8. To check manual activation of the full alarm, push and
HOLD the alarm button on the front of the unit.
9. Reset the Alarm. Press RESET (yellow) button 2 times
within approximately 1 second.
10. Stand motionless until the pre-alarm sounds. Shake
unit to reset the alarm.
11. If the ICM Tx Unit passes these functional checks,
complete all remaining SCBA donning steps in the
SCBA user’s instruction manual.
12. Disconnect the second stage regulator from the face-
piece.
13. Close the cylinder valve fully.
14. Slowly crack the bypass valve on the second stage
regulator to bleed off pressure until the ICM Tx Unit
pressure reading drops below the following values:
a. 530psig - approximately (2216psi system),
b. 750psig - approximately (3000psi System),
c. 1050psig - approximately (4500psi system)
A single flashing RED LED should be displayed in the
Nightfighter Heads-Up Display System Receiver at the
appropriate pressure listed above. The Audi-Larm will
ring and the ICM Tx Unit will sound and flash a red
light at the appropriate pressure listed above.
15. When the pressure falls below 200psig, turn the ICM
Tx Unit off (Sleep Mode) by pressing the RESET (yel-
low) button 2 times in rapid succession.
USING THE ICM TX UNIT
11
TAL 709 (L) Rev. 4 - 10058881
