Negative test.

Nick uk. · 22nd March 2006, 08:53

Ok, iv'e woken this morning after 3 1/2 hours sleep........ and the jury's still out over the ADV

***Decodiver*** · 22nd March 2006, 10:05

All of the YBODs and the Evolution I have owned have gone 24 hours plus on a neg.
My Boris does about 2 minutes before the hose starts to lengthen and my Meg will do 24 hours no probs.

Cheers,

Dave Cooper.

CharlieT · 22nd March 2006, 12:19

I've done an overnight neg test on my Vision but usually do about 30 mins for both pos and neg tests.

As a comparatively new Inspiration Vision user, I'm happy using my ADV.

Charlie
www.aquanautdiveclub.co.uk

**moley** · 22nd March 2006, 12:57

As with Dave Cooper....my Meg will happily hold neg untill I feel I have to let it go. (24 hours +) (Ooooops...I wont make a habit out of it).

My rough rule of thumb is that I will suck it down to negative, then I will see how long I can hold my shirtails up my arse, then I will let it go!

The Meg is tighter than my dive-buddies wallet....and thats watertight!!!!

Ian

geordiediver · 22nd March 2006, 17:58

I have had my classic for about 50 dives since new - the longest neg test it has held is about 5 mins, with the average about 3. If it holds for 2 to 3 mins, I am happy to dive with it.

I think the reason for the short time its holds the test is that the inside surfaces on the "T" pieces are slightly rough. I have been lazy in not sanding them down

Geordiediver

Mark Chase · 22nd March 2006, 18:09

Quote: (Originally Posted by decoweenie)

You dive a YBOD and you don't know ?

No i don't, I was told by my instructor that it should hold neg for as long as i want it to but 15 -20mins was fine. My unit often held neg over night and all the way to the dive site in the boot of the car. Then I bought a KISS mouthpiece and I watch the DVD and there is Gorden saying don't do this as it buggers the ADV diaphragm? So is the ADV on a KISS significantly different to that of a YBOD or what? Was Gordon's opinion not universally held?

By the by, I have a thick skin and I care much less about what people think of me and much more about gaining knowledge about my diving so I don't mind asking daft questions.

No offense but answers like the one above can put people off asking questions because they are afraid of looking daft. I think the "didn't they teach you this on the course" type answer should be avoided if the more respected members of the forum wish to help others.

ATB

Mark Chase

**moley** · 22nd March 2006, 18:59

Quote: (Originally Posted by Mark Chase)

No i don't, I was told by my instructor that it should hold neg for as long as i want it to but 15 -20mins was fine. My unit often held neg over night and all the way to the dive site in the boot of the car. Then I bought a KISS mouthpiece and I watch the DVD and there is Gorden saying don't do this as it buggers the ADV diaphragm? So is the ADV on a KISS significantly different to that of a YBOD or what? Was Gordon's opinion not universally held?

By the by, I have a thick skin and I care much less about what people think of me and much more about gaining knowledge about my diving so I don't mind asking daft questions.

No offense but answers like the one above can put people off asking questions because they are afraid of looking daft. I think the "didn't they teach you this on the course" type answer should be avoided if the more respected members of the forum wish to help others.

ATB

Mark Chase

Well said Mark.

