FIREHAWK M7 I-HUD QUICK REFERENCE GUIDE
2. Position the I-HUD retain-
ing clip on the speaking
diaphragm housing.
Ensure the locking mecha-
nism located on the top of
the clip is facing towards
you and the fingers at the
bottom of the clip are
engaged around the rib
above the inhalation valve.
3. Thread the speaking
diaphragm retaining ring
onto the housing.
NOTE:
There should only be a little play in the I-HUD retaining
clip; it must not swivel/rotate behind the retaining ring.
4. Re-install the nosecup.
NOTE:
The I-HUD retaining clip will not interfere with the
installation or positioning of the nosecup.
5. Orient the I-HUD in the facepiece so that the retention arms
are slightly pushing against the two baffles on the nosecup.
6. Using your fingers, carefully work the baffle so the I-HUD
retention arms are between the baffle and the facepiece
lens. This must be done on both sides.
7. Install the I-HUD by push-
ing forward on the center
nose-bridge. The locking
mechanism (top arm of
the retaining clip) will
wrap around the I-HUD’s
nose-bridge from the
backside. Push forward on
the arm of the clip to
ensure there is little to no
space between the bend
of the locking arm and the
nose-bridge of the I-HUD.
NOTE:
To remove the I-HUD, pull the locking arm away from the
nose bridge of the I-HUD. Pull the arm back and away on an
angle. The locking arm is constructed of spring steel , allowing
the arm to spring back into the proper position for the next
I-HUD insertion.
DO NOT attempt to remove the I-HUD by pulling on one side or the
other as this may cause damage to the device. Use only even force
on both sides of the device. Misuse can result in death or serious
injury.
NOTE:
Refer to the chart on the next page for a full description of all
I-HUD LED patterns.
REPLACING THE BATTERY
Replace the battery in the I-HUD when it indicates a low battery
condition (single flashing yellow LED). Use only recommended
battery types. Change the battery in a non-hazardous area only.
Misuse can result in death or serious injury.
1.
Unthread the battery cap (counter-clockwise) on the I-HUD battery
tube.
2.
Remove the battery and discard.
3. Ensure that moisture or debris is not present in the battery
compartment.
4.
Inspect the battery cap for signs of damage such as corrosion on
the battery terminal or cracks in the cap. If the battery cap is
damaged, replace the cap immediately.
5.
Insert a replacement battery.
Use only Duracell Ultra M3, Panasonic PhotoPower Cr2, or
Energizer CR2 Photo lithium batteries in the FireHawk M7 I-HUD.
Use of other batteries will affect the performance of the unit and
void the Intrinsic Safety Approval. Misuse can result in serious injury
or death.
6.
Before installing the battery cap, verify that the o-ring is in place and
free of damage and debris. If the o-ring is missing or damaged,
replace o-ring. Failure to do so may allow
moisture or contaminants into the housing and cause the device to
not function properly.
7.
Thread the battery cap into the housing and tighten until the index
mark on the battery cap aligns with the index mark on the housing.
Do not over-tighten the battery cap. Over-tightening the battery
cap can result in a cracked housing and a compromised water seal.
Failure to follow this warning can result in serious injury or death.
8.
Verify that the I-HUD display turns on and goes through its start up
sequence before turning off. The yellow LED should not be flashing.
Always test the I-HUD and the entire air mask to be sure that the
system operates properly before entering any hazardous
atmosphere. DO NOT use this device unless it passes all inspection
and functional tests. Misuse can result in serious injury or death.
2
MSA 715 (L) Rev. 4 - 10122587
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