Aqua Lung Calypso Maintenance Manual - Page 11

Browse online or download pdf Maintenance Manual for Diving Instrument Aqua Lung Calypso. Aqua Lung Calypso 20 pages. Second stage
Also for Aqua Lung Calypso: Technical Bulletin (4 pages), Service Manual (19 pages), User Manual (20 pages)

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1. Disassembly Procedures

Calypso/Titan Second Stage Service Manual

Make sure that the cover is seated evenly all the way around

NOTE:

If your facility is equipped with a test bench,

perform the tests before installing the mouthpiece. General

instructions for performing bench tests are located in the

next section, "Final Testing."

26.

If equipped with a

Comfo-bite mouthpiece,

make sure the 'bridge'

of the mouthpiece (6) is

facing upward. Stretch

the mouthpiece over the

second-stage mouth-

piece boss. At the base

of the mouthpiece is a

groove for the reusable

clamp (5). Wrap the clamp around the mouthpiece so that

the cam buckle points toward the hose and the cam lever

points downward. Mate the cam lever hook with the hook

on the free end of the clamp. Press down on the cam lever

until the buckle snaps closed.

27.

Attach the MP hose (25)

to the second stage.

Using an 11/16

(17mm)

crow's foot, apply a

torque of 40 (± 3) in. lbs.

NOTE:

Before performing the following procedure, refer

to Table 5, titled Test Bench Specifications – Calypso 2

Stage.

NOTE:

If an accurately calibrated airflow test bench is not

available, proceed to the Subjective Tuning Procedures

provided on the following page.

This ends reassembly of the

Calypso/Titan Second Stage

FINAL TESTING PROCEDURES

Second Stage Air Flow Test

Connect the first stage regulator to a calibrated test bench

and pressurize the system to 3000 (±100) psi.

Place the second stage mouthpiece over the mouthpiece

adapter. Slowly turn the flowmeter control knob until

the flow reaches a minimum of 14 SCFM (400 liters per

minute). The reading on the Magnahelic gauge (inhalation

/ exhalation effort gauge) should indicate no more than

+6.O" H2O. If the reading exceeds +6.0" H2O, refer to Table

1 - Troubleshooting for corrective guidelines and specific

procedures.

Second Stage Opening Effort Test

Turn the flowmeter control knob shut, and then slowly

reopen while watching both the Magnahelic gauge and the

intermediate pressure gauge.

When the intermediate pressure gauge begins to drop

below the intermediate pressure "lockup," the Magnahelic

gauge should indicate an opening effort of +0.8 to +1.4 inch

of H2O for a primary second stage and +1.2 to +1.8 inch of

H2O for the octopus. If the opening effort is not within this

range, refer to Table 1 - Troubleshooting.

Second Stage Purge Flow Test

Turn off the flowmeter control knob. Next, while the second

stage is still mounted on the mouthpiece adapter, watch

the flowmeter gauge and depress the purge button until

the second stage valve is completely open. The flowmeter

gauge must indicate a minimum of +12 SCFM. If the purge

flow is less than +12 SCFM, refer to Table 1 - Troubleshoot-

ing.

When purge flow is correct, remove the second-stage from

the mouthpiece adapter on the flow test bench. Shut the

valve of the test bench, and purge the second stage to

depressurize the system. Remove the regulator.

External Leak Test

After disconnecting the regulator from the flow bench, con-

nect it to a scuba cylinder filled to approximately 3,000 psi.

Open the cylinder valve to pressurize the regulator, and

submerge the entire system in a test tank of clean water.