Stuck solenoid in open position during dive?

Peter M · 9th October 2007, 15:50

Now i am thinking out loud but does a boris not have this type of problem (guess what i am buying) am still confused but its that time of night sorry all !

Peter

Quote: (Originally Posted by Mark Chase)

I may be wrong Peter but i assume the master hand set stopped/froze/hung showing 1.3 and in the middle of firing the solenoid. So the hand sets don't register the problem as they are stuck on 1.3 and the solenoid fires in 02 continuously.

I also assume that with the master frozen on 1.3 no audible alarms will sound. Only the slave will be showing max pp02 but if it doesn't independently control the warning buzzers then its useless unless you happen to look at it.

Which of course, you should do every min or so.

Other units have better design like the Hammer Head where the warning s on the HUD and DIVA are controlled by an independently powered and calibrated secondary hand set and the master just controls the deco and the solenoid.

This sort of hanging problem is why i don't like the single hand set on the Vision.

ATB

Mark Chase

peter · 9th October 2007, 15:53

Quote: (Originally Posted by Blomman)

In real life (and not on the internet), how common is it that a solenoid gets stuck in the open position during a dive?

// Blomman

None for me, not stuck open or closed in little over five years /360 Hours with the Inspo.

AD_ward9 · 9th October 2007, 16:03

Quote: (Originally Posted by Peter M)

Now i am thinking out loud but does a boris not have this type of problem (guess what i am buying) am still confused but its that time of night sorry all !

Peter

Very improbable on a Boris, at least as far as electronics is concerned.

All rebreathers that use solenoids are liable to have them stick on. Sticking off is much more common (they are off, much more than on).

Alex

Peter M · 9th October 2007, 16:05

good enough for me

Quote: (Originally Posted by AD_ward9)

Very improbable on a Boris.

Alex

Mark Chase · 9th October 2007, 19:53

Quote: (Originally Posted by AD_ward9)

Your assumptions are all spot on.

Without an ADV, people do not optimise their loop so well in terms of volume.

Alex

Interesting point. I have to say its much easier running minimum loop with an ADV.

ATB

Mark

narked at 90 · 9th October 2007, 20:35

I had my solenoid stick open last year (classic inspo back lite hand sets)
just reached depth and every thing was fine, then a minute later it all when pear shaped i can only guess at what my po2 was as the hand sets give out at 2.55 but my po2 would have been more at 3.5
the unit had 12 dives on it since the last service so was sent back for investigation(no problems found!!!!) but the filter screen was missing when unit returned.
kind regards john routley

Mixaddict · 10th October 2007, 06:31

Had my solonoid stick open when I hit depth at 330 feet. Scared the crap out of me, but I dealt with it, and feathered my valve at depth, until it got unstuck. I was making a terrible scraping noise, so I am assuming that it got some gunk stuck in it, that eventually broke loose. This was 2 years ago, and have not had a problem since. Just keep you eye on your PO2 and it shouldn't be the end of the world!

jhaaja · 10th October 2007, 06:38

It is nice to have a BOV if the solenoid sticks. PpO2 will spike hard and fast if you are deep and you don´t want to breathe it...

Mixaddict, how high did the ppO2 jump and how fast?

For the record my solenoids have always worked just fine.

