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XS Scuba Inspire Regulator Service Manual
This concludes reassembly
Adjusting and Testing
NOTE: Prior to adjusting, understand that this
design uses the crown orifice to set the lever height
only. CW lowers the lever, CCW raises the lever. The
adjustment knob (26) changes the breathing resistance,
CW increases breathing resistance, CCW decreases
breathing resistance.
1. Using a Flow Bench
A. Connect the regulator to a calibrated test bench
and pressurize to 3000 psi / 207 bar.
B. Turn the adjustment knob (26) CCW, all the way
out. If the regulator leaks, turn in the crown orifice
(13) until the leak stops and then continue CW for
1/8th turn.
C. Slowly open the vacuum control knob while
watching both the magnehelic gauge and the
medium pressure gauge.
D. When the medium pressure begins to drop,
indicating that the second stage valve has opened,
the magnehelic gauge should read b1.0 to
+1.4” H2O / 2.5 – 3.5 mbar
2. Flow Bench Not Available
A. Lower the second stage diaphragm first into a
container of water with the mouthpiece up. Keep
the diaphragm perfectly horizontal. Place your
ear close to the mouthpiece. You should hear the
demand valve open, indicated by hissing air, when
the diaphragm is approximately 1 inch deep. If not,
be sure that the adjustment knob is turned all the
way out.
3. Vacuum Test
A. Do not pressurize the regulator in this step
B. Plug the mouthpiece
C. Immerse the second stage into water so it is at
least 3 in / 8 cm deep
D. Look inside the mouthpiece with a light. The
internal cavity should be dry. If the internal cavity is
wet, consult the troubleshooting table.
4. External Leak Test
A. Pressurize the second stage with medium
pressure air (130 – 145 psi / 9-10 bar)
B. Submerge the second stage in a container of
clean water.
C. Observe any bubbles arising from the
submerged second stage over a one minute
period. One minute is required due to bubble
formation that occurs in smaller leaks. Bubbles
indicate a leak, which requires that the regulator
go through troubleshooting to correct the problem
NOTE: Do not confuse bubbles from trapped
air with a true leak. If there is an air leak, bubbles
will come out in a constant stream
5. Install the mouthpiece (3)
9E
2A
5A
