Functional Checks; Functional Tests - MSA AirHawk II Manual De Instrucciones

FUNCTIONAL CHECKS

(AFTER EACH USE AND MONTHLY)
1. Check that the regulator works properly. The regulator
outlet should be sanitized before and after testing.
a. Check that the cylinder valve and buttons are
closed and that the system is not pressurized.
b. Gently inhale through the regulator outlet and hold
your breath for about 10 seconds. If the negative
pressure is maintained, there is no leakage.
c. Gently exhale through the regulator outlet for about
10 seconds. If the positive pressure is maintained,
there is no leakage.
d. Do not use the apparatus if airflow through the
regulator is detected in either test. Return the
regulator to a certified repairperson.
2. Inspect the buttons and bypass valve.
a. With the regulator pressurized, operate each valve
to be sure it operates. Venting of pressure relief
valves (or a continuing flow of air through the
regulator when the user is not inhaling) indicates
that the regulator needs to be repaired.
b. Listen to the regulator. Any unusual sounds such as
whistling, chattering, clicking, or rattling mean that
the regulator should be checked further.
c. If any of these symptoms occur, the apparatus must
be removed from service. Return the regulator to a
certified repairperson.
3. Audi-Larm Audible Alarm
a. Check the function of the audible warning device
by observing the regulator gauge pressure at which
the alarms sounds. Perform this test with a
minimum cylinder pressure of 1,200 psig for the
Low Pressure Air Mask, and 2,000 psig for the High
Pressure Air Mask.

FUNCTIONAL TESTS

b. Pressurize the system by opening the cylinder valve
c. Open bypass slowly.
d. Watch the drop in pressure on the shoulder gauge
e. The alarm must continue until the air pressure is
Do not disconnect the regulator coupling nut when
pressure is shown on the regulator gauge. Release all
pressure from the regulator by opening the bypass
valve. Removing the coupling nut with the regulator
pressurized may result in serious personal injury,
death, or damage to equipment.
f. Open the bypass valve slowly to release trapped air.
g. Unscrew the regulator coupling nut from the
h. Inspect the coupling nut for thread damage. Also be
i. Replace the O-ring if it is damaged.
17
for a moment, then close it. The alarm must sound
indicating it is functioning.
and the point at which the whistle must begin to
sound. Nominal gauge readings at which the alarm
starts to sound are listed below.
550 psig approximately (low pressure system)
1125 psig approximately (high pressure system)
approximately 200 psig or less. If the whistle does
not function properly, the apparatus must be
removed from service.
Close bypass valve.
cylinder valve. It is hand-tight and should not
require tools.
sure there is an O-ring and that it is not damaged.
TAL 1211 (L) Rev. 4 - 10088650