Evo OTU Alarm Setting

Larky · 20th November 2005, 10:41

Hello all,

Not sure if this has been talked about on this forum? if so sorry.

I was having an online discussion with Martin Parker and Tom Mount recently, regarding the OTU alarm, which cuts in at 80% on the Evo. With a hell of a lot of noise and flashing lights and which only seems to be suppressable once.

Martin said it would be an easy matter to change the software to activate the alarm at 100% and asked my opinion. I immediately admitted my inability to make a qualified comment and passed the question on to Tom, who said moving the alarm to 100% would be a good idea.

I know there can be some long term bad effects from extended overexposure to Oxygen but a warning at 100%, perhaps suppressable altogether, may be a good thing?

I am just a newbie but if Tom says it will not be a problem, I tend to believe him.

IMHO this kind of feedback from actual users is probably the best way to let Martin know what he can do to improve on his already very user friendly machine.

Opinions anyone?

Larky

decoweenie · 20th November 2005, 11:08

Are you talking about CNS or OTU ?

Larky · 20th November 2005, 16:54

Quote: (Originally Posted by decoweenie)

Are you talking about CNS or OTU ?

Sorry, CNS warning alarm, triggered by the accumulation of OTU`s. Closely followed by very annoying beeps and flashing lights...

decoweenie · 20th November 2005, 17:29

Quote: (Originally Posted by Larky)

...CNS warning alarm, triggered by the accumulation of OTU`s...

CNS and OTU are 2 different things AFAIK.

A lot of people referred to CNS as "Oxygen Crock" instead of Oxygen Clock.

OTU limit is difficult to achieved unless you do high PO2 dives on combination multi-dives and multi-days.

Did you manage to get to 80% of the OTU or CNS as written on your first post ? I could believe CNS, but not OTU.

PeteS · 20th November 2005, 18:51

Quote: (Originally Posted by Larky)

I was having an online discussion with Martin Parker and Tom Mount recently, regarding the OTU alarm, which cuts in at 80% on the Evo. With a hell of a lot of noise and flashing lights and which only seems to be suppressable once.

I think that all alarms should be suppressable. An alarm that is beeping away only suceeds in pissing you off, and masking new alarm states from the user.

Larky · 20th November 2005, 19:11

Quote: (Originally Posted by decoweenie)

CNS and OTU are 2 different things AFAIK.

A lot of people referred to CNS as "Oxygen Crock" instead of Oxygen Clock.

OTU limit is difficult to achieved unless you do high PO2 dives on combination multi-dives and multi-days.

Did you manage to get to 80% of the OTU or CNS as written on your first post ? I could believe CNS, but not OTU.

You are correct.

After roughly three to three and a half hours of repetative daily dive time at 60-80 feet, using a PO2 of 1.3, the machine registers a CNS level of 80% and triggers the alarm.

I am suggesting it may be a good thing to change that alarm to 100% and possibly also make it suppressable?

decoweenie · 20th November 2005, 19:21

Quote: (Originally Posted by Larky)

I am suggesting it may be a good thing to change that alarm to 100% and possibly also make it suppressable?

Definitely!

It might be even better if it is user-definable as far as the alarm level. And allows the value range to be 100%+.

If not, at least user-suppressable as you and Peter mentioned.

***jradomski*** · 21st November 2005, 02:34

Quote: (Originally Posted by Larky)

You are correct.

After roughly three to three and a half hours of repetative daily dive time at 60-80 feet, using a PO2 of 1.3, the machine registers a CNS level of 80% and triggers the alarm.

I am suggesting it may be a good thing to change that alarm to 100% and possibly also make it suppressable?

I couldn;t agree more.. the CNS alarm should be supressable..

I don't see a problme with ONE notification telling you that your broke the limit, but then once its acknowledged it should be able to be disabled..

A majority of the time if you are breaking these limits you are doing it by choice..

I know I personally have done dives where I was several times the CNS limits.. After on dive of being annoyed continually that would have me looking for alternate gear..

I know when I do big dives my average CNS is somewhere between $125% and 150%

cedricverdier · 21st November 2005, 08:11

Quote: (Originally Posted by decoweenie)

Definitely!

It might be even better if it is user-definable as far as the alarm level. And allows the value range to be 100%+.

If not, at least user-suppressable as you and Peter mentioned.

I definitely agree with you. The CNS Alarm is sometimes a PITA with the Vision electronics. It could be great to be able to change the value...

