LP # 304A SCBA Flashcards
WHAT IS THE PURPOSE OF THE SCBA?
Those apparatus in which the wearer
carries their own air supply that is entirely
independent of the outside atmosphere
WHAT IS THE PURPOSE OF THE SCBA?
Those apparatus in which the wearer
carries their own air supply that is entirely
independent of the outside atmosphere
WHAT WILL THE SCBA NOT PROTECT WEARER AGAINGST?
- The SCBA will not provide protection
against gases, mists or vapors which are
skin absorptive (e.g. hydrocyanic acid
HOW IS THE SCBA DESIGNED?
It is designed to provide the wearer with
respiratory protection while working in
hazardous atmospheres. This unit may be
used for entry into and escape from toxic
or oxygen deficient areas
Which SCBA does the L.A.F.D. currently
utilize?
The L.A.F.D is currently using the new state of the art “WARRIOR” SCBA. It has a positive pressure, two-stage regulator with an IntelliPASS system and Buddy Breather Pouch with quick disconnect fitting and 39” hose.
WHAT ARE THE MAJOR COMPONENTS OF THE SCBA?
- Back pack and harness assembly
- Air Cylinder
- First stage regulator w/ alarm
- Second stage regulator
- Heads up display (HUD)
- Air pressure gauge w/PASS alarm
- Buddy breathing system (BBS)
- RIC/Universal air connection (UAC)
- Facepiece
- Voice progection unit (VPU)
- Last chance rescue filter
WHAT ARE THE RATINGS OF THE ATTACMENT POINTS ON THE BACKPACK HARNESS ASSEMBLY?
The backplate has three
integrated carrying handles with carabineer
attachment points. Each attachment point is
rated to 1,000 pounds. The air cylinder is
retained by a stainless steel band that
provides positive retention and requires two
independent actions to open.
WHAT SIZE CYLINDER DOES THE SCBA HOLD?
requires two
independent actions to open. The stainless
steel band has adjustment points that allow
for the use of 45-minute or 60-minute air
cylinders.
WHAT TYPE OF STRAPS ON THE BACKPACK HARNESS?
Designed for a secure, stable fit,
with weight concentrated at the hips, the
straps are made Kevlar and incorporate a
metal automotive-style waist buckle. The
waist straps adjust from both sides by pulling
on the yellow tabs keeping the SCBA
centered during donning.
WERE IS THE SECOND STAGE REGULATOR SECURED?
A regulator belt clip
is attached to the left side waist strap for
storage of the second stage regulator. The
regulator belt clip is designed to keep the
second stage regulator clean and secure until
it is attached to the facepiece.
WERE IS THE INTERMEDIATE PRESSURE HOSE LOCATED?
The intermediate pressure hose is routed over
the left shoulder and incorporates the
electrical/pneumatic connector. This
connection can only be made in the correct
orientation completing the air supply to the
second stage regulator and the electronics
required for the Heads-Up Display.
WERE IS THE BATTERY COMPARTMENT LOCATED?
Located on the lower right side of the
backpack is the battery compartment that
houses four C size batteries.
WHAT SUPPLIES THE SCBA OF POWER?
All electronics are supplied by these batteries except the Voice Amplifier. Amber LED’s on the PASS Device and the Backpack act as a battery
status indicator.
THE AMBER LIGHTS FLASH HOW OFTEN WHAT IS INDICATED?
The amber LED’s will flash
once every 10 seconds to indicate a usable
battery condition. The amber LED’s will flash
every 2 seconds to indicate a low battery
condition.
WHAT IS THE PURPOSE OF THE LED INFO LIGHTING?
A LED informational lighting component has
been added to the Warrior SCBA to allow the
user and surrounding crew members to
assess each unit’s status.
WERE IS THE LIGHTING INDICATORS LOCATED?
All lighting on the
backpack assembly are located on the right
and left side of the air cylinder. Lighting on
the front of the SCBA is located on the
second-stage regulator and PASS device.
HOW DO YOU DETERMINE THE BATTERY CONDITION?
Amber LED’s on the upper right rear of the
backpack and the front PASS device blink
once every 10 seconds to indicate a usable
battery condition. Blinking every two seconds
indicates a low battery condition.
WHAT INDICATED A LOW BATTERY?
If a low battery condition occurs during use, an amber LED on the HUD will blink every second. The SCBA may continue to be used and the
batteries shall be replaced before the next
usage.
WHAT DOES THE RED LED ABOVE THE BATTERY STATUS MEAN?
A red LED above the battery status light will
blink went the user’s remaining air supply has
reached ¼
WHAT HAPPENS WHEN THE TANK IS 1/4 FULL?
