Calibrating the night before?

Divejunkie · 30th December 2007, 11:07

Having done the crossover course from the Inspo, I still have lots of questions without a manual.

Is it was possible to calibrate the unit the night before the dive?

If both primary and secondary are set to power save and the hud is disabled, would there be any drain on the batteries?

Chris · 30th December 2007, 11:27

Huh ?? You don't have to leave it on after a Cal. Its no Ybod

I pretty much always Cal the Meg the night before, actually its 9:30pm and I just finished doing a Predive including Cal for a 10am splash tomorrow.
Usually our dives involve very early starts, thanks Luke

Last thing I would want to be doing is a Pre Dive at 5am in the morning.

Just Prep the Meg as per the checklist including Calibration then turn it off.

10 mins before getting in the water open the can turn it on, close it up do a positive and negative then go for the dive. Can't say I have ever had a cell drift overnight, usually spot on for weeks at a time.

Cheers
Chriso

**offpro** · 30th December 2007, 11:57

Quote: (Originally Posted by Divejunkie)

Is it was possible to calibrate the unit the night before the dive?

yes

the head only calibrating kit makes it easy...!

divingabe · 30th December 2007, 12:15

The answer is Yes to both question. If you are using Apecs Electronics there is a power drain whenever the units are left on whether asleep or not. To save on the batteries you should turn them both off and just turn them back on prior to diving. I always calibrate the day before diving and then check if I still have proper reading when I turn the units back on prior to diving and if they are too far off then I would recalibrate, but so far it has not happened.
As far as drain on the batteries, I have had a couple of senior moments and left the power on for a couple of days after cleaning the unit and playing with the controllers just to find out that I spent the batteries because even though they units are on the sleep mode they do still drain power.

Divejunkie · 30th December 2007, 12:48

Quote:

I always calibrate the day before diving and then check if I still have proper reading when I turn the units back on prior to diving and if they are too far off then I would recalibrate, but so far it has not happened.

By too far off do you mean the O2% reading on the handsets?

Chris · 30th December 2007, 13:11

Just out of curiosity who did your cross over

Cheers
Chriso

Divejunkie · 30th December 2007, 13:16

Quote: (Originally Posted by Chris)

Just out of curiosity who did you cross over

Cheers
Chriso

Dennis Vessey

***diverklondike*** · 30th December 2007, 13:22

Quote: (Originally Posted by Chris)

Just out of curiosity who did you cross over

Cheers
Chriso

Ditto on that question....

This is not a ding on you personally but it exactly goes to the importance of good cross over training....

Best of luck!

Mark

divingabe · 30th December 2007, 14:02

Yes I do mean the reading on the handsets. After calibration it will read 20.9 on air. The next morning it should read the same as when you calibrated and to be .1 off either way would not warrantee recalibrating unless you feel compelled to do so. My view is if it does show greater than .1 off I would then recalibrate.

Sorry for being unclear I meant it to be .001, as far as error differential. I use the ballpark of .211 - .208 therefore above .212 or below .207 I would recalibrate.

***jradomski*** · 30th December 2007, 14:13

Quote: (Originally Posted by divingabe)

Yes I do mean the reading on the handsets. After calibration it will read 20.9 on air. The next morning it should read the same as when you calibrated and to be .1 off either way would not warrantee recalibrating unless you feel compelled to do so. My view is if it does show greater than .1 off I would then recalibrate.

.1 is a HUGE error.. .3 when it should be .21 would not be acceptable..

.20-.23 would be in the ballpark.. but since the meg uses a 2pt cal and one is air.. I would really be looking for as close to a .21 as possible

