Me too until I watched it work time and time again. I realized that the gas in a scuba tank is compressed to 200 times the density it is at 1 ATA and could therefore behave differently, more like a liquid when in a scuba tank. I know there are probably much more educated people than me shaking their head but I know what I see and nitrox mixtures do not instantly become homogeneous when first blended.As moronic as this sounds, turn the tank over, then turn it right side up. Analyze. It might just read what you expected it to if it was recently blended.
Sounds ridiculous, and I used to clown on people who talked about this before I saw it myself.
For the OP take your PADI table and plan a deco dive using EAD to the MOD of your target depth at 32% (you learned how to do that on your nitrox course right?) Now do the same dive using 28% and see if there is a difference. Now ask yourself do you really know the contents of your tank? What if you read 32% right after it was blended then you went to 130ft using what could potentially be 36%. Are you going to trust these variables to the dive shop tank monkey or take responsibility for you own safety?
---------- Post added December 1st, 2013 at 10:03 AM ----------
Wow you are so wrong...
Exactly which part is wrong?