Meg cell checker idea

sensor330 · 1st November 2009, 05:12

I been thinking of using the gray storage plug that came with my meg to

check my cells. I have a extra loop and was thinking of taking it apart and

using the the pieces that screw the hoses onto the top of the can to hold

down those gray storage plugs. In one of the plugs I'd have a pressure

gauge and in the other I'd have some means of adding gas to the canister. I

tested my idea today but I just held the plugs in place and was able to add

enough air to make my cells read .42 which would've been about 13 psi.

Anybody have any thought on this idea?

Scott

wedivebc · 1st November 2009, 05:19

Quote: (Originally Posted by sensor330)

I been thinking of using the gray storage plug that came with my meg to

check my cells. I have a extra loop and was thinking of taking it apart and

using the the pieces that screw the hoses onto the top of the can to hold

down those gray storage plugs. In one of the plugs I'd have a pressure

gauge and in the other I'd have some means of adding gas to the canister. I

tested my idea today but I just held the plugs in place and was able to add

enough air to make my cells read .42 which would've been about 13 psi.

Anybody have any thought on this idea?

Scott

The pressure will damage the meg head. It will take quite a bit of O2 to fill the Rebreather. I only know because I thought about something like that before and Leon said it was a bad idea

sensor330 · 1st November 2009, 05:29

Quote: (Originally Posted by wedivebc)

The pressure will damage the meg head. It will take quite a bit of O2 to fill the Rebreather. I only know because I thought about something like that before and Leon said it was a bad idea

Should take all that much O2 to fill just the canister. Do use remember what he was thinking it might damage? If its the plate I was thinking of alternate ways to hold the head on instead the the 4 SS latches for the testing. I only need to pressurized the can to about 12 psi of O2 to check my cells.

sensor330 · 1st November 2009, 05:42

Come to think of it when I went to ISC for a software upgrade the whole head was put into a pressure pot so the reading could be checked. I'll have to take a closer look at the fittings on top of the head.

wedivebc · 1st November 2009, 06:00

Quote: (Originally Posted by sensor330)

Come to think of it when I went to ISC for a software upgrade the whole head was put into a pressure pot so the reading could be checked. I'll have to take a closer look at the fittings on top of the head.

If you apply 14.7 psi to the can you will apply about 454lbs of force to the head.

Lancer4545 · 1st November 2009, 07:19

I can see how you could think this might work but it is fraught with danger.

The head and latches are not designed to cope with any pressure differential and it would soon bend the latches and blow the head off not to mention the pressure could potentially distort the head and cause any number of other problems.

You stand to damage the head and if it would let go it could turn it into a missile too.

If you want to check your cells why not get a Narked@90 cell checker or just perform a linearity check at the beginning of your dive.

Regards,

Lance

jkaterenchuk · 1st November 2009, 11:44

Why not take the sensor carriage with cells still attached and make a trip to your local hardware/plumbing store and see what they have that fits and you can use to DIY. Not quite as easy as using the whole head but its not too difficult or PIA to take off the molex connectors and remove the sensor carriage to do the testing.

John

kevin stone · 1st November 2009, 12:20

Quote: (Originally Posted by jkaterenchuk)

Why not take the sensor carriage with cells still attached and make a trip to your local hardware/plumbing store and see what they have that fits and you can use to DIY. Not quite as easy as using the whole head but its not too difficult or PIA to take off the molex connectors and remove the sensor carriage to do the testing.

John

John thats a great idea, I will have to try it.

sensor330 · 1st November 2009, 15:21

Quote: (Originally Posted by wedivebc)

If you apply 14.7 psi to the can you will apply about 454lbs of force to the head.

I realize that. Just throwing the idea out there.

sensor330 · 1st November 2009, 15:27

Quote: (Originally Posted by Lancer4545)

I can see how you could think this might work but it is fraught with danger.

The head and latches are not designed to cope with any pressure differential and it would soon bend the latches and blow the head off not to mention the pressure could potentially distort the head and cause any number of other problems.

You stand to damage the head and if it would let go it could turn it into a missile too.

If you want to check your cells why not get a Narked@90 cell checker or just perform a linearity check at the beginning of your dive.

Regards,

Lance

I also check my cells for linearity at the beginning and end of every dive, it never hurts to be a bit more cautious. After all cells are the Achilles heal of rebreathers. I've been thinking of ways to hold down the head other then the latches.

1st November 2009, 05:12	#1 (permalink)
sensor330 RBW Member Join Date: Feb 2005 Location: Victoria, British Columbia, Canada Posts: 720	Meg cell checker idea I been thinking of using the gray storage plug that came with my meg to check my cells. I have a extra loop and was thinking of taking it apart and using the the pieces that screw the hoses onto the top of the can to hold down those gray storage plugs. In one of the plugs I'd have a pressure gauge and in the other I'd have some means of adding gas to the canister. I tested my idea today but I just held the plugs in place and was able to add enough air to make my cells read .42 which would've been about 13 psi. Anybody have any thought on this idea? Scott
(Offline)

