Evolution

Michel2711 · 3rd April 2007, 13:27

I bought it from Silent Diving Systems in April 2006, did approx. 40 dives with it. There was a problem with the electronic (a faulty diode, according to SDS) and AP Diving replaced the entire lid 3 months ago. The cells are also new and it can be returned to SDS next year for a free inspection / change of cells. I did only one dive since it was returned to me. There was one occurrence of the O2 valve remaining opened after calibration and although it did not happen again, I would recommend that the unit be inspected by a qualified technician before use.

medium lung
medium harness
temp stick
Auto Diluent and flow stop
nitrox software
yellow
in very good condition (just a couple of scratches on the yellow cover and my name / phone # on the back of the cover).
It also comes with a bracket for an additional diluent tank (value $200)
right now in Cozumel, the unit will be in New York City in a week or so.

I would like to sell it for usd 7000 + shipping.I can send pics upon request. Write at : michel@underwaterscapes.com

johnpsg@mac.com · 5th April 2007, 07:56

Michel,

I sent you an email direct, I'm certainly interested in buying.

Wondering about your solenoid staying open. Was this the original problem? Diagnosed as a mechanical or software failure? Strange that it happened once more with a new lid and assuming APD replaced whatever hardware contained the faulty diode. Not something you'd want in the middle of a dive, for sure. If it was a software problem, it might only be a possibility as part of the calibration process. If hardware, could happen again any time, but in that case how come the replacement lid didn't cure it?

Curious...

John.

Michel2711 · 5th April 2007, 14:08

Hi John, thanks for the interest. The solenoid thing is independent from the reason why the lid was changed. The replacement for a new lid (back in January 07) was due to a defective diode which prevented the unit to start at all. The solenoid happened to me with the new lid after a successful calibration: I noticed that the lungs were overinflated and then realized that the O2 was still flowing (which the engine noise on the boat I could not hear it first). I don't think it's a software glitch (I have the most recent version), but more a mechanical problem with the valve that might have to be replaced. I sent a note to SDS (US dealer) about it and I'm waiting for an answer. After opening the lid and un-tightening / tightening the little know on the valve, it worked OK and I was able to dive without problem (on a shallow dive though where the risk of the valve getting stuck open would be minimal).

Regards,
Michel

**Gill Envy** · 5th April 2007, 16:55

Quote: (Originally Posted by Michel2711)

Hi John, thanks for the interest. The solenoid thing is independent from the reason why the lid was changed. The replacement for a new lid (back in January 07) was due to a defective diode which prevented the unit to start at all. The solenoid happened to me with the new lid after a successful calibration: I noticed that the lungs were overinflated and then realized that the O2 was still flowing (which the engine noise on the boat I could not hear it first). I don't think it's a software glitch (I have the most recent version), but more a mechanical problem with the valve that might have to be replaced. I sent a note to SDS (US dealer) about it and I'm waiting for an answer. After opening the lid and un-tightening / tightening the little know on the valve, it worked OK and I was able to dive without problem (on a shallow dive though where the risk of the valve getting stuck open would be minimal).

Regards,
Michel

Michel, this sounds very much like a leaky ADV. We've had this issue before and resolved it ourselves. replacing the "o"rings in the banjo fitting on the ADV stopped leaks into the inhale counter lung. the leak was effectively causing a flush of the loop leading the o2 level to drop at the sensors causing the solenoid to fire and the lungs to overfill, it gave me the "heebee jeebees" till I figured it out. just a thought. Removing the loop from either end of the ADV can make it eisier to hear. submerging the adv while pressurized can reveal weather the leak is comming from the regulator part of the ADV or the other end, which is the banjo fitting end. A leak in the middle "O" ring cuases air to vent through the housing to the inside of the loop.
g

johnpsg@mac.com · 9th April 2007, 05:33

Quote: (Originally Posted by Gill Envy)

Michel, this sounds very much like a leaky ADV.. <clip> ...causing a flush of the loop leading the o2 level to drop at the sensors causing the solenoid to fire... <clip>

Gill,

Smart thinking. I guess the key thing is look to see if the ppO2 has risen significantly above setpoint when the over-inflated cl is discovered and the solenoid is found open. If way above setpoint, solenoid stuck. If near or below setpoint, probably a diluent leak into the cl.

