Firefighter Pre-Basic II

Proper knowledge and use of personal protective clothing and self-contained breathing apparatus is necessary to help provide a safe working environment for the emergency service provider. Session Reference: 2 Topic: Firefighter Pre-Basic II...


• Connected to high pressure hose and fastened to left shoulder strap

• Shows pressure reading whenever pressure on system

• Have student compare cylinder and gauge near shoulder strap, go by lowest pressure

• Should never be more than 100 psi difference. If so, have checked by service personnel

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• Facepiece mount regulators

• No mainline valve - system is activated by inhaling

• Does not have by-pass valve - system is designed to fail in the open position

• Purge valve - for purging contaminants from the facepiece

• Doffing control - shuts off air to facepiece prior to doffing

• Locking device - to assure regulator to facepiece connection

• Gasket - sealing regulator to facepiece

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• Personal Alert Safety System (PASS)

• Purpose - to alert others of a downed or lost firefighter

• Integrated into breathing apparatus and turned on automatically when SCBA cylinder turned on

• Function

• Detects lack of motion for 30 second time period

• Sounds pre-alert signal at 18 seconds

• May be de-activated by tapping or by movement

• Without de-activation pre-alert goes to full alert. Can only be de-activated by resetting

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• Facepiece assembly

• Facepiece - covers/protects the face and provides for inhalation and exhalation of low pressure air

• Exhalation valve - allows exhaled air to leave the facepiece and stops smoke and toxic gases from entering facepiece on inhalation

• Can sometimes become stuck, preventing exhaled air leaving by way of the exhalation valve; causes air to blow out around the face seal

• To correct, try blowing out hard while holding facepiece tight to face

• Positive pressure - exhalation valve on the facepiece is equipped with a pressure balancing mechanism - air does not continuously flow, but does maintain a positive pressure inside the facepiece

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• Speaking diaphragm - allows wearer to communicate more clearly

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• Nose cup - deflects exhalation away from lens to prevent fogging

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• Spider or facepiece harness - strap which holds the facepiece firmly against the face. Be sure straps are fully extended when putting away (check for wear and tear)

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After Use Maintenance

• Recharge/replace cylinder if at 90% capacity or less

• Inspect "O" ring and gasket

• Inspect facepiece

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• Clean facepiece

• Submerge in approved cleaner/disinfectant with warm water

• Rinse in warm water

• Air dry - do not connect facepiece regulator to facepiece when regulator is wet

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• Inspect and clean harness

• Check operation of all gauges and valves

• Defective units should be removed from service, tagged, and sent for repair or replacement

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Operational Rules for SCBA

• Use only when in good health and physical condition

• Do not use when overexerted, or if already suffering from smoke inhalation

• Check operation of apparatus before entering the fire area

• Work in pairs - apparatus can malfunction; two people are more than twice as effective as one

• When possible, stay in contact with hoseline or use a lifeline to speed escape if necessary. If disoriented, locate a wall and follow it to a window or door. Feel the floor for cracks between floor boards or tiles to avoid crawling in circles

• Conserve air - make every movement count

• Be familiar with apparatus used, through training and practice

• Be able to work using touch and hearing only

• Know limitations of breathing apparatus - what it can and cannot do

• Know your own limitations and do not exceed them

• Allow enough time for exit when low pressure alarm sounds. You may have to move quickly since you are more than a half bottle time into the fire area

• Always extend all straps fully when removing the breathing apparatus