22nd March 2006, 08:53	#21 (permalink)
Nick uk. Made in England. Current Rebreather/s: Inspiration Classic Azimuth Other Rebreather/s: Azimuth Join Date: Nov 2005 Location: Viale C.Colombo 75 Marina di Carrara. MS 54036 Italy Posts: 575	Re: Negative test. Ok, iv'e woken this morning after 3 1/2 hours sleep........ and the jury's still out over the ADV __________________ If it aint broke....don't fix it, and if it is.............well......get another one! divechief2000@hotmail.com
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22nd March 2006, 10:05	#22 (permalink)
*Decodiver* Administrator Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Jan 2005 Location: Geneva Posts: 2,190	Re: Negative test. All of the YBODs and the Evolution I have owned have gone 24 hours plus on a neg. My Boris does about 2 minutes before the hose starts to lengthen and my Meg will do 24 hours no probs. 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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22nd March 2006, 12:19	#23 (permalink)
CharlieT Custom Title Allowed! Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Nov 2005 Location: London Posts: 449	Re: Negative test. I've done an overnight neg test on my Vision but usually do about 30 mins for both pos and neg tests. As a comparatively new Inspiration Vision user, I'm happy using my ADV. Charlie www.aquanautdiveclub.co.uk
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22nd March 2006, 12:57	#24 (permalink)
moley Supporting Member Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Megalodon Sport Kiss Join Date: Nov 2005 Location: wiltshire, Uk Posts: 155	Re: Negative test. As with Dave Cooper....my Meg will happily hold neg untill I feel I have to let it go. (24 hours +) (Ooooops...I wont make a habit out of it). My rough rule of thumb is that I will suck it down to negative, then I will see how long I can hold my shirtails up my arse, then I will let it go! The Meg is tighter than my dive-buddies wallet....and thats watertight!!!! Ian __________________ *You think I know nothing.....and I do!!!*
(Online)

22nd March 2006, 17:58	#25 (permalink)
geordiediver New Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Jul 2005 Location: England Posts: 12	Re: Negative test. I have had my classic for about 50 dives since new - the longest neg test it has held is about 5 mins, with the average about 3. If it holds for 2 to 3 mins, I am happy to dive with it. I think the reason for the short time its holds the test is that the inside surfaces on the "T" pieces are slightly rough. I have been lazy in not sanding them down Geordiediver
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22nd March 2006, 18:09	#26 (permalink)
Mark Chase RBW Member Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Jan 2005 Location: Kent Posts: 2,821	Re: Negative test. Quote: (Originally Posted by decoweenie) You dive a YBOD and you don't know ? No i don't, I was told by my instructor that it should hold neg for as long as i want it to but 15 -20mins was fine. My unit often held neg over night and all the way to the dive site in the boot of the car. Then I bought a KISS mouthpiece and I watch the DVD and there is Gorden saying don't do this as it buggers the ADV diaphragm? So is the ADV on a KISS significantly different to that of a YBOD or what? Was Gordon's opinion not universally held? By the by, I have a thick skin and I care much less about what people think of me and much more about gaining knowledge about my diving so I don't mind asking daft questions. No offense but answers like the one above can put people off asking questions because they are afraid of looking daft. I think the "didn't they teach you this on the course" type answer should be avoided if the more respected members of the forum wish to help others. ATB Mark Chase __________________ See my "Doing It Chasey" video where I'm locked into a padded room, naked, with two ball bearings and within an Hour, I manage to lose one and break the other!!! Kevin Juergensen 16/11/08 [/quote]
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22nd March 2006, 18:59	#27 (permalink)
moley Supporting Member Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Megalodon Sport Kiss Join Date: Nov 2005 Location: wiltshire, Uk Posts: 155	Re: Negative test. Quote: (Originally Posted by Mark Chase) No i don't, I was told by my instructor that it should hold neg for as long as i want it to but 15 -20mins was fine. My unit often held neg over night and all the way to the dive site in the boot of the car. Then I bought a KISS mouthpiece and I watch the DVD and there is Gorden saying don't do this as it buggers the ADV diaphragm? So is the ADV on a KISS significantly different to that of a YBOD or what? Was Gordon's opinion not universally held? By the by, I have a thick skin and I care much less about what people think of me and much more about gaining knowledge about my diving so I don't mind asking daft questions. No offense but answers like the one above can put people off asking questions because they are afraid of looking daft. I think the "didn't they teach you this on the course" type answer should be avoided if the more respected members of the forum wish to help others. ATB Mark Chase Well said Mark. __________________ *You think I know nothing.....and I do!!!*
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