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PostPosted: Mon Oct 01, 2018 6:53 pm 
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Joined: Mon Apr 07, 2014 7:06 am
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Location: Halifax, Nova Scotia, Canada
Dive Computer: Suunto
I recently switched my dive computer to metric, and then selected metric for MacDive. All units convert ok except SAC rate. My normal rate is about 0.5 to 1.0 cuft/min. However, the SAC rate now shows up in the range of approx 130 to 190 litres/min. It should be about a tenth of that. My normal rate converts to 14 to 28 litres/min. Thoughts anyone?


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PostPosted: Mon Oct 01, 2018 11:35 pm 
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Joined: Sat Apr 12, 2008 8:33 am
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Dive Computer: Shearwater Perdix AI
Your tank size is probably still in imperial (80 litres).

Tank sizes are not translated.

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PostPosted: Wed Oct 10, 2018 6:10 pm 
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Location: Halifax, Nova Scotia, Canada
Dive Computer: Suunto
nick wrote:
Your tank size is probably still in imperial (80 litres).

Tank sizes are not translated.



Yes, you are correct. Not only does the tank data have to be metric but the data is in tank volume measured in how much water it would hold, as opposed to how much air can be compressed. So a 100 cuft tank which would hold 2832 litres of compressed air, is actually entered as 12 litres at 206 bar. Thanks for getting back. Barry


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PostPosted: Thu Oct 11, 2018 3:13 am 
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Woops. I meant 80 CF in imperial, vs in metric where it's in litres. But you get the point. You're correct, they are different measurements. Hence they don't translate.

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