Check Function Of The Control Module, Power Module, Hud And Primary Low Pressure Warning Device - MSA G1 SCBA Operating Manual

(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.
5.3 Check Function of the Control Module, Power Module, HUD and Primary Low Pressure Warn-
ing Device
WARNING!
DO NOT disconnect the coupling nut when pressure is shown on analog pressure gauge. Release all
pressure from the SCBA by opening the regulator bypass valve or pressing the purge button.
Removing the coupling nut while the SCBA is pressurized can result in serious personal injury, death,
or damage to equipment.
SCBAs with integrated PASS:
To make sure that all lights are visible for these checks, align the control module, regulator and SCBA
as shown below.
When testing the control module, check if the graphical display and the analog gauge are consistent
within 5% of the full cylinder pressure (110 psig for 2216 psig system, 225 psig for 4500 psig system,
275 psig for 5500 psig system).
Both reset buttons on the control module have the same function. Use one when resetting the motion
alarm and the other when testing the manual alarm.
Verify proper function of the HUD, control module, power module, and low pressure warning device
by observing the control module gauge and display when the alarms sound. Perform this test with a
full cylinder.
G1 SCBA
Functional Tests
28
US