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Post by Mike Nelson on May 15, 2007 4:17:18 GMT -8
Can anyone give me some Tech help on the new Mistral?...Here's my dilemma: I brought my Mistral into my local dive shop for the annual and was told that it was very out of spec (intermediate?). It was adjusted into spec, but when put on a tank, one breath caused severe freeflow. I was told the if I squeeze the right hose, it would stop. Unacceptable....I had the tech readjust to hopefully the original setting, but I'm sure he forgot what it was and it now breathes poorly. My take is the spec he has is incorrect and should call Aqualung tech support for assistance. Hopefully this will be the case. In the event it is not, can anyone tell me what the spec is for the intermediate (if this is even the problem)...Should it be set like the Titan?.....I appreciate any input that you guys can give me.....Keith (Mike Nelson)
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Post by scubadiverbob on May 15, 2007 4:49:35 GMT -8
Hint: you said it ... it is a Titan (a little modified); but, the IP might be set different due to the way it is modified. Good luck contacting USD about it. Unless they certified you to work on it, they probably wont give you the time of the day. Check out the regs Dan has for sell. The Voit Swimmaster two hose will do everything the new aqualung mistral will do at a better price. (If I had $600 to spend right now it would already be sold!). That is one heck of a nice regulator! If all else fails, send your new Mistral to Dolphin Scuba in Sacramento, CA. Put "attn: Jan" on it. He will know how to make it work again.
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Post by scubadiverbob on May 15, 2007 5:06:58 GMT -8
Dolphin Scuba Center, Sacramento 1-800-4-DOLPHIN Dolphin Scuba Center, 1530 El Camino Ave., Sacramento, CA 95815 Phone (916) 929-8188 Fax (916) 929-3528 Store Hours M-F 9am-7pm, Sat 9am-4pm, Sun 11am-4pm. www.dolphinscuba.com/ |
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Post by scubadiverbob on May 15, 2007 5:22:48 GMT -8
Just a thought ... the store you are taking your new style mistral to, are they actually cert. to repair the new mistral or do they just sell it? I worked at a dive store repairing single hose regs about seven years ago. They would have sold any reg anyone wanted to buy; but, that didn't mean I'd know how to service it.
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Post by Mike Nelson on May 15, 2007 6:54:29 GMT -8
They are an authorized USD dealer, so I assume they can work on it. They did..........Thanks for the info, I'm going to contact them today after they open..........Keith
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Post by duckbill on May 15, 2007 8:45:14 GMT -8
The word on the street is 135 +/-5
BTW, the venturi is what maintains a freeflow after breathing stops. Pretty common out of water on a sensitive system. You might not have had a freeflow problem under water.
If it wasn't leaking air before you took the breath, then I doubt the problem was the IP.
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Post by nemrod on May 15, 2007 10:34:14 GMT -8
This why it is best to learn to do your own repairs.
There was a thread on vdh about Mistral IP a few weeks back BTW.
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Post by SeaRat on May 15, 2007 17:29:11 GMT -8
There are a couple of things to think about here. If that one breath provided a free flow when you took your mouth off the mouthpiece, then that is normal. This regulator provides all the air you could need underwater, and in order to do that, it needs that kind of venturi assist. The one I tested in the shop free flowed with an inhalation if I took my mouth away from the regulator, and that is what I was looking for. I have two regs that will do that, my AMF Trieste II (highly modified), and my Sportsways Hydro-Twin. Both are very sensitive regulators.
However, if this regulator freeflows through both hoses with your mouth still on the mouthpiece, then you have it set too high on the intermediate pressure. Simply back it off until the breathing is what you want, and stop there. It's pretty easy to do, and does not rely upon an intermediate pressure guage, but it should be somewhere around the specs that Duckbill stated. What you don't want is "blow-through" because of the venturi. What you do want is an active venturi assist though, as otherwise it will breath hard under diving conditions. The New Mistral is very well-designed for the breathing characteristics (not for compatibility with doubles, though). I would not think about getting rid of it at all; you simply have to learn more about it and its design characteristics. For instance, the mouthpiece venturi is very well set up.
One other thing--don't depend upon the LDS to understand this regulator. It operates differently than what they are used to, and with the number of them out there, they probably will make no effort to try to understand it. If they were interested, they would not have given you the type of service that you got. You might look for another LDS certified in Aqualung gear.
John
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