Meg 4th cell

Jeff Keep · 16th July 2006, 23:16

Hi,

Has anybody attached a 4th cell holder to their meg?
Any Ideas on how to do this.

Regards,

Jeff

RonMicjan · 17th July 2006, 01:41

its pretty rare to do this, primarly because its not needed. the MEG holds a very accurate setpoint, so one only needs to set your favorite dive computer on the same setpoint and dive away. Tests have shown that a real time plugged in computer will track deco within seconds of projected deco.

If you must add in an additional "failure point", then its entirely permissable to piggyback your dive computer in parallel to one of the three existing sensors with the proper port plug through the head bulkhead. but why waste time and money and chance getting salty water into your computers port?

***jradomski*** · 17th July 2006, 02:28

Quote: (Originally Posted by Jeff Keep)

Hi,

Has anybody attached a 4th cell holder to their meg?
Any Ideas on how to do this.

Regards,

Jeff

Why not get another cuonterlung from ISC with an ADV port and adv, and modify the ADV to hold a cell instead..

then yu just have to decide if you want the real ADV on the nhale or exhale counterlung and whch lung you want he cell "holder" on..

Peronally I would prefer the cell holder on the Inhale lung.

You can also get a port plug for th adv incase you cant use the cel holder.

rogeringebo · 17th July 2006, 04:24

Do you have any pics of this modyfied ADV-holder?
Cheers Rodge

***jradomski*** · 17th July 2006, 04:59

Quote: (Originally Posted by rogeringebo)

Do you have any pics of this modyfied ADV-holder?
Cheers Rodge

sorry I do not, but when I was up in centralia in feb, one of the guys there did one.. he basically just made the internal hole on the face of the adv larger to incorporate a k1d, and used a cable threaded to the adv gas supply port..

decoweenie · 17th July 2006, 06:14

Quote: (Originally Posted by RonMicjan)

...the MEG holds a very accurate setpoint...

This is not a troll, honestly.

IMHO, the biggest rumor I have heard floating around the Meg for a year now is it doesn't hold very good SP, so I am curious to see if there is "proof" from either side.

MikeH · 17th July 2006, 14:29

Quote: (Originally Posted by decoweenie)

This is not a troll, honestly.

IMHO, the biggest rumor I have heard floating around the Meg for a year now is it doesn't hold very good SP, so I am curious to see if there is "proof" from either side.

I think it depends on the electronics and type of solenoid. Mine will hold a setpoint well if I stay at the exact same depth(Apecs 2.01 and Loc-Tite solenoid). When in a cave and have some up and down, or during most wreck dives when I'm not at a constant depth, it doesn't hold it well at all. The Meg is my only rebreather experience(aside from a couple of short try dives), so I can't compare it to others....but I don't think any unit will hold PO2 very well when you have a lot of up and down in a short time. I fly mine manually almost all the time...but I do occasionally let the solenoid do the work when hanging on deco in calm water, mostly out of sheer boredom and trying to entertain myself.

Mike

RonMicjan · 17th July 2006, 16:40

the proof would be in having one computer plugged in, and the other not, and having the deco come out the same. ISC has data from testing showing return to setpoint well within CE standard.

***jradomski*** · 17th July 2006, 18:17

Quote: (Originally Posted by RonMicjan)

the proof would be in having one computer plugged in, and the other not, and having the deco come out the same. ISC has data from testing showing return to setpoint well within CE standard.

The CE standard is really a poor measure here.. It allows a deviation of 0.5bar and a full 1 minute to recover..

That is also on normal ascents not even a fast one...

RonMicjan · 17th July 2006, 18:52

Quote: (Originally Posted by jradomski)

The CE standard is really a poor measure here.. It allows a deviation of 0.5bar and a full 1 minute to recover..

That is also on normal ascents not even a fast one...

wow, a whole minute! what part of "well within" did you not read? What part of no difference in deco did you miss? Dont you have some burger patties to make?

