3 Cell Back Up On Inspiration

Humuhumu · 6th July 2008, 17:00

Quote: (Originally Posted by PCDiver)

I'm using a VR3 as backup connected to one cell. The reading is accurate but a tad slow. The Vision updates faster. Would it be a problem? I don't think so. But I would never dive a rebreather based on a VR3 connected to one cell.

The other problem is the deco algorithm. The VR3 uses Buhlmann combined with deep stop. The Vision uses Gradient Factors. Both are rather incompatible. The VR3 is more conservative and starts with deeper stops.

There is no incompatibility betwenn a VR3 and a VISION, both use Bühlmann, the only thing is that the GF parameters are not the same on both computers, but you can change that (I use mostly 30/85). Furthermore, the GF functionality is only available with Trimix on the VISION, with NITROX you can only choose a conservatism factor between 1 and 5 (3 from factory). Everything is clearly explained in the VISION manual.

Cheers

Humuhumu

divetheworld · 6th July 2008, 21:32

Quote: (Originally Posted by Humuhumu)

There is no incompatibility betwenn a VR3 and a VISION, both use Bühlmann, the only thing is that the GF parameters are not the same on both computers, but you can change that (I use mostly 30/85). Furthermore, the GF functionality is only available with Trimix on the VISION, with NITROX you can only choose a conservatism factor between 1 and 5 (3 from factory). Everything is clearly explained in the VISION manual.

Cheers

Humuhumu

What you will find is that the Pursuit is much more flexible. Your deep stops follow an actual decompression profile calculated from compartments which VR3 owners might find novel. Your diving style may change and you may want to change your Vision gradient factor. It is easy to match a Pursuit number for number. Our last dive with this system was a bottom time on the wreck at 55m of 68 mins. After a long ascent, when the vision and pursuit finally cleared, they were within a minute or so of each other. Both were set to 15/85. Thats confidence making, and so is having all three cells on your independant secondary.
I hope you find what your looking for.

Brent

6th July 2008, 17:00	#11 (permalink)
Humuhumu Yellow Box Of Delight Current Rebreather/s: Inspiration Vision Other Rebreather/s: Not Bought Yet Join Date: Jan 2007 Location: Blue Planet Posts: 147	Re: 3 Cell Back Up On Inspiration Quote: (Originally Posted by PCDiver) I'm using a VR3 as backup connected to one cell. The reading is accurate but a tad slow. The Vision updates faster. Would it be a problem? I don't think so. But I would never dive a rebreather based on a VR3 connected to one cell. The other problem is the deco algorithm. The VR3 uses Buhlmann combined with deep stop. The Vision uses Gradient Factors. Both are rather incompatible. The VR3 is more conservative and starts with deeper stops. There is no incompatibility betwenn a VR3 and a VISION, both use Bühlmann, the only thing is that the GF parameters are not the same on both computers, but you can change that (I use mostly 30/85). Furthermore, the GF functionality is only available with Trimix on the VISION, with NITROX you can only choose a conservatism factor between 1 and 5 (3 from factory). Everything is clearly explained in the VISION manual. Cheers Humuhumu __________________ Humuhumu Nukunuku Apua'a
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6th July 2008, 21:32	#12 (permalink)
divetheworld Dive porn pimp Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Inspiration Vision Classic Kiss Other CCR Join Date: Mar 2005 Location: Leeds, England Posts: 1,638	Re: 3 Cell Back Up On Inspiration Quote: (Originally Posted by Humuhumu) There is no incompatibility betwenn a VR3 and a VISION, both use Bühlmann, the only thing is that the GF parameters are not the same on both computers, but you can change that (I use mostly 30/85). Furthermore, the GF functionality is only available with Trimix on the VISION, with NITROX you can only choose a conservatism factor between 1 and 5 (3 from factory). Everything is clearly explained in the VISION manual. Cheers Humuhumu What you will find is that the Pursuit is much more flexible. Your deep stops follow an actual decompression profile calculated from compartments which VR3 owners might find novel. Your diving style may change and you may want to change your Vision gradient factor. It is easy to match a Pursuit number for number. Our last dive with this system was a bottom time on the wreck at 55m of 68 mins. After a long ascent, when the vision and pursuit finally cleared, they were within a minute or so of each other. Both were set to 15/85. Thats confidence making, and so is having all three cells on your independant secondary. I hope you find what your looking for. Brent __________________ Attitude and self praise is no reccomendation. Dont try to be a great man, just be a man and let history be the judge of you. *WWW.NARKEDAT90.CO.UK* *http://www.grpservices.com/pursuit/* Supporting Shearwater Research Products in Europe
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