Cell warning !!

Pierre Farrugia · 11th December 2005, 09:48

Hello,

Yesterday I had a cell warning at the end of the dive ! During the dive was perfect, then at end of dive I decided to test the cells at 6m and see if they reach 1.6 PPo2 and they were ok. Then while surfacing I had a cell warning and was reading ppO2 of 0.2 and other two were 0.7. On land I switched YBOD off and on again without calibartion and reading was good again! Has this happened to you ? Was it some water on face?

UKSteve · 11th December 2005, 11:01

Which one was reading low?

Nick uk. · 11th December 2005, 11:17

How old were the cells, how many hours?

Nick uk. · 11th December 2005, 11:19

Quote: (Originally Posted by UKSteve)

Which one was reading low?

Even if it was cell 2, the other two cells should have givern a good reading. If in dout i would change all three cells.

UKSteve · 11th December 2005, 11:23

Quote: (Originally Posted by Nick uk.)

Even if it was cell 2, the other two cells should have givern a good reading. If in dout i would change all three cells.

If he was surfacing then he would probably have dropped the setpoint to 0.7 and so I assumed they were reading normally.

**JPJones** · 11th December 2005, 11:39

Quote: (Originally Posted by Pierre Farrugia)

Hello,

Yesterday I had a cell warning at the end of the dive ! During the dive was perfect, then at end of dive I decided to test the cells at 6m and see if they reach 1.6 PPo2 and they were ok. Then while surfacing I had a cell warning and was reading ppO2 of 0.2 and other two were 0.7. On land I switched YBOD off and on again without calibartion and reading was good again! Has this happened to you ? Was it some water on face?

It was probably water and if the mv reading are good 21% and 100% I wouldn't worry about it. If it happens again on the same sensor I would change it.

Juz · 11th December 2005, 12:46

I had a very similar cell warning at 65m this summer.

For me it turned out to be a corroded connection to the cell.

My unit is 3 years old and had never had the head serviced. Sent it back to APD who did the head service (New battery box, solenoid overhaul, strip back connections and redo) for £35.

Bargain I thought.

Juz

Pierre Farrugia · 11th December 2005, 17:07

Hello all,

Cells are 11months old - 70hrs usage. Set point was 0.7. I will cehck the connection tough, I even checked the cells 5min before with pure O2 and they hit 1.7 no problem!

jont · 11th December 2005, 19:56

Never heard of such a problem, generally speaking I replace my cells every 4-6 months. Was this the only time this happened? have you tried to recreate a similar situation to duplicate the issue?

**JPJones** · 11th December 2005, 20:17

Quote: (Originally Posted by Pierre Farrugia)

Hello all,

Cells are 11months old - 70hrs usage. Set point was 0.7. I will cehck the connection tough, I even checked the cells 5min before with pure O2 and they hit 1.7 no problem!

If it's 11 months old I would replace it.

