Turning 4th cell OFF in a 2pin VR£ - impossible??!

Mdemon · 27th June 2006, 12:05

I have the 4th cell as a backup, in case the handsets give up mid-dive. I don't want the deco calculated because the cells have only once agreed with each other close enough for comfort.

The software is v2. I have the External PO2 switched off on the VR£, BUT!

...I was sent the manual for v2 by DeltaP the other day and in it it says that if the External PO2 is Off but the PO2 is HIGHER than the set point, it uses the 4th cell to calculate deco!!!!!

Can anyone think of a way I can get round this please? I just need 4th cell I can switch on in emergencies...

***Beanie*** · 27th June 2006, 12:46

Quote: (Originally Posted by Mdemon)

...I was sent the manual for v2 by DeltaP the other day and in it it says that if the External PO2 is Off but the PO2 is HIGHER than the set point, it uses the 4th cell to calculate deco!!!!!

hmmm yes it does I have a v2 manual but have a v3 VR£ I read that and passed it over becasue the VR£ did have two options ex cell on and ex cell deco.

What does the v3 manual say?

Mdemon · 27th June 2006, 14:19

IIRC, you can turn it off in v3. Glad I checked for v2 though, which is the version in my VR£. Scarey, because the higher PO2 was part of my conservatism...

Mark Chase · 27th June 2006, 15:08

Quote: (Originally Posted by Mdemon)

IIRC, you can turn it off in v3. Glad I checked for v2 though, which is the version in my VR£. Scarey, because the higher PO2 was part of my conservatism...

If its an issue unplug it.

You can always clean the connections after. I know its not a major problem as my one came unplugged by accident after being suppled with a dodgy Fisher connector that didn't lock on.

ATB

Mark Chase

Mdemon · 27th June 2006, 15:35

Quote: (Originally Posted by Mark Chase)

If its an issue unplug it.

You can always clean the connections after. I know its not a major problem as my one came unplugged by accident after being suppled with a dodgy Fisher connector that didn't lock on.

ATB

Mark Chase

Hmmm... I could, but it would be better the other way round. Plug it in when I need it... However, I don't know if this will work, whether it might damage things, whether the sea water will affect the connection or the reading...

Or ramp up the conservatism, but I'm already on 20%. I wouldn't be getting out until next week...

Do they have this problem with the Explorer?

***Beanie*** · 27th June 2006, 15:45

Quote: (Originally Posted by Mdemon)

Hmmm... I could, but it would be better the other way round. Plug it in when I need it... However, I don't know if this will work, whether it might damage things, whether the sea water will affect the connection or the reading...

You can always add the end caps for the VR3 and cable

Mdemon · 27th June 2006, 16:09

Quote: (Originally Posted by Beanie)

You can always add the end caps for the VR3 and cable

Very shiney and very desireable, you born Salesman you!

Here's the scenario...
Diving along, minding my own business. Suddenly, there is a beep, a fut, and both handsets are dead. I need to know my PO2 for ascent. So, I remove both endcaps (thanks Beanie), plug the cable into VR£, turn on Ext PO2 and ride the single cell all the way home, rather than semi-closed or bailing.

Problems with this? How will the seawater affect the reading? Will it screw the previous calibration? Is this more effort than it's worth?!

***Beanie*** · 27th June 2006, 16:13

Quote: (Originally Posted by Mdemon)

Very shiney and very desireable, you born Salesman you!

Here's the scenario...
Diving along, minding my own business. Suddenly, there is a beep, a fut, and both handsets are dead. I need to know my PO2 for ascent. So, I remove both endcaps (thanks Beanie), plug the cable into VR£, turn on Ext PO2 and ride the single cell all the way home, rather than semi-closed or bailing.

Problems with this? How will the seawater affect the reading? Will it screw the previous calibration? Is this more effort than it's worth?!

I'm thinking silicon grease, put on both connectors then as you connect the two the act of connection clears the grease from the conductors and it works.

Well it could do, at least you can test this on dry land.

Mdemon · 27th June 2006, 16:32

Quote: (Originally Posted by Beanie)

I'm thinking silicon grease, put on both connectors then as you connect the two the act of connection clears the grease from the conductors and it works.

Well it could do, at least you can test this on dry land.

I'll have a play and see.

johnv · 27th June 2006, 17:01

Quote: (Originally Posted by Mdemon)

I'll have a play and see.

