated. Just move on up to the next cieling. I will usually stay a few feet deeper than the cieliing so as to not violate it. Also .. if you do violate a stop for any reason and cant go back down to the stop the Cochran will NOT lock out but will recaclulate deco based on where you are. It's a neat catch up feature. If you have other questions on it just ask. Cheers __________________ Joel Silverstein, VP COO Tech Diving Limited a Division of Scuba Training and Technology Inc. http://www.nautilusdiveplanner.com http://www.nobubblediving.com
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28th January 2008, 14:46	#7 (permalink)
fireman rEvo combat swimmer Current Rebreather/s: rEvo Other CCR Other Rebreather/s: rEvo Other CCR Join Date: Nov 2006 Location: chicago Posts: 525	Re: Conservatism level of Cochran EMC-16 Why not set it at its least conservative, and have a pad plan based on its algorithem. IE If you think you need more deep add them, or just add some time at 20/10 feet for good luck..... __________________ Heres to you Capt. Bill Never Forget, and stay safe everyone.
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28th January 2008, 23:41	#8 (permalink)
RebreatherNut Rebreather World Greeter Current Rebreather/s: Sport Kiss Ray Other Rebreather/s: Ray Join Date: Apr 2005 Location: Pacific Northwest Posts: 698	Re: Conservatism level of Cochran EMC-16 Thanks guys for all your input! Much appreciated RBN __________________ "One minute to go, Luck-meister! Then I'll be down on you like a buzzard on a gut wagon." - ALF
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