This will occur approximately at
the same time the audible low air alarm is
activating. A corresponding red LED on the
front of the HUD will blink warning others of
the users low air supply.
WHAT LET OTHER PEOPLE KNOW THE STATUS OF YOUR SCBA?
Two LED’s, one on each side of the air
cylinder act as a visual reference to the PASS
device operation.
HOW DOES YOUR SCBA ACT DURING NORMAL OPERATION?
During normal operation,
alternating green LED’s will blink once every
second. The LED lights will alternate blinking
green and red as the PASS device begins its
staged operation. At full alert, the red LED’s
will blink once every second.
WHAT IS THE AIR CYLINDER MADE OF?
The air cylinder is made of a composite
carbon fiber construction (overwrapped with
fiberglass epoxy matrix) with an aluminum
inner liner and has a maximum working
pressure of 4500 PSI.
WHAT INDICATES THE CYLINDER PRESSURE?
A pressure gauge,
built into the cylinder valve, indicates the
amount of air currently in the cylinder. The
gauge is graduated in 1000 lb. increments
from 0-6000 lbs with the full bottle range
(4000-5000 lbs.) identified in green
WHAT ARE THE TWO CYLINDER SIZES?
There are two sizes of air cylinders; 45 – minute and 60- minute.
WHAT IS THE FULL CYLINDER VALUE
When full, the cylinders contain
65.6 and 87 cubic feet of air respectively and
will provide air supply time of 45 minutes
(65.6 cu ft.) or 60 minutes (87 cu ft.) at a user
rate of 40 liters per minute.
WHEN ARE THE CYLINDERS CHANGED?
Air cylinder bottles are changed when the
cylinder gauge reads less than 4000 lbs. and
is sent to a Department approved air filling
station
HOW OFTEN ARE THE CYLINDERS TESTED?
Air cylinders are Hydrostatic tested every
FIVE years. Each year, approximately 33% of
the cylinder cache requires hydrostatic
testing
WHAT ARE THE THREE IDENITFIYING COLORS FOR CYLINDERS?
There are three identifying color LFD
letters (red, blue, and black) to simplify recall
of these cylinders for testing. Once tested, the
vendor places a decal on the cylinder
identifying year and month of test
WERE IS THE FIRST STAGE REGULATOR HOUSED?
The first-stage regulator is housed and
protected within the backpack assembly. It
connects to the air cylinder valve using a high
pressure hose and a large, easy-to-grip
stainless steel hand wheel.
THE 1ST STAGE REG REDUCES THE PRESSURE TO WHAT?
The first stage regulator lowers air cylinder pressure to approximately 115 psi, which is supplied to the second stage regulator via the
intermediate pressure hose.
WHAT IS THE RELIEF VALVE?
A relief valve
activates to protect the system should the
regulator pressure exceed 200 to 225 psi
WERE IS THE HIGH PRESSURE CONNECTION LOCATED?
A high-pressure connection for the HUD
transducer, UAC, and the remote Pressure
Gauge/PASS Alarm on the right shoulder are
all housed and protected within the backpack
assembly.
WHEN DOES THE LOW AIR ALARM EMIT ?
The integrated low air warning alarm emits an
audible-warbling whistle when the air cylinder
pressure reaches 1035 to 1215 psi. (23 to 27 %
HOW LONG WILL THE ALARM STAY ON?
The low air-warning whistle will
operate until air cylinder pressure drops below
200 psi. The whistle is located in the upper
left corner of the backpack and is protected
by the thermal and impact resistant enclosure.
WHAT IS THE SECOND STAGE REGULATOR?
The second stage regulator attaches to the
facepiece using the Air Klic system.
HOW DOES THE SECOND STAGE ACTIVATED?
The second stage regulator is
activated by the First Breath On mechanism
or by the manual override button on the front
of the regulator.
HOW MUCH AIR CAN THE SECOND STAGE SUPPLY?
The second stage regulator is capable of
supplying the user in excess 350 liters per
minute of breathing air.
WHT IS THE PURPOSE OF THE RED BYPASS KNOB
The large red knob
on the regulator controls the adjustable
bypass valve. Turning the bypass valve knob
counterclockwise provides a constant flow of
breathing air. The bypass valve is intended
for emergency use only to supply breathing
air should regulator failure occur
WHAT IS MAX LITER BREATHING AIR FOR THE BYPSSS?
The bypass valve is capable for supplying a maximum of 130 liters per minute of breathing air. When not in use the regulator should be stored in
the regulator belt clip located on the left waist
strap. The second stage regulator supplies
breathing air via an intermediate pressure
hose with a quick connect fitting.
