Aqua Lung Micra Air System User Manual page 17

4. While holding the first-stage secure, slowly turn the
M.A.S. cylinder counter-clockwise until a single click is
felt and the indicator pin can be sighted through the
"ON" aperture.
CAUTION: DO NOT attempt to open the M.A.S. valve with-
out first checking to ensure that the LP hose and pressure
gauge assembly are securely fastened to the first-stage.
5. Closely examine the pressure gauge dial
face to determine that the M.A.S. cylinder
is full. (See Fig. 12.) If the gauge does
not register at least 2,500 psi, repeat the
filling procedure using a supply cylinder
that is filled to 3,000 psi.
6. Immerse the M.A.S. in water to check for
any signs of freeflow from the second-
stage, or leakage from the hose, pressure gauge, safety
disc assembly, first-stage, or cylinder neck. If leakage is
found, do not attempt to use the M.A.S. until it has
received service from an Authorized Aqua Lung Dealer.
NOTE: If the second-stage purge was checked during the
filling procedure, it is not necessary to repeat steps 7 & 8.
7. Briefly depress the purge button to ensure that sufficient
airflow is provided to clear the second-stage of water.
8. Immediately after releasing the purge button, listen
closely to ensure that the second-stage does not continue
to flow any air.
Provided that these pre-dive inspection requirements have
all been met, the M.A.S. is now ready for use. Refer to the
next section, titled Mounting Options, to determine which
mounting position may be most compatible with your diving
activities and personal equipment.
CAUTION: DO NOT enter the water or dive with the M.A.S.
valve turned to the "OFF" position. Doing so will delay ac-
cess to it in an out-of-air situation, and may also allow the
entrance of moisture through the second-stage.
Micra Air System Owner's Manual 17
Aqua Lung International, Inc.
Fig. 12 -
"Full" Indication