John.

**Gill Envy** · 9th April 2007, 07:42

the way the problem mysteriously came and went so easily it just sounded like it could be as simple as an "o" ring not seating properly. With both our units this problem has come and gone, and ours too were baught in april of 06. Like I said, a swap out of all three "o"rings has illiminated the issue for now. The best thing to do is make sure it's not a leaky ADV before assuming it's something complex and selling the unit at such a loss with an ominous unknown malfunction. A leaky ADV has been a rather common issue for the evo...it's just worth rulling it out.

Quote: (Originally Posted by johnpsg@mac.com)

Gill,

Smart thinking. I guess the key thing is look to see if the ppO2 has risen significantly above setpoint when the over-inflated cl is discovered and the solenoid is found open. If way above setpoint, solenoid stuck. If near or below setpoint, probably a diluent leak into the cl.

John.

Michel2711 · 12th April 2007, 19:24

It happened after a good calibration and when I noticed the leak, the first symptom was the overinflated lungs and the handset displaying a 1.04 ppO2. Isn't this a sign that the O2 valve was stuck open ?

**Gill Envy** · 12th April 2007, 20:49

Not sure what the issue is, was just trying to offer what could be a simple fix. the other possible simple fix is to check the innerstage pressure of the o2. It's easy. the pressure guage that came with the unit plugs right into the o2 manual inflator hose. test with 1,000 psi in the o2 tank... should read 7.5 to 8 bar. Being too low or too high can cause a problem...another easy thing to fix.

hope that helps.

Quote: (Originally Posted by Michel2711)

It happened after a good calibration and when I noticed the leak, the first symptom was the overinflated lungs and the handset displaying a 1.04 ppO2. Isn't this a sign that the O2 valve was stuck open ?

Karl2 · 17th April 2007, 03:46

Quote: (Originally Posted by Michel2711)

It happened after a good calibration and when I noticed the leak, the first symptom was the overinflated lungs and the handset displaying a 1.04 ppO2. Isn't this a sign that the O2 valve was stuck open ?

Could it be as simple as you might have inadvertantly switched to the high set point (eg; 1.2) so the unit continued injecting O2?

Othewise, if the set point was still 0.7, then the alarm should have been working overtime?!

(apologies if this isn't applicable to the Evo, but could be the case on the Classic).

Michel2711 · 17th April 2007, 23:27

I feel sort of stupid now that you said it. It is quite obvious that since the O2 alarm didn't sounds, that's probably the explanation. At the time it happened, I was ready to go diving and was paying more attention to the symptoms than trying to analyze the reason.
Thanks a lot for your input !
Michel

3rd April 2007, 13:27	#1 (permalink)
Michel2711 New Member Current Rebreather/s: Evolution Other Rebreather/s: Join Date: Apr 2006 Location: New York Posts: 13	Evolution I bought it from Silent Diving Systems in April 2006, did approx. 40 dives with it. There was a problem with the electronic (a faulty diode, according to SDS) and AP Diving replaced the entire lid 3 months ago. The cells are also new and it can be returned to SDS next year for a free inspection / change of cells. I did only one dive since it was returned to me. There was one occurrence of the O2 valve remaining opened after calibration and although it did not happen again, I would recommend that the unit be inspected by a qualified technician before use. medium lung medium harness temp stick Auto Diluent and flow stop nitrox software yellow in very good condition (just a couple of scratches on the yellow cover and my name / phone # on the back of the cover). It also comes with a bracket for an additional diluent tank (value $200) right now in Cozumel, the unit will be in New York City in a week or so. I would like to sell it for usd 7000 + shipping.I can send pics upon request. Write at : michel@underwaterscapes.com
(Offline)

