| Helair fill
Hi guys
would appreciate some urgent help for my dive tomorrow.
I have been to my dive shop to fill a helair fill 12/43. This I usually do by filling 100 Bar Helium and top off to 230 bar air. However due to the dive shop being out of helium I was forced to leave it there , and found it ready the following day however, when I checked the o2 it gave me 11 % O2 , The guy at the dive shop made used some sort of programme and came up with 47 % for helium but then said that this is a programme for trimix fills not helair, does anybody know how i can calculate the helium ? |