Don't bother! Exposing any electronics to salt water is a bad idea, if you need a 4th cell as a backup you want to know it's reliable, washing it in salt water just before you have to use it (and just after your primary has failed) is not a great idea. Try exposing a cheap torch first and watch what happens.

YMMV
John

27th June 2006, 12:05	#1 (permalink)
Mdemon SiegeEngine II Current Rebreather/s: Inspiration Classic Home Build Other Rebreather/s: Inspiration Classic Home Build Join Date: Feb 2007 Location: SWUK Posts: 1,946	Turning 4th cell OFF in a 2pin VR£ - impossible??! I have the 4th cell as a backup, in case the handsets give up mid-dive. I don't want the deco calculated because the cells have only once agreed with each other close enough for comfort. The software is v2. I have the External PO2 switched off on the VR£, BUT! ...I was sent the manual for v2 by DeltaP the other day and in it it says that if the External PO2 is Off but the PO2 is HIGHER than the set point, it uses the 4th cell to calculate deco!!!!! Can anyone think of a way I can get round this please? I just need 4th cell I can switch on in emergencies... __________________ www.southwestmafia.com "small minds talk about people, Average Minds Talk About Events, GREAT MINDS TALK ABOUT IDEAS!" The WRONG Attitude will get you killed. "Once the agenda-monkeys and perfect-worlders have moved on, perhaps we can do some diving?"
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27th June 2006, 12:46	#2 (permalink)
*Beanie* Gallery Administrator Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Vision Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,312	Re: Turning 4th cell OFF in a 2pin VR£ - impossible??! Quote: (Originally Posted by Mdemon) ...I was sent the manual for v2 by DeltaP the other day and in it it says that if the External PO2 is Off but the PO2 is HIGHER than the set point, it uses the 4th cell to calculate deco!!!!! hmmm yes it does I have a v2 manual but have a v3 VR£ I read that and passed it over becasue the VR£ did have two options ex cell on and ex cell deco. What does the v3 manual say? __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk www.beandiving.co.uk www.beanengineering.co.uk
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27th June 2006, 14:19	#3 (permalink)
Mdemon SiegeEngine II Current Rebreather/s: Inspiration Classic Home Build Other Rebreather/s: Inspiration Classic Home Build Join Date: Feb 2007 Location: SWUK Posts: 1,946	Re: Turning 4th cell OFF in a 2pin VR£ - impossible??! IIRC, you can turn it off in v3. Glad I checked for v2 though, which is the version in my VR£. Scarey, because the higher PO2 was part of my conservatism... __________________ www.southwestmafia.com "small minds talk about people, Average Minds Talk About Events, GREAT MINDS TALK ABOUT IDEAS!" The WRONG Attitude will get you killed. "Once the agenda-monkeys and perfect-worlders have moved on, perhaps we can do some diving?"
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27th June 2006, 15:08	#4 (permalink)
Mark Chase RBW Member Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Jan 2005 Location: Kent Posts: 2,863	Re: Turning 4th cell OFF in a 2pin VR£ - impossible??! Quote: (Originally Posted by Mdemon) IIRC, you can turn it off in v3. Glad I checked for v2 though, which is the version in my VR£. Scarey, because the higher PO2 was part of my conservatism... If its an issue unplug it. You can always clean the connections after. I know its not a major problem as my one came unplugged by accident after being suppled with a dodgy Fisher connector that didn't lock on. ATB Mark Chase __________________ See my "Doing It Chasey" video where I'm locked into a padded room, naked, with two ball bearings and within an Hour, I manage to lose one and break the other!!! Kevin Juergensen 16/11/08 [/quote]
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27th June 2006, 15:35	#5 (permalink)
Mdemon SiegeEngine II Current Rebreather/s: Inspiration Classic Home Build Other Rebreather/s: Inspiration Classic Home Build Join Date: Feb 2007 Location: SWUK Posts: 1,946	Re: Turning 4th cell OFF in a 2pin VR£ - impossible??! Quote: (Originally Posted by Mark Chase) If its an issue unplug it. You can always clean the connections after. I know its not a major problem as my one came unplugged by accident after being suppled with a dodgy Fisher connector that didn't lock on. ATB Mark Chase Hmmm... I could, but it would be better the other way round. Plug it in when I need it... However, I don't know if this will work, whether it might damage things, whether the sea water will affect the connection or the reading... Or ramp up the conservatism, but I'm already on 20%. I wouldn't be getting out until next week... Do they have this problem with the Explorer? __________________ www.southwestmafia.com "small minds talk about people, Average Minds Talk About Events, GREAT MINDS TALK ABOUT IDEAS!" The WRONG Attitude will get you killed. "Once the agenda-monkeys and perfect-worlders have moved on, perhaps we can do some diving?"