5th April 2007, 07:56	#2 (permalink)
johnpsg@mac.com New Member Current Rebreather/s: Evolution Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Join Date: Feb 2006 Location: Singapore Posts: 10	Re: Evolution Michel, I sent you an email direct, I'm certainly interested in buying. Wondering about your solenoid staying open. Was this the original problem? Diagnosed as a mechanical or software failure? Strange that it happened once more with a new lid and assuming APD replaced whatever hardware contained the faulty diode. Not something you'd want in the middle of a dive, for sure. If it was a software problem, it might only be a possibility as part of the calibration process. If hardware, could happen again any time, but in that case how come the replacement lid didn't cure it? Curious... John.
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5th April 2007, 14:08	#3 (permalink)
Michel2711 New Member Current Rebreather/s: Evolution Other Rebreather/s: Join Date: Apr 2006 Location: New York Posts: 13	Re: Evolution Hi John, thanks for the interest. The solenoid thing is independent from the reason why the lid was changed. The replacement for a new lid (back in January 07) was due to a defective diode which prevented the unit to start at all. The solenoid happened to me with the new lid after a successful calibration: I noticed that the lungs were overinflated and then realized that the O2 was still flowing (which the engine noise on the boat I could not hear it first). I don't think it's a software glitch (I have the most recent version), but more a mechanical problem with the valve that might have to be replaced. I sent a note to SDS (US dealer) about it and I'm waiting for an answer. After opening the lid and un-tightening / tightening the little know on the valve, it worked OK and I was able to dive without problem (on a shallow dive though where the risk of the valve getting stuck open would be minimal). Regards, Michel
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5th April 2007, 16:55	#4 (permalink)
Gill Envy Shearwater Copis Divers Current Rebreather/s: Other CCR Other Rebreather/s: Evolution Other CCR Join Date: Nov 2005 Location: seattle Posts: 1,348	Re: Evolution Quote: (Originally Posted by Michel2711) Hi John, thanks for the interest. The solenoid thing is independent from the reason why the lid was changed. The replacement for a new lid (back in January 07) was due to a defective diode which prevented the unit to start at all. The solenoid happened to me with the new lid after a successful calibration: I noticed that the lungs were overinflated and then realized that the O2 was still flowing (which the engine noise on the boat I could not hear it first). I don't think it's a software glitch (I have the most recent version), but more a mechanical problem with the valve that might have to be replaced. I sent a note to SDS (US dealer) about it and I'm waiting for an answer. After opening the lid and un-tightening / tightening the little know on the valve, it worked OK and I was able to dive without problem (on a shallow dive though where the risk of the valve getting stuck open would be minimal). Regards, Michel Michel, this sounds very much like a leaky ADV. We've had this issue before and resolved it ourselves. replacing the "o"rings in the banjo fitting on the ADV stopped leaks into the inhale counter lung. the leak was effectively causing a flush of the loop leading the o2 level to drop at the sensors causing the solenoid to fire and the lungs to overfill, it gave me the "heebee jeebees" till I figured it out. just a thought. Removing the loop from either end of the ADV can make it eisier to hear. submerging the adv while pressurized can reveal weather the leak is comming from the regulator part of the ADV or the other end, which is the banjo fitting end. A leak in the middle "O" ring cuases air to vent through the housing to the inside of the loop. g __________________ Gill Envy ...Because I wasn't born with gills! ><(°>><(°>><(°>><(°>><(°>><(°>><(°>><(°>
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9th April 2007, 05:33	#5 (permalink)
johnpsg@mac.com New Member Current Rebreather/s: Evolution Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Join Date: Feb 2006 Location: Singapore Posts: 10	Re: Evolution solenoid open Quote: (Originally Posted by Gill Envy) Michel, this sounds very much like a leaky ADV.. <clip> ...causing a flush of the loop leading the o2 level to drop at the sensors causing the solenoid to fire... <clip> Gill, Smart thinking. I guess the key thing is look to see if the ppO2 has risen significantly above setpoint when the over-inflated cl is discovered and the solenoid is found open. If way above setpoint, solenoid stuck. If near or below setpoint, probably a diluent leak into the cl. John.
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9th April 2007, 07:42	#6 (permalink)
Gill Envy Shearwater Copis Divers Current Rebreather/s: Other CCR Other Rebreather/s: Evolution Other CCR Join Date: Nov 2005 Location: seattle Posts: 1,348	Re: Evolution solenoid open the way the problem mysteriously came and went so easily it just sounded like it could be as simple as an "o" ring not seating properly. With both our units this problem has come and gone, and ours too were baught in april of 06. Like I said, a swap out of all three "o"rings has illiminated the issue for now. The best thing to do is make sure it's not a leaky ADV before assuming it's something complex and selling the unit at such a loss with an ominous unknown malfunction. A leaky ADV has been a rather common issue for the evo...it's just worth rulling it out. Quote: (Originally Posted by johnpsg@mac.com) Gill, Smart thinking. I guess the key thing is look to see if the ppO2 has risen significantly above setpoint when the over-inflated cl is discovered and the solenoid is found open. If way above setpoint, solenoid stuck. If near or below setpoint, probably a diluent leak into the cl. John. __________________ Gill Envy ...Because I wasn't born with gills! ><(°>><(°>><(°>><(°>><(°>><(°>><(°>><(°>
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12th April 2007, 19:24	#7 (permalink)
Michel2711 New Member Current Rebreather/s: Evolution Other Rebreather/s: Join Date: Apr 2006 Location: New York Posts: 13	Re: Evolution It happened after a good calibration and when I noticed the leak, the first symptom was the overinflated lungs and the handset displaying a 1.04 ppO2. Isn't this a sign that the O2 valve was stuck open ?
(Offline)

