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**PhilSiswick** · 18th January 2007, 08:56

Quote: (Originally Posted by UKSteve)

Thanks for the info...

It would seem that the Inspiration and Evolution then are in the minority of production eCCRs (don't know about the Prism) in that if you jump in with handsets off they will not come back on again due to a pressure / water switch.

Given that there must be power running to the handsets to allow the "soft" switches to work I wonder why APD went down and have subsequently stayed on this path?

I personally would prefer to see the handset switching on automatically... and other than maybe it burning through batteries faster is there any other reason why they might not have provided this function?

Steve

Is there a risk that you could end up with a situation where an uncalibrated unit switched on automatically and does more harm than good. You wouldn't know that the calibration wasn't correct. If the unit isn't switched on, you should bailout - the safe option. Also, how would you deal with the self-test routine? Would you skip that if you leapt into the water with the handsets switched off - not a good idea, I'd say, but would a self-test be valid underwater?

You could put a time-out in, that the unit only auto-switches on if the period between self-test and/or calibration was up to x hours before, but that still leaves you with a strong chance that you could hit the water and the unit wouldn't switch on.

I'd love to know why AP have not gone down this route, but I suspect that there is a pretty good reason.

Cheers,

18th January 2007, 08:56	#35 (permalink)
PhilSiswick Phil Siswick, Tango Current Rebreather/s: Evolution Other Rebreather/s: Inspiration Vision Join Date: Apr 2006 Location: Oxford, UK Posts: 1,062	Re: Read and Learn...... Quote: (Originally Posted by UKSteve) Thanks for the info... It would seem that the Inspiration and Evolution then are in the minority of production eCCRs (don't know about the Prism) in that if you jump in with handsets off they will not come back on again due to a pressure / water switch. Given that there must be power running to the handsets to allow the "soft" switches to work I wonder why APD went down and have subsequently stayed on this path? I personally would prefer to see the handset switching on automatically... and other than maybe it burning through batteries faster is there any other reason why they might not have provided this function? Steve Is there a risk that you could end up with a situation where an uncalibrated unit switched on automatically and does more harm than good. You wouldn't know that the calibration wasn't correct. If the unit isn't switched on, you should bailout - the safe option. Also, how would you deal with the self-test routine? Would you skip that if you leapt into the water with the handsets switched off - not a good idea, I'd say, but would a self-test be valid underwater? You could put a time-out in, that the unit only auto-switches on if the period between self-test and/or calibration was up to x hours before, but that still leaves you with a strong chance that you could hit the water and the unit wouldn't switch on. I'd love to know why AP have not gone down this route, but I suspect that there is a pretty good reason. Cheers, __________________ Phil (WSKD 0001) I have always felt that the dive I am on is not nearly important as the dives I plan to be on the rest of my life. Tom Rose, 2007 The person who gets the farthest is generally the one who is willing to do and dare. The sure thing boat never gets far from shore. Charles A. Lindbergh www.hugsac.org.uk
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