Heads Up Display - Honeywell Titan SCBA Training Manual

The HUD is mounted as part of the second stage regulator. When the second stage regulator is at-
tached to the facepiece, the HUD display is visible through opening in the facepiece nozzle cover.
When the air cylinder valve is opened, the HUD will activate automatically, and indicate the pressure
available in the air cylinder. The display consists of four green LED's indicating from right to left,
Full, ¾, ½, and ¼. 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 1/3 (33%) drop in air cylinder pressure.
Regulator Release
Button
Bottle pressure less than 1/3 will
cause LED to switch from green
to blinking red.
When the pressure drops below 50% of air cylinder capacity, the LED representing % cylinder capacity
starts to blink. The blinking will continue for approximately 20 seconds before returning to constant
illumination.
When the pressure drops below 33% of air cylinder capacity, the LED representing 1/3 cylinder capac-
ity 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. When the pressure drops to 10% of air cylinder ca-
pacity, the LED representing 1/3 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.
8. HEADS-UP DISPLAY (HUD)
14
Bypass Valve
Low Battery Warning
Amber LED will flash every second.