Megalodon Calibration Procedures

Drmike · 6th April 2006, 11:46

I feel it is important to ask questions about Meg calibration, and to know if its easy to screw it up. thats all I have in mind here.

I would hope that we put peoples safety above our own personal pride in gear choices - unfortunately based on the pms Ive been recieving people just dont do that. They dont want to discuss in public some stuff.

We cant have an honest open unbiased discussion about Rbs on other non Rebreather forums - surely we can have one here.

DonalWalsh · 6th April 2006, 11:48

The way I see it the discussion might have identified a source of error with my cal that I might improve on .......doesn't conclude anything about what may have happened to anyone else, but useful none the less.

***schford*** · 6th April 2006, 11:49

Quote: (Originally Posted by Drmike)

No thats not what is happening and I resent the suggestion

Im asking questions about Meg calibration and if its easy to screw it up thats all -

Sorry Mike - I didn't mean to imply anything but thats how it will be read....I guess I misread it first time around - I should know better.

rogeringebo · 6th April 2006, 11:49

I analyse the gas where I fill it (in the diveshop)
When I callibrate at home I dont put a analyzer behind the head...can I still get this problem?
I use the 2 blindplugs that comes with the rebreather...one I plug the top of the head with and that one has the hose and flowrestrictor...the other blindplug I hold blocking the bottom of the head (it has a hole in it)
This is how I was taught to do it.....should I do it different?

decoweenie · 6th April 2006, 11:50

Quote: (Originally Posted by schford)

... before we even find out what happened ...

Will we ever know what happened ? Heart attack, again ?

Do we know what happened on the other Meg fatalities this year yet ? Were they all heart attacks ?

Should we remain silent and just wait for more fatalities ?

I know I will get flamed, but unless I remember wrong, there are more fatalities in one year period involving Meg divers than any other units so far. What IS wrong ? Or only divers with heart-condition attracted to the Meg ?

JonnyB · 6th April 2006, 11:54

Quote: (Originally Posted by decoweenie)

Will we ever know what happened ? Heart attack, again ?

Do we know what happened on the other Meg fatalities this year yet ? Were they all heart attacks ?

Should we remain silent and just wait for more fatalities ?

I know I will get flamed, but unless I remember wrong, there are more fatalities in one year period involving Meg divers than any other units so far. What IS wrong ? Or only divers with heart-condition attracted to the Meg ?

I know there were quite a few ftalities on the Meg last year(2005), but to my knowledge this is the first one so far in 2006, or am i wrong?

/Jonny

rogeringebo · 6th April 2006, 11:55

I agree...well said Decoweenie....
If the accident involved me or someone I know personally,I would like to help creating safer routines for all Rebreather divers......period....
But I also understand the sensitive nature of the matter but think its not a good enough reason not to talk about the problems...

Just my 5 cents

***jradomski*** · 6th April 2006, 12:16

Quote: (Originally Posted by DonalWalsh)

Thanks Joe thats very informative especially for the less technical among us.

If I understand you correctly we'd be best connecting the cal kit (for the o2 part of calibration) as usual but leaving thethe analyser end free, flowing o2 throught the head for a few minutes until the cells stablise and THEN connect the analyser ?

no connect the analyzer to monitor the progress, once it reaches the proper reading DISCONNECT it then calibrate.

Drmike · 6th April 2006, 12:20

Do all Meg users use the same calibration method/kit?

***jradomski*** · 6th April 2006, 12:24

Quote: (Originally Posted by rogeringebo)

I analyse the gas where I fill it (in the diveshop)
When I callibrate at home I dont put a analyzer behind the head...can I still get this problem?
I use the 2 blindplugs that comes with the rebreather...one I plug the top of the head with and that one has the hose and flowrestrictor...the other blindplug I hold blocking the bottom of the head (it has a hole in it)
This is how I was taught to do it.....should I do it different?

How do you know when the loop is perfectly flushed with oxygen??

You should always use an analyzer if possible to verify the gas comming out is as it was analyzed, once you know this its time to calibrate just make sure there is a free path for the gas.. ideally the diameter of any opening should be as large (or larger) as the tube feeding the oxygen in..

The sampling end of most analyzers have a very small opening so this creates back presure..

for the meg the best place is to feed the oxygen in (with the head off) down the center opening, and put a plug in the bottom opening (what goes into the scrubber) - hook the meter here, then once its stable, remove the meter and let gas flow unrestricted..

