Podcast
Questions and Answers
What color indicates a pressure level between 50% and 100%?
What color indicates a pressure level between 50% and 100%?
- Green (correct)
- Red
- Yellow
- Blue
Which segment corresponds to a pressure range of 0% to 35%?
Which segment corresponds to a pressure range of 0% to 35%?
- Segment 2
- Segment 1
- Segment 3
- Segment 4 (correct)
What is the pressure display for a range of 50% to 100%?
What is the pressure display for a range of 50% to 100%?
- 1500 PSI
- 1450 PSI
- 1400 PSI
- 1425 PSI (correct)
What does a yellow color signify in the pressure status?
What does a yellow color signify in the pressure status?
How many segments are used to indicate pressure levels on the HUD?
How many segments are used to indicate pressure levels on the HUD?
What does the logo screen display when the PASS device is activated?
What does the logo screen display when the PASS device is activated?
What does the buddy light indication cycle through during the start-up sequence?
What does the buddy light indication cycle through during the start-up sequence?
Which icon indicates that the SCBA should be removed from service after use?
Which icon indicates that the SCBA should be removed from service after use?
What happens if the SCBA should not be used?
What happens if the SCBA should not be used?
What may cause the actual time remaining to be less than the calculated time displayed?
What may cause the actual time remaining to be less than the calculated time displayed?
How is the time displayed on the primary screen calculated?
How is the time displayed on the primary screen calculated?
What does the primary screen's countdown timer indicate?
What does the primary screen's countdown timer indicate?
How can the secondary screen be accessed?
How can the secondary screen be accessed?
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Study Notes
Start-up Sequence
- PASS device initiates a start-up sequence from sleep mode, communicating SCBA state to the control module.
- Displays the MSA logo, unit number, and assigned riding position on the logo screen.
- Buddy lights on power and control modules sequence through red, yellow, and green colors.
- A start-up tone is played by the power module during activation.
- Conducts a self-test to verify operational status; results displayed on the self-test screen.
- Successful self-test shows a "Go" icon, indicating SCBA readiness for service.
- An overhaul reminder icon indicates the need for maintenance; SCBA should be removed from service.
- A Hardware Alarm icon signifies the SCBA is not operable; full alarm activation prevents further operation until addressed.
Primary Screen
- Displays critical user information, including calculated remaining service time for SCBA.
- Countdown timer reflects estimated rated service pressure until it reaches 35%, based on Air Management Guidelines.
- Actual remaining air time may vary due to breathing rate fluctuations; use the time indicator as a general guideline.
- Time display is calculated from the average breathing rate over the last three minutes, which may drop under increased demand.
Secondary Screen
- Accessible via a single press of the green button, showing additional operational details:
- Temperature Gauge
- Bluetooth Connectivity
- Long Range Radio Icon
- Battery Status
- Pressure levels displayed using a color-coded system:
| PRESSURE | COLOR | DISPLAY |
|---|---|---|
| 50 - 100% | Green | 1425$5.75_{PSI}$ |
| 36 - 49% | Yellow | |
| 0 - 35% | Red |
HUD Pressure Status
- HUD conveys pressure and alarm status through light pipes inside the facepiece, with pressure on the right and alarm on the left.
- The pressure indicators are segmented into four ranges, represented by specific LED colors:
| SEGMENT | PRESSURE RANGE | HUD LED |
|---|---|---|
| Segment 1 | 75 - 100% | ooooooo |
| Segment 2 | 50 - 74% | ooâ—‹â—‹â—‹â—‹â—‹ |
| Segment 3 | 36 - 49% | â—‹â—‹â—‹â—‹â—‹â—‹ |
| Segment 4 | 0 - 35% | â—‹â—‹â—‹â—‹â—‹â—‹ |
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