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<davehi41@ao*.co*> writes: > I am missing something. The isolator valve closed? Who is looking at the > pressure gauge? I guess the pressure gauge is on the same side of his primary > regulator! If it was with his primary, and if he was checking it at all, then a precipitous drop in pressure (twice as fast as expected) should have led to an early ascent. If anything, it not dropping at all due to being on the opposite side and a valve being closed, or the needle being stuck, is the more insidious case and the diver has to realize he shouldn't still have that much air. Has the investigation ruled out any sort of problem on the bottom that might have led to him closing the iso down there? (Hopefully there aren't still any diveshop employees who turn off iso valves, or who fail to check that they're open before filling. I've heard of one owner who thinks horrible things happen if he fills doubles all at one go, and who therefore closes the iso and fills each side separately. A diver I know tells a story of another shop; he brought in a set with a non-iso DIN manifold, and when he picked it up the owner said "You only had a yoke adaptor in one side, so I was only able to fill that side but I'll only charge you for one fill".) > I guess checking the isolation valve yourself when you start down or when you > hit bottom is out of the question! Every dive, as part of general checkover of the rig right before I turn around and put my arms in the straps. Before and after every time they get filled, too. -- Anthony DeBoer <adb@on*.ca*> -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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