Table of Contents
Advertisement
20
6
Place the end of the TX Lever Height Tool onto the purge
button (5) with the "GAS FLOW" up. Depress the purge but-
ton by pushing the tool towards the second stage until it stops
against the front cover. If air flows from the second stage the
lever height has been set correctly. If air does not flow from the
valve, proceed to step 7.
GAS
FLOW
7
Using the in-line adjustment tool, turn the seat (18) counter-
clockwise approximately 1/16 of a turn. Repeat from step 4.
2nd Stage Opening Effort Test
1
With the regulator still pressurized, slowly open the flowmeter
control knob (start vacuum) while watching both the magne-
helic gauge and the MP gauge.
2
When the MP begins to drop, indicating the second stage
valve is open, the magnehelic gauge should indicate an open-
ing effort of +1.0 to +1.5 in-H
outside of these specifications, reference Table 1, Troubleshoot-
ing Guide (pg 22) for corrective actions.
FINAL ASSEMBLY
1
Depressurize the regulator
and remove the in-line ad-
justment tool from the MP hose
and the second stage. Thread
the MP hose onto the second
stage. While holding the heat
exchanger (2) stationary with
an 11/16" open end wrench.
Use an in-lb torque wrench and
a 11/16" crow-foot to torque the
hose to 45 in-lbs (5 Nm).
2
If equipped with a comfo-
bite mouthpiece (14),
make sure the 'bridge' of the
mouthpiece is facing upward.
Install the mouthpiece over the
outlet port of the case (10).
Install the mouthpiece clamp
(13) in the groove so that the
buckle points toward the hose.
Tighten the clamp and snip the
excess with side cutters.
WARNING:
Ensure that the mouthpiece is properly secured
on the oral boss.
O (2.5-3.7 mbar) If the reading is
2
FINAL TESTING PROCEDURES
External Leak Test
1
After disconnecting the regulator from the test bench, con-
nect it to a scuba cylinder filled to approximately 3000 psi
(206 bar). Open the cylinder valve to pressurize the regulator and
submerge the entire system in a test tank of clean water.
2
Observe any bubbles arising from the submerged regulator over
a one minute period. The recommended time is necessary due
to slower bubble formation that occurs in smaller leaks. Bubbles
indicate a leak, this would require the system to be disassembled
at the source to check sealing surfaces, assembly sequence and
component positioning in order to correct the problem(s).
NOTE:
Extremely small leaks may be better detected by ap-
plying a soap solution or Snoop™ to the leak area. Bubble
streams will indicate the source of the leak. Before disassem-
bling to correct any leaks, rinse the entire regulator thoroughly
with fresh water and blow out all residual moisture with fil-
tered, low-pressure air. Disassemble and remedy the problem,
referring to Table 1: Troubleshooting Guide, p. 22.
Subjective Breathing Test
1
Depress the second stage purge to ensure that the
volume of airflow is adequate to clear the second stage.
2
Breathe deeply from the mouthpiece. A properly serviced and
adjusted regulator should deliver a smooth, uninterrupted
airflow upon deep inhalation; without excessive effort,
hesitation, or freeflow. If any abnormalities or problems occur,
refer to Table 1: Troubleshooting Guide, p. 22.
3
When completed, close the cylinder valve and depressur-
ize the regulator. Remove the first stage from the valve and
secure the dust cap in place.
4
Sterilize the regulator IAW local instructions prior to issue.
THIS CONCLUDES THE SERVICE
PROCEDURES FOR THE TX50
SECOND STAGE REGULATOR
TX50 Technical Manual
Hide quick links:
Advertisement
Table of Contents
