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That seems a bit strange. Just to pressurize the hoses, you should only have to crack the valve. I found when practicing breathing while feathering the valve, it only takes a quarter to half a turn for there to be sufficient flow at 60 fsw. Maybe not all valves work the same way.redrover:
It could be that the computer only takes a reading every 2-5 seconds... so the amount of time between 1/4 turn and all the way on could be that delay.Daryl Morse:
Im a geek but, thats what I thought, Atomic B2. Could it be because it is a piston valve?Daryl Morse:
I didn't realize you were using a hoseless AI computer to read the pressure. The strange behaviour you're reporting must be related to the computer and/or the pressure transducer. You should raise this in the computers forum to see if others with the Atom experience the same behaviour. The only AI computer I've used was a Cobra which uses a hose. There was no delay for it to provide pressure.redrover:Im a geek but, thats what I thought, Atomic B2. Could it be because it is a piston valve?
1) Im a new diver with new gear purchased in rapid succession, it certainly could be me being so inexperienced. Had the tank valves tested and are good. I have been having computer problems and currently using both #3 and #4 trying to see if its me or the computer. Only 4 dives with both so far. Dive #1: #4 whacky, #3(w/changed battery)less. Dive #2: both wacky. Dive #3 today: both hunky dory. Hal if I know.
2) Bought tanks and wasnt checking until setting up to dive and the first two times out with them having low fills (or 4 tanks low at begin dive). Made a bit of a fuss with the shops (2 diffrent ones). Wasnt sure what was acceptable variance, but one at 2400 seemed way to low, so checked the next 2 tanks before heading out from fill the night before, air temp is pretty consistent here. One read 2600 and the other 2700psi and really cranky I hauled them right back to the shop before diving. Danged if their gauge didnt read 3100+. I check with full on now and since that embarrassment, computer reads 3100+.
3) Computer is Atom set to sample 15 sec. If you havent used one it doesnt show tank pressure on main screen, you have to access the pressure .I sure hope this does not set off the why computers are devil spawn posters...and when dry it first goes to battery status then transmitter link before pressure then goes back to main screen. So to check the pressure I just tweaked the valve on one turn, held the computer in position to receive and thru the screens to pressure, twice, with same (Ive rounded) value. And now, I turn the valve all the way on, do the same thing and it shows a full tank.
I did do the not turn it on all the way and descend thing once. Checked and it registered full, breathed fine on check, thru giant step entry and clear from shore. I went to my snorkel and swam out a ways. Breathed fine as usual descending until noticed it breathed a bit harder every 3 breaths or so at 30 and Atom screamed OUT OF AIR, a bit discerning. I looked for bubbles figuring I didnt put it on right, nope. Breathing was ok, just noticeably harder. Yes the flo valve was open full. Wait, says full cripes am I narced at 30 or just hallucinating for no reason? OUT full OUT .full... I headed back up and breathing was fine again by 15, computer still back and forth - out to full. Then Duh! I think I slapped my head; is it on all the way? Nope, Id done the check my transmitter with one turn, had 3000+ and neglected to pay adequate attention to detail. (Fixing was a nice multitasking opportunity, tried very hard to kick myself at the same time.)
My Cobra has a couple second delay... not long, but I have an SPG hooked up, too, so I know what the real pressure is, and it takes the Cobra a 1-2 seconds to register it correctly when first pressurizing the system.Daryl Morse:
An HP120 such as the PST E8-119 or E7-120 could certainly have a yoke valve attached. My E8-119 from FillExpress comes with a DIN/Yoke convertable valve. Now, if you aren't meaning PST's 3442psi@70F service pressure, then let us know the specifics.jonnythan:
Just to note, HP120s are different tanks from the E-series tanks. The HP120s have different tank threads and can only be used with DIN valves.rab:
Doc Intrepid:
