21
Functional Tests
G1 Industrial SCBA
US
5.2
Check Function of Regulator
(1) Push the release buttons on the regulator to ensure the regulator is shut off.
(2) Ensure that the bypass knob is fully closed (clockwise).
(3) Open the cylinder valve and ensure the valve is completely open.
(4) Open the bypass knob (counterclockwise).
(5) Ensure that air flows from the regulator.
(6) Close the bypass knob (clockwise).
(7) Attach the regulator to the facepiece.
(8) Ensure proper attachment by pulling on the regulator.
(9) Don the facepiece or hold the facepiece against the face to create an effective seal.
(10) Inhale sharply to start air flow.
(11) Breathe normally.
a) Ensure proper regulator response.
b) The regulator should NOT make any unusual sounds including whistling, chattering, or
popping
(12) Remove the facepiece from the face.
(13) Ensure that air flows freely.
(14) Push the regulator release buttons.
a) Ensure that air flow stops.
If the regulator does not function properly, the SCBA must be removed from service.
5.3
Check Function of the Low Pressure Warning Device
(1) Pressurize the system by opening the cylinder valve; first slowly and then normally.
a) Listen for the bell alarm to activate momentarily during pressurization.
(2) Close the cylinder valve completely.
(3) Slowly open the regulator bypass valve (counter clockwise) to vent the pressure until the remote
pressure gauge reading drops below the following values:
554 psi - 2216 psi system
1125 psi - 4500 psi system
The bell alarm should start to ring when air pressure drops below the above values and continue
to ring until air pressure is 290 psi or less.
(4) Further open the bypass valve to vent any remaining pressure in the system.
(5) Close the bypass valve (clockwise).
If the bell alarm does not function properly, the SCBA must be removed from service.
