Meg Electronics

Ken · 16th May 2005, 10:47

Great info everyone. Let's say that for some reason I penetrate a wreck and hack off the cable to the Shearwater primary display.

Are the HUD brains controlling the PO2 (it looks like it from the photos)? Additionally, is the cable permeated with some type of water resistant potting material? I know I am nit-picking, but sometime soon I have to get off the fence and decide whether to go back to computers or stick with my Wet notes / hard table regimen.

Wet Notes are great, but flipping pages in a nasty current is a pain.

***schford*** · 16th May 2005, 11:27

Hi Ken,

If you manage to break the cable to your shearwater electronics, then computer 1 which is the shearwater will still be running and will fire the solenoid to maintain you last set point. You will not be able to change this set point any more as obviously the shearwater handset would have done this!

Computer no 2 is totally indpendant to no1 and only controls the HUD - the HUD monitors your PPO2 across all 3 cells but would not fire the solenoid - so you would need to fly the unit manually using the o2 manual add button if you wanted to increase your set point.

All the cables on the Meg are made of some special and very expensive material that stop water travelling along them..(no idea what Im a nerd not a techie ;-) )

Stuart

Ken · 16th May 2005, 23:23

Quote: (Originally Posted by schford)

Hi Ken,

If you manage to break the cable to your shearwater electronics, then computer 1 which is the shearwater will still be running and will fire the solenoid to maintain you last set point. You will not be able to change this set point any more as obviously the shearwater handset would have done this!

Computer no 2 is totally indpendant to no1 and only controls the HUD - the HUD monitors your PPO2 across all 3 cells but would not fire the solenoid - so you would need to fly the unit manually using the o2 manual add button if you wanted to increase your set point.

All the cables on the Meg are made of some special and very expensive material that stop water travelling along them..(no idea what Im a nerd not a techie ;-) )

Stuart

Hi Stuart,

Thank you. Your info. has answered my question. It seems that in the worst case scenario a Meg Shearwater user has enough info. and electronic assistance to get out in reasonable condition. I know Kevin Juergensen uses this special cable material.
http://www.rebreather.us/Hammerhead/Hammerhead.htm This cable looks similar (from afar) to Meg cabling? Cheers. Ken

16th May 2005, 10:47	#11 (permalink)
Ken Member Current Rebreather/s: Inspiration Classic Megalodon Classic Kiss Other Rebreather/s: Join Date: Mar 2005 Location: New York City Posts: 320	Great info everyone. Let's say that for some reason I penetrate a wreck and hack off the cable to the Shearwater primary display. Are the HUD brains controlling the PO2 (it looks like it from the photos)? Additionally, is the cable permeated with some type of water resistant potting material? I know I am nit-picking, but sometime soon I have to get off the fence and decide whether to go back to computers or stick with my Wet notes / hard table regimen. Wet Notes are great, but flipping pages in a nasty current is a pain.
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16th May 2005, 11:27	#12 (permalink)
*schford* Despotic Overlord Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: London, UK Posts: 3,660	Hi Ken, If you manage to break the cable to your shearwater electronics, then computer 1 which is the shearwater will still be running and will fire the solenoid to maintain you last set point. You will not be able to change this set point any more as obviously the shearwater handset would have done this! Computer no 2 is totally indpendant to no1 and only controls the HUD - the HUD monitors your PPO2 across all 3 cells but would not fire the solenoid - so you would need to fly the unit manually using the o2 manual add button if you wanted to increase your set point. All the cables on the Meg are made of some special and very expensive material that stop water travelling along them..(no idea what Im a nerd not a techie ;-) ) Stuart
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16th May 2005, 23:23	#13 (permalink)
Ken Member Current Rebreather/s: Inspiration Classic Megalodon Classic Kiss Other Rebreather/s: Join Date: Mar 2005 Location: New York City Posts: 320	Quote: (Originally Posted by schford) Hi Ken, If you manage to break the cable to your shearwater electronics, then computer 1 which is the shearwater will still be running and will fire the solenoid to maintain you last set point. You will not be able to change this set point any more as obviously the shearwater handset would have done this! Computer no 2 is totally indpendant to no1 and only controls the HUD - the HUD monitors your PPO2 across all 3 cells but would not fire the solenoid - so you would need to fly the unit manually using the o2 manual add button if you wanted to increase your set point. All the cables on the Meg are made of some special and very expensive material that stop water travelling along them..(no idea what Im a nerd not a techie ;-) ) Stuart Hi Stuart, Thank you. Your info. has answered my question. It seems that in the worst case scenario a Meg Shearwater user has enough info. and electronic assistance to get out in reasonable condition. I know Kevin Juergensen uses this special cable material. http://www.rebreather.us/Hammerhead/Hammerhead.htm This cable looks similar (from afar) to Meg cabling? Cheers. Ken
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