JH

9th October 2007, 15:50	#11 (permalink)
Peter M New Member Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Mar 2007 Location: Northern Ireland Posts: 52	Re: Stuck solenoid in open position during dive? Now i am thinking out loud but does a boris not have this type of problem (guess what i am buying) am still confused but its that time of night sorry all ! Peter Quote: (Originally Posted by Mark Chase) I may be wrong Peter but i assume the master hand set stopped/froze/hung showing 1.3 and in the middle of firing the solenoid. So the hand sets don't register the problem as they are stuck on 1.3 and the solenoid fires in 02 continuously. I also assume that with the master frozen on 1.3 no audible alarms will sound. Only the slave will be showing max pp02 but if it doesn't independently control the warning buzzers then its useless unless you happen to look at it. Which of course, you should do every min or so. Other units have better design like the Hammer Head where the warning s on the HUD and DIVA are controlled by an independently powered and calibrated secondary hand set and the master just controls the deco and the solenoid. This sort of hanging problem is why i don't like the single hand set on the Vision. ATB Mark Chase
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9th October 2007, 15:53	#12 (permalink)
peter New Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Jan 2005 Location: Göteborg/Sweden Posts: 47	Re: Stuck solenoid in open position during dive? Quote: (Originally Posted by Blomman) In real life (and not on the internet), how common is it that a solenoid gets stuck in the open position during a dive? // Blomman None for me, not stuck open or closed in little over five years /360 Hours with the Inspo. __________________ Peter
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9th October 2007, 16:03	#13 (permalink)
AD_ward9 So much more to learn Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Jun 2005 Location: Scotland Posts: 1,875	Re: Stuck solenoid in open position during dive? Quote: (Originally Posted by Peter M) Now i am thinking out loud but does a boris not have this type of problem (guess what i am buying) am still confused but its that time of night sorry all ! Peter Very improbable on a Boris, at least as far as electronics is concerned. All rebreathers that use solenoids are liable to have them stick on. Sticking off is much more common (they are off, much more than on). Alex Last edited by AD_ward9 : 9th October 2007 at 17:00.
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9th October 2007, 16:05	#14 (permalink)
Peter M New Member Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Mar 2007 Location: Northern Ireland Posts: 52	Re: Stuck solenoid in open position during dive? good enough for me Quote: (Originally Posted by AD_ward9) Very improbable on a Boris. Alex
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9th October 2007, 19:53	#15 (permalink)
Mark Chase I go down for ages Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Jan 2005 Location: Kent Posts: 2,700	Re: Stuck solenoid in open position during dive? Quote: (Originally Posted by AD_ward9) Your assumptions are all spot on. Without an ADV, people do not optimise their loop so well in terms of volume. Alex Interesting point. I have to say its much easier running minimum loop with an ADV. ATB Mark __________________ Is it supposed to make that noise ? I took my unit to the dive shop and demanded they bolt on every thing that would fit. Join my elite diving teem and get a Tshirt "Doing It Chasey"Hammerhead Eccr Advanced Diving System
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9th October 2007, 20:35	#16 (permalink)
narked at 90 John Routley Current Rebreather/s: Inspiration Classic Other CCR Dolphin Home Build Other Rebreather/s: Other CCR Dolphin Home Build Join Date: Feb 2005 Location: middlands uk Posts: 1,029	Re: Stuck solenoid in open position during dive? I had my solenoid stick open last year (classic inspo back lite hand sets) just reached depth and every thing was fine, then a minute later it all when pear shaped i can only guess at what my po2 was as the hand sets give out at 2.55 but my po2 would have been more at 3.5 the unit had 12 dives on it since the last service so was sent back for investigation(no problems found!!!!) but the filter screen was missing when unit returned. kind regards john routley __________________ CHECK OUT OUR INTERWEBS FOR CUSTOM REBREATHER UPGRADES *WWW.NARKEDAT90.CO.UK* *WWW.GRPSERVICES.COM*
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10th October 2007, 06:31	#17 (permalink)
Mixaddict Always Learning! Current Rebreather/s: Inspiration Vision Evolution Other CCR Dolphin Other Rebreather/s: Inspiration Classic Other CCR Dolphin Join Date: Jan 2006 Location: Draper, Utah USA Posts: 477	Re: Stuck solenoid in open position during dive? Had my solonoid stick open when I hit depth at 330 feet. Scared the crap out of me, but I dealt with it, and feathered my valve at depth, until it got unstuck. I was making a terrible scraping noise, so I am assuming that it got some gunk stuck in it, that eventually broke loose. This was 2 years ago, and have not had a problem since. Just keep you eye on your PO2 and it shouldn't be the end of the world! __________________ Randy Thornton (MixAddict) Inspiration, Evolution,Hammerhead & Sentinel CCR Instructor
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10th October 2007, 06:38	#18 (permalink)
jhaaja Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Mar 2005 Location: Finland Posts: 885	Re: Stuck solenoid in open position during dive? It is nice to have a BOV if the solenoid sticks. PpO2 will spike hard and fast if you are deep and you don´t want to breathe it... Mixaddict, how high did the ppO2 jump and how fast? For the record my solenoids have always worked just fine. JH
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