© Copyright 2003-2019 Dive Lab® Inc. All rights reserve .
This Gui e is ma e available for the express use of owners an users of the Dive Lab XLDS systems.
This information is subject to perio ic up ates an changes. Always check the Dive Lab web site for the latest versions.
Document XLDS Gui e – Section Two
Revise July 17, 2019
SECTION TWO: CONCEPT AND INTENDED USE
Intermediate Surface Supply
Concept
XLDS operates as an interme iate compensate
system. The XLDS system uses a specially
esigne 1/4" main gas umbilical assembly, that
re uces the weight an bulk of the umbilicals to
approximately half that of the lightest assemblies
normally use for surface supply iving. The
umbilicals are supplie air from the console, at
pressures between 350-375 PSIG (24-26 bar), to a
volume compensate pressure control system,
worn by the iver, known as the iver worn
interme iate manifol compensating regulator
system (ICS). The manifol is integrate with a 0.8
liter accumulator an manifol regulator system,
which re uces high velocity me ium pressure
breathing air (350 PSIG), from the umbilical, to
between 150-170 PSIG an supplies it to the
helmet or full face mask being use .
During inhalation, the ICS elivers breathing air to
the eman helmet or full-face mask with
minimal pressure rop, allowing for low
inhalation effort. During the exhalation cycle, the
system quickly buil s pressure for the next
inhalation cycle. Breathing performance of the
system allows breathing rates of up to 90 RMV to
epths of 100 FSW, an up to 75 RMV to epths
of 132 FSW, with most mo el KMDSI helmets an
ban masks, an at 75 RMV to 165 FSW when
using the KMDSI EXO- 26 BR. Both the positive
an non-positive pressure AGA
TM
FFM,
can be
use at work rates of 75 RMV, to epths of 150
FSW.
Conventional Surface Supplied
Diving
The surface air control consoles (RDC-2 an RDC-
3) can also be use as conventional air control
console, for eman mo e surface supplie
iving, with eman mo e Helmets an Masks.
When reference to conventional surface supplie
iving is given, it refers to the RDC-2 or RDC-3
console use with stan ar umbilicals an over
bottom tracking of supply pressures, no more
than 200-250 PSIG OB. When the RDC-2 or RDC-3
consoles are use for conventional air iving,
supply pressure can be regulate to each iver,
IAW the operational pressure an supply
requirements, ictate by the UBA being use ,
an IAW the recommen e performance
specifications as outline in this user gui e.
When using with conventional 3/8” umbilicals,
the RDC relief valves, shoul be reset to relieve
between 290-300 psig, verse the 390-400 psig
setting, when using with the XLDS system.
Currently the RDC-2 an RDC-3, are certifie by
Dive Lab, for use with all properly maintaine
current pro uction mo els of KMDSI Ban Masks,
Helmets, an Full Face Masks properly configure
for conventional surface supplie iving. Other
equipment may be use , contact Dive Lab for
a itional information.
