| MX Evolution |
The MX CCR RB evolution
The Mx stand for Mexico, the idea was to use
CCR efficiency thoroughly in Mexico's Quintana
Roo caves, both the long and shallow ones and
again in the extremely deep ones and define its
benefits, cons, risk and rewards, comparing with
other units.
The Mx mCCR technology choices are coming
from 17 yrs of experience diving rb fo all kinds
and 15 of those diving rb DIR style, initially with
rb200 pSCR and clones such as rb80 as well as
later experimentation with other including the MC
project since 2008.
Here I show you what I been developing in order
to be capable of taking advantage of CCR
efficiency. Others such as UTD has adopted
some of this ideas as the Explorer MX mCCR rb.
The MX CCR configuration is most suitable for
fast deep descent or extreme deep cave diving.
When diving CCR efficiency at shallow depth
caves O2 injection is a continuos task. Even is
true driving a higher PO2 "Diluent" can help a bit
reducing the injection cycle.
Is clear that pSCR efficiency is enough and more
simple at shallow cave diving for several hours
long dives, when compared to constant flow or
electronic injection solutions.
The CCR efficiency on manual mode for shallow
cave diving is very demanding a not the best
choice for a new rb diver or shallow water cave
diver, I got 75hrs in this configuration and unit.
It does works fine if you are a capable and
experience rb diver.
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Our main O2 sensor monitoring device is not the HUD, Heads Up Display,
which is this led light signal attach by the mouthpiece.
In rebreather diving Primary O2 sensor gauge should be wear on right arm
wrist, HUD / back up console is on the left side with all the other back ups.
As I only dive CCR manual, are merely verifying that gas PO2 is matching
expected PO2 drops as I don't use constant PO2.
Same as OC or pSCR diving.
HUD was invented as traditionally the consoles are so bulky, to manipulate
and read for allowing you checking them continuosly, specially in cave.
Be aware that HUDs are very temperamental, hard to see in OW and use
battery energy.
When I use HUD use it as back up and only in one console, never have
need for back up or redundancy on the HUDs.
To verify the HUD it wouldn't make sense to monitor it's driving console,
cause obviously will read the same thing, is ideal to have another complete
separate O2 console.
Different type will take care of design failures.
The most recommended are the ones with oLED displays.
This way at a glance you check time, depth and even compare and monitor
O2 sensors with the HUD information.
Available best choices that I test are X1 or DR5
The MX mCCR concept does not have any automatic injection system and
no electronics control the diving mix, all injection is done by diver manually,
"mixing on the fly".
The electronics are exclusively O2 sensors for analyzing the Mix.
Counterlungs are backplate mounted and lower, nicer than shoulder or
front mounted ones and made by Golem.
The MX configuration unit is a jurgensen Hammerhead,but may be suitable
for many other CCRs. Is really one of the best unit of the CCR specific units.
My Dream will be a rb that can do either SCR, pSCr , CCR efficiency upon
mission and hopefully something else.
which is this led light signal attach by the mouthpiece.
In rebreather diving Primary O2 sensor gauge should be wear on right arm
wrist, HUD / back up console is on the left side with all the other back ups.
As I only dive CCR manual, are merely verifying that gas PO2 is matching
expected PO2 drops as I don't use constant PO2.
Same as OC or pSCR diving.
HUD was invented as traditionally the consoles are so bulky, to manipulate
and read for allowing you checking them continuosly, specially in cave.
Be aware that HUDs are very temperamental, hard to see in OW and use
battery energy.
When I use HUD use it as back up and only in one console, never have
need for back up or redundancy on the HUDs.
To verify the HUD it wouldn't make sense to monitor it's driving console,
cause obviously will read the same thing, is ideal to have another complete
separate O2 console.
Different type will take care of design failures.
The most recommended are the ones with oLED displays.
This way at a glance you check time, depth and even compare and monitor
O2 sensors with the HUD information.
Available best choices that I test are X1 or DR5
The MX mCCR concept does not have any automatic injection system and
no electronics control the diving mix, all injection is done by diver manually,
"mixing on the fly".
The electronics are exclusively O2 sensors for analyzing the Mix.
Counterlungs are backplate mounted and lower, nicer than shoulder or
front mounted ones and made by Golem.
The MX configuration unit is a jurgensen Hammerhead,but may be suitable
for many other CCRs. Is really one of the best unit of the CCR specific units.
My Dream will be a rb that can do either SCR, pSCr , CCR efficiency upon
mission and hopefully something else.
The configuration is standard rb
DIR.
Right Side
The right post reg has a long hose
for OC donation and the wing
inflation.
Also drives the back gas injection
to Rb.
Primary O2 sensors gauge is on
right wrist and the HUD on BOV.
Back gas injector button is on the
switchblock and clipped on right
chest "d" ring, counterlung on left.
HUD / back up Po2 gauge are
clipped on the left chest Dring.
Left Side
The back gas SPG and balanced
BOV comes from the left regulator
post, as if the shock cord from
back up regulator had become the
breathing hoses from the rb.(The
switch from rb to OC is without
mouthpiece exchange)
If ever not driving rb from stage,
you should have a second back up
drive hose in this side reg.
The O2 injector block goes clip to
left chest "d" ring.
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