POLL: Who is homebrewing Nitrox/Trimix and for how long now?
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ninja
Guest
Dosen't everyone??
NINJA:ninja:
NINJA:ninja:
wb416
Contributor
I've been brewing periodically since my buddy and I got blender certs last spring, and he sprung for a trailer with compressor and bottles....
A "T" bottle of UHP He will be delivered tomorrow, and by tomorrow night I should have my double 104s spiked and ready to have air blown on top of them Wednesday morning for my first Trimix dive this weekend!
Roak
Roak
Roak... you only need luck if you're gambling
Questions:
Is this your first trimix dive or your first home mix or the first this weekend?
What are you using for a gauge?
What is the mix you are shooting for?
How much He are you going to add?
Are you adding O2 also?
Where (and what) are you diving?
Anything else you can add for the inquiring minds?
>>Roak... you only need luck if you're gambling
Yup, just a figure of speech.
>>Questions:
>>Is this your first trimix dive or your first home mix or the first
>>this weekend?
Yes.
Been picking the brain of the guy up in Denver thats been mixing for the group to make sure I hit my mark. Ive got all the time in the world to spike the cylinders, so hitting the PP pressures should be an non-issue. Ill overshoot the He slightly tonight and top off tomorrow morning and put the O2 on top after that (not much O2).
>>What are you using for a gauge?
Psi-Tronix PG-5000. I got mine back when Psi-Tronix would do custom orders so its calibrated for 4000 psi, so the .25% accuracy gives me 10 psi resolution. It also doesnt turn off, something that drives scubaturek nuts with his shops gauge.
>>What is the mix you are shooting for?
I don't know if I'm happy with the mix chosen by the team, but there's nothing glaringly wrong with it. We're going to 165 for 15 at an altitude of 5k feet (EOD of 200, gotta love what altitude does to the calculations!) So we're using 20/25 giving us a PPO2 of about 1.2 and an END of about 100. Fortunately were driving DOWN to 5k feet, so its the return trip that we have to watch out for. We'll probably sit around for some time on the surface/in the hotel sucking on O2 to be conserative (as well as killing a lot of time before leaving). We ascend to about 7k feet about an hour after leaving the site, with an 8k pass about 3 hours out. They're truck scales and a pay phone at the very top of the pass, and there's a DAN sticker on the phone.
>>How much He are you going to add?
660 PSI of a possible 2640 PSI (they dont like cave fills in Colorado).
>>Are you adding O2 also?
142 PSI.
>>Anything else you can add for the inquiring minds?
Were acting as support for the deep team thats going to 265. Its a sinkhole thats basically a chimney about 100 across that starts sloping off at around 200 or so. No overhead at the depth were going, so it is a very KISS dive, just the kind Im looking for to test the waters so to speak.
Any sage advice, bring it on!
Roak
Ps. Turns out I do have an REE stamped on my 104s, I just never noticed it before.
Yup, just a figure of speech.
>>Questions:
>>Is this your first trimix dive or your first home mix or the first
>>this weekend?
Yes.
Been picking the brain of the guy up in Denver thats been mixing for the group to make sure I hit my mark. Ive got all the time in the world to spike the cylinders, so hitting the PP pressures should be an non-issue. Ill overshoot the He slightly tonight and top off tomorrow morning and put the O2 on top after that (not much O2).
>>What are you using for a gauge?
Psi-Tronix PG-5000. I got mine back when Psi-Tronix would do custom orders so its calibrated for 4000 psi, so the .25% accuracy gives me 10 psi resolution. It also doesnt turn off, something that drives scubaturek nuts with his shops gauge.
>>What is the mix you are shooting for?
I don't know if I'm happy with the mix chosen by the team, but there's nothing glaringly wrong with it. We're going to 165 for 15 at an altitude of 5k feet (EOD of 200, gotta love what altitude does to the calculations!) So we're using 20/25 giving us a PPO2 of about 1.2 and an END of about 100. Fortunately were driving DOWN to 5k feet, so its the return trip that we have to watch out for. We'll probably sit around for some time on the surface/in the hotel sucking on O2 to be conserative (as well as killing a lot of time before leaving). We ascend to about 7k feet about an hour after leaving the site, with an 8k pass about 3 hours out. They're truck scales and a pay phone at the very top of the pass, and there's a DAN sticker on the phone.
>>How much He are you going to add?
660 PSI of a possible 2640 PSI (they dont like cave fills in Colorado).
>>Are you adding O2 also?
142 PSI.
>>Anything else you can add for the inquiring minds?
Were acting as support for the deep team thats going to 265. Its a sinkhole thats basically a chimney about 100 across that starts sloping off at around 200 or so. No overhead at the depth were going, so it is a very KISS dive, just the kind Im looking for to test the waters so to speak.
Any sage advice, bring it on!
Roak
Ps. Turns out I do have an REE stamped on my 104s, I just never noticed it before.
ninja
Guest
We love this stuff!!! Holiday monday i will be diving the Roy A jodrey in thest. lawrence seaway a 700 ft long algoma self unloading laker
Totally intact! Pug you would love this one Crows nest at 150 , 240 feet to the bottom with a shovel !!
I will be diving a 15/38/47 Tee hee hope you guys have a good dive your self!!
Len
Totally intact! Pug you would love this one Crows nest at 150 , 240 feet to the bottom with a shovel !!
I will be diving a 15/38/47 Tee hee hope you guys have a good dive your self!!
Len
Ya know I knew that... duh...
you might want to fudge the He up a little because of compressibility... what do you think Omar? (Beside the issue of only useing 25%.)
Shoot Len.... I woulda cashed in my frequent flyer miles and joined you if you had let me know sooner and I had any frequent flyer miles.
For sure bump up the he. I add some He and leave out some O2. How much depends on the mix and pressure. I employ a very scientific methode. I guess. After a while you get pretty good at it.
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