Ascent rate warning

colinicky · 5th May 2007, 08:12

Sometimes when I download my dives & go through them I find I have an ascent warning .eg dive last weekend 22m 41 minutes bottom time then ascend ,at 44.17 minutes at 14 metres I show an ascent alarm but at the point it shows I was actually descending a little at an Ascent rate of minus 4.5metres per minute .Why should this be ? Before this my max ascent rate had touched 6.8 m/min but only briefly

**nigelh** · 5th May 2007, 10:22

Quote: (Originally Posted by colinicky)

Sometimes when I download my dives & go through them I find I have an ascent warning .eg dive last weekend 22m 41 minutes bottom time then ascend ,at 44.17 minutes at 14 metres I show an ascent alarm but at the point it shows I was actually descending a little at an Ascent rate of minus 4.5metres per minute .Why should this be ? Before this my max ascent rate had touched 6.8 m/min but only briefly

Vision electronics?
I get that.
I think it's reasonable as it has to measure the ascent rate and then display the error so a short blip-up will be warned after the event and it needs to pause a bit so it doesn't beep like some computers do every time you lift your arm a bit quickly.

I took the VR3 freediving once. There was warnings on the warnings. It really did not like 75m/min ascent rates. At least the Vision is safe from that treatment.

5th May 2007, 08:12	#1 (permalink)
colinicky RBW Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Mar 2005 Location: uk Posts: 682	Ascent rate warning Sometimes when I download my dives & go through them I find I have an ascent warning .eg dive last weekend 22m 41 minutes bottom time then ascend ,at 44.17 minutes at 14 metres I show an ascent alarm but at the point it shows I was actually descending a little at an Ascent rate of minus 4.5metres per minute .Why should this be ? Before this my max ascent rate had touched 6.8 m/min but only briefly __________________ Colin I trust my rebreather completely , I just don't trust the user onwards & downwards
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5th May 2007, 10:22	#2 (permalink)
nigelh New member Current Rebreather/s: Inspiration Vision Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Mar 2005 Location: Brighton, Sussex, UK Posts: 883	Re: Ascent rate warning Quote: (Originally Posted by colinicky) Sometimes when I download my dives & go through them I find I have an ascent warning .eg dive last weekend 22m 41 minutes bottom time then ascend ,at 44.17 minutes at 14 metres I show an ascent alarm but at the point it shows I was actually descending a little at an Ascent rate of minus 4.5metres per minute .Why should this be ? Before this my max ascent rate had touched 6.8 m/min but only briefly Vision electronics? I get that. I think it's reasonable as it has to measure the ascent rate and then display the error so a short blip-up will be warned after the event and it needs to pause a bit so it doesn't beep like some computers do every time you lift your arm a bit quickly. I took the VR3 freediving once. There was warnings on the warnings. It really did not like 75m/min ascent rates. At least the Vision is safe from that treatment. __________________ nigelh
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