Mailing List Archive Mailing List Archive
In message <199610112235.WAA07522@ma*.te*.co*.au*>, troppo <troppo@te*.co*.au*> writes >Chris, > >My lung capacity is about 6 1/2 ltrs. I am not asking for advice how to >correctly use this thing, I was testing to see if I could use this in a high >workload, and I can't. It can not handle it. I said this would not happen on a >normal dive, where my tidal volume is I would guess <3ltrs. What do you call a high workload? i.e guesstimate of O2 metabolic consumption rate - 2,3 litre/min???? > >Secondly, the dump valve was set to stop it going OC. It was hard to force a >dump, which is necessary to stop it going OC. On another Drager Semi closed, the >dump pressure is set at the service to EXACT pressure. It can NOT be changed in >the field. Sounds like the valve was not set correctly, if set in the way you describe, then the Atlantis will bleed air off more frequently. > >The fact that the dump can be played with (even during the dive!) may most times >work, but is not optimal. At least not on a production unit. It is the only way on the Atlantis to set the counterlung(s)/ loop volume to an individual, and it does work fine. > Several incidents, >which I do not have full details on, have occured here due the the dump being >set incorrectly by the user. Setting the dump by feel is like setting line >pressure by how the reg breaths. The only thing that occurs when the valve is set incorrectly (open too far) is increased gas usage. If it is set too far closed for your lung volume, you end up with a loop volume that is slightly larger than it needs to be . Time on the unit cures the uncertanty. > > >Please note I am not giving advice, nor am I qualified to use this device, (but >who really is) I am, so are a number of people on this list, some have units to use whenever they like - this is important. I think that this is back to the old issue of the number of hours people have on a rebreather. They are different!. Regards Chris E-mail:- chris@de*.de*.co*.uk*
Navigate by Author:
[Previous]
[Next]
[Author Search Index]
Navigate by Subject:
[Previous]
[Next]
[Subject Search Index]
[Send Reply] [Send Message with New Topic]
[Search Selection] [Mailing List Home] [Home]