1st November 2009, 05:19	#2 (permalink)
wedivebc Dave Tomblin Megalodon ISC Pathfinder Join Date: Feb 2005 Location: Vancouver Island BC Canada Posts: 1,969	Re: Meg cell checker idea Quote: (Originally Posted by sensor330) I been thinking of using the gray storage plug that came with my meg to check my cells. I have a extra loop and was thinking of taking it apart and using the the pieces that screw the hoses onto the top of the can to hold down those gray storage plugs. In one of the plugs I'd have a pressure gauge and in the other I'd have some means of adding gas to the canister. I tested my idea today but I just held the plugs in place and was able to add enough air to make my cells read .42 which would've been about 13 psi. Anybody have any thought on this idea? Scott The pressure will damage the meg head. It will take quite a bit of O2 to fill the Rebreather. I only know because I thought about something like that before and Leon said it was a bad idea
(Online)

1st November 2009, 05:29	#3 (permalink)
sensor330 RBW Member Join Date: Feb 2005 Location: Victoria, British Columbia, Canada Posts: 720	Re: Meg cell checker idea Quote: (Originally Posted by wedivebc) The pressure will damage the meg head. It will take quite a bit of O2 to fill the Rebreather. I only know because I thought about something like that before and Leon said it was a bad idea Should take all that much O2 to fill just the canister. Do use remember what he was thinking it might damage? If its the plate I was thinking of alternate ways to hold the head on instead the the 4 SS latches for the testing. I only need to pressurized the can to about 12 psi of O2 to check my cells.
(Offline)

1st November 2009, 05:42	#4 (permalink)
sensor330 RBW Member Join Date: Feb 2005 Location: Victoria, British Columbia, Canada Posts: 720	Re: Meg cell checker idea Come to think of it when I went to ISC for a software upgrade the whole head was put into a pressure pot so the reading could be checked. I'll have to take a closer look at the fittings on top of the head.
(Offline)

1st November 2009, 06:00	#5 (permalink)
wedivebc Dave Tomblin Megalodon ISC Pathfinder Join Date: Feb 2005 Location: Vancouver Island BC Canada Posts: 1,969	Re: Meg cell checker idea Quote: (Originally Posted by sensor330) Come to think of it when I went to ISC for a software upgrade the whole head was put into a pressure pot so the reading could be checked. I'll have to take a closer look at the fittings on top of the head. If you apply 14.7 psi to the can you will apply about 454lbs of force to the head.
(Online)

1st November 2009, 07:19	#6 (permalink)
Lancer4545 Customise Me! Megalodon/Shearwater Join Date: Jun 2007 Location: Cairns QLD Australia Posts: 1,146	Re: Meg cell checker idea I can see how you could think this might work but it is fraught with danger. The head and latches are not designed to cope with any pressure differential and it would soon bend the latches and blow the head off not to mention the pressure could potentially distort the head and cause any number of other problems. You stand to damage the head and if it would let go it could turn it into a missile too. If you want to check your cells why not get a Narked@90 cell checker or just perform a linearity check at the beginning of your dive. Regards, Lance __________________ You can run but you can't hide! ISC Appointed Megalodon Dealer for East Australia ISC Trained Megalodon Instructor & Service Technician http://www.closedcircuitdivers.com.au info@closedcircuitdivers.com.au
(Offline)

1st November 2009, 11:44	#7 (permalink)
jkaterenchuk . HammerMeg Kiss Classic, Inspiration Join Date: May 2006 Location: PA Posts: 1,917	Re: Meg cell checker idea Why not take the sensor carriage with cells still attached and make a trip to your local hardware/plumbing store and see what they have that fits and you can use to DIY. Not quite as easy as using the whole head but its not too difficult or PIA to take off the molex connectors and remove the sensor carriage to do the testing. John
(Online)

1st November 2009, 12:20	#8 (permalink)
kevin stone RBW Member Classic Kiss Hammerhead Sport Kiss Hammerhead Join Date: Jun 2005 Location: us ct. Posts: 434	Re: Meg cell checker idea Quote: (Originally Posted by jkaterenchuk) Why not take the sensor carriage with cells still attached and make a trip to your local hardware/plumbing store and see what they have that fits and you can use to DIY. Not quite as easy as using the whole head but its not too difficult or PIA to take off the molex connectors and remove the sensor carriage to do the testing. John John thats a great idea, I will have to try it.
(Offline)

1st November 2009, 15:21	#9 (permalink)
sensor330 RBW Member Join Date: Feb 2005 Location: Victoria, British Columbia, Canada Posts: 720	Re: Meg cell checker idea Quote: (Originally Posted by wedivebc) If you apply 14.7 psi to the can you will apply about 454lbs of force to the head. I realize that. Just throwing the idea out there.
(Offline)

1st November 2009, 15:27	#10 (permalink)
sensor330 RBW Member Join Date: Feb 2005 Location: Victoria, British Columbia, Canada Posts: 720	Re: Meg cell checker idea Quote: (Originally Posted by Lancer4545) I can see how you could think this might work but it is fraught with danger. The head and latches are not designed to cope with any pressure differential and it would soon bend the latches and blow the head off not to mention the pressure could potentially distort the head and cause any number of other problems. You stand to damage the head and if it would let go it could turn it into a missile too. If you want to check your cells why not get a Narked@90 cell checker or just perform a linearity check at the beginning of your dive. Regards, Lance I also check my cells for linearity at the beginning and end of every dive, it never hurts to be a bit more cautious. After all cells are the Achilles heal of rebreathers. I've been thinking of ways to hold down the head other then the latches.
(Offline)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode