Gravity Zero MK II - Pre-Dive Preparation; Oxygen Cylinder Checks

MK II - Figure 5, Functional Diagram
5. PRE-DIVE PREPARATION
Before every dive with the rebreather MK II it is necessary to check the following points:
Checks and Refills Oxygen Cylinder.
Open the shut-off valve and verify the pressure value on the gauge; If the pressure value is less than 190 bar
refill the cylinder with pure oxygen as follows:
Warning: open slowly the shut-off valve; the high pressure oxygen flow may
burn or explode
 close the shut-off valve
 push down the bypass button to assure that the pressure discharge (make sure that high pressure gauge
indicates zero).
MK II Oxygen Rebreather User Manual - Revision 01/2018 - Copyrights : Dr Fabrizio Pirrello © 2001- 2018