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On Fri, 3 Feb 1995 Christina_Young@Wa*.Me*.co* wrote: > > Sten, > > Yes, I had thought about 1st stage reaction to pressure being drawn > by the second stage. That is why I stated, "pressure not to exceed > 170 psi". When the IP is set at 170 psi, for instance, on the Odin, > does this mean that when pressure is drawn (resulting in an IP drop, > recognized by the feedback loop of the 1st stage), the IP *exceeds* > 170 psi??? I have not tested IP's in this range on my Jetstream first stage. But the feedback was strong with the original HP-seat. I meassured some 2 bars boost of the IP messured at the suit infaltor when I pressed the purge. At low flows (ie a slow inhalation) the pressure boost was minimal. When I made these tests the IP was set at approx 9 bars. During one period the hole from the "R" port to the membrane chamber was machined so that a plastic insert could be fitted. This inset has a 1 mm hole. With this insert the feedback was reduced and a Cyklon second stage could be fitted to the "R" port, and work with the right IP (12,5 bar) (1 bar = 14.50... psi) /Sten Meyer m87stme@mt*.ch*.se*
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