12th April 2007, 20:49	#8 (permalink)
Gill Envy Shearwater Copis Divers Current Rebreather/s: Other CCR Other Rebreather/s: Evolution Other CCR Join Date: Nov 2005 Location: seattle Posts: 1,348	Re: Evolution Not sure what the issue is, was just trying to offer what could be a simple fix. the other possible simple fix is to check the innerstage pressure of the o2. It's easy. the pressure guage that came with the unit plugs right into the o2 manual inflator hose. test with 1,000 psi in the o2 tank... should read 7.5 to 8 bar. Being too low or too high can cause a problem...another easy thing to fix. hope that helps. Quote: (Originally Posted by Michel2711) It happened after a good calibration and when I noticed the leak, the first symptom was the overinflated lungs and the handset displaying a 1.04 ppO2. Isn't this a sign that the O2 valve was stuck open ? __________________ Gill Envy ...Because I wasn't born with gills! ><(°>><(°>><(°>><(°>><(°>><(°>><(°>><(°>
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17th April 2007, 03:46	#9 (permalink)
Karl2 New Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Apr 2006 Location: Perth, Australia Posts: 7	Re: Evolution Quote: (Originally Posted by Michel2711) It happened after a good calibration and when I noticed the leak, the first symptom was the overinflated lungs and the handset displaying a 1.04 ppO2. Isn't this a sign that the O2 valve was stuck open ? Could it be as simple as you might have inadvertantly switched to the high set point (eg; 1.2) so the unit continued injecting O2? Othewise, if the set point was still 0.7, then the alarm should have been working overtime?! (apologies if this isn't applicable to the Evo, but could be the case on the Classic).
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17th April 2007, 23:27	#10 (permalink)
Michel2711 New Member Current Rebreather/s: Evolution Other Rebreather/s: Join Date: Apr 2006 Location: New York Posts: 13	Re: Evolution I feel sort of stupid now that you said it. It is quite obvious that since the O2 alarm didn't sounds, that's probably the explanation. At the time it happened, I was ready to go diving and was paying more attention to the symptoms than trying to analyze the reason. Thanks a lot for your input ! Michel
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