DM5 and twins?

[johnnyblackau]

Hi,

I'm more than likely over looking something, but how do you let DM5 know that your diving with a twinset in the dive planner - it keeps saying out of gas half way along the dive plan.

Cheers

Blackie

 

[tbone1004]

never used it, but can you not just put 2x the gas in? I.e. I'm diving HP100's so 102cf at 3500psi, but just put 204cf in at 3500psi? I imagine tank size and working pressure are input variables because getting all of the tanks in there would be a bit cumbersome to navigate through

 

[Hendrik@Suunto]

Hi.
exactly, as it's the same gas the tank size just needs to be doubled. A virtual twin-set so to speak...

 

[Subcooled]

And it is tank size specifically, that needs to be doubled.

Independent tanks/side mount: If you use X bar/psi on one tank and Y bar/psi on the other, then use the average of pressures remaining.


Don't double the pressure, or funny things will happen to the calculated gas consumption rate. Yes, I tried.

 

[DuboisP]

easy with metric

 

[Subcooled]

easy with metric

Well, the strange idea of measuring volume as "amount of free gas" and not as "volume" could be implemented on the metric system too. I never understood it. A volume is a volume is a volume no matter how much gas you force into it.

I believe that everybody should move into this system of geometrical volume for easier calculations.

The choice between metres and feet (without shoes), or between bar/ata and psi, is just a matter of scaling. It's irrelevant.