16th July 2006, 23:16	#1 (permalink)
Jeff Keep New Member Current Rebreather/s: Inspiration Classic Evolution Megalodon Other Rebreather/s: Join Date: Apr 2006 Location: Manchester UK Posts: 5	Meg 4th cell Hi, Has anybody attached a 4th cell holder to their meg? Any Ideas on how to do this. Regards, Jeff __________________ ____________________________________________ Jeff Keep IANTD Technical & Rebreather Inst # 3764 New Frontier Diving Ltd 0161-256-1598 or 07800-911538 www.newfrontierdiving.com
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17th July 2006, 01:41	#2 (permalink)
RonMicjan Cap Ron scourge of the NW Current Rebreather/s: Megalodon Dolphin Home Build Other Rebreather/s: Sport Kiss Classic Kiss Dolphin Home Build Join Date: Feb 2005 Location: Cape Disapointment, The Graveyard of the Pacific Posts: 1,119	Re: Meg 4th cell its pretty rare to do this, primarly because its not needed. the MEG holds a very accurate setpoint, so one only needs to set your favorite dive computer on the same setpoint and dive away. Tests have shown that a real time plugged in computer will track deco within seconds of projected deco. If you must add in an additional "failure point", then its entirely permissable to piggyback your dive computer in parallel to one of the three existing sensors with the proper port plug through the head bulkhead. but why waste time and money and chance getting salty water into your computers port? __________________ Marine rescue, towing and salvage. Interfering with natural selection since 1983. www.tmishop.com Diving bits etc. www.seatowpdx.com The Summer Job
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17th July 2006, 02:28	#3 (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	Re: Meg 4th cell Quote: (Originally Posted by Jeff Keep) Hi, Has anybody attached a 4th cell holder to their meg? Any Ideas on how to do this. Regards, Jeff Why not get another cuonterlung from ISC with an ADV port and adv, and modify the ADV to hold a cell instead.. then yu just have to decide if you want the real ADV on the nhale or exhale counterlung and whch lung you want he cell "holder" on.. Peronally I would prefer the cell holder on the Inhale lung. You can also get a port plug for th adv incase you cant use the cel holder. __________________ 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.
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17th July 2006, 04:24	#4 (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	Re: Meg 4th cell Do you have any pics of this modyfied ADV-holder? Cheers Rodge __________________ Life starts at 100
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17th July 2006, 04:59	#5 (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	Re: Meg 4th cell Quote: (Originally Posted by rogeringebo) Do you have any pics of this modyfied ADV-holder? Cheers Rodge sorry I do not, but when I was up in centralia in feb, one of the guys there did one.. he basically just made the internal hole on the face of the adv larger to incorporate a k1d, and used a cable threaded to the adv gas supply port.. __________________ 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.
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17th July 2006, 06:14	#6 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,487	Re: Meg 4th cell Quote: (Originally Posted by RonMicjan) ...the MEG holds a very accurate setpoint... This is not a troll, honestly. IMHO, the biggest rumor I have heard floating around the Meg for a year now is it doesn't hold very good SP, so I am curious to see if there is "proof" from either side. __________________ "...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..." - Rebreather World PM
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17th July 2006, 14:29	#7 (permalink)
MikeH Custom Title Allowed! Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Aug 2005 Location: Orlando, FL USA Posts: 178	Re: Meg 4th cell Quote: (Originally Posted by decoweenie) This is not a troll, honestly. IMHO, the biggest rumor I have heard floating around the Meg for a year now is it doesn't hold very good SP, so I am curious to see if there is "proof" from either side. I think it depends on the electronics and type of solenoid. Mine will hold a setpoint well if I stay at the exact same depth(Apecs 2.01 and Loc-Tite solenoid). When in a cave and have some up and down, or during most wreck dives when I'm not at a constant depth, it doesn't hold it well at all. The Meg is my only rebreather experience(aside from a couple of short try dives), so I can't compare it to others....but I don't think any unit will hold PO2 very well when you have a lot of up and down in a short time. I fly mine manually almost all the time...but I do occasionally let the solenoid do the work when hanging on deco in calm water, mostly out of sheer boredom and trying to entertain myself. Mike
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17th July 2006, 16:40	#8 (permalink)
RonMicjan Cap Ron scourge of the NW Current Rebreather/s: Megalodon Dolphin Home Build Other Rebreather/s: Sport Kiss Classic Kiss Dolphin Home Build Join Date: Feb 2005 Location: Cape Disapointment, The Graveyard of the Pacific Posts: 1,119	Re: Meg 4th cell the proof would be in having one computer plugged in, and the other not, and having the deco come out the same. ISC has data from testing showing return to setpoint well within CE standard. __________________ Marine rescue, towing and salvage. Interfering with natural selection since 1983. www.tmishop.com Diving bits etc. www.seatowpdx.com The Summer Job
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17th July 2006, 18:17	#9 (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	Re: Meg 4th cell Quote: (Originally Posted by RonMicjan) the proof would be in having one computer plugged in, and the other not, and having the deco come out the same. ISC has data from testing showing return to setpoint well within CE standard. The CE standard is really a poor measure here.. It allows a deviation of 0.5bar and a full 1 minute to recover.. That is also on normal ascents not even a fast one... __________________ 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.
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17th July 2006, 18:52	#10 (permalink)
RonMicjan Cap Ron scourge of the NW Current Rebreather/s: Megalodon Dolphin Home Build Other Rebreather/s: Sport Kiss Classic Kiss Dolphin Home Build Join Date: Feb 2005 Location: Cape Disapointment, The Graveyard of the Pacific Posts: 1,119	Re: Meg 4th cell Quote: (Originally Posted by jradomski) The CE standard is really a poor measure here.. It allows a deviation of 0.5bar and a full 1 minute to recover.. That is also on normal ascents not even a fast one... wow, a whole minute! what part of "well within" did you not read? What part of no difference in deco did you miss? Dont you have some burger patties to make? __________________ Marine rescue, towing and salvage. Interfering with natural selection since 1983. www.tmishop.com Diving bits etc. www.seatowpdx.com The Summer Job
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