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You can also easily change the fill order to match your situation. The target pressures are “ideal gas law” values so you can account for He compressibility in the way that you find works best for you.
Tap on the bookmark icon to recall a previously saved calculation or to save this calculation for future use.
You can easily make the calculations using Metric or Imperial/US by selecting the “Settings” tab (if it is not visible on the current screen select “More”) and changing the system to the one desired.