6th April 2006, 11:46	#11 (permalink)
Drmike RBW Member Current Rebreather/s: MK 15.X Ouroboros Other CCR Home Build Other Rebreather/s: Inspiration Classic Other CCR Home Build Join Date: Feb 2005 Posts: 3,378	Megalodon Calibration Procedures I feel it is important to ask questions about Meg calibration, and to know if its easy to screw it up. thats all I have in mind here. I would hope that we put peoples safety above our own personal pride in gear choices - unfortunately based on the pms Ive been recieving people just dont do that. They dont want to discuss in public some stuff. We cant have an honest open unbiased discussion about Rbs on other non Rebreather forums - surely we can have one here. __________________ Cave diving is a sport Wreck diving is a sport Diving in general is a sport 'Rebreather diving' is not a sport its the delusional obsession with a highly dangerous and often inappropriate piece of equipment Last edited by ROB DAVIE : 7th April 2006 at 03:38.
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6th April 2006, 11:48	#12 (permalink)
DonalWalsh Third Class Snorkeller Current Rebreather/s: Megalodon Other Rebreather/s: Evolution Join Date: Nov 2005 Location: Moving to London in Sept.....which way to the South Coast?? Posts: 133	Megalodon Calibration Procedures The way I see it the discussion might have identified a source of error with my cal that I might improve on .......doesn't conclude anything about what may have happened to anyone else, but useful none the less. Last edited by ROB DAVIE : 7th April 2006 at 03:39. Reason: References previously removed post...
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6th April 2006, 11:49	#13 (permalink)
*schford* RBW Founder Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: UK Posts: 3,564	Megalodon Calibration Procedures Quote: (Originally Posted by Drmike) No thats not what is happening and I resent the suggestion Im asking questions about Meg calibration and if its easy to screw it up thats all - Sorry Mike - I didn't mean to imply anything but thats how it will be read....I guess I misread it first time around - I should know better. __________________ Bailout and Kit Management account for Murphy's Law The only bad question is one you did not ask and later wish you had. Use of RBW is subject to the Rebreather World Terms & Conditions of Use Last edited by ROB DAVIE : 7th April 2006 at 03:39.
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6th April 2006, 11:49	#14 (permalink)
rogeringebo Life starts at 100 Current Rebreather/s: Pelagian Other Rebreather/s: Megalodon Classic Kiss Pelagian Join Date: Sep 2005 Location: Stockholm Sweden Posts: 739	Megalodon Calibration Procedures I analyse the gas where I fill it (in the diveshop) When I callibrate at home I dont put a analyzer behind the head...can I still get this problem? I use the 2 blindplugs that comes with the rebreather...one I plug the top of the head with and that one has the hose and flowrestrictor...the other blindplug I hold blocking the bottom of the head (it has a hole in it) This is how I was taught to do it.....should I do it different? __________________ Life starts at 100 Last edited by ROB DAVIE : 7th April 2006 at 03:40.
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6th April 2006, 11:50	#15 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,487	Megalodon Calibration Procedures Quote: (Originally Posted by schford) ... before we even find out what happened ... Will we ever know what happened ? Heart attack, again ? Do we know what happened on the other Meg fatalities this year yet ? Were they all heart attacks ? Should we remain silent and just wait for more fatalities ? I know I will get flamed, but unless I remember wrong, there are more fatalities in one year period involving Meg divers than any other units so far. What IS wrong ? Or only divers with heart-condition attracted to the Meg ? Last edited by ROB DAVIE : 7th April 2006 at 03:40.
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6th April 2006, 11:54	#16 (permalink)
JonnyB Johnny The Hatch Current Rebreather/s: MK 15.X Titan Other CCR Other SCR Home Build Other Rebreather/s: Not Bought Yet Inspiration Classic Megalodon Sport Kiss Classic Kiss Other CCR Other SCR Home Build Join Date: Jan 2005 Location: Sweden (Stockholm)/Cyprus(Ayia Napa) Posts: 991	Megalodon Calibration Procedures Quote: (Originally Posted by decoweenie) Will we ever know what happened ? Heart attack, again ? Do we know what happened on the other Meg fatalities this year yet ? Were they all heart attacks ? Should we remain silent and just wait for more fatalities ? I know I will get flamed, but unless I remember wrong, there are more fatalities in one year period involving Meg divers than any other units so far. What IS wrong ? Or only divers with heart-condition attracted to the Meg ? I know there were quite a few ftalities on the Meg last year(2005), but to my knowledge this is the first one so far in 2006, or am i wrong? /Jonny __________________ A quote from Crazyduck - In remembering our own Rob Davies. "Outbound flight 777 heavy you are cleared for flight Due west into that warm red Texas sunset You have angels on your wings and divers memories on your six." Rest In Peace http://www.divetekcyprus.com http://www.diveccr.com Last edited by ROB DAVIE : 7th April 2006 at 03:40.