WHAT ARE THE RELEASE BUTTONS?
Release buttons: The gray release buttons
are used to remove the regulator from the
holster and face piece. When removing the
regulator from the face piece, first press the
black shut-off button to turn off positive
pressure. Both gray release buttons must be
pressed simultaneously to remove the
regulator.
WHAT IS AND WERE IS THE SHUTOFF BUTTON?
Shut-off button: The black shut-off button is
located opposite the bypass valve. This
button is pressed before removing the
regulator from the face piece to shut off
airflow.
WHAT IS THE HUD AND WERE LOCATED?
The HUD is mounted as part of the second
stage regulator. When the second stage
regulator is attached to the facepiece, the
HUD display is visible through opening in the
facepiece nozzle cover.
WHAT IS ON THE HUD DISPLAY?
The display
consists of four green LED’s indicating from
right to left, Full, ¾, ½, and ¼.
WHAT IS THE INDICATION ON THE HUD DISPLAY?
A cylinder at
4500 psi will illuminate all 4 green LED’s. As
the pressure in the air cylinder decreases, the
LED’s turn off one at a time for each ¼ (25%)
drop in air cylinder pressure.
WHAT HAPPENS WHEN PRESSURE DROPS TO 50%
When the pressure drops below 50% of air
cylinder capacity, the LED representing ½
cylinder capacity starts to blink. The blinking
will continue for approximately 20 seconds
before returning to constant illumination.
WHT HAPPENS WHEN THE PRESSURE DROPS TO 25%
When the pressure drops below 25% of air
cylinder capacity, the LED representing ¼
cylinder capacity changes color to red and
starts to blink. A corresponding red LED on
the front of the HUD will blink warning others
of the users low air supply
WHAT HAPPENS WHEN PRESSURE DROPS TO 10%
When the
pressure drops to 10% of air cylinder
capacity, the LED representing ¼ cylinder
capacity blinks noticeably faster. The LED on
the front will also increase is blinking rate.
The increased rate of blinking will continue
until air cylinder pressure drops below 200 psi
at which time the HUD will shut-off.
WHAT IS THE PURPOSE OF THE PHOTODIODE?
A photodiode on the top of the HUD adjusts
the green LED intensity so they are not a
distraction to the user.
WERE IS THE HIGH PRESSURE HOSE?
A high pressure air hose is routed over the
right shoulder strap and attach to the Air
Pressure Gauge/PASS Alarm assembly.
HOW IS THE AIR ILLUSTRATED ON THE PASS DEVICE?
Air pressure is illustrated from full
“F” to empty “E” using quarter increments “¼
½ ¾” similar to a fuel gauge on a vehicle
WHAT HAPPENS WHEN YOU OPEN THE CYLINDER?
Opening the air cylinder valve arms the PASS
device as air pressurizes the system. An
ascending tone and alternating green flashing
LED lights indicate activation.
HOW DO YOU ACTIVATE THE PASS DEVICE?
The PASS device can be manually
triggered to full alert by depressing and
holding the red alarm button for 1 to 2
seconds. Once the PASS reaches full alert, it
can only be reset to normal operation by two
slow and deliberate clicks of the yellow reset
button the side of the housing
HOW DO YOU SHUT THE PASS DEVICE OFF?
Two additional slow and deliberate clicks of the
yellow reset button will shut-off the PASS
device if the air has been bleed from the
system.
WHAT WILL START THE STAGED ALARM?
Lack of movement will start the staged alarm
in approximately 20 seconds. The LED lights
will alternate flashing green and red.
WHEN WILL THE DEVICE INCREASE IN TONE IN STAGED ALARM?
The alarm will increase in volume approximately
every 5 seconds until full alert at 30 to 35
seconds. In full alert, the LED lights flash red
and the alarm tones alternate between the
front and rear mounted piezo speakers.
WHAT IS THE PASS DEVICE POWERED BY?
The PASS device is powered by the 4 C-cell
batteries in the backpack. An amber LED in
the PASS device acts as the battery status
indicator for the front of the SCBA.
WHAT IS THE BBS DESIGNED TO DO?
The Buddy Breathing System (BBS) is
designed to allow connection to a supplied air
line or another BBS. It is intended to supply
EMERGENCY AIR to a fire fighter who has
become lost, trapped, or disoriented in an
IDLH environment.
WERE IS THE BBS LOCATED?
The BBS is located in a
storage pouch on the wearers left hip and
consists of a 39 inch intermediate pressure
hose and a “Y” block with a male and female
quick connect.
