
USING THE AIR MASK
22
TAL 1705 (L) Rev. 18 - 10082858
Control Module or NightFighter HUD Transmitter for
approximately three seconds.
• When 25% of the rated service pressure has been
reached, a single flashing red LED will be displayed
and will continue to flash until the unit is turned off
or the cylinder has been refilled (M7 HUD only).
• The FireHawk M7 HUD or I-HUD must be within
approximately 18 inches of the FireHawk M7
Control Module or NightFighter HUD Transmitter to
properly receive the signal being transmitted.
2. Both the FireHawk M7 HUD and I-HUD have a buddy
light that flashes red when the air mask has reached
25% of the rated service pressure. This buddy light is
not visible to the user while the air mask is in use.
3. For integrated PASS versions, when the user of the air
mask remains motionless for approximately 20 sec-
onds, the PASS pre-alarm will begin to sound (inte-
grated PASS version). During this pre-alarm, the
FireHawk M7 HUD or I-HUD will display an orange
LED, and this LED will extinguish when full PASS
alarm has been reached or the pre-alarm has been
reset.
4. When an evacuation command has been sent to the
user (if the optional FireHawk M7 Telemetry Module is
in use), the FireHawk M7 HUD or I-HUD will display an
alternating red and orange LED until the evacuation
has been confirmed.
5. The FireHawk M7 HUD or I-HUD has a photo sensor
that automatically adjusts the brightness of the LEDs
based on the intensity of the ambient light measured
outside of the facepiece.
6. The FireHawk M7 HUD or I-HUD indicates a low bat-
tery condition by a single flashing yellow LED. When
the FireHawk M7 Power Module or NightFighter HUD
Transmitter reaches a low battery condition, a double
flash of the yellow LED will be displayed in the
FireHawk M7 HUD or I-HUD. If both the FireHawk M7
HUD or I-HUD and FireHawk M7 Power Module or
NightFighter HUD Transmitter have reached a low bat-
tery condition, the FireHawk M7 HUD or I-HUD will
display an alternating single and double flash of the
yellow LED. If this condition exists, return to fresh air,
and replace the batteries immediately. See Replacing
Batteries in the FireHawk M7 HUD or I-HUD.
Refer to Chart 1 for a full description of all FireHawk M7
HUD LED patterns.
Refer to Chart 2 for a full description of all FireHawk M7
I-HUD LED patterns.
R
G
G
G
Y
G
G
G
G
Y
76% to 100%
Full Cylinder, 4 Green LED
20 Sec. Steadily ON
75% to 51%
3/4 Full Cylinder, 3 Green LED
20 Sec. Steadily ON
34% TO 50%
1/2 Full Cylinder, 2 Yellow LED
30 Sec. Flashing ON/OFF
33% to 0%
1/4 Full Cylinder, 1 Red LED
Flashing Continuously
Yellow LED, Low Battery
HUD and/or HUD Transmitter
Flashing Continously
Y
R
O
Orange LED for PASS Pre-Alarm
Red/Orange LED for Evacuation Signal
Alternating Red/Orange
(telemetry module)
Chart 1: FireHawk M7 HUD LED Patterns
Содержание FireHawk M7
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