Xtx 200 ??

[MarcSnap]

After trying my new regs, I have a hard time to beleive that everything is fine.. This is what I get from my repair shop where it was examined over and over... When I am at depth, in a vertical position I can't really look up without sucking hard on my 2nd stage.. I understand that if I am laying on my back it's normal to have a harder time to get air but I never heard of vertical looking up.. No problem looking down when vertical or in the horizontal position,,, only looking up... My GF who is using a Kronos can look up and doesn't have any problem !! well not like me anyway.. Is this happenend to anyone?..

Thanx

 

[rstofer]

I have attached a jpg that shows why it is often more difficult to breathe from a single hose regulator when vertical and, by extension, it would be more difficult when looking up than when looking down simply due to the difference in distance between the regulator diaphragm and the lungs.

Of course, if the cracking pressure is too high, it will be even more difficult to breathe and you should probably find out exactly where the regulator is set. From the User Manual you may find a specified cracking pressure.

Richard

 

[MarcSnap]

Well thank you for the explanation !!!,, I knew about beeing on my back face up, but I never had a hard time vertical ( going down feet first ) looking up... I was just surpise that my Girlfriend did not have so much of a problem like me that's why I posted this.. Well appreciated..

 

[rstofer]

Why don't you swap regulators and see what each of you thinks. There could be a problem with the adjustment of your reg. If she feels the same way, two people aren't wrong!

Around here, nobody seems to use that 'Predive-Dive' switch correctly. Despite all the engineering that went into the concept, our small herd tends to leave the reg in 'Predive'.

Your regulator is a very expensive model. Between the dive switch and the diver adjustment knob, it should do everything but eat.

Richard

 

[MarcSnap]

Well thanx for the tip, I might do the switch with the GF so she can try mine !!!,, See that's the problem after buying a new regs like this one,, I took it twice to a Regs Tech at my dive shop and both times he told me that he reseted my regs to the most sensitive settings but nothing's changed... I played with the diver adjustment knob and no much difference there also.. I don't want to speculate about him knowing about the predive settings because I don't know much about this type of Regs myself..

PS: How do you know the position of the dive switch ?,, ( predive or not )

thanx again

 

[rstofer]

On the very few regulators I have seen, there are a '-' and '+' symbol near the lever. The '-' position (usually forward) is the predive position and the '+' position (usually toward the diver) is the dive position.

See page 8 of 15 of this document http://www.diverite.com/downloads/diverite_134.pdf as an example.

The switch controls the venturi effect. In predive, the air stream is directed back at the diaphragm to help push it outward thus preventing free flow. In the dive position, the air stream is directed toward the diver and away from the diaphragm. Apparently this helps pull the diaphragm inward as the diver breathes and increases flow toward the diver. The harder you breathe, the more air you get.

At least that's how I understand it. Of the 3 divers in our small herd that have adjustable regulators, I don't believe any of them are setting the reg to 'dive'. My regulator doesn't have any knobs or dials. It's just breathe and go. But it's certainly not on a par with your regulator.

Richard

 

[MarcSnap]

WOW amazing !!!,, I had the valve fully set to the pre dive setting -... I just played with it and never noticed this valve before lol,, I played with the diver manual knob before without any success and now I now why !!!!!,, Well I am glad you told me and can't wait to try it next weekend... I will post my test result when I get back.. Thanx again for the help much appreciated...

 

[MarcSnap]

Well I forgot to mention that I hope diving in pre dive setting so many times did not hurt the Regs ?? Thanx again

 

[rstofer]

Well I forgot to mention that I hope diving in pre dive setting so many times did not hurt the Regs ?? Thanx again

No, it doesn't matter. You can look inside the mouthpiece of some regulators and see a diverter mechanism that redirects the air flow. On some regulators it is like a round tube cut in half lengthwise and connected to the knob.

I hope all of this helps. By all accounts you have a top notch regulator.

Richard

 

[jeckyll]

MarcSnap: Did you buy this regulator new? If so, did it come with a manual that explains the settings, maintenance intervals etc? Might be worth reading

Glad you found the switch for dive / predive. If you tilt your reg mothpiece downwards while entering the water, it should be fine (i.e. no freeflow). Look back at the picture earlier in the thread to understand why

Enjoy the 200, it's a top of the line reg.