19
FINAL TESTING
Subjective Test
2.
Press the front cover (46) two times for about five seconds
each, with a five second pause between each purge. Ensure
no leaks can be heard coming from the second stage. If a
leak is detected, refer to
Table 2 : Troubleshooting Guide
section of this manual to determine its possible cause.
3.
Perform a subjective breathing test to ensure the second
stage is operating properly using the following procedure:
a.
Fully depress the front cover (46) to ensure an adequate
volume of air passes through the second stage to clear out
any water.
b.
Inhale slowly but deeply from the second stage. A prop-
erly serviced and adjusted regulator should deliver air
upon deep inhalation without excessive inhalation effort,
free-flow or fluttering of the second stage diaphragm (47).
When exhaling, there should be no fluttering or sticking of
the exhalation valve (63). If any of these problems occur,
refer to
Table 1 & 2: Troubleshooting Guides
section of
this manual
to determine its possible cause.
WARNING:
It is very critical to ensure that no leakage
is present and the SEA has met all requirements in
the Final Testing section of this manual. DO NOT
issue a SEA which exhibits any signs of leakage or
unsatisfactory performance until the problem has
been thoroughly diagnosed and repairs have been
made as needed, including the possible replacement
of a damaged component or subassembly.
WARNING:
Compressed air can be highly explosive
and is dangerous if misused. Ensure the cylinder
valve is opened slowly. Use eye and ear personal
protective equipment when performing any tests
involving compressed air.
1.
Slowly open the handwheel (26) to pressurize the
system. Check the dial indicator gauge (14) reads 3000
PSI (207 BAR).
1.
Ensure the handwheel (26) is in the open position and the
system is pressurized. Check the dial indicator gauge (14)
reads 3000 PSI (207 BAR).
Immersion Test
NOTE: Do not confuse bubbles from trapped air with a
true leak. If a true leak is detected, bubbles will come
out in a constant stream.
1.
Ensure the system is pressurized with the handwheel
(26) in the open position. Check the dial indicator gauge
(14) reads 3000 PSI (207 BAR). Set the unit in a stable
temperature environment for a minimum of
twelve hours.
After the time has elapsed, check the dial indicator gauge
(14) reads 3000 PSI (207 BAR).
Pressure Drop Test
WARNING:
If the dial indicator gauge does not read
"3000 PSI / 207 BAR" after 12 hours, refer to Table 1
& 2: Troubleshooting Guides section of this manual
to determine its possible cause.
NOTE: The SEA must be cleaned and sanitized as per
local instructions before issue.
3.
Upon completion of the immersion test, ensure all water
is removed from the unit. Wipe the entire system dry with a
clean towel. Press the front cover (46) to blow any remaining
water out of the second stage.
3.
Providing the SEA has passed all testing and the cylinder
has been filled to its full capacity as marked, the SEA is now
ready for use.
2.
Submerge the entire system in a test tank of clean water.
Shake the unit to remove trapped bubbles. Observe any bubbles
rising from the submerged system over a
five minute
period.
The recommended time is necessary due to slower bubble
formation that occurs in smaller leaks. Bubbles indicate a leak,
which requires the system to be disassembled at the source to
check sealing surfaces, assembly sequence and component
positioning in order to correct the problem. If a leak is detected,
refer to
Table 1 & 2: Troubleshooting Guides
section of this
manual
to determine its possible cause.
2.
Refill the cylinder to its full capacity as marked. Close the
handwheel (26) when filling is complete and depressurize the
system. Screw the fill port cap (31) back into the fill port (32).
