New Aeris Download Software

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Hmm. I'm feeling a little dense regarding SAC. Start and End Pressure (and therefore Pressure Used) is already in the log. So I entered Cylinder Size (77.4 ft3) and expected SAC to be automatically updated. But it wasn't. I exited the dive window and then the entire program. Cylinder Size was still updated, but SAC remained blank.

What am I missing?
 
On the previous post I mentioned that Cylinder Size should cause SAC Rate to be updated. After further review, that's of course a silly statement. SAC is in units of PSI/min, so of course the Cylinder Size has nothing to do with the calculation.

But I'm still confused why SAC isn't updated. And to add to the confusion, I just noticed that my last six dives out of 34 total have the SAC properly filled in. But why not the first 28 dives?
 
OK, one more spam. Sorry. :)

How the heck is SAC Rate (PSI/min) calculated? I assumed it would be Pressure Used (PSI) divided by Elapsed Time (min). But the numbers aren't right.

Also, I checked my wife's dive log (also on an Atmos AI), and only her last six dives had a SAC. And her SAC was also wrong.

Very confused.
 
SAC is equal to PSI/min corrected for surface conditions. In other words, if you breathed 60 psi/min at an average depth of 33ft your SAC would be 30 psi/min. You can then use this data plus cylinder volume to calculate RMV as expressed in cubic feet per minute.
 
Ok so what I've found is that the only dives that get a SAC rate calculated
are dives that were download using the 2.x software. All my dives that were
imported from 1.x s/w don't get SAC rates calculated but recently downloaded
dives using the 2.x s/w do.

Also, I don't think the SAC calculation is correct. I can't figure out how they
calculated it.

I use this to calculate SAC:
SAC rate = (Pressure Used) / (Elapsed Time) / ( (AV Depth + 33) / 33 )
which is same as this which is what some people use:
SAC rate = (Pressure Used) / (Elapsed Time) / ( (AV Depth / 33) +1)

Here are my numbers from one of my dives:
Pressure used: 2282 PSI
Elapsed Time: 48 minutes
AV Depth: 38.8 FT
MAX Depth: 88 Ft
SAC rate = (2282) / (48) / ( ( 38.8 + 33) / 33 )
SAC rate = (2282) / (48) / ( ( 71.8) / 33)
SAC rate = (2282) / (48) / (2.1758)
SAC rate = 21.85

Yet the SAC rate calculated by the program is: 12

Their SAC numbers are all over the place,
When I calculate them by hand, they tend not to varry as much.

Am I missing something here?

--- bill
 
Warning newbe question ahead........... I was looking to purches the AERIS ELITE wireless computer and did not even think about the software and any bugs it may have. I have been reading this thred and thought i would ask. Is the software really that buggy or is it more of a " using the software and trying to get all you can out it"?
I would not want to spend that kind of money for a good computer but get stuck with a PC interface system that only works on the second tuesday on the odd number weeks.
 
I guess from somebody looking in and not having used the PC s/w,
it might look pretty bad. In the grand scheme of things, I'd pick the dive
computer for its capabilities, how it works and feels in the water not on how well
the PC s/w appears to be. All the PC s/w packages for the the dive computers
seem to have issues and could be better - Thats the nature of PC software.
Depending on how you use the PC software, those issues can be anywhere
from not very noticeable to downright frustrating.

Consider this, you'll use the Dive computer on EVERY dive and be referencing
it multiple times during the dive. To me, having the information needed easily
available in a way that's easy to understand, will ensure doing safe dives
and is more important than whether there are some issues with the PC s/w.

PC s/w is easily updated and there are even some 3rd party developers
that have alternatives to the s/w provided by the manufacturers should
you find that the supplied s/w doesn't meet your needs.

Specifically on Aeris/Oceanic s/w. I've been fairly impressed with the
attention the PC software is now getting. The 2.x s/w is much better
and easier to use than the 1.x s/w. Aeris/Oceanic seems to be listening
and responding to users suggestions. There have been several releases
since December all adding features, fixing issues, and making the
s/w easier to use.

Ogre, one thing you could do is actually try the PC s/w for yourself,
BEFORE you buy the computer.
Go over to the Aeris web site and download the latest s/w
and try it. It will work without having a dive computer. Obviously, you can't try
downloading or configuring a real dive computer but you can do everything
else. There is a sample diver log and you'll see what all the screens look like
and can even enter manual dives. If you are concerned, it is probably
worth doing.

--- bill
 
Regardless of how bad the software is, you will love the computer. I have the Atmos AI and simply love it. I've got 36 dives on it and there is absolutely nothing I don't like about it (pardon the double negative).

As Bill says above, download the software and play with it. Then again, maybe you shouldn't. I'd hate for you to be dissuaded from buying Aeris because of the software.
 
https://www.shearwater.com/products/teric/

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