30th December 2007, 11:07	#1 (permalink)
Divejunkie New Member Current Rebreather/s: Megalodon Other Rebreather/s: Inspiration Classic Join Date: Nov 2005 Location: Cumbria Posts: 29	Calibrating the night before? Having done the crossover course from the Inspo, I still have lots of questions without a manual. Is it was possible to calibrate the unit the night before the dive? If both primary and secondary are set to power save and the hud is disabled, would there be any drain on the batteries?
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30th December 2007, 11:27	#2 (permalink)
Chris Go Nude Or Go Home Current Rebreather/s: Megalodon Other Rebreather/s: Inspiration Classic Megalodon Prism Topaz Sport Kiss Join Date: Feb 2005 Location: Perth, Western Australia Posts: 601	Re: Calibrating the night before? Huh ?? You don't have to leave it on after a Cal. Its no Ybod I pretty much always Cal the Meg the night before, actually its 9:30pm and I just finished doing a Predive including Cal for a 10am splash tomorrow. Usually our dives involve very early starts, thanks Luke Last thing I would want to be doing is a Pre Dive at 5am in the morning. Just Prep the Meg as per the checklist including Calibration then turn it off. 10 mins before getting in the water open the can turn it on, close it up do a positive and negative then go for the dive. Can't say I have ever had a cell drift overnight, usually spot on for weeks at a time. Cheers Chriso __________________ Megalodon Sorb and Sensors whilst in Australia www.divetub.com.au Diving & Photography @ www.uwphotog.com Last edited by Chris : 30th December 2007 at 11:31.
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30th December 2007, 11:57	#3 (permalink)
offpro Supporting Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Dec 2006 Location: tromsø, norway Posts: 71	Re: Calibrating the night before? Quote: (Originally Posted by Divejunkie) Is it was possible to calibrate the unit the night before the dive? yes the head only calibrating kit makes it easy...!
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30th December 2007, 12:15	#4 (permalink)
divingabe New Member Current Rebreather/s: Megalodon Other Rebreather/s: Sport Kiss Join Date: Oct 2005 Location: Sag Harbor Posts: 74	Re: Calibrating the night before? The answer is Yes to both question. If you are using Apecs Electronics there is a power drain whenever the units are left on whether asleep or not. To save on the batteries you should turn them both off and just turn them back on prior to diving. I always calibrate the day before diving and then check if I still have proper reading when I turn the units back on prior to diving and if they are too far off then I would recalibrate, but so far it has not happened. As far as drain on the batteries, I have had a couple of senior moments and left the power on for a couple of days after cleaning the unit and playing with the controllers just to find out that I spent the batteries because even though they units are on the sleep mode they do still drain power.
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30th December 2007, 12:48	#5 (permalink)
Divejunkie New Member Current Rebreather/s: Megalodon Other Rebreather/s: Inspiration Classic Join Date: Nov 2005 Location: Cumbria Posts: 29	Re: Calibrating the night before? Quote: I always calibrate the day before diving and then check if I still have proper reading when I turn the units back on prior to diving and if they are too far off then I would recalibrate, but so far it has not happened. By too far off do you mean the O2% reading on the handsets?
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30th December 2007, 13:11	#6 (permalink)
Chris Go Nude Or Go Home Current Rebreather/s: Megalodon Other Rebreather/s: Inspiration Classic Megalodon Prism Topaz Sport Kiss Join Date: Feb 2005 Location: Perth, Western Australia Posts: 601	Re: Calibrating the night before? Just out of curiosity who did your cross over Cheers Chriso __________________ Megalodon Sorb and Sensors whilst in Australia www.divetub.com.au Diving & Photography @ www.uwphotog.com Last edited by Chris : 30th December 2007 at 13:30.
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30th December 2007, 13:16	#7 (permalink)
Divejunkie New Member Current Rebreather/s: Megalodon Other Rebreather/s: Inspiration Classic Join Date: Nov 2005 Location: Cumbria Posts: 29	Re: Calibrating the night before? Quote: (Originally Posted by Chris) Just out of curiosity who did you cross over Cheers Chriso Dennis Vessey
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30th December 2007, 13:22	#8 (permalink)
*diverklondike* Moderator Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Oct 2005 Location: Delaware, USA Posts: 1,463	Re: Calibrating the night before? Quote: (Originally Posted by Chris) Just out of curiosity who did you cross over Cheers Chriso Ditto on that question.... This is not a ding on you personally but it exactly goes to the importance of good cross over training.... Best of luck! Mark Last edited by diverklondike : 30th December 2007 at 14:11.
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30th December 2007, 14:02	#9 (permalink)
divingabe New Member Current Rebreather/s: Megalodon Other Rebreather/s: Sport Kiss Join Date: Oct 2005 Location: Sag Harbor Posts: 74	Re: Calibrating the night before? Yes I do mean the reading on the handsets. After calibration it will read 20.9 on air. The next morning it should read the same as when you calibrated and to be .1 off either way would not warrantee recalibrating unless you feel compelled to do so. My view is if it does show greater than .1 off I would then recalibrate. Sorry for being unclear I meant it to be .001, as far as error differential. I use the ballpark of .211 - .208 therefore above .212 or below .207 I would recalibrate. Last edited by divingabe : 30th December 2007 at 16:18.
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30th December 2007, 14:13	#10 (permalink)
*jradomski* Moderator Current Rebreather/s: Inspiration Classic Sport Kiss Optima rEvo Other CCR Home Build Other Rebreather/s: Inspiration Vision Evolution Megalodon Classic Kiss rEvo Other CCR Home Build Join Date: Mar 2005 Location: "Da" Bronx Posts: 2,817	Re: Calibrating the night before? Quote: (Originally Posted by divingabe) Yes I do mean the reading on the handsets. After calibration it will read 20.9 on air. The next morning it should read the same as when you calibrated and to be .1 off either way would not warrantee recalibrating unless you feel compelled to do so. My view is if it does show greater than .1 off I would then recalibrate. .1 is a HUGE error.. .3 when it should be .21 would not be acceptable.. .20-.23 would be in the ballpark.. but since the meg uses a 2pt cal and one is air.. I would really be looking for as close to a .21 as possible __________________ 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 jradomski : 30th December 2007 at 14:15.
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