Aqua Lung CALYPSO FIRST STAGE 기술 유지보수 매뉴얼 - 페이지 8

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CHECKING THE MEDIUM PRESSURE

Attach an MP test gauge (0-400 psig) to a medium pressure

hose and thread the hose into the open MP port. If your

test gauge does not have an over-pressure relief valve, you

must also attach a properly adjusted second stage to the

first stage to act as the relief valve in case of a HP leak.

Attach the first stage to

a cylinder charged to

2900-3000 psi. Slowly

open the cylinder valve

to pressurize the regula-

tor.

WARNING:

If the pressure gauge rapidly exceeds

145 psi, then there is a HP leak. Quickly close

the cylinder valve and purge the regulator. Fail-

ure to do so may cause a rupture to the MP hose

and/or the MP gauge which, in turn, can lead to

personal injury. Refer to Table 1. Troubleshooting

Guide for the causes of HP leaks.

With the regulator under pressure, cycle the over-pressure

relief valve or the second stage purge button to produce an

airflow.

Check the MP reading, which should be between 130 and

145 psi.

Leave the regulator under pressure for about 10 seconds–

the MP should remain stable and should not rise by more

than 5 psi. If the MP rises more than 5psi, this indicates that

there is a leak. Refer to Table 1. Troubleshooting Guide.

IMMERSION TEST

With the port plugs and

at least one properly

adjusted second stage

installed, slowly open

the cylinder valve and

pressurize the first

stage. Completely sub-

merge the first stage in

fresh water and check

for leaks.

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 sream.

Assuming there are no leaks, close the cylinder valve and

depressurize the regulator. Remove the first stage from the valve

and secure the dust cap in place with the yoke screw.

If a leak is detected, note the source of the leak and refer to

Table 1. Troubleshooting Guide for possible causes and

corrective actions.