Halcyon RB80 info.

CCR900

Just showing you the respect you deserve

jont

2) What possible advantage do they have over CCR's ?

It is believed by Halcyon that on long dives (9-hour dive that the WKPP lead divers used to do), the sensors might be rendered inoperable due to the moisture built up within the loop. Thus they wouldn't be safe to use for O2 injection.


This seems to me to be a potentially valid reason, but wouldn't a dill. spray over the sensor face cure this???? and validate functionality??

I have seen several systems that have this feture (Cis, Meg, Insp, Boris).

decoweenie

Having never done such a long dive nor experienced first-hand any diluent-spray system, I can't comment since I would be talking out of my other end...

But having done 2 to 3-hour dives on CCR, I know that the condensation on the hoses comes back more quickly after I have cleared them. So I would tend to think the same might apply to the sensor area...

__________________
"...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..."

- Rebreather World PM

nmanfield

Hi David, Met a great bloke who lives and works out of the Phillipines who has one of those beasties. He was on this board as graham_hk. His email is moose_hk@yahoo.com

Wish him the best from me,

ATB

Nick

decoweenie

I thought Graham Blackmore has a Rebreather-80-copy ?

__________________
"...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..."

- Rebreather World PM

jont

Yes there's no question that condensation in the hoses comes back quickly, I have done 4-4 1/2 hour dives and have never had any kind of sensor problems, I am curious to see how real that problem is.

decoweenie

If all 3 of the sensors are affected, how would you know if there is a problem or not ?

Of course, this is all theoretical discussion since we (you & I) do not have first-hand knowledge about how condensation affecting sensors...

What happened if the condensation is making the sensors read higher or lower than the loop PO2 ?

As far as the electronic is concerned, it just take the reading and act accordingly. So the loop PO2 might not be correct per the electronic PO2 display. Just as an example...

Thus the reason for the diluent-spray mechanism to clear the condensation off the sensor face. Then hopefully, the PO2 reading might show a different value, but for how long ?

Again, just for discussion until someone knows a lot more come along and explain it all...

__________________
"...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..."

- Rebreather World PM