Oceanic ALPHA 8 - Final Tuning and Testing; First Stage Testing; Tuning the Alpha 8

REGULATORS
ALPHA 8 SECOND STAGE
© 2002 Design, 2005
OCEANIC ® Product Service Guide
Doc. 12-2805-r02 (8/19/10)
PG-8
FINAL TUNING AND TESTING
FIRST STAGE TESTING
1. Perform the Leak Detection Test specified in the Initial Inspection
Procedure (Doc. No. 12-2202).
NOTE: Refer to the Trouble Shooting section to determine
the possible cause and treatment of any air leaks that may be
found.
2. Connect the ALPHA 8 Second Stage Low Pressure Hose to a
Low Pressure Port of the First Stage. Ensure that all other Ports
are sealed with Port Plugs, with the exception of an additional
Low Pressure Quick Disconnect Hose.
3. Connect a recently calibrated low pressure test gauge to the
additional low pressure hose, and connect the first stage to a
pure breathing gas source of 3,000 PSI (206 BAR).
4. Slowly open the valve to pressurize the Regulator, and check the
test gauge to ensure that the Intermediate Pressure is set as
recommended in the specifications for the First Stage being
used.
NOTE: If the Intermediate Pressure is found to be other than
recommended, refer to that Regulator's troubleshooting
section to determine possible cause and treatment.
TUNING THE ALPHA 8
1. Prior to tuning the ALPHA 8, check the following items:
a. The demand DIAPHRAGM (15), FRONT COVER (16) and
COVER RING (17) should be properly installed into the HOUS-
ING (8), with the Front COVER RING tightened until secure.
b. Connect an In-Line Adjustment Tool between the Low Pressure
Hose and INLET COUPLING (3).
c. The MOUTHPIECE (18) should be cleaned and disinfected with
warm, soapy water.
NOTE: While pressurized, the slotted blade of the In-Line
Tool will be held away from the ORIFICE (2) and will therefore
need to be pushed inward and held while turning the ORI-
FICE in either direction. Locate the Slotted Head of the
ORIFICE by touch before attempting any adjustment.
Clockwise turns of the In-Line Adjustment Tool turns the ORI-
FICE (2) in toward the POPPET SEAT (5) increasing the Open-
ing Effort.
Counter clockwise turns of the In-Line Adjustment Tool turns the
ORIFICE (2) out away from the POPPET SEAT (5) reducing the
Opening Effort.