The Blender program was based on reading up on the work of
Van der Waals on real gases rather than the ideal
gas. Using this program I routinely blend 300bar Nitrox and trimix breathing
gases.
OK, so again it's written for me and hence it has been tested on a sequence of Samsung S4/6/8 over the years as the development test bed and has been downloaded from the web site onto a slightly dubious old 'Superpad' tablet that I bought cheap to see what Android was like but who knows what else it will run on? The display is set to scroll if required so if your screen is shorter than mine you can get down to the bottom easily enough. To use it you just enter the values you want and it reworks the values when you 'click' the Calc button.
It started with the same code as the IPAQ version and I put them next to one another and always got the same results so I have moved my source of blending instructions to the phone. I offer no other promises other than 'it works for me'. Yes, I'm sure it could be made wonderful and pretty with 'roll the value' inputs but I can't be bothered. This version is a rebuild in 2018 and has migrated through versions of Android Studio over the years due to the Google not being smart enough to write backward compatible code. On the last rewrite I used the Android NDK to chop in proper C++ code to do the mission critical bit, this is life support remember - your life, but Android will never be a Java Free Zone.
Use the Menu, the three dots thing, to select the Decanter planner. This will tell you what to expect if you fill one cylinder of mix from another with or without a needle valve or even a booster.
There are three values on the Settings page you can tweak if you like:
Firstly my Air Products supply cylinders are 50L as are many others are. I use this to calculate the starting supply pressures.
Secondly I consider the temperature to be uniformly 20°C. This is obviously not true but doesn't really matter. What does matter is that you let things cool back towards the starting pressure if you want it to be really accurate. See my stuff on heat for a full explanation and why it is often near enough if you don't.
If you don't understand downloading software to android please don't try. I am not going to be able to help clean up the mess if you brick something by being clumsy. On my S8 it likes its .apk files to be in Download/received_files before it is even prepared to consider loading them.
Download blender.apk and your phone/tablet should understand it as it has all the required signatures and manifests. If you download it should first give a warning then a message on the top bar saying you have downloaded it. Select this to be asked if you meant to install it. That should put it in your installed program pages. You can then put it on your main pages if you so wish. Current Android releases default to only downloading from their approved places but ask if you want to change this.
All programs here ©Copyright Nigel V. Hewitt 2000/2018. No promises that they work or even give safe results are made. They are free and worth nothing more than that. If anybody tries to charge you for them, other than a reasonable price for the media they are supplied on, then demand your money back in an unreasonable and unfriendly manner. You use them at your own risk as part of range of diving tools - do not use any results without independent corroboration that they are safe.
Report bugs to
or get your executor to do so.
by Nigel Hewitt
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