Cheers

01RMB · 27th November 2005, 11:50

I've just come back from the Java Sea using the Evo and did a bit over a week of 60-70m diving. The unit was great but both the CNS and OTU alarms become a PITA.

The CNS alarm comes on when at a PPO2 of 1.3, 80% of 3 1/2 hours per day is reached ie. after only 168 minutes of diving in a day .

The Vision computer uses the long term average (11 day plus) of 300 OTUs per day as the limit and the OTU alarm comes on when 80% of 300 OTUs is reached ie. after 240 OTUs or 162 minutes at a PPO2 of 1.3.

When doing a couple of deep deco dives a day both the CNS and the OTU limits are exceeded on the second dive of the day.

Both alarms are suppressible but they become very annoying during the deco hang requiring you to keep shutting them down every 5 minutes. You can suppress them every time they come up until 100% is reached.

I for one would also like to see the alarm levels adjustable. It would make the alarms a lot less frequent and less annoying for everyone at the end of a second longish (1 1/2 - 2 hour) deco dive in a day.

Cheers
Rod

20th November 2005, 10:41	#1 (permalink)
Larky New Member Current Rebreather/s: Evolution Other Rebreather/s: Join Date: Aug 2005 Location: Fortaleza, Brazil Posts: 19	Evo OTU Alarm Setting Hello all, Not sure if this has been talked about on this forum? if so sorry. I was having an online discussion with Martin Parker and Tom Mount recently, regarding the OTU alarm, which cuts in at 80% on the Evo. With a hell of a lot of noise and flashing lights and which only seems to be suppressable once. Martin said it would be an easy matter to change the software to activate the alarm at 100% and asked my opinion. I immediately admitted my inability to make a qualified comment and passed the question on to Tom, who said moving the alarm to 100% would be a good idea. I know there can be some long term bad effects from extended overexposure to Oxygen but a warning at 100%, perhaps suppressable altogether, may be a good thing? I am just a newbie but if Tom says it will not be a problem, I tend to believe him. IMHO this kind of feedback from actual users is probably the best way to let Martin know what he can do to improve on his already very user friendly machine. Opinions anyone? Larky __________________ There are people who think that everything one does with a serious face is sensible... Georg Christoph Lichtenberg
(Offline)

20th November 2005, 11:08	#2 (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: Evo OTU Alarm Setting Are you talking about CNS or OTU ? __________________ "...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
(Offline)

20th November 2005, 16:54	#3 (permalink)
Larky New Member Current Rebreather/s: Evolution Other Rebreather/s: Join Date: Aug 2005 Location: Fortaleza, Brazil Posts: 19	Re: Evo OTU Alarm Setting Quote: (Originally Posted by decoweenie) Are you talking about CNS or OTU ? Sorry, CNS warning alarm, triggered by the accumulation of OTU`s. Closely followed by very annoying beeps and flashing lights... __________________ There are people who think that everything one does with a serious face is sensible... Georg Christoph Lichtenberg
(Offline)

20th November 2005, 17:29	#4 (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: Evo OTU Alarm Setting Quote: (Originally Posted by Larky) ...CNS warning alarm, triggered by the accumulation of OTU`s... CNS and OTU are 2 different things AFAIK. A lot of people referred to CNS as "Oxygen Crock" instead of Oxygen Clock. OTU limit is difficult to achieved unless you do high PO2 dives on combination multi-dives and multi-days. Did you manage to get to 80% of the OTU or CNS as written on your first post ? I could believe CNS, but not OTU. __________________ "...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
(Offline)

20th November 2005, 18:51	#5 (permalink)
PeteS Consent Issued! Current Rebreather/s: Inspiration Classic Inspiration Vision Other Rebreather/s: Join Date: Jun 2005 Location: New Zealand Posts: 539	Re: Evo OTU Alarm Setting Quote: (Originally Posted by Larky) I was having an online discussion with Martin Parker and Tom Mount recently, regarding the OTU alarm, which cuts in at 80% on the Evo. With a hell of a lot of noise and flashing lights and which only seems to be suppressable once. I think that all alarms should be suppressable. An alarm that is beeping away only suceeds in pissing you off, and masking new alarm states from the user. __________________ Pete S. http://www.steggle.co.nz Every silver lining has a cloud
(Offline)