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6th April 2006, 11:55	#17 (permalink)
rogeringebo Life starts at 100 Current Rebreather/s: Pelagian Other Rebreather/s: Megalodon Classic Kiss Pelagian Join Date: Sep 2005 Location: Stockholm Sweden Posts: 739	Megalodon Calibration Procedures I agree...well said Decoweenie.... If the accident involved me or someone I know personally,I would like to help creating safer routines for all Rebreather divers......period.... But I also understand the sensitive nature of the matter but think its not a good enough reason not to talk about the problems... Just my 5 cents __________________ Life starts at 100 Last edited by ROB DAVIE : 7th April 2006 at 03:41.
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6th April 2006, 12:16	#18 (permalink)
*jradomski* Moderator Current Rebreather/s: Inspiration Classic Sport Kiss Optima rEvo Other CCR Other Rebreather/s: Inspiration Vision Evolution Megalodon Classic Kiss rEvo Other CCR Join Date: Mar 2005 Location: "Da" Bronx Posts: 3,113	Megalodon Calibration Procedures Quote: (Originally Posted by DonalWalsh) Thanks Joe thats very informative especially for the less technical among us. If I understand you correctly we'd be best connecting the cal kit (for the o2 part of calibration) as usual but leaving thethe analyser end free, flowing o2 throught the head for a few minutes until the cells stablise and THEN connect the analyser ? no connect the analyzer to monitor the progress, once it reaches the proper reading DISCONNECT it then calibrate. __________________ Joe Radomski CCR Trimix Instructor Trainer ANDI Instructor Trainer Director #10 All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated. Last edited by ROB DAVIE : 7th April 2006 at 03:41.
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6th April 2006, 12:20	#19 (permalink)
Drmike RBW Member Current Rebreather/s: MK 15.X Ouroboros Other CCR Home Build Other Rebreather/s: Inspiration Classic Other CCR Home Build Join Date: Feb 2005 Posts: 3,378	Megalodon Calibration Procedures Do all Meg users use the same calibration method/kit? __________________ Cave diving is a sport Wreck diving is a sport Diving in general is a sport 'Rebreather diving' is not a sport its the delusional obsession with a highly dangerous and often inappropriate piece of equipment Last edited by ROB DAVIE : 7th April 2006 at 03:42.
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6th April 2006, 12:24	#20 (permalink)
*jradomski* Moderator Current Rebreather/s: Inspiration Classic Sport Kiss Optima rEvo Other CCR Other Rebreather/s: Inspiration Vision Evolution Megalodon Classic Kiss rEvo Other CCR Join Date: Mar 2005 Location: "Da" Bronx Posts: 3,113	Megalodon Calibration Procedures Quote: (Originally Posted by rogeringebo) I analyse the gas where I fill it (in the diveshop) When I callibrate at home I dont put a analyzer behind the head...can I still get this problem? I use the 2 blindplugs that comes with the rebreather...one I plug the top of the head with and that one has the hose and flowrestrictor...the other blindplug I hold blocking the bottom of the head (it has a hole in it) This is how I was taught to do it.....should I do it different? How do you know when the loop is perfectly flushed with oxygen?? You should always use an analyzer if possible to verify the gas comming out is as it was analyzed, once you know this its time to calibrate just make sure there is a free path for the gas.. ideally the diameter of any opening should be as large (or larger) as the tube feeding the oxygen in.. The sampling end of most analyzers have a very small opening so this creates back presure.. for the meg the best place is to feed the oxygen in (with the head off) down the center opening, and put a plug in the bottom opening (what goes into the scrubber) - hook the meter here, then once its stable, remove the meter and let gas flow unrestricted.. __________________ Joe Radomski CCR Trimix Instructor Trainer ANDI Instructor Trainer Director #10 All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated. Last edited by ROB DAVIE : 7th April 2006 at 03:42.
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