one cell giving high PO2 readout

weirdo1 · 7th January 2008, 06:44

Here's a question for the real experienced (rEvo) CCR divers (witch i'm not)
I dive one rEvodream on one cell and the other on two cells

I calibrated my cell's following procedure.

On air all the cells read a po2 of ~0,21. On O2 alle the cells read ~1.0 (On surface) So far OK.

While diving the readout of the cells begin to differ. On the 2 cell rEvodream the difference between the cells in small (~0.01 till 0.03) but if I compare it with the one cell rEvodream the difference is much larger ( ~0.10 higher), with causes a “high” po2 signal on 1C RD, while the 2C RD is perfectly on setpoint (cont. green)
I even had a low and high signal at the same time (on different HUD’s)

After the dive the readout of all the cells are more or less the same (0.01 or less)

Till a coupele of dives ago it wasn't a problem. Both RD and cell readouds were more or less the same.
How can this be? The unit and the cells done about 6 hours of diving. What do I do? Its really bugging me.

paulraymaekers · 7th January 2008, 08:27

Quote: (Originally Posted by weirdo1)

Here's a question for the real experienced (rEvo) CCR divers (witch i'm not)
I dive one rEvodream on one cell and the other on two cells

I calibrated my cell's following procedure.

On air all the cells read a po2 of ~0,21. On O2 alle the cells read ~1.0 (On surface) So far OK.

While diving the readout of the cells begin to differ. On the 2 cell rEvodream the difference between the cells in small (~0.01 till 0.03) but if I compare it with the one cell rEvodream the difference is much larger ( ~0.10 higher), with causes a “high” po2 signal on 1C RD, while the 2C RD is perfectly on setpoint (cont. green)
I even had a low and high signal at the same time (on different HUD’s)

After the dive the readout of all the cells are more or less the same (0.01 or less)

Till a coupele of dives ago it wasn't a problem. Both RD and cell readouds were more or less the same.
How can this be? The unit and the cells done about 6 hours of diving. What do I do? Its really bugging me.

Hello Weirdo ??

what is the serie-number of the cells??
best to PM me

regards
paul

anton610 · 7th January 2008, 10:25

Quote: (Originally Posted by weirdo1)

Here's a question for the real experienced (rEvo) CCR divers (witch i'm not)
I dive one rEvodream on one cell and the other on two cells

I calibrated my cell's following procedure.

On air all the cells read a po2 of ~0,21. On O2 alle the cells read ~1.0 (On surface) So far OK.

While diving the readout of the cells begin to differ. On the 2 cell rEvodream the difference between the cells in small (~0.01 till 0.03) but if I compare it with the one cell rEvodream the difference is much larger ( ~0.10 higher), with causes a “high” po2 signal on 1C RD, while the 2C RD is perfectly on setpoint (cont. green)
I even had a low and high signal at the same time (on different HUD’s)

After the dive the readout of all the cells are more or less the same (0.01 or less)

Till a coupele of dives ago it wasn't a problem. Both RD and cell readouds were more or less the same.
How can this be? The unit and the cells done about 6 hours of diving. What do I do? Its really bugging me.

Had the sam problem with my evocells!

New cell... everything allright!

Hanssing · 7th January 2008, 10:31

Quote: (Originally Posted by weirdo1)

While diving the readout of the cells begin to differ. On the 2 cell rEvodream the difference between the cells in small (~0.01 till 0.03) but if I compare it with the one cell rEvodream the difference is much larger ( ~0.10 higher), with causes a “high” po2 signal on 1C RD, while the 2C RD is perfectly on setpoint (cont. green)
I even had a low and high signal at the same time (on different HUD’s)

Hi Weirdo,

Two of my rEvo-cells did exactly the same. Bought some new ones:
The first I recieved was a Teldyne. This reacts FAST compared to the AII.
The next two ones were AII, but form the infamous batch with errors.

I REALLY don't like cells right now......

Nicolai

J. V. · 7th January 2008, 16:59

It's probably a cell failure.
Some month ago I've tested few cells on my rEvodreams, after calibration all given 1.00 at surface. A six meter on pure O2 one come to give too much, around 1.70. At 40 meters the same give 4.00

. Back on surface after one hour dive it give around .21 in air...

weirdo1 · 10th January 2008, 07:00

Quote: (Originally Posted by paulraymaekers)

Hello Weirdo ??

what is the serie-number of the cells??
best to PM me

regards
paul

u have a PM

weirdo1 · 21st January 2008, 16:50

Paul replaced ALL my cells!

(unused spare cell as well)

My cells weren't from the recall batch, but close enough to replace them.

Tnx Paul, great service!

7th January 2008, 06:44	#1 (permalink)
weirdo1 New Member Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Aug 2007 Location: The Netherlands Posts: 45	one cell giving high PO2 readout Here's a question for the real experienced (rEvo) CCR divers (witch i'm not) I dive one rEvodream on one cell and the other on two cells I calibrated my cell's following procedure. On air all the cells read a po2 of ~0,21. On O2 alle the cells read ~1.0 (On surface) So far OK. While diving the readout of the cells begin to differ. On the 2 cell rEvodream the difference between the cells in small (~0.01 till 0.03) but if I compare it with the one cell rEvodream the difference is much larger ( ~0.10 higher), with causes a “high” po2 signal on 1C RD, while the 2C RD is perfectly on setpoint (cont. green) I even had a low and high signal at the same time (on different HUD’s) After the dive the readout of all the cells are more or less the same (0.01 or less) Till a coupele of dives ago it wasn't a problem. Both RD and cell readouds were more or less the same. How can this be? The unit and the cells done about 6 hours of diving. What do I do? Its really bugging me. __________________ Weirdo has rEvolved Last edited by weirdo1 : 7th January 2008 at 06:54.
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7th January 2008, 08:27	#2 (permalink)
paulraymaekers rEvo's daddy Current Rebreather/s: rEvo Other CCR Home Build Other Rebreather/s: rEvo Other CCR Home Build Join Date: May 2005 Location: belgium Posts: 1,432	Re: one cell giving high PO2 readout Quote: (Originally Posted by weirdo1) Here's a question for the real experienced (rEvo) CCR divers (witch i'm not) I dive one rEvodream on one cell and the other on two cells I calibrated my cell's following procedure. On air all the cells read a po2 of ~0,21. On O2 alle the cells read ~1.0 (On surface) So far OK. While diving the readout of the cells begin to differ. On the 2 cell rEvodream the difference between the cells in small (~0.01 till 0.03) but if I compare it with the one cell rEvodream the difference is much larger ( ~0.10 higher), with causes a “high” po2 signal on 1C RD, while the 2C RD is perfectly on setpoint (cont. green) I even had a low and high signal at the same time (on different HUD’s) After the dive the readout of all the cells are more or less the same (0.01 or less) Till a coupele of dives ago it wasn't a problem. Both RD and cell readouds were more or less the same. How can this be? The unit and the cells done about 6 hours of diving. What do I do? Its really bugging me. Hello Weirdo ?? what is the serie-number of the cells?? best to PM me regards paul __________________ www.rEvo-rebreathers.com .... the earth is flat, Elvis is alive, and radial scrubbers give longer dwell time than axials...
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7th January 2008, 10:25	#3 (permalink)
anton610 toni the strange Current Rebreather/s: Evolution Other CCR Other Rebreather/s: Other CCR Join Date: May 2006 Location: austria Posts: 170	Re: one cell giving high PO2 readout Quote: (Originally Posted by weirdo1) Here's a question for the real experienced (rEvo) CCR divers (witch i'm not) I dive one rEvodream on one cell and the other on two cells I calibrated my cell's following procedure. On air all the cells read a po2 of ~0,21. On O2 alle the cells read ~1.0 (On surface) So far OK. While diving the readout of the cells begin to differ. On the 2 cell rEvodream the difference between the cells in small (~0.01 till 0.03) but if I compare it with the one cell rEvodream the difference is much larger ( ~0.10 higher), with causes a “high” po2 signal on 1C RD, while the 2C RD is perfectly on setpoint (cont. green) I even had a low and high signal at the same time (on different HUD’s) After the dive the readout of all the cells are more or less the same (0.01 or less) Till a coupele of dives ago it wasn't a problem. Both RD and cell readouds were more or less the same. How can this be? The unit and the cells done about 6 hours of diving. What do I do? Its really bugging me. Had the sam problem with my evocells! New cell... everything allright! __________________ "Das Übel kommt nicht von der Technik, sondern von denen, die sie mißbrauchen." Jacques-Yves Cousteau (1910-1997)
(Online)

7th January 2008, 10:31	#4 (permalink)
Hanssing flap-flop ..... flap-flop Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Nov 2005 Location: Denmark Posts: 370	Re: one cell giving high PO2 readout Quote: (Originally Posted by weirdo1) While diving the readout of the cells begin to differ. On the 2 cell rEvodream the difference between the cells in small (~0.01 till 0.03) but if I compare it with the one cell rEvodream the difference is much larger ( ~0.10 higher), with causes a “high” po2 signal on 1C RD, while the 2C RD is perfectly on setpoint (cont. green) I even had a low and high signal at the same time (on different HUD’s) Hi Weirdo, Two of my rEvo-cells did exactly the same. Bought some new ones: The first I recieved was a Teldyne. This reacts FAST compared to the AII. The next two ones were AII, but form the infamous batch with errors. I REALLY don't like cells right now...... Nicolai __________________ Woohooo - I can change my rEvo! Its going to be bitchin' tricked out piece of gear
(Online)

7th January 2008, 16:59	#5 (permalink)
J. V. Custom Title Allowed! Current Rebreather/s: rEvo Other Rebreather/s: Not Bought Yet rEvo Join Date: Mar 2006 Location: Lot & Savoie Posts: 233	Re: one cell giving high PO2 readout It's probably a cell failure. Some month ago I've tested few cells on my rEvodreams, after calibration all given 1.00 at surface. A six meter on pure O2 one come to give too much, around 1.70. At 40 meters the same give 4.00 . Back on surface after one hour dive it give around .21 in air... __________________ -------------------- Jacques NPSFQQA-EDS IT # 007 (remué non agité)
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10th January 2008, 07:00	#6 (permalink)
weirdo1 New Member Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Aug 2007 Location: The Netherlands Posts: 45	Re: one cell giving high PO2 readout Quote: (Originally Posted by paulraymaekers) Hello Weirdo ?? what is the serie-number of the cells?? best to PM me regards paul u have a PM __________________ Weirdo has rEvolved
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21st January 2008, 16:50	#7 (permalink)
weirdo1 New Member Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Aug 2007 Location: The Netherlands Posts: 45	Re: one cell giving high PO2 readout Paul replaced ALL my cells!(unused spare cell as well) My cells weren't from the recall batch, but close enough to replace them. Tnx Paul, great service! __________________ Weirdo has rEvolved
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