11th December 2005, 09:48	#1 (permalink)
Pierre Farrugia Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Feb 2005 Location: Malta Posts: 636	Cell warning !! Hello, Yesterday I had a cell warning at the end of the dive ! During the dive was perfect, then at end of dive I decided to test the cells at 6m and see if they reach 1.6 PPo2 and they were ok. Then while surfacing I had a cell warning and was reading ppO2 of 0.2 and other two were 0.7. On land I switched YBOD off and on again without calibartion and reading was good again! Has this happened to you ? Was it some water on face? __________________ Pierre Farrugia My wife told me " If you don't quit diving I'm going to leave you" My reply " God, I'll miss you" www.atlam.org www.divemed.com
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11th December 2005, 11:01	#2 (permalink)
UKSteve Still a novice... Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Jul 2005 Location: Weymouth, UK Posts: 557	Re: Cell warning !! Which one was reading low?
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11th December 2005, 11:17	#3 (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: 579	Re: Cell warning !! How old were the cells, how many hours? __________________ If it aint broke....don't fix it, and if it is.............well......get another one! divechief2000@hotmail.com
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11th December 2005, 11:19	#4 (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: 579	Re: Cell warning !! Quote: (Originally Posted by UKSteve) Which one was reading low? Even if it was cell 2, the other two cells should have givern a good reading. If in dout i would change all three cells. __________________ If it aint broke....don't fix it, and if it is.............well......get another one! divechief2000@hotmail.com
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11th December 2005, 11:23	#5 (permalink)
UKSteve Still a novice... Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Jul 2005 Location: Weymouth, UK Posts: 557	Re: Cell warning !! Quote: (Originally Posted by Nick uk.) Even if it was cell 2, the other two cells should have givern a good reading. If in dout i would change all three cells. If he was surfacing then he would probably have dropped the setpoint to 0.7 and so I assumed they were reading normally.
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11th December 2005, 11:39	#6 (permalink)
JPJones O2ptima Test Dummy Current Rebreather/s: Inspiration Classic Megalodon Sport Kiss Classic Kiss Optima Titan Other Rebreather/s: Join Date: Sep 2005 Location: Florida Posts: 367	Re: Cell warning !! Quote: (Originally Posted by Pierre Farrugia) Hello, Yesterday I had a cell warning at the end of the dive ! During the dive was perfect, then at end of dive I decided to test the cells at 6m and see if they reach 1.6 PPo2 and they were ok. Then while surfacing I had a cell warning and was reading ppO2 of 0.2 and other two were 0.7. On land I switched YBOD off and on again without calibartion and reading was good again! Has this happened to you ? Was it some water on face? It was probably water and if the mv reading are good 21% and 100% I wouldn't worry about it. If it happens again on the same sensor I would change it. __________________ NSS/CDS Training Chairman www.jpjscuba.com
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11th December 2005, 12:46	#7 (permalink)
Juz Team Kinky Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Feb 2005 Location: London UK Posts: 146	Re: Cell warning !! I had a very similar cell warning at 65m this summer. For me it turned out to be a corroded connection to the cell. My unit is 3 years old and had never had the head serviced. Sent it back to APD who did the head service (New battery box, solenoid overhaul, strip back connections and redo) for £35. Bargain I thought. Juz __________________ ~KINKY DIVERS~ Because going down is fun We are all prompted by the same motives, all deceived by the same fallacies, all animated by hope, obstructed by danger, entangled by desire and seduced by pleasure. Welcome to Kinky Divers!
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11th December 2005, 17:07	#8 (permalink)
Pierre Farrugia Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Feb 2005 Location: Malta Posts: 636	Re: Cell warning !! Hello all, Cells are 11months old - 70hrs usage. Set point was 0.7. I will cehck the connection tough, I even checked the cells 5min before with pure O2 and they hit 1.7 no problem! __________________ Pierre Farrugia My wife told me " If you don't quit diving I'm going to leave you" My reply " God, I'll miss you" www.atlam.org www.divemed.com
(Offline)

11th December 2005, 19:56	#9 (permalink)
jont Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Megalodon Prism Topaz Join Date: Oct 2005 Location: New York, NY USA Posts: 191	Re: Cell warning !! Never heard of such a problem, generally speaking I replace my cells every 4-6 months. Was this the only time this happened? have you tried to recreate a similar situation to duplicate the issue?
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11th December 2005, 20:17	#10 (permalink)
JPJones O2ptima Test Dummy Current Rebreather/s: Inspiration Classic Megalodon Sport Kiss Classic Kiss Optima Titan Other Rebreather/s: Join Date: Sep 2005 Location: Florida Posts: 367	Re: Cell warning !! Quote: (Originally Posted by Pierre Farrugia) Hello all, Cells are 11months old - 70hrs usage. Set point was 0.7. I will cehck the connection tough, I even checked the cells 5min before with pure O2 and they hit 1.7 no problem! If it's 11 months old I would replace it. __________________ NSS/CDS Training Chairman www.jpjscuba.com
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