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27th June 2006, 15:45	#6 (permalink)
*Beanie* Gallery Administrator Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Vision Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,312	Re: Turning 4th cell OFF in a 2pin VR£ - impossible??! Quote: (Originally Posted by Mdemon) Hmmm... I could, but it would be better the other way round. Plug it in when I need it... However, I don't know if this will work, whether it might damage things, whether the sea water will affect the connection or the reading... You can always add the end caps for the VR3 and cable __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk www.beandiving.co.uk www.beanengineering.co.uk
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27th June 2006, 16:09	#7 (permalink)
Mdemon SiegeEngine II Current Rebreather/s: Inspiration Classic Home Build Other Rebreather/s: Inspiration Classic Home Build Join Date: Feb 2007 Location: SWUK Posts: 1,946	Re: Turning 4th cell OFF in a 2pin VR£ - impossible??! Quote: (Originally Posted by Beanie) You can always add the end caps for the VR3 and cable Very shiney and very desireable, you born Salesman you! Here's the scenario... Diving along, minding my own business. Suddenly, there is a beep, a fut, and both handsets are dead. I need to know my PO2 for ascent. So, I remove both endcaps (thanks Beanie), plug the cable into VR£, turn on Ext PO2 and ride the single cell all the way home, rather than semi-closed or bailing. Problems with this? How will the seawater affect the reading? Will it screw the previous calibration? Is this more effort than it's worth?! __________________ www.southwestmafia.com "small minds talk about people, Average Minds Talk About Events, GREAT MINDS TALK ABOUT IDEAS!" The WRONG Attitude will get you killed. "Once the agenda-monkeys and perfect-worlders have moved on, perhaps we can do some diving?"
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27th June 2006, 16:13	#8 (permalink)
*Beanie* Gallery Administrator Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Vision Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,312	Re: Turning 4th cell OFF in a 2pin VR£ - impossible??! Quote: (Originally Posted by Mdemon) Very shiney and very desireable, you born Salesman you! Here's the scenario... Diving along, minding my own business. Suddenly, there is a beep, a fut, and both handsets are dead. I need to know my PO2 for ascent. So, I remove both endcaps (thanks Beanie), plug the cable into VR£, turn on Ext PO2 and ride the single cell all the way home, rather than semi-closed or bailing. Problems with this? How will the seawater affect the reading? Will it screw the previous calibration? Is this more effort than it's worth?! I'm thinking silicon grease, put on both connectors then as you connect the two the act of connection clears the grease from the conductors and it works. Well it could do, at least you can test this on dry land. __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk www.beandiving.co.uk www.beanengineering.co.uk
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27th June 2006, 16:32	#9 (permalink)
Mdemon SiegeEngine II Current Rebreather/s: Inspiration Classic Home Build Other Rebreather/s: Inspiration Classic Home Build Join Date: Feb 2007 Location: SWUK Posts: 1,946	Re: Turning 4th cell OFF in a 2pin VR£ - impossible??! Quote: (Originally Posted by Beanie) I'm thinking silicon grease, put on both connectors then as you connect the two the act of connection clears the grease from the conductors and it works. Well it could do, at least you can test this on dry land. I'll have a play and see. __________________ www.southwestmafia.com "small minds talk about people, Average Minds Talk About Events, GREAT MINDS TALK ABOUT IDEAS!" The WRONG Attitude will get you killed. "Once the agenda-monkeys and perfect-worlders have moved on, perhaps we can do some diving?"
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27th June 2006, 17:01	#10 (permalink)
johnv RBW Member Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Dec 2005 Location: UK Posts: 163	Re: Turning 4th cell OFF in a 2pin VR£ - impossible??! Quote: (Originally Posted by Mdemon) I'll have a play and see. Don't bother! Exposing any electronics to salt water is a bad idea, if you need a 4th cell as a backup you want to know it's reliable, washing it in salt water just before you have to use it (and just after your primary has failed) is not a great idea. Try exposing a cheap torch first and watch what happens. YMMV John
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