Gas management terminology

What terminology and units do you use to describe breathing rate at the surface?

  • Respiritory Minute Volume (RMV), L/min or cu ft/min

    Votes: 3 9.4%
  • Respiritory Minute Volume (RMV), bar/min or psi/min

    Votes: 0 0.0%
  • Surface Consumption Rate (SCR), L/min or cu ft/min

    Votes: 4 12.5%
  • Surface Consumption Rate (SCR), bar/min or psi/min

    Votes: 0 0.0%
  • Surface Air Consumption (SAC), L/min or cu ft/min

    Votes: 21 65.6%
  • Surface Air Consumption (SAC), bar/min or psi/min

    Votes: 2 6.3%
  • Some combination of the above (please define in post)

    Votes: 2 6.3%
  • Other (please define in post)

    Votes: 0 0.0%

  • Total voters
    32

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Just look at the metric tank rating for a set of double manifolded LP95's:

30 litres/bar.

And there are 28.3 litres in one cubic foot;

So 30 litres/bar divided-by 28.3 litres/cubic foot equals:

1.1 cubic foot/bar.

Therefore, a SPG in bar units used with a set of double LP95's will also indicate remaining volume in cubic feet, to a reasonable approximation. . .:eyebrow:
 

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