20th November 2005, 19:11	#6 (permalink)
Larky New Member Current Rebreather/s: Evolution Other Rebreather/s: Join Date: Aug 2005 Location: Fortaleza, Brazil Posts: 19	Re: Evo OTU Alarm Setting Quote: (Originally Posted by decoweenie) CNS and OTU are 2 different things AFAIK. A lot of people referred to CNS as "Oxygen Crock" instead of Oxygen Clock. OTU limit is difficult to achieved unless you do high PO2 dives on combination multi-dives and multi-days. Did you manage to get to 80% of the OTU or CNS as written on your first post ? I could believe CNS, but not OTU. You are correct. After roughly three to three and a half hours of repetative daily dive time at 60-80 feet, using a PO2 of 1.3, the machine registers a CNS level of 80% and triggers the alarm. I am suggesting it may be a good thing to change that alarm to 100% and possibly also make it suppressable? __________________ There are people who think that everything one does with a serious face is sensible... Georg Christoph Lichtenberg
(Offline)

20th November 2005, 19:21	#7 (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: Evo OTU Alarm Setting Quote: (Originally Posted by Larky) I am suggesting it may be a good thing to change that alarm to 100% and possibly also make it suppressable? Definitely! It might be even better if it is user-definable as far as the alarm level. And allows the value range to be 100%+. If not, at least user-suppressable as you and Peter mentioned. __________________ "...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
(Offline)

21st November 2005, 02:34	#8 (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: 3,095	Re: Evo OTU Alarm Setting Quote: (Originally Posted by Larky) You are correct. After roughly three to three and a half hours of repetative daily dive time at 60-80 feet, using a PO2 of 1.3, the machine registers a CNS level of 80% and triggers the alarm. I am suggesting it may be a good thing to change that alarm to 100% and possibly also make it suppressable? I couldn;t agree more.. the CNS alarm should be supressable.. I don't see a problme with ONE notification telling you that your broke the limit, but then once its acknowledged it should be able to be disabled.. A majority of the time if you are breaking these limits you are doing it by choice.. I know I personally have done dives where I was several times the CNS limits.. After on dive of being annoyed continually that would have me looking for alternate gear.. I know when I do big dives my average CNS is somewhere between $125% and 150% __________________ 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.
(Offline)

21st November 2005, 08:11	#9 (permalink)
cedricverdier S21 M.I.B. Current Rebreather/s: Evolution Megalodon Other Rebreather/s: Not Bought Yet Inspiration Classic Inspiration Vision Sport Kiss Classic Kiss Join Date: Apr 2005 Location: Worldwide! Posts: 498	Re: Evo OTU Alarm Setting Quote: (Originally Posted by decoweenie) Definitely! It might be even better if it is user-definable as far as the alarm level. And allows the value range to be 100%+. If not, at least user-suppressable as you and Peter mentioned. I definitely agree with you. The CNS Alarm is sometimes a PITA with the Vision electronics. It could be great to be able to change the value... Cheers __________________ Cedric Verdier PADI Course Director, ANDI-IANTD-PSAI-TDI-DSAT-DAN-NAUI-CMAS Instructor Trainer Trimix (CCR and OC) and Cave Diving Instructor Trainer www.CedricVerdier.com DIRrebreather member
(Offline)

27th November 2005, 11:50	#10 (permalink)
01RMB Evolving Current Rebreather/s: Evolution Other Rebreather/s: Join Date: May 2005 Location: Brisbane, Australia Posts: 193	Re: Evo OTU Alarm Setting I've just come back from the Java Sea using the Evo and did a bit over a week of 60-70m diving. The unit was great but both the CNS and OTU alarms become a PITA. The CNS alarm comes on when at a PPO2 of 1.3, 80% of 3 1/2 hours per day is reached ie. after only 168 minutes of diving in a day . The Vision computer uses the long term average (11 day plus) of 300 OTUs per day as the limit and the OTU alarm comes on when 80% of 300 OTUs is reached ie. after 240 OTUs or 162 minutes at a PPO2 of 1.3. When doing a couple of deep deco dives a day both the CNS and the OTU limits are exceeded on the second dive of the day. Both alarms are suppressible but they become very annoying during the deco hang requiring you to keep shutting them down every 5 minutes. You can suppress them every time they come up until 100% is reached. I for one would also like to see the alarm levels adjustable. It would make the alarms a lot less frequent and less annoying for everyone at the end of a second longish (1 1/2 - 2 hour) deco dive in a day. Cheers Rod
(Offline)

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