MSA G1 SCBA Functional Tests PDF

MSA G1 SCBA Functional Tests Daily and after each use NOTE: Conduct functional tests after the SCBA has passed visual inspections successfully. Functional checks must be conducted using a full cylinder. Before starting the tests, check the pressure gauge on the cylinder valve to verify that the cyli...

MSA G1 SCBA Functional Tests Daily and after each use NOTE: Conduct functional tests after the SCBA has passed visual inspections successfully. Functional checks must be conducted using a full cylinder. Before starting the tests, check the pressure gauge on the cylinder valve to verify that the cylinder is full.  Check that the Regulator and Facepiece  Can Hold Negative Pressure 1. Close the cylinder valve and purge any air from the system using the bypass knob or the purge cover on the regulator. 2. Hold the facepiece against the face to create an effective seal. 3. Attach the regulator to the facepiece and inhale until the facepiece begins to collapse against the face. 4. Hold your breath for approximately 10 seconds. Negative pressure should be maintained and the facepiece should remain collapsed against the face for the entire 10 seconds.  Check Function of Control Module, Power Module,  HUD, and Primary Low Pressure Warning Device When testing the control module, place the control module down flat to check the white light illuminating the pressure gauge, and check to ensure that the graphical display and analog gauge are consistent within a 5% range (110/2216 psi, 225/4500 psi) with the cylinder pressure. 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 alarms sound. Perform this test using a full cylinder. 5. Do not use the SCBA if negative pressure cannot be maintained in the facepiece.  Check Function of Regulator  1. Push the release buttons on the side of the regulator to ensure that the regulator is shut off. 2. If the regulator is equipped with a bypass valve, ensure that the bypass knob is fully closed (clockwise). 3. Completely open the cylinder valve (counterclockwise). 4. Observe the LED display. LEDs must illuminate in a sequenced pattern. After the sequence is completed, the corresponding system pressure will display on the control module. 5. Open the bypass knob (counterclockwise). Ensure that air flows from the regulator. 1. Pressurize the system by fully opening the cylinder valve. Observe the starting sequence of LEDs on the regulator. Listen for the power module to sound and for the primary low pressure warning alarm to sound briefly. Ensure that buddy lights flash green. Ensure that the pressure gauge and LCD display (if configured) show the correct pressure. 2. Allow the control module to remain motionless for approximately 20 seconds. Listen for the power module to sound repeated tones of the PASS pre-alarm. Verify that buddy lights flash red. Verify that the red LED flashes in the HUD. 3. Shake the control module to reset the alarm before the unit goes into full alarm. 4. Allow the control module to remain motionless until the full alarm sounds (30 seconds). Listen for the power module to sound tones of the PASS full alarm. 6. Close the bypass knob (clockwise). Verify that buddy lights flash red. 7. Inspect the second stage regulator hose while the unit is pressurized. Remove from service if the hose exhibits bulging, deterioration, dirty O-rings or seals, cracks, debris, tears, holes, stickiness, signs of heat or chemical-related damage, or other visible signs of damage. Verify that the red LED displays in the HUD. 8. Attach the regulator to the facepiece. 9. Ensure proper attachment by pulling on the regulator. 10. Don the facepiece or hold the facepiece against the face to create an effective seal. Verify that shaking the control module does not reset the full alarm. 5. Reset the PASS alarm by pressing the reset button on the left side of the control module twice within approximately one second. 6. To check manual activation of the PASS alarm, press and hold the alarm button on the front of the control module until the alarm activates. 11. Inhale sharply to start air flow. Listen for the power module to sound tones of the PASS full alarm. 12. Breathe normally. Verify that buddy lights flash red. Ensure proper regulator response. The regulator should NOT make any unusual sounds such as whistling, chattering or popping 13. Remove the facepiece from the face. 14. Ensure that air flows freely. 15. Push the regulator release buttons. Ensure that air flow stops.   Check Speaker Module Function Verify that the red LED displays in the HUD. 7. Reset the PASS alarm by pressing the reset button on the right side of the control module two times within approximately one second. 8. Close the cylinder valve fully. 9. Slowly open the bypass valve; keep purge pressed on the regulator to vent pressure until the control module pressure reading drops below the following values: 775 psi — approximately (2216 psi system). 1575 psi — approximately (4500 psi system). 1. Pressurize the system and ensure that the PASS device and HUD are activated. 10. A flashing red LED must display in the HUD at the appropriate pressure. The primary low pressure warning device should alarm, all buddy lights should flash red and the RIT light should illuminate. Alarms should continue until air pressure is 200 psi or less. 2. Don a facepiece, attach the regulator and begin to inhale sharply to breathe air from the system. This action activates the regulator and starts voice amplification. 11. When system pressure falls below 200 psi, turn the control module off (sleep mode) by pressing the reset button (green) two times within approximately one second. 3. Talk into the facepiece to ensure that the speaker module is operating properly. 12. Open the bypass valve slowly; keep purge pressed to release any remaining pressure in the system. 4. Press and hold the ON/OFF button on the speaker module until the audible tone sounds and the unit turns OFF. 13. Close the bypass valve/release purge. LED on the speaker module should be OFF. 5. Press and hold the ON/OFF button on the speaker module until the audible tone sounds and the unit turns ON. If the SCBA does not function properly for all tests described above, it must be removed from service and the condition checked and corrected by an MSA trained and certified repair person before using. Failure to follow these warnings can result in serious personal injury or death. This information provides only a summary of SCBA functional test procedures. Refer to the G1 SCBA Operating Manual for complete functional test requirements. ! 0105-197-MC / 06.2022 © MSA 2022