Questions and Answers
What intermediate pressure does the pressure reducer reduce the cylinder pressure to?
What activates the relief valve in the pressure reducer?
What does the power module emit to notify users about low battery levels?
How is the pressure reducer connected to the cylinder?
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What feature does the power module have to assist in low visibility?
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What is displayed on the control module to provide vital information?
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What type of cells are found in the rechargeable battery module?
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What activates the Safety Pin in the pressure reducer?
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What happens when the PASS device detects no movement for 30 seconds?
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How long does the MSA G1 battery supply last on a full charge?
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How can the battery status be checked?
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Which component of the PASS device is responsible for monitoring movement?
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What happens to the speaker module during inhalation?
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How long does it take to fully charge the lithium-ion battery?
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Study Notes
G1 Pressure Reducer
- Reduces cylinder pressure to an intermediate level of 115 PSI for user respiration.
- Features a fail-safe design to ensure airflow even during malfunctions.
- Relief valve activates when pressure reaches 200-250 PSI.
- Connects to the cylinder with a handwheel assembly and Quick Connect fitting.
- To disconnect, twist 1/4 turn and pull; to lock, push directly into place.
- Contains an intermediate pressure relief valve and a sintered filter to trap particles.
- Safety Pin mechanism activates when the cylinder is turned on to prevent accidental disconnection.
G1 Power Module
- Acts as the power supply for the SCBA, control module, regulator, and speaker module.
- Connected to the backplate and features a rechargeable battery module with non-replaceable lithium-ion cells.
- Emits audible PASS alarms and pre-alarms, along with four buddy lights for alerts.
- Notifies users to recharge batteries via audible tones, empty battery icons, and flashing yellow LEDs.
- RIT light illuminates during low-pressure alarms for visibility in darkness.
- Equipped with a data logging feature to record SCBA information while active and includes an internal real-time clock.
G1 Control Module
- Serves as the user's interface with the SCBA and the PASS device.
- Assembled to the high-pressure air source and power module via pneumatic and electronic hose assembly.
- Features an analog gauge and a graphical display that shows vital information like estimated Time Remaining for the cylinder.
PASS Device
- Monitors user movement with an integrated motion sensor.
- Enters pre-alarm if motionless for 20 seconds; full alarm triggers after 30 seconds of inactivity.
- Continuously monitors cylinder pressure and battery status.
G1 Speaker Module
- Amplifies and clarifies voice from the facepiece during use.
- Breathing sounds are not amplified when inhaling.
- Can be activated/deactivated via a button, acknowledged by a beep, and turns off with the SCBA.
Battery
- Powered by a rechargeable Lithium-Ion battery, supporting all lights, communication, and controls.
- Delivers 6-8 hours of continuous operation with all features active.
- Battery status can be checked without turning on the SCBA by pressing green buttons for 3-5 seconds.
- Change the battery when the status indicates yellow, suggesting two hours of remaining power.
- Full charge time ranges from 4-6 hours, and a removal tool is located on the shoulder.
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Description
This quiz covers the parts and operation of a pressure reducer, including its fail-safe design and relief valve activation point. It also touches on the connection to the cylinder valve assembly.
